Auto Calculators

Auto Refinance Interest Savings Calculator

See how much interest a lower rate saves when you refinance your existing car loan over the same remaining term.

Inputs

Current loan balance

Current interest rate

New interest rate

Months remaining

Estimates only. Change any value to recalculate instantly.

Total interest saved $1,487 $30.98 lower payment for 48 months

Current payment $552.71

New payment $521.73

Monthly saving $30.98

Interest saved $1,487

Remaining interest compared

New-rate interest $3.0k
Interest saved $1.5k

Loan balance Current (9.50%)New (6.50%)

Refinancing from 9.50% to 6.50% over the same 48 months saves $1,487. Watch for any refinance or title fees, which this estimate excludes.

Balance & cumulative interest by yearView table

Year	Current-rate balance	New-rate balance	Current interest	New interest
1	$17,254	$17,023	$1,887	$1,283
2	$12,038	$11,712	$3,303	$2,234
3	$6,303	$6,046	$4,201	$2,828
4	$0	$0	$4,530	$3,043

How this calculator works

This calculator runs entirely in your browser — nothing you enter is sent anywhere, and there is no sign-up. Change any input and the result, breakdown, and schedule update instantly.

Rate and cost fields are pre-filled with current benchmarks (Federal Reserve / Freddie Mac via FRED (St. Louis Fed)), so your first result is already realistic — replace them with your own quote to see your numbers. To weigh one option against another, use the loan comparison calculator.

Common questions

Is this calculator free, and do I need to sign up?

Yes and no — it is completely free and asks for no account or personal details. Every calculation happens in your browser, so nothing you type is stored or sent to us.

How accurate are the results?

The math is exact for the inputs you give it, but the defaults are national benchmarks — your real rate, fees, taxes, and insurance will differ. Treat the result as a close estimate to refine with a real quote.