Debt Avalanche vs Debt Snowball: Which Payoff Plan Works Better?
A worked example of both debt payoff methods, how much interest each saves, and how to pick the one you will actually stick with.
Read the guideCredit Card Payoff Calculator
Estimate payoff time using your current payment and with an extra amount.
Months to Pay Off0
Interest Paid$0
Months with Extra Payment0
Estimated Interest Saved$0
Planning a credit card payoff
This calculator shows how many months it will take to clear a card balance at a fixed monthly payment, how much interest you will pay on the way, and how much an extra amount each month saves. It assumes you stop adding new purchases to the card.
Interest is calculated monthly from the APR. If the payment is not larger than the first month’s interest, the balance never falls, and the calculator tells you the payment is too low.
Worked example with the default values
A $8,000 balance at 21.9% APR collects about $146 of interest in the first month alone.
- Paying $250 a month: cleared in 49 months, about $4,125 of interest
- Paying $350 a month ($100 extra): cleared in 30 months, about $2,447 of interest
- Saving from the extra $100: about $1,677 and 19 months
For comparison, paying only $160 a month would take 135 months, more than 11 years, and cost about $13,550 in interest.
How to clear it faster
- Fix the payment instead of paying the minimum, which falls as the balance falls.
- Stop using the card so new purchases do not collect interest straight away.
- Target the highest APR first if you have more than one card.
- Consider a 0% balance transfer if the fee is small and you can repay before the offer ends.
Want the full explanation? Read our guide: How Credit Card Interest Is Calculated (APR, Daily Rate and Grace Periods).
How to use the Credit Card Payoff Calculator
- Enter the outstanding balance, annual rate, and planned monthly payment.
- Check how the timeline changes when you increase the payment by a realistic amount.
- Use the result to choose a payoff target that fits your budget consistently.
Credit card payoff model
Monthly interest = balance × monthly rate; next balance = previous balance + interest − payment
- Balance: Current amount owed
- Monthly rate: Annual rate ÷ 12
- Payment: Amount paid each month
The calculator iterates month by month until the balance reaches zero, which makes it useful for testing extra payment strategies.
Quick planning notes for the Credit Card Payoff Calculator
Estimate payoff time and interest saved with extra payments. Start with a realistic baseline, then change one input at a time to see how the result moves. That makes it easier to compare scenarios and spot the trade-offs that matter most.
Debt payoff notes
- Extra monthly payments usually reduce total interest meaningfully even when the payment increase looks small.
- Prioritize high-interest balances first if your overall goal is to minimize cost.
- Check whether consolidating debt changes the payoff timeline before committing to a new loan.
Keep in mind
These results are designed for educational planning. Real-world figures can change based on official rates, lender fees, tax treatment, insurance, and personal circumstances.
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Frequently asked questions
Why does the calculator say my payment is too low?
Your payment does not cover the monthly interest, so the balance would grow. Increase the payment until it is above the first month’s interest.
Is the result exact?
It is a close estimate. Card issuers usually charge interest daily on your average balance, and the number of days in each billing cycle varies, so real figures differ slightly.
Should I use savings to pay off my card?
Often, yes, because card interest is far higher than savings interest. Keep a small emergency buffer so the next unexpected bill does not go back on the card.
Does paying off a card raise my credit score?
Usually. Lower balances relative to your credit limits improve your credit utilisation, which is a major factor in most scores.
Guides on this topic
Plain-English explanations to help you read the result above.
How Credit Card Interest Is Calculated (APR, Daily Rate and Grace Periods)
Understand APR, the daily periodic rate, average daily balance and the grace period, and see why minimum payments keep you in debt for years.
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