Standard mortgage terms are 15, 20, or 30 years, with 30 years being the most common

A mortgage is a loan secured by the house itself, and the term is how long you have to repay it. The most common mortgage term in the United States is 30 years. A 15-year mortgage is shorter and costs less in total interest but has higher monthly payments. A 20-year mortgage sits between them. Some lenders offer 10-year, 25-year, or 40-year terms, but these are less common and may carry different rates or restrictions.

The term you choose affects two things: your monthly payment and the total amount of interest you pay over the life of the loan. A 30-year mortgage spreads the debt across more months, so each payment is smaller. A 15-year mortgage compresses the same loan into half the time, so payments are larger but you pay far less interest overall.

Your choice of term does not lock you in forever. You can pay off the mortgage early, refinance into a different term, or sell the house and use the proceeds to settle the loan. The term is simply the timeline the lender expects you to follow if you make only the required monthly payment.

Key Takeaways

  • A 30-year mortgage is the standard in the United States, though 15-year and 20-year terms are also widely available.
  • Shorter terms mean higher monthly payments but significantly less total interest paid over the life of the loan.
  • The interest rate you receive may vary depending on the term you choose — shorter terms often come with lower rates.
  • You can pay off a mortgage early, refinance into a different term, or sell the house without being bound to the full term.
  • The first several years of payments go mostly toward interest rather than principal, so early payoff saves the most money.

How the 30-year mortgage became standard

The 30-year mortgage became the default in the United States during the Great Depression, when the Federal Housing Administration (FHA) began insuring mortgages with longer terms to make homeownership more affordable. Before that, mortgages were often 5 to 10 years with a large balloon payment due at the end. The longer term made monthly payments manageable for working families.

That structure stuck. Today, when you shop for a mortgage without specifying a term, lenders assume you mean 30 years. It is the term most people can afford, and it is what most real estate agents and mortgage brokers lead with first.

What a shorter term costs you each month

A 15-year mortgage requires a substantially higher monthly payment than a 30-year mortgage on the same loan amount and interest rate. For example, on a $300,000 loan at 7 percent interest, a 30-year mortgage costs roughly $1,996 per month, while a 15-year mortgage costs roughly $2,797 per month — about $800 more each month.

The trade-off is interest paid. Over 30 years, you pay roughly $418,000 in total (principal plus interest). Over 15 years, you pay roughly $203,000 in total. The difference is about $215,000 in interest savings, but only if you can afford the higher monthly payment without strain.

Not everyone can absorb that increase. If the higher payment would force you to cut back on retirement savings, emergency funds, or other financial goals, the 30-year term may be the better choice for your situation, even though you pay more interest overall.

Interest rates often differ by term length

Lenders typically offer a lower interest rate on a 15-year mortgage than on a 30-year mortgage. The difference is usually between 0.25 and 0.5 percentage points, though it varies by lender and market conditions. A lower rate on a shorter term reflects the lender's lower risk — you are repaying the loan faster, so the lender has less time to worry about your circumstances changing.

This rate advantage makes the 15-year mortgage even more attractive from an interest-savings perspective, but it does not change the fact that the monthly payment is still much higher. When comparing terms, always look at both the rate and the resulting monthly payment, not just the rate alone.

How much of each payment goes to interest versus principal

In the early years of any mortgage, most of your monthly payment covers interest, not the loan balance. This is called amortization. On a 30-year mortgage at 7 percent, your first payment might be split roughly $1,750 in interest and $246 in principal. By year 15, the split shifts — you might pay $900 in interest and $1,096 in principal. By year 25, interest is only $200 and principal is $1,796.

This front-loaded interest structure means that paying off a mortgage early saves the most money in the first half of the term. If you pay an extra $100 toward principal each month from the start, you shorten the loan by several years and avoid years of interest payments at the end.

A 15-year mortgage has the same amortization structure, but compressed. You reach the point where principal dominates much faster, so you build equity in the house more quickly.

Refinancing can change your term mid-loan

You do not have to stick with your original term. Refinancing means taking out a new mortgage to pay off the old one, usually at a different rate or term. If interest rates drop, you might refinance into a new 30-year mortgage at a lower rate, which lowers your monthly payment. If you want to pay off the house faster, you might refinance from a 30-year into a 15-year mortgage.

Refinancing has costs — typically between 2 and 5 percent of the loan balance in fees and closing costs. You break even on those costs only if you stay in the house long enough for the savings to add up. A mortgage calculator can show you the break-even point for any refinance scenario you are considering.

Paying extra toward principal shortens the term

You can shorten your mortgage without refinancing by paying extra toward principal each month. Even an extra $50 or $100 per payment adds up over time. Some people make bi-weekly payments instead of monthly payments, which results in one extra payment per year and can cut years off a 30-year mortgage.

Before you commit to extra payments, make sure you have a fully funded emergency fund and are saving adequately for retirement. Paying down a mortgage early is a good use of extra money, but not if it leaves you vulnerable to a job loss or unexpected expense.

Frequently Asked Questions

Can I get a mortgage term longer than 30 years?

Some lenders offer 40-year mortgages, usually on jumbo loans (very large amounts) or in specific markets. A 40-year term lowers the monthly payment further but increases total interest paid significantly. These mortgages are less common and may come with higher rates or stricter requirements.

What happens if I sell the house before the mortgage term ends?

When you sell, the proceeds from the sale go first to pay off the remaining loan balance. You keep any money left over after the lender is paid and closing costs are deducted. There is no penalty for paying off the mortgage early through a sale.

Does a shorter mortgage term affect my credit score?

The term itself does not affect your score. What matters is whether you make payments on time. A 15-year mortgage and a 30-year mortgage have the same impact on your credit as long as you pay both on schedule.

Is it better to choose a 15-year or 30-year mortgage?

It depends on your budget and priorities. A 15-year mortgage saves substantial interest and builds home equity faster, but requires a much higher monthly payment. A 30-year mortgage is more affordable month-to-month and leaves room for other savings goals. Neither is universally "better" — the right choice is the one you can sustain without financial strain.

Can I change my mortgage term after I have already locked in a rate?

You cannot change the term of your existing mortgage without refinancing, which means applying for a new loan and going through underwriting again. Refinancing resets your rate and term, but comes with closing costs. It makes sense only if the new rate or term saves you enough money to cover those costs.