A fixed rate loan is a loan on which the interest rate is set at the time of borrowing and remains the same for the entire term of the loan, regardless of how market interest rates move afterward. This is the main alternative to an adjustable or variable rate loan, where the rate, and usually the payment, can rise or fall over the life of the loan in response to a reference rate such as a central bank's policy rate.
Fixed rate loans are common across personal loans, auto loans, student loans and mortgages, though the specific tradeoffs of choosing fixed over variable differ by product and market, largely depending on how far apart fixed and variable rates are priced at the time of borrowing and how long the borrower expects to hold the loan.
Fixed rate loan in plain terms
Choosing a fixed rate loan is similar to agreeing a flat monthly subscription price with a gym that can never be raised, no matter what happens to other gyms' prices around town. Other members on a variable deal might end up paying less if prices in the market fall, but they could also end up paying considerably more if prices rise. The fixed rate borrower trades away any chance of benefiting from falling rates in exchange for complete protection from rising ones.
How the rate is set
Lenders price a fixed rate loan based on their own cost of funding over a period matching the loan's term, an estimate of credit risk specific to the borrower reflected in their credit score, and a profit margin. Because the lender is committing to a rate that cannot be adjusted later even if its own funding costs rise, fixed rates for longer terms are often priced somewhat higher than the equivalent starting rate on a variable loan, as compensation for that certainty.
Fixed rate loans and prepayment
Some fixed rate loans include a prepayment penalty if the borrower pays the loan off early or refinances, because early repayment removes interest income the lender was expecting to earn under the fixed-rate agreement. Whether a prepayment penalty applies, and for how long, varies significantly by country, lender and loan type, and is one of the details worth checking carefully in the loan contract before signing, especially for a borrower who expects their circumstances to change.
When a fixed rate loan makes sense
A fixed rate loan is generally favored by borrowers who value payment certainty, expect interest rates to rise over the life of the loan, or plan to hold the loan for a long period without refinancing. It is also a common choice for borrowers who want to plan a household budget years in advance, since a fixed rate removes one of the largest sources of uncertainty in long-term financial planning: the possibility of a future payment increase driven entirely by market conditions outside the borrower's control. It is typically less attractive to a borrower who expects to repay or refinance quickly, since in that case the extra certainty of a fixed rate may not be worth its typically higher starting cost compared with a variable rate loan over a short holding period.
Fixed rate loans and credit risk
A fixed rate does not remove credit risk from the loan; it only removes interest-rate risk. The borrower's obligation to repay remains exactly the same regardless of the rate structure, and default on a fixed rate loan carries the same consequences, damage to the borrower's credit report, potential collection activity, and, for secured loans, possible repossession of collateral, as default on a variable rate loan. Lenders still assess a borrower's ability to repay a fixed rate loan using the same underwriting tools used for any other loan, including income verification and a review of existing debt obligations, before fixing the rate that will apply for the full term.