$300 Extra/Month, snowball Method
Payoff projection for a 3-card, $9,500 example balance. Use the calculator below to enter your own cards.
Time to Pay Off All Cards
1.8 years
Example
Paying $285/month in minimums plus $300 extra toward 3 cards totaling $9,500 using the Snowball (smallest balance first) method pays everything off in about 1.8 years, costing $2,063 in interest.
Total Balance
$9,500
Monthly Payment (min + extra)
$585
Total Interest Cost
$2,063
Avalanche Comparison
$1,894 interest, 1.9 yrs
Balance vs. interest paid
- Original Balance: $9,500
- Interest Paid: $2,063
Avalanche vs. Snowball: Which Payoff Method Is Better?
Both strategies pay the minimum on every card, then throw all extra money at one target card until it's paid off — then roll that card's freed-up minimum payment into the extra amount for the next target, cascading faster and faster as each card disappears.
The avalanche method targets the highest-APR card first, which minimizes total interest paid mathematically. The snowball method targets the smallest balance first instead, trading a bit more interest for the psychological win of eliminating a full card sooner — often the difference that keeps people motivated to stick with a payoff plan.
Combined remaining balance over time
Year-by-Year Payoff Schedule
| Year | Paid This Year | Interest Paid | Remaining Balance |
|---|---|---|---|
| 1 | $6,705 | $1,611 | $4,406 |
| 2 | $4,858 | $452 | $0 |
How Is Multi-Card Payoff Calculated?
Each month, every card is charged interest and receives at least its minimum payment. Any extra money — plus the minimum payments freed up from cards that have already been paid off — is directed entirely at one "target" card, chosen by your selected strategy, until every card reaches zero.
Why Avalanche Saves More Money
Interest accrues fastest on the highest-APR balance, so eliminating that balance first stops the most expensive interest charges as early as possible — mathematically, this always produces the lowest total interest cost of any fixed-payment strategy.
Why Snowball Still Works for Many People
Behavioral research on debt payoff (notably popularized by financial educator Dave Ramsey) found that people who use the snowball method are more likely to stick with their plan to completion, because eliminating a full account balance — regardless of its interest rate — provides a motivating sense of progress that a slowly-shrinking high-balance card doesn't.
The Cascade Effect
Both methods speed up over time: once a card is paid off, its former minimum payment doesn't disappear — it gets added to the extra payment attacking the next target card, so the total "debt attack" amount grows larger with each card eliminated.
Example — Your Current Inputs
Paying $285/month in minimums plus $300 extra toward 3 cards totaling $9,500 using the Snowball (smallest balance first) method pays everything off in about 1.8 years, costing $2,063 in interest.
Additional Example — Two Cards, No Extra Payment
Two cards — $4,000 at 22% APR with a $120 minimum, and $2,000 at 16% APR with a $60 minimum — paid with no extra money take about 4.8 years to clear and cost roughly $1,750 in combined interest, versus under 3 years with just $150/month extra applied via avalanche.
About These Parameters
- Balance, APR & Minimum Payment (per card)
- Enter up to four cards. Leave a card's balance at 0 to exclude it. Minimum payments typically come from your card statement — often 1%-3% of the balance plus interest.
- Extra Monthly Payment
- Any amount beyond the combined minimums that you can consistently commit to debt payoff each month — even a modest extra amount compounds into a significantly faster payoff and lower total interest.
- Strategy
- Avalanche minimizes total interest; snowball prioritizes early wins for motivation. This calculator shows both so you can weigh the tradeoff for your own situation.
Frequently Asked Questions
Which method is objectively better?
Avalanche always produces equal or lower total interest than snowball for the same extra payment amount. Snowball can still be the better choice if it's the one you'll actually stick with to the end.
Should I use a balance transfer instead?
A 0% APR balance transfer card can be a powerful complement to either strategy by temporarily pausing interest on the transferred balance, letting extra payments go entirely toward principal during the promotional period.
What if I can't afford all the minimum payments?
This calculator assumes all minimums are paid on time every month. If that's not currently possible, consider contacting a nonprofit credit counseling agency about a debt management plan before missed payments and penalty APRs make the situation worse.