F
FreeFinCalc
Try Free

15-Year vs 30-Year Mortgage — Full Comparison

See the real cost difference between a 15-year and 30-year mortgage on any home price.

Loan Details

Home Price$400,000
Down Payment20%
15-Year Rate6%
30-Year Rate6.75%
Loan Amount: $320,000
15-Year Mortgage
Monthly Payment
$2,700/mo
Total Interest
$166,062
SAVES $261,123
VS
30-Year Mortgage
Monthly Payment
$2,076/mo
Total Interest
$427,185
+$625/mo

The Numbers

Monthly difference$625/mo more for 15-year
Total interest (15-year)$166,062
Total interest (30-year)$427,185
Total interest saved with 15-year$261,123

15 vs 30 Year Mortgage — Complete Guide

The Case for a 15-Year Mortgage

The 15-year mortgage is the wealth-building choice. You save a massive amount in interest — on this loan, $261,123 stays in your pocket instead of going to the bank. You also get a lower interest rate (typically 0.5-0.75% less), build equity twice as fast, and own your home free and clear in half the time.

The trade-off is a higher monthly payment — $625 more per month. This means less flexibility in your monthly budget. Financial advisors generally recommend the 15-year only if the payment is under 25% of your gross monthly income and you have a fully-funded emergency fund.

The Case for a 30-Year Mortgage

The 30-year mortgage offers lower monthly payments and greater financial flexibility. The extra $625/month could go toward retirement investing (which may earn more than your mortgage rate), emergency savings, or other financial goals. If invested at 7% over 30 years, that monthly difference could grow to a substantial sum.

The 30-year is also the safer choice during uncertain times. If you lose your job or face unexpected expenses, the lower required payment provides a bigger financial cushion. You can always make extra payments toward a 30-year mortgage when cash flow allows.

Related Calculators

Mortgage CalculatorAmortizationRefinance CalculatorHome AffordabilityExtra Payment

Frequently Asked Questions

Is a 15-year mortgage better than a 30-year?

A 15-year mortgage saves you a huge amount in total interest (often 50-60% less) and builds equity faster. However, the monthly payment is significantly higher (40-50% more). Choose 15-year if you can comfortably afford the higher payment without sacrificing emergency savings or retirement contributions.

How much do you save with a 15-year mortgage?

On a $320,000 loan, a 15-year at 6% vs 30-year at 6.75% saves approximately $261,123 in total interest. That is real money that stays in your pocket instead of going to the bank.

Why are 15-year rates lower than 30-year?

Lenders charge lower rates on 15-year mortgages because the shorter term means less risk. The bank gets its money back faster, reducing exposure to economic changes, defaults, and inflation. This rate discount (typically 0.5-0.75% lower) is an additional benefit on top of the shorter payoff period.

Can I get a 20 or 25-year mortgage instead?

Yes, some lenders offer 20 and 25-year terms as a middle ground. A 20-year mortgage typically has rates close to the 15-year rate with a lower monthly payment. However, these are less common and may require shopping around with multiple lenders.

Should I get a 30-year and make extra payments instead?

This is a popular strategy that gives you flexibility. You get the lower required payment of a 30-year but pay extra toward principal when possible. The downside is you get the higher 30-year rate, and most people do not consistently make extra payments. If you have the discipline, it works. If not, the 15-year forces the faster payoff.

Data & Research

State RankingsSalary DataFinancial by AgeMortgage DataInsurance DataCredit Card DataTax Brackets 2026Minimum Wage