ποΈ Debt Payoff Planner
Compare snowball vs avalanche side by side and find your debt-free date.
Debt-Free Date
Estimates for planning only, not financial advice.
How to Use This Calculator
This planner runs your debts through both payoff strategies at the same time, so you can see the math and pick the approach that fits you. List each debt with its balance, APR, and minimum payment, then enter the extra amount you can pay each month on top of all minimums.
Add a row for each debt (up to 5). Enter the Name, Balance, APR, and Minimum payment from your statements. Rows you leave blank are ignored.
Enter your Extra Monthly Payment, the amount above all minimums that goes to the focus debt each month.
Press Calculate. The comparison table shows months, interest, and debt-free dates for both strategies, plus the exact payoff order for each.
Read the interest-saved callout. Avalanche never costs more than snowball, but if the gap is small and you need quick wins, snowball may be the smarter behavioral choice.
How Each Strategy Works
Both strategies pay every minimum every month so nothing goes late. The difference is where the extra money goes. Avalanche attacks the most expensive debt first, which minimizes total interest by definition. Snowball attacks the smallest balance first, which clears a whole account fastest and hands you an early win. When a focus debt is paid off, its entire payment, minimum plus extra, rolls into the next focus debt. That rollover is what makes both strategies accelerate over time.
Worked Example: Three Debts, $200 Extra
Card A: $5,000 at 19.99 percent, minimum $125. Card B: $2,500 at 14.99 percent, minimum $75. Loan C: $1,200 at 22.99 percent, minimum $40. Extra payment: $200 a month. Under avalanche, the order is Loan C (paid off in month 6), then Card A (month 21), then Card B (month 25). Total: 25 months, $1,781.16 in interest. Under snowball, the order is Loan C (month 6), then Card B (month 14), then Card A (month 25). Total: 25 months, $1,913.86 in interest. Avalanche saves $132.69 here. Both finish in the same month because the total monthly payment is identical; the difference is purely where the dollars went along the way.
Psychology vs Math: Picking Your Strategy
The debate is real and both sides have a point. Avalanche is unbeatable on cost, so if you are disciplined and the interest gap is large, take the math win. Snowball wins behaviorally: research on debt payoff consistently finds that people who clear small debts first are more likely to finish, because each paid-off account is proof the plan works. A practical rule: if avalanche saves more than a few hundred dollars, take avalanche. If the gap is small and you have quit payoff plans before, take snowball and protect your momentum. And if your extra payment is zero, strategy barely matters, so focus on finding even $50 more a month. Estimates for planning only, not financial advice.
Frequently Asked Questions
Snowball vs avalanche: which is better?
Avalanche (highest APR first) always costs the same or less in interest, so it wins on pure math. Snowball (smallest balance first) wins on psychology, because clearing a whole debt early builds momentum. In the example below, avalanche saves $132.69 over snowball. Pick the one you will actually stick with for two years, because the best plan is the one you finish.
Should I pay the smallest debt or the highest APR first?
Pay the highest APR first if you want the lowest total cost, since expensive interest compounds against you every month. Pay the smallest balance first if past payoff attempts fizzled out, since the quick win of deleting a whole debt keeps motivation high. Either way, pay minimums on everything and throw all extra cash at the one focus debt.
When should I consolidate my debts?
Consolidation helps when you can get a single lower rate than your current weighted average, such as a personal loan at 10 percent replacing cards at 20 percent plus. It does not help if the new rate is similar, if fees eat the savings, or if freeing up card limits just leads to new spending. Run both strategies above first, then compare against the consolidation loan offer.
What is a good extra monthly payment?
Any amount above the minimums counts, because the entire extra payment attacks principal directly. A common starting point is $200 a month, which in the worked example cuts years off both strategies. If that is too much, start with $50 and raise it every time a debt is paid off, rolling the freed minimum into the extra amount automatically.
What if I can only afford the minimum payments?
Then minimums are still the right move, because missing payments triggers late fees and damages your credit. Focus on stopping new charges first, then look for even a small extra amount. Meanwhile, calling issuers to ask for a lower APR costs nothing and can shave months off a minimums-only payoff.