Mortgage & Loan Payment Calculators
8 tools in this collection — free, instant, and private in your browser.
A mortgage is likely the largest debt most people will ever carry, and small differences in loan structure can translate into tens of thousands of dollars over the life of a loan. Mortgage and loan payment calculators let you explore these structures side by side before committing, revealing hidden costs and trade-offs that are easy to miss in a lender's summary sheet.
The foundational tool in this group is the PITI Calculator, which adds together Principal, Interest, Taxes, and Insurance to give you the true all-in monthly housing payment rather than just the loan payment. Lenders use this figure to assess affordability, and it is the number that actually matters for your monthly budget. Building from there, the Mortgage Points Breakeven Calculator helps you decide whether paying upfront discount points to lower your interest rate is worthwhile based on how long you plan to stay in the home.
Several calculators address specific loan structures worth understanding before signing. The Interest-Only Mortgage Calculator shows what your payments look like during the interest-only period and what they jump to when principal repayment begins — a transition that catches many borrowers off guard. The Balloon Loan Calculator models loans where a large lump sum is due at the end of a shorter term, common in commercial real estate and some non-traditional residential products. The HELOC Payment Calculator handles home equity lines of credit, which have variable rates and separate draw and repayment periods.
Payoff and savings tools round out the group. The Biweekly Mortgage Payment Calculator demonstrates how splitting your monthly payment in half and paying every two weeks results in one extra payment per year, cutting years off a 30-year mortgage and saving significant interest. The Loan Payoff Time Calculator solves for how long it takes to retire a debt given extra monthly payments. The Mortgage Recast Calculator models a lump-sum principal reduction that lowers future monthly payments without refinancing — a useful option when you come into a windfall.
- Start with PITI to understand true monthly cost before comparing loan options.
- Use Mortgage Points Breakeven before deciding whether to buy down your rate.
- Use Biweekly Payment or Loan Payoff Time calculators to see how extra payments reduce your total interest cost.
Rates, points, and fees change daily. Use these calculators with current quotes from your lender for realistic projections, and factor in your expected time in the home when comparing loan structures.
All mortgage & loan payment calculators
All calculator tools →Compare these tools
| Tool | What it does |
|---|---|
| Balloon Loan Calculator | Calculate the monthly payment and the lump-sum balloon balance due at the end of a balloon loan amortized over a longer schedule. |
| Biweekly Mortgage Payment Calculator | See how paying half your mortgage payment every two weeks (26 payments a year) shortens your loan and slashes total interest. |
| HELOC Payment Calculator | Estimate your home equity line of credit payment in both the interest-only draw period and the amortizing repayment period. |
| Interest-Only Mortgage Calculator | Calculate the monthly payment on an interest-only mortgage and compare it to the fully amortizing principal-and-interest payment. |
| Loan Payoff Time Calculator | Find out how many months it takes to pay off a loan or credit-card balance at a fixed monthly payment, plus total interest paid. |
| Mortgage Points Breakeven Calculator | Find out how long it takes for the monthly savings from buying mortgage discount points to repay their upfront cost. |
| Mortgage Recast Calculator | See your new lower monthly payment after recasting — applying a lump sum to principal and re-amortizing over the remaining term. |
| PITI Calculator | Calculate your full monthly housing payment: principal and interest plus property tax, homeowners insurance, and optional PMI. |
Frequently asked questions
- Should I pay mortgage points to get a lower interest rate?
- It depends on your breakeven horizon. The Mortgage Points Breakeven Calculator divides the upfront cost of the points by the monthly savings from the lower rate to show how many months it takes to recoup the expense. If you plan to stay in the home longer than the breakeven period, paying points saves money. If you might sell or refinance before then, paying points is likely not worthwhile.
- What is a mortgage recast and how does it differ from refinancing?
- A recast (also called reamortization) lets you make a large lump-sum payment toward principal and have the lender recalculate your monthly payment over the remaining loan term at your existing interest rate. Unlike refinancing, there are no closing costs, your rate stays the same, and the process is typically simple and inexpensive. It is ideal when you have received a windfall and want lower monthly payments without starting a new loan.
- How much interest does a biweekly payment schedule actually save?
- On a 30-year, 7% fixed mortgage, switching to biweekly payments typically pays off the loan about four years early and saves roughly $50,000 to $80,000 in interest on a $300,000 loan, depending on the rate. The savings come from making the equivalent of 13 monthly payments per year instead of 12, with each extra payment applied directly to principal.