Housing guide

15-Year vs. 30-Year Mortgage: Which Is Better?

How the loan term changes your monthly payment, the interest you pay, and your flexibility, with a worked example and a comparison you can run on your own numbers.

Published October 15, 2026

A 15-year mortgage and a 30-year mortgage can lend exactly the same amount. What differs is how long you take to repay it, and that one choice shapes the rest: the required monthly payment, the interest you pay over the life of the loan, and how much room your budget keeps each month.

A shorter term spreads the principal over half as many payments, so each payment is larger. Because the balance falls much faster, far less interest builds up. A longer term keeps the required payment lower and leaves more of your income free each month, at the cost of paying interest for twice as long.

This guide puts numbers on that trade-off, describes when each term can fit, and lets you compare both terms for your own loan amount and interest rate.

Quick answer

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

Neither is better for everyone. A 15-year mortgage generally requires a higher monthly payment but can substantially reduce the total interest you pay. A 30-year mortgage typically requires a lower monthly payment and gives you more flexibility, but it usually costs more interest over the life of the loan.

The right fit depends on your income, your other expenses and savings, your financial goals, and how comfortable you are with a larger fixed payment. This guide explains the trade-off in general terms; it is not personalized financial advice.

In this guide's example, $300,000 at 6.00% on both terms, the 15-year payment is $732.92 higher each month and the total interest is $191,832.65 lower.

Example: $300,000 over 15 and 30 years

The same loan amount at the same hypothetical 6.00% interest rate, so only the term changes. Calculated by Calcora's amortization engine, the same way as the comparison further down.

Loan amount, interest rate, loan term, monthly principal and interest, total interest, and total payments for $300,000 over 15 and 30 years at 6.00%
Metric	15-year mortgage	30-year mortgage
Loan amount	$300,000.00	$300,000.00
Interest rate	6.00%	6.00%
Loan term	180 months	360 months
Monthly principal & interest	$2,531.57	$1,798.65
Total interest	$155,682.79	$347,515.44
Total payments	$455,682.79	$647,515.44

The 15-year payment is $732.92 higher each month. In exchange, the loan is repaid in half the time and its total interest is $191,832.65 lower: $155,682.79 instead of $347,515.44.

Principal and interest over the life of each loan

Both loans repay the same principal. The difference in what they cost is interest.

Principal
Interest

15-year mortgage: Total payments $455,682.79; Principal $300,000.00Interest $155,682.79
30-year mortgage: Total payments $647,515.44; Principal $300,000.00Interest $347,515.44

Total payments are $455,682.79 on the 15-year mortgage and $647,515.44 on the 30-year mortgage. Both repay the same $300,000.00 of principal; the rest is interest: $155,682.79 and $347,515.44.

The 6.00% interest rate is hypothetical, not a current market quote, and both terms use it so the comparison shows the effect of the term alone. Actual 15-year and 30-year mortgage offers often have different rates, usually lower for the 15-year loan; the comparison below accepts a different rate for each term.

These are principal and interest only. They exclude property taxes, homeowners insurance, mortgage insurance, HOA fees, and other housing costs, which would be paid on top of either loan.

Each payment is rounded to the cent and each month's interest is rounded half up, as in every Calcora loan calculation. The final payment absorbs the rounding, so total payments are not exactly the monthly payment times the number of payments.

When a 15-year mortgage may make sense

A 15-year term can fit when the larger payment sits comfortably within your budget and paying the loan off sooner matters to you. It may make sense if:

The higher monthly payment still leaves room for your other bills, your savings, and the unexpected.
You want to be free of mortgage debt sooner, for example before retirement or before another large expense.
Paying less interest over the life of the loan matters more to you than keeping the required payment as low as possible.
Your emergency fund and other long-term savings goals are already on track, so putting more money into the home each month does not crowd them out.
You prefer a shorter repayment period: from the first payment, more of each payment goes to principal, so you build equity faster.

The trade-off is flexibility. A higher required payment is harder to keep up if your income drops or your expenses rise, and money paid into a home is not easy to get back without selling or borrowing against it.

When a 30-year mortgage may make sense

A 30-year term can fit when a lower required payment and room to adjust matter more than repaying the loan quickly. It may make sense if:

The lower required monthly payment fits your budget with a comfortable margin.
You value cash flow flexibility: you can pay extra when you choose to, but only the lower payment is required.
Building or keeping an emergency fund is a priority, and a smaller payment leaves more room to save.
You have other financial priorities, such as paying down higher-interest debt or saving for retirement.
Your income varies from month to month, as with commission, seasonal, or self-employment income, and a lower fixed payment eases the leaner months.

The trade-off is cost. At the same rate, the 30-year mortgage in the example above has $191,832.65 more interest than the 15-year mortgage, and its payments last twice as long.

Can you pay off a 30-year mortgage early?

Often, yes. Many mortgages allow additional payments toward principal. Each extra dollar reduces the balance, so less interest builds up the next month and every month after, and the loan ends sooner.

In the example above, paying $2,531.57 a month on the 30-year loan, $732.92 more than required, would repay it in 181 payments, the last one $0.19. Its interest would be $155,682.79, $191,832.65 less than with the required payment alone.

The difference from a 15-year mortgage is that the extra amount is optional: in a tight month you could pay the required $1,798.65 instead. A 15-year mortgage requires its higher payment every month, but its rate is often lower, and a 30-year loan paid off early keeps the 30-year rate.

Before paying extra, check your loan's terms with your lender or servicer:

How extra payments are applied. Ask for additional amounts to go to principal, rather than being held or applied to future payments.
Prepayment penalties. Some loans charge a fee for paying off a large part of the balance early, usually only in the first few years. Many mortgages have none, but your loan documents decide.
Any limits or procedures, such as a minimum extra amount or a specific way to send or label extra payments.

To see how a regular extra payment would change your own mortgage, enter it as extra principal in the Mortgage Calculator. The Amortization Calculator shows how each payment splits between principal and interest over the life of a loan.

Frequently asked questions

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

In total interest, usually yes: the balance is repaid in half the time, so much less interest builds up. In this guide's example, $300,000 at 6.00%, the 15-year mortgage has $155,682.79 of interest and the 30-year mortgage $347,515.44. Month to month, though, the 15-year payment is higher.

Why are 15-year mortgage payments higher?

The same principal is repaid in 180 payments instead of 360, so each payment has to cover a larger share of the balance. The lower interest does not make up for that: in the example, the payment is $2,531.57 a month on the 15-year mortgage and $1,798.65 on the 30-year mortgage.

Do 15-year mortgages have lower interest rates?

Often, yes. Lenders commonly offer lower rates on 15-year fixed-rate mortgages than on 30-year ones, partly because a shorter loan carries less risk for the lender. The gap varies by lender, borrower, and market conditions, so compare actual offers. This guide's example uses one rate for both terms to show the effect of the term alone.

Can I pay off a 30-year mortgage in 15 years?

If your loan allows extra principal payments, yes. At the same rate, paying the 15-year payment every month repays the 30-year loan in about 15 years: 181 payments in the example, the last one $0.19. Because 30-year rates are often higher than 15-year rates, this usually costs somewhat more interest than a 15-year mortgage would. Check your loan for prepayment penalties first.

Is a 30-year mortgage better for first-time homebuyers?

Not necessarily. Many first-time buyers choose a 30-year term because the lower required payment can make buying possible sooner and leaves room for moving costs, repairs, and an emergency fund. Others have room in their budget for a 15-year payment. The choice depends on your budget and goals more than on whether it is your first home.

How much interest can I save with a 15-year mortgage?

It depends on the loan amount and the two rates. In this guide's example, $300,000 at 6.00% on both terms, the 15-year mortgage has $191,832.65 less total interest. With a lower 15-year rate, the difference would be larger. The comparison on this page works it out for your own numbers.

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