Every mortgage note states a maturity date. The term is the number of months from the first payment to that date. On a fully amortizing loan, the payment is calculated so that, if the borrower pays exactly as scheduled, the balance reaches zero on the last payment. Change the term and the payment, the speed of principal reduction, and the total interest all change with it.
Fifteen-year and thirty-year fixed loans are the common terms. Some programs offer others, like 10, 20, or 25 years, and some lenders will write an odd term to match a borrower's goal. The term is part of the product. A 15-year quote is its own product, usually priced from a different rate sheet, and on some programs it carries different insurance.
The monthly payment on a fixed-rate loan comes from three inputs: the amount borrowed, the note rate, and the number of payments. Shorten the number of payments and each payment has to carry more principal. A 15-year payment is higher than a 30-year payment on the same loan amount, but it is less than double, because the interest charges shrink along with the balance. Over a shorter schedule, the balance falls faster, so interest is charged on a smaller balance for most of the loan's life.
That is also why total interest paid over a shorter term is much lower. The borrower is paying down principal more quickly and borrowing the money for less time. This article does not compute a payment or a total. Those numbers depend on a real rate and a real loan amount, and a sample would be stale and misleading.
Lenders and investors price loans by how long their money is expected to be out and how much rate risk comes with it. Shorter fixed terms are usually priced differently from 30-year fixed loans, and on a given day the 15-year rate is often lower. That pattern is common, but the size of the gap moves with the market, and a lender's rate sheet on the day of the lock is the only real answer.
When you compare terms, compare them with the same points or the same lender credit. A 30-year quote with a credit and a 15-year quote with points are measuring different things.
FHA's annual mortgage insurance premium table is split by term. On FHA loans endorsed on or after March 20, 2023, the annual mortgage insurance table splits terms of more than 15 years from terms of 15 years or less. Source: HUD Mortgagee Letter 2023-05.
That means the term choice on an FHA loan affects the premium the borrower pays as well as the principal-and-interest payment. HUD's table also uses loan-to-value and loan amount, and the duration of the premium depends on loan-to-value at origination. The full table is covered in the FHA mortgage insurance articles. The point here is that term reaches into more of the loan than the maturity date.
On conventional loans, private mortgage insurance pricing also considers the term on some rate cards, and a shorter term can reach the 80 percent and 78 percent Homeowners Protection Act thresholds sooner because principal falls faster.
The required payment on the term you choose is the payment the underwriter uses in the debt-to-income ratio. A borrower who qualifies comfortably on a 30-year payment may not qualify on the 15-year payment for the same loan. The underwriter does not count a plan to pay extra. It counts the payment the note requires.
That is one reason borrowers who want the discipline of a shorter term sometimes take the longer term and pay extra instead. The approval is based on the lower required payment, and the borrower decides each month whether to send more.
Paying extra principal on a longer term is optional. The shorter-term payment is required.
Fictional example: a buyer takes the longer term and plans to send extra principal when they can. The required payment stays the longer-term payment. The extra principal shortens the loan only if they send it. The shorter term forces the faster schedule and removes that flexibility. Neither payment is calculated here.
A few mechanics matter if you take this route:
The honest tradeoff is that the longer term carries a higher rate on many days, so a borrower who pays the longer loan off on a 15-year schedule will usually pay somewhat more interest than a borrower who took the 15-year note. In exchange, they keep the right to drop back to the lower required payment in a tight month.
Term and amortization are related words for different things. The term is the schedule length. Amortization is how each payment splits between interest and principal along the way. On most fixed-rate loans the amortization period and the term are the same. On some loans they differ. A balloon loan might amortize over 30 years and come due in a shorter term, leaving a large balance. An interest-only period postpones amortization. Standard agency owner-occupied loans are fully amortizing over their term, and federal qualified mortgage rules limit the term on a qualified mortgage to 30 years.
On a refinance, the new term starts over. An owner who is several years into a 30-year loan and refinances into a new 30-year loan has added years back to the schedule. The monthly payment may drop for two reasons: a lower rate, and spreading the remaining balance over more months. Both are real, but they are different benefits, and the second one adds interest over time.
A refinance can also go the other way. An owner can refinance a 30-year loan into a 20-year or 15-year loan to finish sooner. Some lenders will write a custom term that matches the years left on the old loan, so the payoff date stays the same while the rate changes.
The Loan Estimate for a refinance shows the new term on page one, and a useful comparison lays out the old loan's remaining months next to the new loan's months.
The Loan Estimate lists the loan term on page one, right under the loan amount. Page three shows the Total Interest Percentage, which is the total interest over the life of the loan as a percentage of the loan amount, assuming the borrower pays exactly as scheduled. Comparing that figure across two terms shows how much the schedule length changes total interest. The Closing Disclosure adds the Total of Payments, the sum of every scheduled payment of principal, interest, mortgage insurance, and loan costs over the term. Those two lines are the clearest place to see what the term choice does over the full life of the loan, without anyone building a spreadsheet.
There is no universally correct term. The right answer is the one that fits the borrower's cash flow and plan.
Fictional example: a Fort Worth couple qualifies comfortably on a 30-year payment but would be near the debt-to-income limit on a 15-year payment for the same loan. They choose the 30-year note and set up an automatic extra principal payment each month. Two years later a job change cuts their income for a few months, and they pause the extra payment without any default. When income recovers, they resume. The required payment never changed; the schedule they followed did.
If you later want a lower required payment without refinancing, see recasting. To change the term on an existing loan, see rate-and-term refinance.
If you want two or three terms laid side by side with the same pricing and your real budget, I can show you the required payment and how each balance falls over the years you expect to keep the loan. Book a call, or start an application.
Links checked Oct 21, 2026.
About the author: McKade Lively, NMLS 2704474, American Pacific Mortgage Corporation dba True North Home Loans, NMLS 1850.
Equal Housing Opportunity.
Last reviewed: Oct 2026