Auto Loan Extra Payment Calculator
See how much interest and how many months you cut by adding extra principal each month.
Tell the servicer extra amounts are principal-only. Prepayment penalties are uncommon on auto loans but read the contract.
How this tool works
Enter remaining balance, APR, current payment, and extra principal. The tool estimates months cut and interest saved.
Why it matters for your credit
Auto loans are installment accounts. Extra principal does not help utilization the way card paydowns do, but it can free cash flow that later protects your credit.
Frequently asked questions
- Will extra payments hurt my credit?
- Paying down an installment loan is usually neutral-to-small. The bigger win is less interest and a car that is yours sooner.
- Should I tell the lender it is principal only?
- Yes. Otherwise some servicers may advance your due date instead of cutting principal.
This tool gives an educational estimate only — not a promise of a specific score change, approval, or lender decision. Explore all free tools, dispute letter templates, or the credit guides.