The term you choose for a fixed-rate mortgage sets two numbers at once: the payment you must make every month and the interest you pay before the home is yours. A 15-year loan has the higher payment and the smaller interest bill. A 30-year loan has the lower payment and costs far more over its life if you pay only what is required, but it generally leaves you free to pay it off faster, as long as your loan allows extra payments and has no prepayment penalty.
This guide compares the two terms on one hypothetical loan: the payment, the total interest, the balance after five and ten years, and what the higher payment does to your debt-to-income ratio. It then prices the middle path, a 30-year loan paid on a 15-year schedule, and covers the reasons to keep a lower required payment even when you can afford the higher one.
What to know
- A 15-year loan typically has a lower rate and a much higher payment, and it cuts total interest sharply.
- The higher payment raises your debt-to-income ratio and can lower the loan amount you qualify for.
- Paying a 30-year loan at the 15-year amount repays it years early and keeps the lower required payment, but it costs more interest than a true 15-year loan.
- Build emergency savings first, and do not count on refinancing into a shorter term later.
Where the two rates stand
Freddie Mac’s Primary Mortgage Market Survey put the average 30-year fixed rate at 7.03% and the average 15-year fixed rate at 6.42% for the week of September 24, 2026, a gap of 0.61 percentage points. These are weekly survey averages, not quotes. The rates a lender offers you can differ, and the CFPB notes that rates vary among lenders, especially for shorter terms.
The CFPB’s guide to loan options explains why shorter terms usually cost less overall. You borrow the money for less time, and the rate is usually lower, by as much as a full percentage point. The trade is a higher monthly payment. How much you save and how much more you pay each month depend on the specific rates you are offered, so request Loan Estimates for both terms from the same lender on the same day.
Sources: Freddie Mac: Mortgage rate survey archive · CFPB: Understand loan options
Payment and total interest on one hypothetical loan
Take a hypothetical $425,000 home bought with $85,000 down, leaving a $340,000 loan. The rates are illustrative, set near the survey averages rather than quoted by any lender: 7.00% for 30 years and 6.375% for 15 years. The 30-year principal-and-interest payment is $2,262.03. The 15-year payment is $2,938.45, or $676.42 more each month. Property taxes and insurance would be added to either.
Over the full term, the 30-year loan charges $474,330 of interest and the 15-year loan $188,921, a difference of $285,409. Most of that gap comes from time rather than the rate. At the same 7.00% rate, a 15-year loan would charge $210,083, so the shorter schedule alone saves $264,247 and the lower rate adds $21,162. That split matters when you weigh a 30-year loan paid on a faster schedule: the higher rate stays on the whole balance, so paying the same $2,938.45 captures most of the time savings but none of the rate savings. The table also shows that middle path, covered below: the 30-year loan paid at the 15-year amount.
| 30-year at 7.00% | 15-year at 6.375% | 30-year paid at the 15-year amount | |
|---|---|---|---|
| Monthly payment | $2,262.03 | $2,938.45 | $2,938.45 ($2,262.03 required) |
| Paid off in | 30 years | 15 years | 16 years, 2 months |
| Total interest | $474,330 | $188,921 | $227,750 |
| Balance after 5 years | $320,047 | $260,240 | $271,620 |
| Balance after 10 years | $291,762 | $150,631 | $174,684 |
Sources: CFPB: Understand loan options
How fast each loan builds equity
The CFPB explains that only the part of each payment that goes to principal reduces what you owe and builds equity, and that early in a loan most of the payment goes to interest because the balance is still high. That is why the two terms pull apart so quickly. After five years, the 30-year loan has repaid $19,953 of principal and the 15-year loan $79,760. After ten years, the figures are $48,238 and $189,369.
Leaving aside any change in the home’s value, your equity is the down payment plus the principal you have repaid, so if you sell after ten years, the 15-year loan leaves you $141,131 more equity. The balance rows in the table above show the same gap as the amount you would still owe. The 30-year loan paid at the 15-year amount pulls far ahead of the 30-year schedule but still trails the 15-year loan, by $24,053 of balance after ten years.
The higher payment and the loan you qualify for
Lenders look at your debt-to-income ratio, which the CFPB defines as all your monthly debt payments divided by your gross monthly income; different loan products and lenders set different limits. Fannie Mae’s Selling Guide counts the qualifying payment on the new mortgage in your total monthly obligations, so the term you choose moves the ratio directly.
Suppose your household earns $12,000 a month before taxes, pays $525 a month on a car loan, and expects $650 a month for property taxes and homeowners insurance. With the 30-year loan, the housing payment is $2,912.03 and your total debt-to-income ratio, counting the car loan, is 28.6%. With the 15-year loan, the payment is $3,588.45 and the ratio is 34.3%. Both would fit under a hypothetical 36% limit, but the room left is not the same. At that limit, with taxes and insurance still $650 and no mortgage insurance, $3,145.00 a month would be left for principal and interest, enough for about $472,717 on the 30-year terms but only $363,899 on the 15-year terms, a difference of $108,818.
The CFPB’s homebuying guide makes the same point from the budget side: the loan amount you can afford depends on how much you can pay back each month, and the kind of loan, such as a 30-year or 15-year fixed, changes the home price you can afford. Because qualification rests on the required payment, a 30-year loan you plan to pay down faster is judged on its lower payment.
Sources: CFPB: Debt-to-income ratio · Fannie Mae Selling Guide: B3-6-02, Debt-to-income ratios · CFPB: Decide how much you want to spend on a home
A 30-year loan paid like a 15-year loan
There is a middle path: take the 30-year loan and pay the 15-year amount anyway. In the example, paying $2,938.45 a month on the 30-year loan, $676.42 more than required, retires it in 16 years, 2 months with $227,750 of interest. That is $246,580 less than paying the 30-year loan on schedule, but $38,829 more than the true 15-year loan, and 14 months longer, because the whole balance carries a rate 0.625 percentage points higher.
What the $38,829 buys is the right to pay less. The required payment stays $2,262.03, so after a job change, a large repair, or a drop in income, you can fall back to it without asking anyone. The table shows what falling back costs. Paying the higher amount for five years and then only the required payment ends the loan in 22 years, 4 months; keeping it up for ten years ends it in 18 years, 7 months.
A voluntary payment is easy to pause and easy to forget, so automate the extra amount. The CFPB advises checking that your loan allows extra payments and that they are applied to principal rather than interest. After the first one, confirm that the principal fell by the full extra amount. The CFPB explains that servicers generally must send a statement each billing cycle showing how your payment was applied, but a coupon book takes its place and small servicers are exempt; in either case, ask the servicer to confirm.
| How you pay the 30-year loan | Paid off in | Total interest | More interest than the 15-year loan |
|---|---|---|---|
| The required $2,262.03 only | 30 years | $474,330 | $285,409 |
| $2,938.45 for 5 years, then $2,262.03 | 22 years, 4 months | $305,133 | $116,212 |
| $2,938.45 for 10 years, then $2,262.03 | 18 years, 7 months | $245,453 | $56,532 |
| $2,938.45 every month | 16 years, 2 months | $227,750 | $38,829 |
Sources: CFPB: Your mortgage servicer must comply with federal rules
Why the lower required payment can be worth keeping
When you work out how much cash to put into a purchase, the CFPB suggests setting aside money for other savings goals and then an emergency cushion; its rule of thumb is at least three to six months of expenses. It also reminds buyers not to forget retirement and other savings goals. That advice is about the cash you bring to closing, but the same priorities can guide how much of your monthly budget the mortgage takes. In the example, a 15-year loan commits $676.42 a month that could otherwise build emergency savings, go toward retirement, or pay down higher-rate debt.
One sensible order is to build the cushion first, then decide how much of the difference to send to principal. Buyers with steady income, solid reserves, and no higher-rate debt may prefer the 15-year loan’s lower rate and the discipline of a required payment. Buyers with variable income or a thin cushion may prefer the 30-year loan and a voluntary schedule they can pause. Neither choice is right for everyone, and a HUD-approved housing counselor can help you test the numbers against your budget.
Sources: CFPB: Determine your down payment
Other terms, and why not to count on refinancing
Fifteen and 30 years are not the only choices. The CFPB notes that you may be able to negotiate a different term with your lender, such as 20 years. Fannie Mae’s Selling Guide says it buys loans with original terms of up to 30 years, so 10-year and 20-year loans fall within the loan terms it accepts. Freddie Mac’s weekly survey publishes averages only for the 30-year and 15-year terms, so if a payment between the two appeals to you, ask lenders to quote the other terms directly.
Some buyers take a 30-year loan planning to refinance into a shorter one later. Freddie Mac notes that refinancing replaces your mortgage with a new loan, with a new term, rate, and payment, and that you can expect to spend 3% to 6% of the loan principal to do it. Rates may not be lower when you are ready. The CFPB’s handbook on adjustable-rate mortgages makes a related warning: you might not qualify to refinance if your home’s value falls or something unexpected, such as a job loss or medical costs, damages your finances. Paying a 30-year loan on a faster schedule starts the savings now and does not depend on a later approval.
Sources: CFPB: Shopping for a mortgage · Fannie Mae Selling Guide: B2-1.5-02, Loan eligibility (acceptable loan terms) · Freddie Mac: Mortgage rate survey archive · CFPB: Consumer handbook on adjustable-rate mortgages (PDF) · Freddie Mac: Planning to refinance
Price the flexibility before you choose
Ask a lender for Loan Estimates on both terms, with the same loan amount and discount points, on the same day. Subtract the payments, then run the 30-year loan at the 15-year payment in the extra payments calculator. In the example, the 15-year loan costs $676.42 more a month and saves $285,409 of interest; paying that amount voluntarily on the 30-year loan captures all but $38,829 of the savings while keeping a $2,262.03 required payment. Decide whether that flexibility is worth the difference to you.
Your next-step checklist
- Request Loan Estimates for 15-year and 30-year terms on the same day.
- Calculate your debt-to-income ratio with each required payment.
- Set your emergency savings target before committing to the higher payment.
- Price a 30-year loan paid at the 15-year amount, and what falling back would cost.
- Ask your servicer how extra payments are applied to principal.
- Ask lenders to quote a 20-year or 10-year term if neither payment fits.
Sources & further reading
Freddie Mac: Mortgage rate survey archive CFPB: Understand loan options CFPB: How paying down a mortgage works CFPB: Debt-to-income ratio Fannie Mae Selling Guide: B3-6-02, Debt-to-income ratios CFPB: Decide how much you want to spend on a home CFPB: Your mortgage servicer must comply with federal rules CFPB: Determine your down payment CFPB: Shopping for a mortgage Fannie Mae Selling Guide: B2-1.5-02, Loan eligibility (acceptable loan terms) CFPB: Consumer handbook on adjustable-rate mortgages (PDF) Freddie Mac: Planning to refinanceEducational information, not individualized financial, legal, or tax advice. Examples are hypothetical. Verify current terms directly with the provider.
