15-Year vs 30-Year Mortgage Calculator

What is 15-Year vs 30-Year Mortgage Calculator?

Compare monthly payment and total interest for 15-year and 30-year mortgages.

• Estimate mortgage payments and real housing cost after taxes and insurance.
• Compare renting and buying over a multi-year horizon.
• Create an early estimate for down payment, budget, and affordability.

Scope and country basis

English pages are intended for English-speaking markets. Use the country/currency selector for United States, United Kingdom, Canada, Australia, or China where available.

Policy-sensitive results vary by jurisdiction. When a local rule is not implemented, the calculator uses your entered rates, deductions, premiums, or assumptions instead of pretending one country fits all.

What each input means

Loan amount

Money field, formatted in the selected currency.

Annual interest rate

Percentage field: enter 8 for 8%.

Formula and interpretation

The core formula is: Compare 15-year payment vs 30-year payment. If a country/currency selector is available, money is formatted for that market. Policy-sensitive fields use the selected market where implemented, otherwise they remain user-entered assumptions.

Use the result for first-pass comparison, budgeting, scenario planning, and discussion prep. Before filing taxes, applying for credit, buying insurance, or investing, verify the result against local rules, contracts, and professional advice.

Key concepts

Key inputs for this tool

15-Year vs 30-Year Mortgage Calculator mainly depends on Loan amount, Annual interest rate. Keep time period, currency, and definitions consistent before comparing outputs.

Total housing cost

Real ownership cost includes more than principal and interest.

Down payment and liquidity

Higher down payment lowers payment but uses cash reserves.

Holding period

Buy-versus-rent economics depend heavily on how long you stay.

How to read the result

• Read the core 15-Year vs 30-Year Mortgage Calculator output first, then the supporting metrics and scenarios rather than cherry-picking one favorable number.
• Place mortgage output inside household cash flow.
• Stress-test higher rates, lower income, and flat home value.
• Verify local policy, tax, insurance, and lending rules.

How to use it

1. Enter home price, down payment, rate, term, and housing-cost assumptions.
2. Review payment, total interest, affordability, or rent-vs-buy output.
3. Adjust down payment, term, rate, and holding period to compare household cash flow.
4. Before buying, verify local rules, taxes, insurance, and lender underwriting.

Common mistakes

• Looking only at mortgage payment.
• Assuming appreciation fixes every decision.
• Applying one country's mortgage rules everywhere.

Suggested workflow

1. Estimate basic payment.
2. Add taxes, insurance, and ownership costs.
3. Use affordability and rent-vs-buy tools for decision validation.

Method and review boundary

This calculator runs a local estimate from the inputs and formula shown on this page. It does not retrieve live rules, rates, underwriting decisions, or quotes from banks, tax authorities, insurers, or other providers. Last reviewed: July 24, 2026.

For tax, lending, insurance, retirement, investment, or contract decisions, verify official guidance, the relevant agreement, and a formal quote for your location. Use this result to compare scenarios and prepare questions, not as financial, tax, investment, or legal advice.

Method notes and official sources

The comparison uses the same user-entered fixed annual rate for both a fully amortizing 15-year and 30-year principal-and-interest loan. Actual 15-year and 30-year offers can have different rates and fees, and total housing payment can also include taxes, insurance, mortgage insurance, escrow, points, and other charges.

The page calculates locally from user-entered values. It does not connect to Shopify, Google, ad platforms, lenders, analytics systems, fuel-price feeds, or other providers, and the result is not an official quote, promise, forecast, approval, or live platform data. Currency selection changes formatting only and does not perform FX conversion.

• CFPB: Compare 15-year and 30-year mortgage terms - Consumer Financial Protection Bureau
• CFPB: Principal, interest, and total mortgage payment - Consumer Financial Protection Bureau
• CFPB: Loan Estimate explainer - Consumer Financial Protection Bureau

Sources checked July 27, 2026. These are government, regulatory, standards-body, or first-party product references. Laws, product rules, metric definitions, and official pages can change; verify the applicable authority, platform account, and contract documents before a formal decision.

FAQ