Last updated: September 2026. This guide covers US fixed rate mortgages. It is educational content, not financial advice.
The 30 year fixed and the 15 year fixed are the two most popular mortgages in the United States. Both give you a rate that never changes, but they lead to very different monthly payments, total costs and financial flexibility.
In this guide we compare the two side by side using this week’s average rates, show how much each one really costs, and help you decide which loan fits your budget and goals. If you are new to home loans, our guide on how a mortgage works explains the basics first.
The Short Answer
- Choose a 30 year fixed if you want the lowest monthly payment, more room in your budget and the flexibility to pay extra when you can.
- Choose a 15 year fixed if you can comfortably afford a much higher payment and want to save a large amount of interest and own your home sooner.
- Not sure? A 30 year loan with voluntary extra payments often gives you a good balance of savings and safety, as we show below.
The rest of this guide shows you how to tell which camp you are in, with real numbers based on this week’s average rates.
How the Two Loans Compare
| Feature | 30 year fixed | 15 year fixed |
|---|---|---|
| Loan length | 30 years (360 payments) | 15 years (180 payments) |
| Interest rate | Higher | Usually about 0.5 to 0.75 percentage points lower |
| Monthly payment | Lower | Much higher |
| Total interest | Much higher | Much lower |
| Equity build up | Slow at first | Fast |
| Budget flexibility | High | Low |
| Qualifying | Easier, because the payment is lower | Harder, because the payment is higher |
This Week’s Rates
According to Freddie Mac’s Primary Mortgage Market Survey for September 17, 2026:
| Loan | Average rate |
|---|---|
| 30 year fixed | 6.95% |
| 15 year fixed | 6.26% |
The 15 year rate is about 0.69 percentage points lower. Lenders charge less on shorter loans because their money is at risk for fewer years.
The Real Cost: A Side by Side Example
Let’s compare both loans on a $300,000 mortgage using this week’s average rates.
| 30 year fixed at 6.95% | 15 year fixed at 6.26% | |
|---|---|---|
| Monthly principal and interest | $1,986 | $2,574 |
| Difference per month | $588 more | |
| Total interest paid | about $414,900 | about $163,300 |
| Total interest saved with 15 years | about $251,600 | |
| Balance left after 5 years | about $282,200 | about $229,100 |
| Balance left after 10 years | about $257,100 | about $132,300 |
Figures are rounded illustrations and exclude property taxes, insurance and mortgage insurance.
A few things stand out:
- The 15 year loan costs $588 more each month, which is a big jump for most budgets.
- It saves more than $250,000 in interest. That is more than 80% of the original loan amount.
- Equity builds much faster. After five years, the 15 year borrower has paid off about $70,900 of principal, compared with about $17,800 on the 30 year loan.
Why the 30 Year Loan Costs So Much More
Two things work against the 30 year borrower:
- A higher rate. In our example, the 30 year loan costs 6.95% instead of 6.26%.
- Twice as long to pay interest. Interest is charged on the outstanding balance every month, and with a 30 year loan that balance falls very slowly in the early years.
In the first month of the 30 year loan above, about $1,738 of the $1,986 payment goes to interest and only about $248 reduces the balance. On the 15 year loan, the first payment puts about $1,009 toward principal.
Pros and Cons of a 30 Year Fixed Mortgage
Pros
- Lowest required monthly payment, which makes homeownership more affordable.
- Easier to qualify, because your debt to income ratio is lower.
- More flexibility. You can pay extra when money allows, but you are not forced to.
- More money for other goals, such as retirement savings, an emergency fund or children’s education.
- Protection in hard times. If your income drops, a lower required payment is easier to keep up.
Cons
- Much more interest over the life of the loan.
- Slower equity growth, especially in the first ten years.
- A higher interest rate than the 15 year option.
- Debt in later life if you buy in your 40s or 50s.
Pros and Cons of a 15 Year Fixed Mortgage
Pros
- Huge interest savings, often hundreds of thousands of dollars.
- Lower interest rate.
- Faster equity, which gives you more options if you want to sell, move or borrow against your home.
- Mortgage free sooner, which can be powerful as you approach retirement.
Cons
- Much higher monthly payment, which can strain your budget.
- Harder to qualify, because the payment raises your debt to income ratio.
- Less flexibility if your income falls or unexpected costs appear.
- Less money available to invest, save or pay down higher interest debt.
The Middle Path: A 30 Year Loan With Extra Payments
Many borrowers take a 30 year loan and simply pay extra toward the principal. This gives you some of the savings of a shorter loan while keeping a lower required payment as a safety net.
Using the same $300,000 loan at 6.95%:
| Strategy | Monthly payment | Paid off in | Total interest |
|---|---|---|---|
| 30 year, no extra payments | $1,986 | 30 years | about $414,900 |
| 30 year plus $200 extra a month | $2,186 | about 23 years | about $299,600 |
| 30 year plus $588 extra a month | $2,574 | about 16 years | about $201,000 |
| 15 year fixed at 6.26% | $2,574 | 15 years | about $163,300 |
Paying the same $2,574 a month on a 30 year loan pays it off in about 16 years, but still costs around $37,700 more in interest than a true 15 year loan. That gap is the price of the higher rate.
So the trade off is clear: the 15 year loan is cheaper if you are certain you can always make the higher payment, while the 30 year loan with extra payments costs somewhat more but gives you the freedom to scale back in a tough month.
Before making extra payments, confirm with your lender that the money will be applied to principal and that there are no prepayment penalties. Most standard US mortgages do not have them.
Which Should You Choose? Questions to Ask Yourself
Can you afford the 15 year payment comfortably?
Not just barely. After the higher payment, you should still be able to cover all your bills, save for emergencies and contribute to retirement. A common guideline is to keep total housing costs under about 28% of your gross income.
Do you have an emergency fund?
If you have little savings, the lower payment of a 30 year loan leaves room to build a cushion. A 15 year loan with no emergency fund is a risky combination.
Are you saving enough for retirement?
If you are not yet taking full advantage of employer retirement matches or tax advantaged accounts, it often makes sense to prioritize those before paying off a mortgage faster.
Do you have higher interest debt?
Paying off credit cards or personal loans with higher rates usually saves more than accelerating a mortgage.
How stable is your income?
Steady, predictable income makes a 15 year loan safer. Commission based, seasonal or self employed income may call for the flexibility of a 30 year loan.
How close are you to retirement?
If you want to be mortgage free by a certain age, a 15 year loan may match your timeline better.
Who Each Loan Suits Best
A 30 year fixed often suits:
- First time buyers stretching to afford a home.
- Buyers in high cost areas.
- Families with young children and many competing expenses.
- People with variable income.
- Borrowers who want to invest the difference or build savings.
A 15 year fixed often suits:
- Buyers with high, stable incomes relative to their loan.
- People refinancing after years of paying down a 30 year loan.
- Buyers in their 40s or 50s who want to be debt free by retirement.
- Downsizers who need a smaller loan.
Other Factors to Consider
Inflation
A fixed payment stays the same for the life of the loan, while wages and prices usually rise over time. That means a 30 year payment tends to feel smaller in real terms as the years go by. Some borrowers see this as a reason to keep a longer loan and let inflation do some of the work, especially when mortgage rates are low relative to inflation.
The mortgage interest deduction
US homeowners who itemize deductions may be able to deduct mortgage interest on their federal tax return, within limits. Because a 30 year loan generates more interest, the deduction can be larger. However, many households take the standard deduction instead, in which case this benefit does not apply. Speak with a tax professional before letting taxes drive your decision.
Opportunity cost
Every extra dollar you put into your mortgage is a dollar you are not saving or investing elsewhere. Paying down a mortgage gives you a guaranteed “return” equal to your interest rate, with no market risk. Investing may earn more over long periods, but with ups and downs. The right balance depends on your risk tolerance and financial goals.
Mortgage insurance
If you put down less than 20% on a conventional loan, you will usually pay private mortgage insurance. Because a 15 year loan builds equity faster, you typically reach the point where PMI can be removed much sooner.
Common Mistakes to Avoid
- Choosing 15 years just because the rate is lower. The payment matters more than the rate if it leaves your budget too tight.
- Stretching for a 15 year loan with no savings. An emergency fund should come first.
- Assuming you will always make extra payments. Good intentions often fade. Be honest about your habits.
- Ignoring retirement savings. Missing out on an employer match to pay off a mortgage faster is usually a costly trade.
- Comparing only the monthly payment. Look at the total interest and how fast you build equity.
Refinancing From 30 to 15 Years
If you already have a 30 year mortgage, refinancing into a 15 year loan can save a lot of interest, especially if rates have fallen or your income has grown. Weigh the closing costs, usually 2% to 5% of the loan amount, against the savings. Our guide on whether you should refinance your mortgage explains how to calculate the break even point.
Frequently Asked Questions
Is a 15 year mortgage always better than a 30 year?
No. It saves interest but requires a much higher payment. For many households, the flexibility of a 30 year loan is worth more than the interest savings.
How much lower is the 15 year rate?
It varies, but the 15 year rate is typically about 0.5 to 0.75 percentage points below the 30 year rate. This week the gap is about 0.69 points.
Can I pay off a 30 year mortgage in 15 years?
Yes. By paying extra each month you can shorten the loan significantly. You will still pay somewhat more interest than a 15 year loan because of the higher rate, but you keep flexibility.
Is it harder to qualify for a 15 year mortgage?
Often, yes. The higher payment raises your debt to income ratio, so you may qualify for a smaller loan amount than with a 30 year mortgage.
Does a 15 year mortgage help me get rid of PMI faster?
Usually, yes. Because more of each payment goes to principal, you reach 20% equity much sooner, which is when you can typically ask your lender to cancel private mortgage insurance on a conventional loan.
Are there 20 or 10 year options?
Yes. Many lenders also offer 20 year and 10 year fixed loans, which sit between or beyond the two most common options.
The Bottom Line
A 30 year fixed mortgage offers the lowest payment and the most flexibility, while a 15 year fixed mortgage offers a lower rate, faster equity and enormous interest savings. On a $300,000 loan at this week’s average rates, the 15 year option costs $588 more a month but saves more than $250,000 in interest.
Choose the 15 year loan only if the higher payment fits comfortably alongside your savings and other goals. Otherwise, a 30 year loan with extra payments when you can afford them is a smart middle path. Compare offers from several lenders and speak with a licensed mortgage professional if you are unsure.
Disclaimer: This article is for general educational purposes only and does not constitute financial advice. Example rates are based on the Freddie Mac Primary Mortgage Market Survey for September 17, 2026, and are not offers of credit. Your rate and payment will depend on your financial situation, lender and market conditions.