Fixed-rate financing means the interest rate on your loan does not change over the life of your loan. With a fixed rate, you can see your payment for each month and the total you will pay over the life of a loan. You might prefer fixed rates if you are looking for a loan payment that won’t change.
Variable-rate financing is where the interest rate on your loan can change, based on the prime rate or another rate called an “index.” With a variable-rate loan, the interest rate on the loan changes as the index rate changes, meaning that it could go up or down.
Because your interest rate can go up, your monthly payment can also go up. The longer the term of the loan, the more risky a variable rate loan can be for a borrower, because there is more time for rates to increase.