Amortization Schedule Calculator
Generate a full month-by-month loan amortization schedule.
Every loan payment splits between interest and principal, and that split shifts every month. This tool generates the complete month-by-month breakdown so you can see exactly where your money goes across the life of the loan.
Reading the schedule
In the early months, look at how much of your payment goes to interest versus principal — on a 30-year mortgage, it's common for well over half of each early payment to be interest alone. Scroll to the later months and you'll see that ratio flip, with principal dominating as the balance shrinks.
Using this to plan extra payments
If you're considering extra principal payments, the schedule shows you exactly how much interest you'd avoid by paying down the balance early — since every dollar of principal paid off stops accruing interest for every remaining month of the loan.
Frequently asked questions
Why does my real loan statement show slightly different numbers?
Small differences can come from exact day-count conventions, rounding, or fees your lender includes that this calculator doesn't model. It's accurate for planning purposes but treat your official loan statement as the source of truth.
Can I see the effect of an extra payment in a specific month?
This tool shows the standard schedule without extra payments — for modeling accelerated payoff, use our Loan Payoff Calculator or Mortgage Payoff Calculator, which factor in a consistent extra monthly amount.