How It Works
Target highest APR debt with all extra payments.
Avalanche: pay minimums everywhere + all extra on highest APR debt
- Pay only minimums on lower-rate debts.
- Once highest is paid, snowball payment to next highest.
Enter Your Numbers
$
Highest APR debt — paid first in avalanche.
%
APR on the highest-rate debt.
$
Minimum payment on high-rate debt.
$
Lower APR debt — minimum payments until high-rate is gone.
%
APR on the lower-rate debt.
$
Extra amount beyond minimums.
Months to Pay Off High-Rate Debt
19
Total Months to Debt Freedom
64
Estimated Total Interest
$2,035.27
Interest on High-Rate Debt
$775.00
Estimate only — not financial advice; lender terms, fees, and taxes vary. Read the full disclaimer ↓
Debt vs Interest Paid
Add your numbers to see the visual breakdown.
Avalanche Payoff Schedule
How the two debts are cleared when all extra money targets the highest rate first, then rolls onto the next debt. Figures use the same formulas as the calculator.
| Debt | Balance | APR | Order | Months to Clear | Interest Paid |
|---|---|---|---|---|---|
| High-interest debt | $3,500 | 24.00% | 1st | 19 | $775 |
| Low-interest debt | $8,000 | 6.50% | 2nd | 45 | $1,260 |
| Total | $11,500 | — | — | 64 | $2,035 |
Worked Example
$3,500 at 24%, $8,000 at 6.5%, with $150 extra/month.
Pay Off High-Rate Debt
~19 months
Then attack low-rate debt
with the freed-up $225/mo
Total Payoff
~64 months
Estimated Total Interest
~$2,035
Putting the $150 extra plus the $75 minimum entirely against the 24% debt clears it in about 19 months. That $225 then rolls onto the 6.5% debt, with everything paid off in roughly 64 months. Targeting the highest rate first keeps total interest down.
Understanding the Debt Avalanche Method
What the avalanche method does
The debt avalanche is a payoff strategy that directs every spare dollar at the debt with the highest interest rate while paying only the minimums on the rest. Once the top-rate debt is gone, that whole payment rolls onto the next-highest rate, and so on.
It is for anyone juggling multiple debts at different rates who wants to pay the least interest overall. Mathematically, attacking the highest rate first is the most efficient order, which is the method’s main appeal.
How it works step by step
You list your debts by interest rate, highest first. You pay the minimum on everything to stay current, then add all your extra money to the highest-rate balance until it is cleared.
After that debt is paid, you do not pocket the freed-up payment. You add it, along with that debt’s former minimum, to the payment on the next-highest-rate debt, building momentum as each balance falls.
Reading your result
The calculator shows how long the highest-rate debt takes to clear, the total time to be debt-free, and the estimated interest along the way. The payoff schedule breaks down each debt’s timeline and interest contribution.
Notice that lower-rate debt keeps accruing interest while you focus elsewhere, which is why its balance can grow slightly before you turn to it. The trade-off is that you save more on the high-rate balance than you give up on the low-rate one.
Avalanche versus snowball
The avalanche targets the highest interest rate; the snowball targets the smallest balance regardless of rate. Avalanche minimizes total interest, while snowball delivers quicker first wins that can boost motivation.
The mathematically optimal choice is avalanche, but the best method is the one you actually stick with. If early visible progress keeps you going, the snowball’s slightly higher interest cost may be worth it.
Common mistakes
Skipping a minimum payment on a lower-rate debt to throw more at the top one is a costly error: missed payments trigger fees and can hurt your credit, wiping out the interest savings. Always cover every minimum first.
Another pitfall is adding new debt while paying off the old, which refills balances faster than you clear them. Pausing new borrowing is often as important as the payoff order itself.
Tips to stay on track
Automate the minimums so nothing slips, and treat your extra payment as a fixed monthly commitment rather than whatever is left over. Consistency matters more than the exact dollar amount.
When a debt is cleared, resist lifestyle creep and roll its payment onto the next target as planned. That rolled-up payment is the engine that makes later debts fall much faster than the first.
Limitations and a note on advice
This is a simplified model. It assumes fixed rates, steady minimum payments, and a constant extra payment, and it does not capture variable APRs, promotional rates, or changes in your budget over time.
Use the figures as a planning estimate, not a guarantee or financial advice. For an exact plan, confirm each debt’s rate and minimum with your statements, and consider speaking with a nonprofit credit counselor if the debt feels unmanageable.
Assumptions & Best Uses
- Simplified model.
Limitations
- Requires discipline; psychological wins go to snowball method.
Frequently Asked Questions
When should I use the avalanche vs snowball method?
Use the avalanche when minimizing total interest is your priority, since paying the highest rate first is mathematically the most efficient. Use the snowball when you need motivation, because clearing the smallest balance first delivers a quick, visible win. If you have struggled to stick with a payoff plan before, the snowball’s momentum may serve you better even though it costs slightly more interest.
Why does my low-rate balance grow before I pay it?
While you focus all extra money on the highest-rate debt, the lower-rate debt still accrues interest on top of its minimum payments, so its balance can drift up a little before you turn to it. The avalanche accepts this because the interest you save on the high-rate debt outweighs the extra you pay on the low-rate one.
Should I ever skip a minimum payment to pay off the top debt faster?
No. Always make every minimum payment first. Skipping one triggers late fees, can raise your interest rate, and damages your credit, which easily cancels out any interest you would have saved. The avalanche works by paying all minimums and then adding extra only to the highest-rate balance.
What if two debts have the same interest rate?
When rates are tied, the order between them barely affects total interest, so pick by another factor. Many people clear the smaller of the two first for a quicker win, while others target the one with the more punishing terms or fees. Either choice is reasonable when the rates match.
Does the avalanche method help my credit score?
Indirectly, yes. Paying down balances lowers your credit utilization, a major scoring factor, and steady on-time payments build a positive history. Clearing high-rate revolving debt like credit cards tends to help utilization the most. The method is built around consistent payments, which supports your score over time.
How accurate is this estimate?
It is a simplified projection that assumes fixed interest rates, steady minimum payments, and a constant extra payment. Real accounts can have variable rates, promotional periods, or shifting minimums, so your actual timeline and interest will differ. Check the rate and minimum on each statement, and treat the result as a close planning estimate rather than an exact figure.
Sources & References
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
- How credit-card interest is calculated — the avalanche targets the highest APR first to cut total interestConsumer Financial Protection Bureau · verified 2026-06-04
- An essential guide to building an emergency fund — CFPB guidance on managing and reducing debtConsumer Financial Protection Bureau · verified 2026-06-04
Budget & credit disclaimer
These are planning estimates based on the numbers you enter. Interest rates, fees, and lender terms vary and change over time. This is educational information, not financial or credit advice.
Built and maintained by Calculator Matters, an independent calculator project. Method checked against published formulas and primary sources · Last reviewed 3 June 2026 · How we calculate · Found an error? corrections@calculatormatters.com