Purchase and financing
Fixed-rate loan length, explained
The fixed-rate loan length is the number of years in the plan for paying back the home loan. A 30-year loan usually has 360 monthly payments. Fixed-rate means the interest rate does not change during the loan. Your property taxes, home insurance, and other home costs can still change.
Published and maintained by Kevin Song for Your Home Cost. Last reviewed: . How guides are reviewed.
7 cited sources
Why it changes your estimate
A shorter term spreads repayment over fewer months, so the principal-and-interest payment is usually higher, but total interest is usually lower. A longer term usually lowers that part of the monthly payment but keeps money borrowed longer, which generally increases total interest.
What to enter
Enter the exact term shown in the lender's offer. Fifteen, 20, and 30 years are common; choose one from the suggestion list or type another whole-year term. A loan term is not a promise to live in the home that long; selling, refinancing into a new loan, or paying the balance early can end it sooner.
Good to know
The Federal Housing Finance Agency (FHFA) benchmark is the count-weighted average original term for U.S. first-lien home-purchase mortgages in its National Mortgage Database, a nationally representative 5% sample. Count-weighted means each mortgage contributes as a loan rather than a large balance automatically counting more; original term means the repayment schedule when the loan began, not how long borrowers actually kept it. The Consumer Financial Protection Bureau (CFPB) separately says most homebuyers choose 30 years, compares that with 15 years, and notes that lenders may offer other terms. Those are national market context, not limits on an individual offer. Each term may carry a different rate. This calculator assumes a fully amortizing fixed-rate loan; it does not model an adjustable rate, balloon payment, or interest-only period. Taxes, insurance, and dues can still change, and the USDA guaranteed purchase program normally uses a 30-year fixed term.
Compare terms using real offers and household flexibility
Do not compare a 15-year payment at one rate with a 30-year payment at an assumed identical rate unless the exercise is explicitly a sensitivity test. Ask for term-specific quotes on the same day and include their points and fees. Then compare the required payment, cash to close, total scheduled interest, and the balance remaining after the number of years you realistically expect to keep the loan.
A shorter term commits the household to a larger required payment every month. Consider whether income variability, childcare, repairs, or other goals make that obligation uncomfortable even when the lifetime-interest figure looks attractive. Also ask whether the longer-term loan permits extra principal payments without a penalty; voluntary extra payments offer flexibility, but they do not turn the contractual payment into a shorter-term obligation or guarantee the same interest rate.
Read a repayment schedule as a record of debt, rather than the full cost of owning the home. Each monthly payment covers interest on the remaining balance and reduces principal with the rest. On this fixed-rate schedule, the required principal-and-interest payment stays the same until the final adjusted payment; the interest share falls as the balance shrinks. Property taxes, homeowners insurance, HOA dues, utilities, and maintenance remain separate expenses, including after the loan is paid off.
The example below assumes an extra $100 reaches principal with every monthly payment, starting with the first. Confirm the servicer's instructions for allocating extra money to principal and check any prepayment terms; CFPB says small extra-principal payments usually do not trigger a penalty, but borrowers should verify their loan's rules. These estimates assume no missed payments, fees, rate changes, refinancing, or payment recast. A lender's payoff quote can differ because of payment dates, interest accrual, and rounding.
- Obtain separate, same-day quotes for every term being considered.
- Compare the expected balance at the likely sale or refinance horizon, not only lifetime totals.
- Confirm prepayment terms and keep required-payment flexibility in the household budget.
- Check the first statement after an extra payment to confirm it reduced principal.
Worked example
For a $360,000 loan at 6.5%, the 30-year principal-and-interest payment is about $2,275 per month and lifetime interest is about $459,160 if every payment is made as scheduled. A 15-year term at the same rate is about $3,136 per month but about $204,478 in lifetime interest. Real offers may use different rates for different terms.
Sources and citations
These references support the definitions, planning guidance, and program rules above. A citation does not mean its publisher endorses this guide.
- Consumer Financial Protection Bureau: Compare loan terms
- U.S. Department of Agriculture: Guaranteed loan terms
- Federal Housing Finance Agency: Mortgage-term dashboard
- Federal Housing Finance Agency: Mortgage-term data feed
- Consumer Financial Protection Bureau: Mortgage-shopping guidance
- Consumer Financial Protection Bureau: How mortgage repayment works
- Consumer Financial Protection Bureau: Prepayment penalties
Original planning exercise
Follow a mortgage to payoff, with and without an extra $100
Hold the mortgage at $320,000 and the fixed note rate at 6.5%. First compare 15 and 30 years with scheduled monthly payments, then add $100 of principal to every 30-year payment starting in month one. Assume no fees, penalties, missed payments, or refinancing. These are planning estimates, not lender quotes; actual term-specific offers may use different rates.
Illustrative assumptions, not quotes or forecasts. Calculations by Your Home Cost; mortgage payment examples use the calculator's shared fixed-rate formula.
| Option or step | Calculation | Planning result |
|---|---|---|
| 30 years | 360 monthly payments, with the final payment adjusted | $2,022.62/month principal and interest; $408,140.64 estimated interest |
| 15 years | 180 monthly payments, with the final payment adjusted | $2,787.54/month principal and interest; $181,758.21 estimated interest |
| First 30-year payment | $2,022.62 = $1,733.33 interest + $289.29 principal | $319,710.71 remaining balance after payment |
| 30 years, plus $100/month | $2,022.62 required principal and interest + $100 extra principal | $2,122.62/month until the adjusted final payment; paid off in 314 months; $346,442.60 estimated interest |
| Extra-payment difference | Compare the two 30-year schedules over their actual repayment periods | 46 months earlier; $61,698.04 less interest |
What the comparison tells you
The 15-year term raises the required principal-and-interest payment by $764.92 a month. The first 30-year payment mostly covers interest because the balance is still large. Extra principal reduces that balance sooner, so later payments owe less interest. Adding $100 leaves the required principal-and-interest payment at $2,022.62; it shortens repayment instead of automatically lowering that required payment. The interest totals cover each full schedule, not a shorter period before a sale.
Evidence to collect
Ask for actual rate and fee offers for both terms. Confirm how the servicer applies extra principal and whether prepayment terms apply. Use the lender's schedule or payoff quote for the balance at a likely sale date; these estimates do not model daily interest or fees.
Apply it in the calculator
For this example, enter a $400,000 home price, $80,000 down payment, 6.5% interest, and 30 years. Open View your loan payoff and enter $100 in Extra monthly principal. Compare remaining balance, interest, and payoff time. Change Fixed-rate loan length to 15 for the separate term comparison.
Original planning exercise added . Exercise updated . Source-review dates above are maintained separately.