Student Loan Calculator

Student Loan Calculator Guide: Estimate Payments, Interest, Balance at Repayment, and Total Cost

A student loan should be evaluated before the money is borrowed, not only when repayment begins. A $10,000 funding gap today can create years of principal and interest obligations after graduation, and the amount ultimately repaid can be materially larger than the amount originally received.

The first input is principal: the amount borrowed. That number should come from an actual college funding gap rather than from the maximum amount a lender is willing to provide. Use the College Cost Calculator first when you are still determining how much of college cost actually remains unfunded after grants, scholarships, savings, family resources, and other non-loan funding.

The second input is the interest rate. Federal Student Aid explains that federal student loans generally have fixed interest rates once disbursed, while the applicable rate depends on the loan type and the date the loan was paid out. Private student loans can have different fixed or variable-rate terms depending on the lender and contract.

Interest timing matters because student loans can begin accruing interest before the borrower begins making required payments. Federal Student Aid states that Direct Loans use daily interest. Interest is calculated from the outstanding principal using the annual rate converted into a daily rate and the number of days since the last payment.

Direct Subsidized and Direct Unsubsidized Loans also behave differently before repayment. Federal Student Aid explains that the federal government generally covers interest on eligible Direct Subsidized Loans during qualifying in-school, grace, and deferment periods, while borrowers are responsible for interest accruing on Direct Unsubsidized Loans during those periods.

That means two students who each receive $20,000 of federal loans can enter repayment with different amounts of unpaid interest depending on the mix of subsidized and unsubsidized borrowing, the timing of disbursements, and whether interest was paid while the student was in school.

Capitalization is another important concept. Capitalization occurs when qualifying unpaid accrued interest is added to principal. Once that happens, future interest accrues on a larger principal amount. Federal Student Aid specifically warns that capitalization increases the overall cost of borrowing.

Repayment terms also require care. For older federal loans, many borrowers recognize the traditional 10-year Standard Repayment Plan. Beginning July 1, 2026, however, the federal repayment system changed. Borrowers with qualifying Direct Loans first disbursed on or after that date can be placed under the Tiered Standard framework, where fixed-payment repayment periods vary according to total outstanding principal, while RAP became the income-driven option available under the new structure.

For that reason, a generic student-loan calculator should not label every federal loan a “10-year standard loan.” The calculator should allow a user-entered repayment period for ordinary amortization and direct federal borrowers to the current repayment rules when plan eligibility matters.

The payment formula itself is straightforward. Once a principal balance entering repayment, interest rate, and fixed repayment period are known, a standard amortization formula can estimate the monthly payment. The more difficult part is ensuring that the principal entering that formula accurately reflects what happened before repayment began.

This calculator therefore follows the loan through the full lifecycle: amount borrowed, in-school interest, grace-period interest, capitalization where applicable, repayment principal, monthly payment, interest during repayment, and optional extra payments.

How to Calculate Student Loan Cost From Disbursement Through Repayment

Enter the amount actually borrowed: Use the loan principal rather than the college sticker price. If you are still determining your borrowing need, start with the College Cost Calculator.
Identify whether the loan is federal or private: Federal and private student loans can differ in interest, grace periods, deferment rules, repayment options, forgiveness eligibility, and borrower protections.
Enter the interest rate for each loan: Federal loans from different academic years can carry different fixed rates. Model loans separately when the rates differ materially.
Separate subsidized and unsubsidized federal loans: This determines whether the borrower is responsible for interest during applicable in-school, grace, or deferment periods.
Enter the expected time before repayment begins: For loans accruing borrower-paid interest during school or grace, this allows the calculator to estimate unpaid interest before repayment.
Choose whether accrued interest is paid or left unpaid: Paying accruing interest before capitalization can reduce the principal that eventually enters repayment.
Enter the repayment term: Use the repayment period applicable to the scenario. Do not assume every federal borrower now uses a 10-year standard term.
Review the monthly payment and total repayment: A lower monthly payment produced by a longer term generally increases the amount of time interest accrues.
Test extra payments: Additional principal repayment can shorten the payoff period and reduce interest when applied according to the loan terms.
Use a separate IDR calculation when income determines payment: Traditional amortization does not reproduce federal income-driven payment formulas. Use the Income-Driven Repayment Calculator when income, family circumstances, and federal plan eligibility determine the required payment.

Formula and variables

For a fixed-payment repayment scenario, P is the principal balance entering repayment, including capitalized interest when applicable; r is the periodic interest rate; and n is the number of scheduled payments. Federal student loans accrue interest daily in actual servicing, so the monthly amortization formula is a planning approximation for fixed repayment rather than an exact reproduction of every servicer statement.

Monthly Payment = P × [r(1 + r)ⁿ] ÷ [(1 + r)ⁿ − 1]

O — Original amount borrowed: The student-loan principal originally disbursed before interest accrual and repayment.
Iₛ — In-school accrued interest: Interest accruing while the borrower is enrolled when the borrower is responsible for that interest.
Iɢ — Grace-period accrued interest: Interest accruing during the applicable grace period when the borrower is responsible for it.
CI — Capitalized interest: Eligible unpaid accrued interest that is added to principal under the applicable loan rules or contract.
P — Principal entering repayment: The balance used in the repayment calculation after applicable capitalization and adjustments.
r — Periodic interest rate: The annual interest rate converted to the periodic rate used in the modeled payment formula.
n — Number of payments: The number of scheduled payments in the selected repayment term.
PMT — Monthly payment: The modeled fixed payment required to amortize the repayment balance over the selected term.
EP — Extra payment: An optional amount paid beyond the scheduled payment and applied according to the loan servicer or lender rules.

Scenario 1: $30,000 Borrowed Can Enter Repayment Above $30,000 When Interest Accrues Before Repayment

A student borrows $30,000 of unsubsidized student loans at a simplified average fixed rate of 6.5%. For illustration, the full amount is treated as outstanding for three years before repayment and the borrower makes no interest payments during that period. The example assumes approximately $5,850 of pre-repayment interest before any applicable capitalization, then models a 10-year fixed-payment repayment schedule.

Original principal: $30,000
Illustrative interest rate: 6.5%
Illustrative pre-repayment interest period: 3 years
Estimated unpaid interest: About $5,850
Modeled repayment principal after capitalization: About $35,850
Fixed repayment term: 10 years

Start with $30,000 of principal.
At a simplified 6.5% annual calculation, three years of unpaid interest would be approximately $5,850.
If that full amount capitalized under the applicable loan terms, the repayment principal would become approximately $35,850.
A 10-year fixed amortization at 6.5% on $35,850 produces a modeled payment of approximately $407 per month.
Total scheduled repayment would be approximately $48,800.
The difference between original $30,000 principal and total cash repaid illustrates both pre-repayment interest and interest generated during the repayment period.

Result: Under the simplified scenario, $30,000 originally borrowed enters repayment near $35,850 and produces a fixed payment of roughly $407 per month over 10 years.

The example illustrates why college borrowing should be evaluated before graduation. The amount appearing on the repayment schedule can exceed the amount originally borrowed when the borrower is responsible for interest accruing before repayment and that interest is later added to principal.

Understanding your results

Original amount borrowed

This is the amount financed for education before interest.

Compare it with the college funding gap to make sure borrowing is solving an identified need rather than simply using all available credit.

Interest accrued before repayment

This estimates interest generated before scheduled repayment begins for loans where the borrower is responsible for that interest.

Subsidized federal loans can behave differently from unsubsidized and private loans during qualifying periods.

Balance entering repayment

This is the modeled principal used to calculate scheduled payments after applicable capitalization.

It can exceed the original amount borrowed.

Monthly payment

This is the modeled fixed payment required to repay the entered balance under the selected term and rate.

Income-driven federal plans require a different formula and should not be interpreted from this number alone.

Total interest

This measures the modeled financing cost generated during the repayment period, with pre-repayment interest shown separately where possible.

Separating the two helps identify how much cost accumulated before versus after repayment began.

Total repayment

This is the cumulative amount paid under the modeled repayment path.

It should be compared with original principal to understand the full borrowing cost.

Assumptions

Fixed-payment scenarios use a constant interest rate during repayment.
The loan balance entering repayment incorporates only the capitalization assumed by the selected scenario.
Federal loan interest accrual is approximated for planning even though actual Direct Loan interest accrues daily.
No delinquency, default, collection charges, or late fees occur.
No forgiveness or discharge is assumed unless explicitly modeled elsewhere.
No new student-loan borrowing occurs after the starting balance is established.
Extra payments are assumed to reduce the outstanding obligation according to the lender or servicer payment rules.
Private student-loan terms are determined by the borrower-entered contract assumptions.
Federal repayment-plan eligibility is not determined solely by this amortization calculation.
The calculator provides estimates rather than official servicer payment amounts.

Limitations

Federal student-loan repayment rules changed substantially beginning July 1, 2026. Plan eligibility depends on loan type and disbursement date, so a generic amortization result should not be used as a substitute for Federal Student Aid’s current repayment-plan eligibility determination.
Federal Student Aid states that Direct Loans use daily interest. Exact monthly interest can therefore vary with the number of days between payments rather than matching a simple monthly-rate approximation exactly.
Federal loans can have different fixed interest rates based on the academic year and loan type. A weighted average can simplify planning but does not reproduce each loan’s exact accrual path.
Direct Subsidized and Direct Unsubsidized Loans have different interest responsibility during certain periods.
Capitalization rules vary according to loan type, repayment status, consolidation, deferment, and other circumstances.
Private student loans can have variable rates, different capitalization rules, cosigners, alternative grace periods, fees, and repayment features that differ materially from federal loans.
Federal income-driven plans calculate payment using statutory rules rather than ordinary amortization alone.
Federal student-loan forgiveness and discharge programs depend on eligibility requirements beyond monthly payment mathematics.
The calculator cannot determine eligibility for Public Service Loan Forgiveness, disability discharge, school-related discharge, borrower defense, or other federal programs.
Repayment periods can change after consolidation, plan changes, deferment, forbearance, or delinquency.
Interest can continue accruing during certain deferment and forbearance periods.
Federal auto-pay interest-rate benefits can change over time and should not be hardcoded permanently into the calculator. Current Federal Student Aid guidance notes a temporary 1% Direct Loan auto-pay rate reduction beginning July 1, 2026 for qualifying borrowers enrolled by the applicable deadline and lasting through June 30, 2028.
The calculator does not determine whether borrowing for a particular educational program is economically justified by future earnings.

Common mistakes

Borrowing the maximum offered instead of the actual college funding gap.
Assuming loans reduce college net price.
Treating subsidized and unsubsidized loans as economically identical.
Ignoring interest accruing during school on unsubsidized loans.
Ignoring grace-period interest where the borrower is responsible for it.
Assuming the balance at graduation will equal the amount originally borrowed.
Using one interest rate for several loans with materially different fixed rates without understanding the approximation.
Assuming every federal loan follows the traditional 10-year Standard Repayment Plan in 2026.
Using a fixed-payment calculator to estimate an income-driven payment.
Choosing the longest possible repayment term solely to lower the required monthly payment.
Ignoring total repayment when comparing loan terms.
Refinancing federal loans privately without considering the federal benefits that can be permanently lost.
Making extra payments while continuing to take unnecessary new student-loan debt.

Practical use cases

Scenario 2: Compare borrowing $15,000 versus reducing the funding gap first

A student has a $15,000 annual college funding gap but can reduce expenses by $4,000 and obtain an additional $2,000 scholarship.

Instead of borrowing $15,000, the student borrows $9,000. The loan calculator then shows the repayment impact of solving part of the cost problem before financing it.

Scenario 3: Pay unsubsidized interest while in school

A borrower can afford to pay accruing interest on an unsubsidized loan during school.

Doing so does not reduce the original principal but can reduce unpaid interest that might otherwise remain outstanding or capitalize later, lowering the balance entering repayment.

Scenario 4: Compare a shorter term with a lower payment term

A borrower can choose between a larger monthly payment over a shorter period and a smaller payment over a longer period.

The longer term can improve monthly cash flow but generally increases total interest because the balance remains outstanding longer.

Scenario 5: Make an extra $100 monthly payment

The borrower enters repayment with a fixed payment but can consistently contribute another $100 each month.

The calculator can show the revised payoff date and reduced interest rather than treating the scheduled term as unavoidable.

Scenario 6: Federal repayment requires a plan-specific calculation

A borrower’s income is low relative to federal student debt.

A standard amortization payment appears unaffordable, but the borrower may qualify for an income-driven structure. Use the Income-Driven Repayment Calculator rather than changing the amortization term arbitrarily.

Planning and decision guide

Borrow from the funding gap, not from the lender limit

Federal student loans have annual and aggregate borrowing limits, while private lenders can use their own underwriting limits.

Neither limit is a recommendation to borrow the full amount. Start with the actual uncovered college cost from the College Cost Calculator.

Scenario 7: Eligible for $10,000, need only $6,000

The student is offered more loan eligibility than the remaining college funding gap.

Borrowing only the $6,000 actually needed avoids paying interest on an unnecessary additional $4,000.

Federal student-loan interest rates are fixed after disbursement

Federal Student Aid states that federal student loans have fixed interest rates and that the applicable rate depends on the loan type and disbursement date.

A loan borrowed in one academic year can therefore carry a different rate from a loan borrowed the next year.

Scenario 8: Four academic years create four rate cohorts

A student borrows each year of college.

Instead of treating the entire portfolio as one loan, the borrower can model each annual disbursement separately and then combine the projected payments for a more accurate repayment estimate.

Current 2026–27 undergraduate Direct Loan rates should not become permanent calculator defaults

Current federal servicer guidance lists a 6.52% fixed rate for Direct Subsidized and Direct Unsubsidized undergraduate loans first disbursed from July 1, 2026 through June 30, 2027.

That rate is tied to the disbursement period and should be updated when federal rates change rather than hardcoded as the universal student-loan rate.

Daily interest is more precise than monthly-rate shorthand

Federal Student Aid states that Direct Loans are daily-interest loans.

The approximate daily interest calculation is outstanding principal multiplied by the interest-rate factor for each day interest accrues.

Scenario 9: February and March do not necessarily accrue identical interest

The outstanding principal and annual rate stay unchanged.

Because the number of days between payments differs, actual accrued interest can differ from one payment period to another even when the required monthly payment is fixed.

Use monthly amortization for planning, daily interest for precision

A monthly amortization formula provides a useful payment estimate and is easy for users to understand.

The page should explain that actual federal servicing calculates interest daily so statement-level figures can differ slightly.

Subsidized and unsubsidized loans should not share the same pre-repayment assumptions

Federal Student Aid explains that eligible Direct Subsidized borrowers are generally not responsible for interest during qualifying in-school, grace, and deferment periods.

Unsubsidized borrowers are responsible for interest that accrues during those periods.

Scenario 10: Same principal, different balance at repayment

Student A has subsidized borrowing while Student B has unsubsidized borrowing at the same principal and rate.

Student B can accumulate borrower-paid interest before repayment begins, while qualifying subsidized interest treatment can reduce or eliminate the comparable pre-repayment interest burden.

Grace period is a payment delay, not necessarily an interest holiday

Most federal student-loan borrowers receive a six-month grace period after leaving school or dropping below half-time, although not every federal loan type has a grace period.

Federal servicer guidance notes that interest can still accrue during grace on loans for which the borrower is responsible.

Scenario 11: Six months without payment still increases unpaid interest

A borrower leaves school with unsubsidized loans and makes no payments during grace.

The grace period delays the first required payment but does not necessarily prevent interest from continuing to accumulate.

Paying interest during school can reduce later cost

When the borrower is responsible for accruing interest, voluntary interest payments can prevent unpaid interest from accumulating.

This can reduce the amount potentially subject to later capitalization.

Scenario 12: $50 per month toward accruing interest

A student cannot make full loan payments while enrolled but can contribute $50 monthly toward interest.

Those payments reduce unpaid accrued interest without requiring a full amortizing payment during school.

Capitalization increases the balance on which future interest can accrue

Federal Student Aid defines capitalization as adding unpaid interest to principal.

Once interest becomes principal, future interest calculations use the larger principal balance, increasing overall cost.

Scenario 13: $2,000 unpaid interest becomes principal

A borrower originally owes $25,000 principal and has $2,000 of interest that capitalizes.

Future interest is then calculated from approximately $27,000 rather than $25,000, subject to the actual loan terms.

Do not assume unpaid interest capitalizes every month

Interest can accrue without immediately becoming principal.

Capitalization occurs only under applicable loan-program or contractual rules, so the calculator should distinguish accrued interest from capitalized interest.

Scenario 14: Accrued interest remains separate until a capitalization event

The account shows principal plus unpaid accrued interest.

The calculator should not automatically compound that unpaid interest every month as though it were already principal.

Consolidation can trigger capitalization of unpaid interest

Federal Student Aid warns that when federal loans are consolidated, unpaid interest can be added to principal.

Borrowers considering consolidation should therefore review accrued interest before assuming the new principal simply equals the sum of the old principal balances.

Scenario 15: $27,000 principal plus $3,000 unpaid interest

The borrower consolidates the federal loans.

If the $3,000 unpaid interest capitalizes in consolidation, the new principal can begin near $30,000 rather than $27,000.

Standard amortization answers a different question from IDR

A fixed-payment formula asks what payment repays a known principal over a known term.

Income-driven repayment asks what payment the federal rules require based on income and other plan-specific inputs.

Scenario 16: $500 amortization payment versus lower income-driven payment

The borrower’s 10-year-style amortization payment is about $500.

An eligible federal income-driven plan could produce a different required payment. That lower payment can change interest accumulation and payoff duration, so it belongs in a separate plan-specific calculator.

The Income-Driven Repayment Calculator should use current 2026 rules

Federal Student Aid states that IDR eligibility now depends heavily on when Direct Loans were first disbursed.

Loans first disbursed on or after July 1, 2026 generally use RAP as the available income-driven option, while older loans may have access to other plans depending on loan type and eligibility.

The old universal 10-year Standard assumption is now incomplete

Traditional Standard Repayment remains relevant for eligible older federal loans.

But current federal servicer guidance states that borrowers with Direct Loans first disbursed on or after July 1, 2026 can fall under the Tiered Standard Plan instead.

Tiered Standard repayment period depends on total principal

Current federal servicer guidance describes fixed Tiered Standard repayment periods based on total outstanding Direct Loan principal when the borrower enters the plan.

The maximum period currently ranges from 10 years below $25,000 to 25 years for balances of at least $100,000.

Scenario 17: Two borrowers with different principal receive different fixed repayment horizons

Borrower A enters Tiered Standard with $20,000 while Borrower B enters with $110,000.

The applicable maximum repayment periods differ, so a generic fixed 10-year assumption would misrepresent Borrower B’s federal plan structure.

Longer repayment lowers payment but generally increases interest exposure

The amortization principle remains the same even when federal plan names change.

Stretching repayment over more years reduces the amount of principal that must be repaid each month but keeps the balance outstanding longer.

Scenario 18: 10 years versus 20 years

The 20-year payment is substantially lower.

The borrower makes many more payments and can accumulate materially greater total interest unless other federal plan benefits change the outcome.

Do not treat repayment term as the only affordability lever

If the standard fixed payment is unaffordable, federal borrowers should examine repayment-plan eligibility rather than simply inventing an arbitrary 30-year term.

Private borrowers should review lender options and contract terms separately.

Extra payments reduce principal exposure

When payments exceed accrued interest and applicable amounts, additional funds can reduce outstanding principal.

Lower principal produces lower future interest accrual.

Scenario 19: Add $100 per month

The scheduled payment is $400, and the borrower can sustainably pay $500.

The additional $100 accelerates principal reduction, shortening the payoff horizon and reducing total interest in a standard amortizing scenario.

Do not refinance federal student loans privately without modeling lost federal protections

Private refinancing can replace federal loans with a new private loan.

Once federal debt is refinanced privately, federal repayment plans, federal forgiveness options, and other federal benefits generally do not transfer to the new private debt.

The Student Loan Refinance Calculator should compare more than APR

A lower private rate can reduce payment or interest.

The refinance decision should also account for federal protections being surrendered, term reset, fees, fixed versus variable rates, and the borrower’s expected use of federal repayment or forgiveness programs.

Scenario 20: Lower rate but loss of federal flexibility

A borrower can reduce a federal loan rate through private refinancing.

If the borrower later needs income-driven repayment or qualifies for federal forgiveness, the economic value of the lost federal options can outweigh part of the interest savings.

Private student loans require contract-specific inputs

Private lenders can offer fixed or variable rates, different grace periods, cosigner terms, capitalization schedules, fees, and repayment structures.

The calculator should therefore let users enter the actual contract instead of applying federal assumptions automatically.

Scenario 21: Variable private rate rises after graduation

The student modeled repayment using the initial rate.

If the rate is variable and later increases, monthly cost and total repayment can rise. Stress-test the rate rather than assuming the initial quote lasts for the life of the loan.

Cosigner obligations belong in private-loan planning

A cosigned private student loan can affect another person’s credit and legal repayment responsibility.

The existence of a cosigner should not be treated merely as a way to qualify for a lower rate.

Student-loan payments affect broader household debt capacity

Required monthly student-loan payments can affect the household’s broader debt profile.

Use the DTI Ratio Calculator when evaluating mortgage or other future credit capacity.

Scenario 22: College debt affects home-buying plans

A graduate can afford the student-loan payment in isolation.

The same payment becomes one of several required monthly obligations when the borrower later applies for a mortgage, so the broader debt picture matters.

Current federal auto-pay discounts are time-sensitive

Federal Student Aid currently states that qualifying Direct Loan borrowers enrolled in auto pay can receive a temporary 1% interest-rate reduction beginning July 1, 2026, with the current special benefit scheduled through June 30, 2028 for qualifying enrollment.

This should be treated as a dated policy feature, not a permanent calculator assumption.

Scenario 23: Do not build a 20-year projection around a temporary discount

The borrower receives a current auto-pay reduction.

The calculator can optionally model the temporary benefit during its stated period, but the long-term base loan rate should remain visible because the temporary reduction is not scheduled for the full repayment horizon.

Deferment and forbearance solve cash-flow problems temporarily, not repayment cost automatically

Federal Student Aid advises borrowers to treat deferment or forbearance as short-term relief options when needed.

Interest can continue accruing during these periods, and they can affect some forgiveness or discharge pathways.

Scenario 24: Six-month forbearance increases unpaid interest

The borrower temporarily stops required payments.

If interest continues accruing, the balance can be larger when repayment resumes, even though the forbearance successfully addressed a short-term cash-flow emergency.

Federal consolidation and private refinancing are not the same transaction

Federal Direct Consolidation combines eligible federal loans within the federal system.

Private refinancing replaces loans with private credit and can remove federal benefits. The two should never be described interchangeably.

Borrowing cost should be evaluated at the degree level

A freshman loan may look manageable by itself.

Repeat borrowing across several academic years can create a substantially larger portfolio before repayment begins.

Scenario 25: $7,500 per year becomes $30,000 principal

The student evaluates each annual loan independently.

A four-year projection reveals $30,000 of principal before accounting for any borrower-paid interest that accumulates during school.

Graduate borrowing should be added to undergraduate debt before repayment decisions

A student who immediately enters graduate school can continue accumulating new debt before undergraduate loans are fully repaid.

The combined portfolio—not the undergraduate balance alone—should be used when evaluating eventual monthly obligations.

Parent debt should remain separate from student debt

Parent PLUS debt is legally borrowed by the parent, not the dependent undergraduate student.

Use the Parent PLUS Loan Calculator to model the parent’s repayment rather than merging those balances into the student’s own loan total.

The strongest student-loan calculator shows the lifecycle, not just the payment

Users should be able to see original principal, accrued pre-repayment interest, capitalized interest, balance entering repayment, scheduled payment, total repayment, and extra-payment savings.

That makes the cost of borrowing visible before the first bill arrives.

Frequently asked questions

How do I calculate my student loan payment?

For a fixed-payment loan, use the principal entering repayment, interest rate, and number of scheduled payments in a standard amortization formula.

How much will I pay per month on student loans?

It depends on the amount entering repayment, interest rate, repayment term, and whether the payment is fixed or determined by a federal income-driven plan.

How much interest will I pay on student loans?

It depends on principal, interest rate, time before repayment, capitalization, repayment duration, and any extra payments.

Does student loan interest accrue while I am in school?

It depends on the loan. Federal Student Aid explains that borrowers are generally responsible for interest on Direct Unsubsidized Loans during school, while qualifying Direct Subsidized Loans receive federal interest benefits during certain periods.

What is a subsidized student loan?

A Direct Subsidized Loan is a federal loan for eligible undergraduate students where the federal government generally pays interest during qualifying in-school, grace, and deferment periods.

What is an unsubsidized student loan?

A Direct Unsubsidized Loan is a federal loan where the borrower is generally responsible for interest from disbursement, including while in school and during many periods when payments are not required.

How is federal student-loan interest calculated?

Federal Student Aid states that Direct Loans use daily interest based on outstanding principal, the interest-rate factor, and the number of days since the last payment.

Do federal student loans have fixed interest rates?

Yes. Federal Student Aid states that federal student-loan rates are fixed for the life of each loan once the loan is disbursed, although rates differ by loan type and disbursement date.

What is the federal undergraduate student-loan rate for 2026–27?

Current federal servicer guidance lists 6.52% for undergraduate Direct Subsidized and Direct Unsubsidized Loans first disbursed from July 1, 2026 through June 30, 2027. Rates change by disbursement period, so use the rate attached to your actual loan.

Can different federal student loans have different interest rates?

Yes. Loans disbursed in different academic years can carry different fixed rates.

What is accrued interest?

Accrued interest is interest that has accumulated but has not necessarily been added to principal.

What is capitalized interest?

Capitalized interest is unpaid interest that is added to principal under applicable rules, causing future interest to accrue on the larger principal balance.

Does unpaid interest always capitalize?

No. Accrued interest and capitalized interest are different. Capitalization occurs only under applicable loan-program or contractual rules.

Why does capitalization make a student loan more expensive?

Because future interest is calculated using a larger principal balance after eligible unpaid interest is added to principal.

Can I pay interest while I am in school?

Yes when permitted. Paying interest for which you are responsible can reduce unpaid accrued interest and potentially reduce later capitalization.

Do student loans have a grace period?

Many federal student loans have a six-month grace period after graduation, leaving school, or dropping below half-time, but not every federal loan type does.

Does interest accrue during the grace period?

It can. Borrower responsibility depends on loan type and applicable federal interest benefits.

Does grace period mean I do not owe interest?

No. Grace generally delays required repayment; it is not automatically an interest-free period.

What is the Standard Repayment Plan?

For eligible older federal loans, Standard Repayment generally uses fixed payments designed to repay the debt within up to 10 years, subject to applicable consolidation rules.

Are all federal loans still on a 10-year Standard Repayment Plan?

No. Federal repayment rules changed beginning July 1, 2026. Borrowers with qualifying newer Direct Loans can fall under the Tiered Standard Plan instead.

What is Tiered Standard Repayment?

It is a fixed-payment federal repayment structure for qualifying Direct Loans under the post-July 1, 2026 framework, with repayment periods tied to total outstanding principal.

How long is Tiered Standard Repayment?

Current servicer guidance lists maximum periods of 10 years below $25,000, 15 years from $25,000 to under $50,000, 20 years from $50,000 to under $100,000, and 25 years at $100,000 or more.

What is income-driven repayment?

Income-driven repayment calculates required federal payments using income and plan-specific rules rather than ordinary fixed amortization alone.

Can this calculator estimate RAP payments?

Use the Income-Driven Repayment Calculator for RAP and other current federal income-driven plan calculations because those payments require separate eligibility and income rules.

Is SAVE still available?

No. Current Federal Student Aid and federal servicer guidance state that the SAVE Plan ended in 2026 and affected borrowers must select another available repayment option.

Can I pay extra on student loans?

Generally yes, subject to the loan terms. Paying more than required can reduce principal faster and lower interest in ordinary repayment.

Does paying extra reduce student loan interest?

Yes when the extra payment reduces principal. Future interest then accrues on a smaller balance.

Should I pay the highest-rate student loan first?

When several loans have different rates and no forgiveness or special program changes the objective, directing extra repayment toward the highest-rate loan generally reduces interest fastest.

Can I consolidate federal student loans?

Eligible federal loans can be combined through Direct Consolidation, but consolidation can change repayment terms and can capitalize unpaid interest. Review the federal consequences before consolidating.

Is federal consolidation the same as refinancing?

No. Federal consolidation keeps eligible debt within the federal student-loan system. Private refinancing replaces loans with private credit.

Can I refinance federal student loans privately?

Yes if a private lender approves the refinance, but doing so generally removes the refinanced debt from federal repayment, forgiveness, discharge, and other federal benefit programs.

Should I refinance my student loans?

Compare the new rate, term, payment, and total interest with the federal or private protections being surrendered. Use the Student Loan Refinance Calculator.

Can private student loans have variable rates?

Yes. Private loan terms vary by lender and can include fixed or variable rates.

Are private student loans eligible for federal income-driven repayment?

No. Federal IDR plans apply to eligible federal loans, not ordinary private student loans.

Are private student loans eligible for federal forgiveness programs?

Ordinary private student loans are not federal student loans and generally do not receive federal forgiveness programs such as PSLF.

Should I use student loans to cover the entire college cost?

Borrowing should begin after grants, scholarships, savings, earnings, and other available resources are considered. Use the College Cost Calculator to identify the actual funding gap first.

What is the difference between this calculator and the College Cost Calculator?

The College Cost Calculator estimates what college costs and how much remains unfunded. This calculator models repayment after you decide how much to borrow.

What is the difference between student loans and Parent PLUS loans?

Student loans are borrowed by the student. Parent PLUS loans are federal loans legally borrowed by the parent. Use the Parent PLUS Loan Calculator for the parent obligation.

Can deferment or forbearance reduce my student-loan payment temporarily?

They can provide temporary payment relief for qualifying borrowers, but interest may continue accruing and federal program consequences can apply.

Does a lower monthly student-loan payment always save money?

No. A lower payment created by a longer repayment period can increase total interest because the balance remains outstanding longer.

How accurate is a student loan calculator?

It can provide strong planning estimates when principal, rate, interest-accrual assumptions, capitalization, and repayment term are accurate. Actual federal payments can differ because Direct Loans accrue interest daily and repayment-plan eligibility follows current federal rules.

Sources and review

Top 4 Questions: Direct Subsidized Loans vs. Direct Unsubsidized Loans — Federal Student Aid. Accessed 2026-08-31.
Financial Aid Dictionary: Top Terms Related to Grants, Work-Study, and Student Loans — Federal Student Aid. Accessed 2026-08-31.
Compare Repayment Plans With Our Repayment Calculator — Federal Student Aid. Accessed 2026-08-31.
Top FAQs About Income-Driven Repayment Plans — Federal Student Aid. Accessed 2026-08-31.
How To Prepare for Student Loan Payments — Federal Student Aid. Accessed 2026-08-31.
5 Things to Know Before Consolidating Federal Student Loans — Federal Student Aid. Accessed 2026-08-31.
Interest Rates for Federal Student Loans — Edfinancial Services — Federal Student Loan Servicer. Accessed 2026-08-31.
Payments, Interest, and Fees — Edfinancial Services — Federal Student Loan Servicer. Accessed 2026-08-31.
Repayment Plan Comparison — Edfinancial Services — Federal Student Loan Servicer. Accessed 2026-08-31.

Reviewed 2026-08-31 by Dr Akawak Ejigu, DBA.

Student loan estimate