Lenders use your credit score as their primary signal for risk, and that translates directly into the interest rate they offer. Buyers with scores in the “excellent” range typically qualify for the lowest advertised rates, while those with fair or poor credit are often offered rates several points higher, sometimes doubling the total interest paid over the loan. Before applying, it’s worth checking your credit report for errors, since even small inaccuracies can push you into a worse pricing tier than you actually qualify for. Once you have a realistic rate estimate, plug it into our car loan calculator to see your true monthly cost.
If your credit score isn’t where you’d like it to be, a larger down payment or a co-signer can sometimes offset the impact on your rate. It’s also worth comparing offers from multiple lenders rather than accepting the dealership’s in-house financing by default — our comparison of dealer financing vs. bank auto loans explains why rates can vary meaningfully between the two. And if you’re weighing whether to wait and improve your score before buying, our guide on what affects your car loan interest rate breaks down which factors matter most.