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Amortization schedule calculator
Enter the loan amount, rate, and term to get the monthly principal & interest payment — plus a year-by-year table showing how much of each year goes to principal, how much to interest, and what balance is left.
The short answer
Last updated: July 2026
An amortization schedule shows how each fixed loan payment splits between interest and principal over the term. The monthly payment is P × r(1+r)ⁿ ÷ ((1+r)ⁿ − 1), where r is the monthly rate and n the number of payments. A $320,000 loan at 6.5% for 30 years runs about $2,023 a month.
After the estimate:
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See where every payment goes.
Enter the loan amount, rate, and term to get the monthly principal & interest payment — and a year-by-year schedule of principal paid, interest paid, and the balance left.
Loan amount
$
Interest rate (APR)
6.50%
0%
12%
Loan term
30 yrs
5 yrs
40 yrs
Input-driven result
Your inputs
Formula
Result below
Monthly principal & interest
$2,023
Fixed payment over 30 years at 6.50% APR.
Total interest over the term
$408,142
On top of the $320,000 you borrowed.
Estimate based on your inputs. Not a promise of results.
Estimate only. It assumes a fixed rate and no extra payments, and covers principal & interest — taxes, insurance, and any escrow are separate.
How it works
How this tool works.
A mortgage payment looks like one flat number, but underneath it the mix shifts every month. Early on, most of the payment is interest on a large balance; as the balance shrinks, more of the same payment goes to principal. Seeing that shift laid out by year is the fastest way to understand why the first years of a loan build equity slowly and the last years build it fast.
This calculator takes the loan amount, interest rate, and term, computes the fixed monthly principal & interest payment, and simulates the loan month by month. It rolls the results into a compact year-by-year schedule — principal paid, interest paid, and the remaining balance — so you can see exactly where any year of the loan stands. It is arithmetic on your inputs, not a quote or an offer.
Make the result useful
Read the changing mix of each payment
Early payments on an amortizing loan generally contain more interest than principal. The schedule makes that allocation visible rather than treating every payment as the same kind of progress.
Use the original balance, rate, and term from loan documents. Escrow, taxes, and insurance belong in a cash budget but are not loan principal or interest.
Does it include escrow?
No. Escrow is separate from the principal-and-interest amortization.
Questions landlords ask
Questions about this tool and its limits.
Built by a landlord who's done every one of these jobs by hand.
Aptoria was built by an owner-operator managing a Brooklyn portfolio — the 11pm calls, the awkward rent texts, the April receipt-pile — not by a software team guessing at the problem.
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