30-yr fixed 6.43% ▾ 0.06 wk
15-yr fixed 5.79% ▾ 0.04 wk
HELOC avg 7.90% — no change
Auto 60-mo new 6.82% ▴ +0.03 mo
Personal 24-mo 11.57% ▾ 0.12 qtr
Credit card APR 21.52% ▴ +0.09 qtr
as of Jul 2, 2026 · Federal Reserve / Freddie Mac via FRED (St. Louis Fed)
Credit Cards & Debt

Credit Card Optimizer Calculator

Optimize how you split a fixed monthly budget across several cards. Paying the highest rate first minimises total interest and clears your cards fastest.

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Estimates only. Change any value to recalculate instantly.

Debt-free in 3.6 years 43 months · $5,519 total interest
Total debt $19,000
Total interest $5,519
Interest saved vs minimums $9,574
Sooner than minimums 47 mo
Total debt vs interest
Total debt vs interest Principal: $19kInterest: $5.5k
  • Principal $19k
  • Interest $5.5k
Total balance Debt balance
Total balance: Debt balance $15k$11k$7.4k$3.7k$0 Yr 1Yr 2Yr 3Yr 4

Optimised allocation pays the highest-rate card first. You pay every minimum, then send the extra $200 — plus each freed-up payment as debts clear — to the target. That rolling snowball is what clears everything in 3.6 years.

Combined payoff schedule by yearView table
YearInterestPrincipalBalance
1$2,717$6,960$14,757
2$1,866$6,960$9,664
3$846$6,960$3,550
4$89$3,639$0

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.

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