15-Year vs 30-Year Mortgage: Complete Comparison Guide

Choosing between a 15-year and 30-year mortgage is one of the most consequential financial decisions you will make when buying a home. The loan term you select affects not just your monthly budget but the total amount you pay for your home over decades. This guide breaks down the numbers, trade-offs, and decision framework so you can choose confidently.

Last updated: February 2026

How Loan Term Affects Your Payments

The fundamental difference is simple: a 15-year mortgage requires you to repay the loan in half the time, which means each monthly payment is significantly higher. However, because you are borrowing the money for fewer years, you pay far less in total interest. Lenders typically offer lower interest rates on 15-year loans as well — often 0.5% to 0.75% less than the 30-year rate — because the shorter term represents less risk.

Side-by-Side Payment Comparison

Here is how the two terms compare on a $350,000 loan amount at current market rates:

Factor	15-Year (6.0%)	30-Year (6.5%)
Monthly Payment	$2,954	$2,212
Total Paid Over Life of Loan	$531,720	$796,320
Total Interest Paid	$181,720	$446,320
Interest Savings	$264,600 saved with 15-year
Equity After 5 Years	~$130,000	~$48,000

The numbers are striking. With the 15-year mortgage, you pay $742 more per month but save over $264,000 in interest and own your home outright in half the time. You also build equity much faster because a larger portion of each payment goes toward the principal from day one.

The Total Interest Savings Over Time

Most homeowners focus on the monthly payment, but the total interest cost reveals the true price of each option. On a $350,000 loan, the 30-year borrower pays more in interest alone ($446,320) than the original home price. The 15-year borrower pays roughly $181,720 in interest — less than half.

The difference is even more dramatic at higher loan amounts. On a $500,000 mortgage, a 15-year term at 6.0% results in approximately $259,000 in total interest, compared to $637,000 on a 30-year term at 6.5%. That is a savings of nearly $378,000 — enough to fund a significant retirement portfolio.

Who Should Choose a 15-Year Mortgage

A 15-year mortgage is ideal if you:

• Have stable, high income that comfortably covers the higher payment without stretching your budget
• Want to be debt-free faster and value the peace of mind of owning your home outright
• Are approaching retirement and want to eliminate housing costs before leaving the workforce
• Have an emergency fund covering 6+ months of expenses, including the higher mortgage payment
• Are not confident in beating the mortgage rate through investing the difference

Who Should Choose a 30-Year Mortgage

A 30-year mortgage may be the better choice if you:

• Need lower monthly payments to stay within the recommended 28% of gross income housing expense ratio
• Want to invest the difference — the $742/month saved could grow to over $400,000 in 30 years at 8% average returns
• Value flexibility — you can always make extra payments on a 30-year loan to simulate a 15-year payoff
• Have other high-interest debt that should be paid off first
• Are early in your career with rising income expected and want payment flexibility now

The Hybrid Strategy: 30-Year with Extra Payments

Many financial advisors recommend a middle-ground approach: take the 30-year mortgage for its lower required payment, then make extra principal payments when you can. This gives you the safety net of a lower minimum payment during tough months while still allowing you to pay off the loan faster when finances are strong.

For example, paying an extra $300/month on a 30-year mortgage at 6.5% would reduce the payoff time from 30 years to approximately 22 years and save over $160,000 in interest. You get most of the benefit of the 15-year term without the mandatory higher payment.

Break-Even Analysis: When Does the 15-Year Win?

The break-even point depends on what you do with the monthly savings from a 30-year mortgage. If you simply spend the difference, the 15-year mortgage wins immediately. If you invest the $742/month difference in the stock market at an average 8% annual return, the invested amount could grow to approximately $1.02 million over 30 years. However, you would also have paid $264,000 more in mortgage interest.

In most realistic scenarios, the 15-year mortgage provides a guaranteed return equal to the interest rate (6.0%), while investing offers a potentially higher but uncertain return. If your mortgage rate is above 6%, the guaranteed savings of the 15-year term become even more compelling.

Tax Considerations

Under current tax law, you can deduct mortgage interest on loans up to $750,000. The 30-year mortgage generates more deductible interest, which reduces the effective cost difference. However, many homeowners take the standard deduction ($29,200 for married filing jointly in 2025) and receive no tax benefit from mortgage interest. Do not let the tax tail wag the financial dog — the deduction reduces your interest cost but does not eliminate it.

Key Decision Factors Summary

Decision Factor	15-Year	30-Year
Best for aggressive savers	✓
Best for cash flow flexibility		✓
Best for pre-retirees	✓
Best for investors		✓
Lowest total cost	✓
Built-in safety net		✓

Run Your Own Numbers

Every situation is unique. Use our Mortgage Calculator to compare 15-year and 30-year payments with your specific loan amount, interest rate, and down payment. You can also use the Home Loan Prepayment Calculator to see how extra payments on a 30-year loan can narrow the gap.

Want to see if you qualify for the home you want? Check our Home Affordability Calculator to determine your maximum budget based on income and debts.

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Calculate your payments with our Mortgage Calculator. See how extra payments reduce interest with the Home Loan Prepayment Calculator. Determine your budget with the Home Affordability Calculator.