15-Year vs. 30-Year Mortgage: How to Compare

Updated October 10, 2026

By Stacy Schlesinger | President, Platinum Lending Solutions | NMLS #252075

When choosing a mortgage, one of the decisions you’ll make is how long you want to take to repay the loan.

Two common options are the 15-year and 30-year fixed-rate mortgages. Both offer predictable principal and interest payments, but they can have very different effects on your monthly budget and long-term financing costs.

A 15-year mortgage typically offers a lower interest rate and allows you to pay off your home sooner, but it comes with a higher required monthly payment.

A 30-year mortgage generally provides a lower monthly payment, giving you more flexibility in your household budget, but you’ll typically pay more interest over the life of the loan.

Neither option is automatically the right choice for everyone. The important thing is understanding how each fits your income, financial priorities, and longer-term plans.

What’s the Difference Between a 15-Year and 30-Year Mortgage?

The primary difference is the length of time you have to repay the loan.

With a 15-year mortgage, your payments are calculated to repay the loan over 180 months. A 30-year mortgage spreads repayment over 360 months.

For a fully amortizing fixed-rate loan, your principal and interest payment remains consistent throughout the loan term, assuming you make your scheduled payments.

Here’s how the two typically compare:

Feature	15-Year Mortgage	30-Year Mortgage
Repayment period	15 years	30 years
Monthly principal and interest	Higher	Lower
Interest rate	Typically lower	Typically higher
Total scheduled interest	Generally less	Generally more
Principal repayment	Faster	Slower
Monthly budget flexibility	Less	More

Actual interest rates, loan costs, and eligibility requirements vary. The comparison assumes similar loan amounts and conventional, fully amortizing fixed-rate financing.

How Does the Mortgage Term Affect Your Monthly Payment?

When you borrow the same amount of money over 15 years instead of 30, you’re repaying the principal over a much shorter period.

That generally means a higher required monthly payment.

For example, a buyer who qualifies for a 30-year mortgage might find the monthly principal and interest payment manageable, while the payment on a 15-year loan for the same amount could stretch their budget.

It’s also important to remember that principal and interest aren’t your only housing expenses.

Your total monthly housing cost may include property taxes, homeowners insurance, mortgage insurance, and applicable HOA dues.

Consider someone comparing homes in Beaverton, Oregon, and Vancouver, Washington.

Even if the mortgage amounts are similar, the properties may have different taxes, insurance expenses, or association fees. Those differences can affect whether the higher required payment on a 15-year mortgage fits the buyer’s budget.

My advice: Compare the complete estimated housing payment under both loan terms before making a decision.

For more information, see our article on how mortgage rates affect homebuying power.

Why Does a 15-Year Mortgage Usually Cost Less in Interest?

One of the primary advantages of a 15-year mortgage is the potential to save a substantial amount of interest over the life of the loan.

There are two reasons for this.

First, you’re borrowing money for a shorter period. Because the loan is repaid sooner, interest has less time to accumulate.

Second, lenders often offer lower interest rates on 15-year mortgages than on comparable 30-year loans.

However, the actual difference depends on the rates and terms available when you apply.

A 15-year mortgage generally allows you to repay principal faster, increasing your ownership equity through loan repayment more quickly.

Keep in mind that your home’s total equity also depends on its market value, which can rise or fall over time.

For additional guidance on comparing mortgage terms, visit the Consumer Financial Protection Bureau’s explanation of loan options.

Why Do Many Homebuyers Choose a 30-Year Mortgage?

The primary advantage of a 30-year mortgage is the lower required monthly payment.

For many households, that flexibility is valuable.

A lower mortgage payment may leave additional money available for other priorities, such as:

• Maintaining emergency savings
• Contributing toward retirement
• Paying down other debts
• Preparing for home maintenance and repairs
• Managing childcare, education, or other family expenses

A 30-year mortgage can also provide greater flexibility if household income changes or an unexpected expense arises.

However, choosing a longer loan term means the mortgage balance generally decreases more slowly and the total scheduled interest is typically higher.

The decision comes down to how you balance monthly affordability against the cost of carrying the mortgage over time.

Can You Pay Off a 30-Year Mortgage in 15 Years?

Potentially, yes.

Many mortgage programs allow borrowers to make additional principal payments without a prepayment penalty.

If your loan permits it, paying extra toward principal can reduce your outstanding balance, shorten the repayment period, and lower your total interest expense.

This creates an option worth considering.

You could choose a 30-year mortgage for its lower required payment and make additional principal payments when your budget allows.

For example, you might contribute extra toward your mortgage during months when your income or savings are higher, while retaining the flexibility to make only the required payment during other months.

There are a few important considerations.

First, check your loan terms. Verify whether a prepayment penalty applies and how additional principal payments are processed.

Second, compare interest rates. A 30-year mortgage with extra principal payments won’t necessarily produce the same total interest expense as a 15-year mortgage with a lower interest rate.

Finally, be realistic about your plans. Making extra payments requires consistency. If your intention is to pay off the mortgage early, evaluate whether that approach fits your other financial priorities.

The flexibility of a 30-year mortgage may be valuable, but it doesn’t automatically make it the more appropriate option.

Does a 15-Year Mortgage Affect How Much You Can Qualify to Borrow?

Yes, it can.

Mortgage lenders evaluate your ability to repay a loan using your qualifying income, existing debts, and proposed housing expenses.

Because a 15-year mortgage generally has a higher required monthly payment, it may result in a higher debt-to-income ratio compared with a 30-year loan for the same amount borrowed.

That can influence the maximum loan amount you qualify for.

For example, someone may qualify for a particular purchase price using a 30-year mortgage but not qualify for the same amount using a 15-year term.

However, qualifying for a larger amount doesn’t necessarily mean borrowing more is the appropriate decision.

Your budget should reflect both what the lender will approve and what you’re comfortable spending.

Learn more about conventional mortgage financing options.

Should You Choose a Shorter Mortgage Term When Refinancing?

The 15-year versus 30-year decision isn’t limited to homebuyers.

Existing homeowners may also consider changing their mortgage term when refinancing.

For example, someone with a 30-year mortgage may want to explore a shorter loan term to accelerate repayment.

Others may consider extending their remaining repayment period to reduce their required monthly payment.

However, refinancing involves a new mortgage, potentially different interest rates, closing costs, and qualification requirements.

It’s also important to consider how long you’ve already been paying on your existing mortgage.

If you’ve paid down your current loan for several years, refinancing into a new 30-year mortgage could extend the time it takes to become mortgage-free.

Even if the new monthly payment is lower, your total remaining interest expense could increase.

I recommend reviewing the remaining balance, current mortgage terms, available refinance options, and total projected costs before deciding.

Visit our rate-and-term refinance guide for additional information.

How to Decide Which Mortgage Term Fits Your Financial Goals

Rather than starting with the assumption that a shorter or longer mortgage is preferable, I recommend comparing both options using your actual financial circumstances.

Consider the following questions:

What monthly payment feels comfortable? Look at your full housing expense, not just principal and interest.

How important is paying off your home sooner? A shorter term may align with a goal of becoming mortgage-free earlier.

What other financial priorities do you have? Emergency savings, retirement contributions, and other obligations deserve consideration.

How stable is your household income? A lower required monthly payment may provide valuable flexibility if income varies.

How long do you expect to keep the mortgage? If you’re likely to sell or refinance before either loan reaches maturity, comparing balances and interest paid over your expected holding period may be more meaningful than comparing lifetime totals.

You can also use our mortgage calculator to explore different loan amounts, terms, and estimated payments.

The calculator provides illustrations, not a loan approval or an offer of specific financing terms.

The most useful comparison is one based on actual loan proposals that reflect your credit profile, property, down payment, and available interest rates.

Frequently Asked Questions

Is a 15-year mortgage always better than a 30-year mortgage?

No. A 15-year mortgage generally offers faster repayment and lower total interest costs, while a 30-year mortgage typically provides a lower required monthly payment. The appropriate choice depends on your financial circumstances and goals.

Are interest rates lower on 15-year mortgages?

They often are, but not always. Mortgage rates depend on market conditions, lender pricing, credit characteristics, loan programs, and other transaction details.

Can I switch from a 30-year mortgage to a 15-year mortgage?

Potentially. Homeowners may be able to refinance into a shorter loan term if they qualify. Refinancing involves a new loan and should be evaluated based on the available rates, closing costs, and potential financial benefits.

Does a 15-year mortgage build equity faster?

A 15-year fully amortizing mortgage generally reduces the outstanding principal balance faster than a comparable 30-year loan when scheduled payments are made. However, overall home equity also depends on changes in property value.

Is it better to make extra payments on a 30-year mortgage?

That depends on your interest rate, loan terms, cash reserves, and other financial priorities. Extra principal payments can reduce interest and shorten the loan term, but you should evaluate whether that use of your money fits your overall financial situation.

Are mortgage terms other than 15 or 30 years available?

Yes. Some lenders offer other repayment terms, including 20-year mortgages. Availability and qualification requirements depend on the loan program and lender.

The Bottom Line: Choose the Loan Term That Fits Your Life

A 15-year mortgage can be a useful option for borrowers who want to pay off their homes sooner and are comfortable with the higher required payment.

A 30-year mortgage offers a lower monthly payment and greater flexibility, which may be more appropriate for buyers who want to preserve room in their budgets for other priorities.

After more than 25 years in mortgage lending, I’ve found that the right financing decision isn’t always the one with the lowest total interest or the smallest monthly payment.

It’s the one that fits your financial circumstances and the goals you’re working toward.

Whether you’re purchasing a home or reviewing your existing mortgage, comparing the actual numbers can help you understand which approach makes sense for you.

Have questions about choosing a 15-year or 30-year mortgage?

At Platinum Lending Solutions, we help homebuyers and homeowners throughout Oregon and Washington compare available mortgage programs, evaluate loan terms, and understand financing costs.

I’m happy to help you review the options and determine which loan structure aligns with your priorities.

Ask Stacy Your Mortgage Question

---

About the Author

Stacy Schlesinger is the President of Platinum Lending Solutions, an independent mortgage brokerage serving Oregon and Washington. With more than 25 years of mortgage lending experience, Stacy helps homebuyers evaluate financing options and navigate the mortgage process.

Stacy Schlesinger | NMLS #252075

Platinum Lending Solutions | Company NMLS #251560

Oregon License #ML-4475 | Washington License #WA CL-251560

Content reviewed October 10, 2026. This article is provided for general educational purposes and is not a commitment to lend or an offer of specific mortgage terms. Mortgage rates, pricing, loan eligibility, costs, and terms are subject to change and applicable underwriting requirements. All loans are subject to credit approval.