Mortgage vs Refinance Calculator: Which Do You Need?
Understand when to use a mortgage calculator versus a refinance calculator, and how the two work together when you buy a home or restructure a loan.
A mortgage calculator answers the question you ask before buying: given this price, down payment, rate, and term, what will I pay each month and over the life of the loan? A refinance calculator answers the question you ask after owning: given my current balance and rate, would a new loan with different terms save me money?
The two calculations share the same amortization math but differ in framing. Purchase analysis starts from a price and builds a loan; refinance analysis starts from an existing loan and compares it against a replacement, which makes closing costs and break-even time central.
Mortgage Calculator
Estimate the monthly payment and total interest for a home purchase.
Open calculatorMortgage Refinance Calculator
Compare your current loan against a new one and find the break-even point.
Open calculatorWhich calculator should you use?
Use the mortgage calculator when…
- You are shopping for a home and comparing price points or down payments.
- You want to see how rate and term change the monthly payment on a purchase.
- You need an amortization schedule for a loan you have not taken yet.
Use the refinance calculator when…
- You already have a mortgage and rates have moved since you closed.
- You want to know how many months it takes for closing costs to pay for themselves.
- You are weighing a shorter term against a lower payment.
Frequently asked questions
Is refinancing just a new mortgage?
Mechanically yes — a refinance replaces your existing loan with a new amortizing loan. The difference is analytical: refinancing only makes sense if the savings outweigh the closing costs within the time you expect to keep the home.
What is a refinance break-even point?
The number of months until your cumulative payment savings equal the closing costs of the new loan. If you sell or pay off the loan before break-even, refinancing cost you money.