Auto Refinance Calculator
Find out whether a new auto loan changes your monthly payment, total cost, or both.
Verify this calculatorVerified
See what the result uses—and what it cannot know.
Sumvoro calculates deterministically from the visible inputs. It does not invent lender terms, local rules, market values, medical facts, or professional judgments.
- 1 · InputsCheck every entered value against the latest statement, quote, measurement, or official source.
- 2 · Formula
Total savings = remaining payments on the current loan − payments on the new loan − upfront refinance costs. Financed costs are included in the new loan principal. - 3 · SensitivityUse Insights to run a lower and higher case. If the conclusion changes easily, collect better information or leave more margin.
- 4 · ScopeThis tool is maintained and covered by automated calculation tests. Provider timing, rounding, and omitted facts can still change a real-world result.
- Formula release
- 2026.10-r4
- Release date
- October 10, 2026
- Review status
- Verified
- Source review
- September 12, 2026
Auto Refinance calculator
Refinancing saves money only when the new loan and all fees cost less over the time you expect to keep it. Extending the term can lower payment while increasing cost.
- Start with a dated payoff balance.
- Count financed and upfront fees once.
- Compare loans at an equal horizon.
Optional readingLearn how this calculator works
How the auto refinance calculator works
Compare current and proposed auto loans, including fees, payment changes, and total remaining cost.
Total savings = remaining payments on the current loan − payments on the new loan − upfront refinance costs. Financed costs are included in the new loan principal.
Read our calculation methodology and limitations.
Example
Compare $24,000 remaining at 9% for 48 months with refinancing at 6% for 48 months and $300 in fees.
What affects the result
- Use the current balance and remaining term, not the original loan amount and term.
- A longer replacement loan may reduce the payment while increasing total cost.
- Fees can be paid upfront or financed; financed fees also accrue interest.
Helpful guides
Frequently asked questions
Which rate should I enter?
Use the fixed contract interest rate when known. APR can include fees, so using APR plus separate fees can overstate cost.
Is a lower monthly payment always a saving?
No. Compare total remaining payments and fees. Extending repayment can lower the monthly amount while increasing total cost.