Finance calculator
Mortgage Amortization Calculator
Estimate mortgage amortization with monthly payment, balance at a selected year, full monthly and annual amortization tables, charts, payoff date, principal paid, interest paid, total interest, and optional extra principal payments.
Amortization schedule
See how mortgage balance, principal, and interest change over time
A mortgage amortization calculator shows the inside of the monthly payment. At the start of a fixed-rate mortgage, more of each payment usually goes to interest. Later, more of the same payment reduces principal.
Use the snapshot year to check common questions like balance after 5 years, principal paid after 10 years, or interest paid at a chosen point in the amortization schedule. Extra monthly principal can be included to see how prepayment changes the balance path.
This page supports mortgage calculator amortization, amortization schedule, amortization table, and amortization chart intent without pretending every lender schedule is identical. The result includes payoff date, total principal-and-interest payments, annual summaries, a full monthly table, principal-versus-interest chart, remaining-balance chart, snapshot period, principal paid, interest paid, and remaining balance.
For taxes, insurance, PMI, and HOA dues, use the main mortgage calculator. For payoff acceleration, use the mortgage payoff calculator.
Before using the result
- Use the mortgage principal and fixed annual rate from the same scenario.
- Set the snapshot year to the year you want to inspect.
- Include extra principal only if it will be applied to the loan balance.
- Use the lender's official schedule for contract-level balances.
Related tools
FormulaInterest = balance x monthly rate; principal paid = payment - interest
Formula
Amortization schedule step
Amortization output is an estimate. Use your lender's official amortization schedule for contract and servicing decisions.
Interest = balance x monthly rate; principal paid = payment - interest
Early payments usually carry more interest; later payments usually reduce principal faster.
SourcesThis calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
Sources and assumptions
Source notes
This calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
- Effective year
- Current rules
- Last verified
- 2026-06-18
Amortization output is an estimate. Use your lender's official amortization schedule for contract and servicing decisions.
Official and reference sources
Assumptions
- The mortgage is modeled as a fixed-rate, fully amortizing loan.
- Payments are made monthly and on schedule.
- Extra monthly principal is applied after scheduled interest for the month.
- The snapshot year shows estimated balance, principal paid, and interest paid up to that point.
- The full table uses the same fixed payment and extra-principal assumptions for every modeled month.
Not included
- Escrow, taxes, insurance, lender fees, rate changes, skipped payments, biweekly payment timing, and official lender servicing rules.
FAQ8 common questions for this calculator.
FAQs
What does a mortgage amortization calculator show?+
It shows how a fixed mortgage payment is split between interest and principal, plus the estimated balance at a selected year.
Can I check the mortgage balance after 5 years?+
Yes. Keep the snapshot year at 5 to estimate the remaining balance, principal paid, and interest paid after five years.
Does extra principal change the amortization schedule?+
Yes. Extra principal reduces the balance faster, which can lower future interest and shorten the loan.
Is this a full monthly amortization table?+
Yes. The page includes a full monthly amortization table, an annual summary table, a principal-versus-interest chart, and a remaining-balance chart.
Does the schedule include payoff date and total payments?+
Yes. The amortization schedule shows estimated payoff date, total principal-and-interest payments, total interest, and modeled payment count.
How does the Mortgage Amortization Calculator calculate the result?+
For the Mortgage Amortization Calculator, it uses the Amortization schedule step: Interest = balance x monthly rate; principal paid = payment - interest. Early payments usually carry more interest; later payments usually reduce principal faster.
What information do I need to use the Mortgage Amortization Calculator?+
Enter the money values, rates, dates, quantities, or assumptions requested by the form. Keep every amount in the same currency or business period before comparing the Mortgage Amortization Calculator result.
How accurate is the Mortgage Amortization Calculator?+
Mortgage Amortization Calculator is accurate for the rates, amounts, dates, and rules entered. It uses the Amortization schedule step shown on this page. Real products can differ because of fees, taxes, contract terms, or changing official thresholds.
RelatedNearby finance calculators for the next step after Mortgage Amortization Calculator.
Finance guide
How to use the Mortgage Amortization Calculator
Estimate mortgage amortization with monthly payment, balance at a selected year, full monthly and annual amortization tables, charts, payoff date, principal paid, interest paid, total interest, and optional extra principal payments. The page also explains the amortization schedule step and shows a practical example: Early payments usually carry more interest; later payments usually reduce principal faster.
- 1
Enter your details
Enter monthly payment, balance at a selected year, full monthly and annual amortization tables, charts, payoff date, principal paid, interest paid, total interest, and optional extra principal payments, then complete any other fields shown in the calculator.
- 2
Check the calculation
Review the result alongside the amortization schedule step: Interest = balance x monthly rate; principal paid = payment - interest.
- 3
Compare scenarios
Change one or more inputs to see how they affect the mortgage Amortization Calculator result before you use the estimate.