| Feature | 30-year fixed | 15-year fixed |
|---|---|---|
| Sample rate | 6.5 percent | 5.75 percent |
| Monthly principal and interest | About 1,896 dollars | About 2,491 dollars |
| Total interest paid | Much higher | Much lower |
| Equity growth | Slower | Faster |
Glossary · Financing & mortgages
Fixed-Rate Mortgage
A fixed-rate mortgage keeps the same interest rate for the entire loan term, so the principal and interest portion of your payment never changes. The most common terms are 30 and 15 years. Its main appeal is predictability, protecting borrowers from rising rates and making long-term budgeting straightforward.
How does a fixed-rate mortgage work?
You lock one interest rate at closing, and it applies for the full term. Each payment splits between principal and interest on a set amortization schedule. Early payments are mostly interest; over time more goes to principal, but the principal and interest total stays constant.
Amortization spreads the loan into equal principal and interest payments across the term. The rate never changes, so that portion of your payment is locked in from day one.
A 15-year loan usually carries a lower rate but higher monthly payments than a 30-year, because you repay the balance faster and pay less total interest.
Why choose a fixed-rate mortgage?
Predictability is the core benefit. You know your principal and interest payment for the life of the loan, which simplifies budgeting and shields you from rate increases. The trade-off is that fixed rates often start higher than an ARM's introductory rate.
Because the rate cannot rise, a fixed loan protects you if market rates climb after you close. That certainty is valuable for buyers who plan to stay put for years.
If rates fall significantly later, you can refinance to capture the lower rate, though refinancing means qualifying again and paying closing costs.
What is the difference between a 15-year and 30-year fixed loan?
A 30-year fixed spreads payments over more years, lowering the monthly amount but raising total interest. A 15-year fixed costs more each month but carries a lower rate and far less total interest. The right choice balances monthly affordability against long-term savings.
The 30-year term is the most popular because its lower payment fits more budgets. The trade-off is decades of interest and slower equity growth.
A 15-year loan builds equity faster and saves substantial interest, but the higher payment leaves less monthly cushion, so weigh both against your budget.
Worked example. For example, on a 300,000 dollar loan, a 30-year fixed at 6.5 percent has a principal and interest payment near 1,896 dollars. A 15-year fixed at 5.75 percent runs about 2,491 dollars a month. The 15-year costs roughly 595 dollars more monthly but saves well over 200,000 dollars in total interest across the loan.
Common mistakes with Fixed-Rate Mortgage
- Do not assume the principal and interest payment covers everything, because escrowed taxes and insurance can still raise your total bill.
- Do not pick a 15-year term without confirming the higher payment fits comfortably in your budget.
- Do not ignore refinancing as an option, since a fixed rate can be lowered later if market rates fall.
- Do not compare only the interest rate between fixed and adjustable loans, because their risk profiles differ sharply.
- Do not overlook total interest cost, since a lower monthly payment on a 30-year loan means far more interest overall.
Related terms
Term
Adjustable-Rate Mortgage (ARM)
A mortgage whose interest rate can change periodically based on a market index.
Define TermConventional Loan
A mortgage not insured or guaranteed by the government, often following Fannie Mae and Fre
Define TermPITI
The four components of a typical monthly mortgage payment: principal, interest, taxes, and
Define TermDiscount Points
Upfront fees a borrower pays the lender to lower the loan's interest rate.
DefineFixed-Rate Mortgage FAQ
Can my fixed-rate mortgage payment ever change?
The principal and interest portion cannot change on a fixed-rate loan. Your total monthly payment can still rise if escrowed property taxes or homeowners insurance increase, since those are recalculated during the lender's annual escrow analysis.
Is a 15-year or 30-year fixed loan better?
A 15-year loan saves substantial interest and builds equity faster but has a higher monthly payment. A 30-year loan costs less each month but far more in total interest. The best choice depends on your budget and goals.
Why are fixed rates higher than ARM intro rates?
A fixed rate locks in the lender's risk for decades, so it usually starts higher than an ARM's short introductory rate. You pay a bit more upfront in exchange for protection against future rate increases.
Should I pay extra toward a fixed-rate mortgage?
Extra principal payments shorten the loan and cut total interest without changing your required payment. Confirm there is no prepayment penalty, then apply extra funds to principal to build equity and pay off the balance faster.
Can I refinance a fixed-rate mortgage?
Yes. If market rates drop enough, you can refinance into a new fixed loan at a lower rate. You must qualify again and pay closing costs, so compare the savings against those costs before refinancing.
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