Fixed-Rate Mortgage
A fixed-rate mortgage keeps the same interest rate for the loan’s life. Learn how predictable payments differ from adjustable-rate mortgages.
Definition
A fixed‑rate mortgage is a home loan with an interest rate that remains constant for the entire loan term, typically 15 or 30 years. Unlike adjustable‑rate mortgages (ARMs), a fixed‑rate loan offers predictable monthly payments, making it easier for borrowers to budget long term. Because the rate doesn’t change, borrowers are protected from interest‑rate spikes but won’t benefit from falling market rates unless they refinance. Fixed‑rate mortgages are popular among buyers who plan to stay in a home for many years and prefer the security of consistent payments, even if initial rates are slightly higher than those of ARMs.
Why It Matters
Only the principal and interest are actually fixed. Taxes and insurance keep climbing inside your escrow, so a payment of $2,780 in 2026 can be $3,120 by 2031. What the rate lock does buy is real: in year 20 you are still paying 2026 prices for shelter while rent on the identical house next door has close to doubled.
Examples
$400,000 at 6.5% over 30 years costs about $510,000 in interest. The same amount at 5.9% over 15 years costs about $200,000, with the payment rising from $2,528 to $3,352.
A homeowner holding a 3.1% loan from 2021 declines to move in 2026 because the same house at 6.4% would add roughly $1,100 a month.
King County taxes on one house go from $5,400 to $6,900 in four years, pushing the escrow share of a fixed payment up $125 a month.
Tips
Compare loans on total interest across the years you will realistically hold the house. A $4,000 buydown only pays back if you stay past its break-even month.
Want 15-year discipline without 15-year risk? Take the 30-year and voluntarily pay the 15-year amount. You keep the option to drop back in a bad year.
Confirm in writing on the note that there is no prepayment penalty. Most conventional loans have none, but portfolio and non-QM products sometimes do.
Related Terms
Adjustable-Rate Mortgage (ARM)
An adjustable-rate mortgage (ARM) features a changing interest rate. Learn how initial teaser rates,...
Variable Rate Mortgage
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Interest Rate
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