Finance calculator
Debt Avalanche & Snowball Calculator (2026)
Compare two payoff orders with your balances, APRs, minimum payments, and extra monthly payment.
Debt avalanche calculator: compare two payoff orders
Use this tool as a debt avalanche calculator (extra money to the highest APR first) or a debt snowball calculator (extra money to the smallest balance first): enter your balances, APRs, minimum payments, and extra payment once to see both payoff timelines and total interest side by side.
We compute each month from the balances, APRs, required payments, and extra payment you enter; the model and its limitations are described in our methodology.
Avalanche Method
Pay minimums on all debts, then apply all extra money to the highest-interest debt. Once that's paid off, roll its payment to the next-highest rate. This minimizes total interest paid and is mathematically optimal.
Debt Snowball Calculator: The Snowball Method
Pay minimums on all debts, then apply extra money to the smallest balance. Once it's gone, roll its payment to the next-smallest balance. This builds momentum through quick victories and is psychologically powerful.
Avalanche vs Snowball Comparison
| Factor | Avalanche | Snowball |
|---|---|---|
| Total interest | Lowest | Slightly higher |
| Quick wins | Slower | Faster |
| Motivation | Moderate | High |
| Early payoff milestones | May be later | May arrive sooner |
Tips for Faster Payoff
- Put every windfall (bonus, tax refund) toward debt.
- Negotiate lower interest rates, a phone call can save hundreds.
- Consider balance transfer to 0% APR cards for high-interest debt.
- Once a debt is paid off, don't reduce your total payment, roll it forward.
When to Use This Calculator
- Starting a debt payoff plan: Enter all debts to see your current debt-free date and total interest cost.
- Evaluating extra payments: Find how much an extra $200/month changes your payoff timeline.
- Choosing a strategy: Compare avalanche vs snowball to understand the cost difference for your specific debts.
Real-World Examples
Compare a high-rate balance with a lower-rate loan: enter the actual balance, APR, and required payment for each debt, then compare the interest and first payoff date under both orders.
Compare several small balances: use the same total extra payment in both plans and look at the payoff order as well as total interest. The calculator does not decide which trade-off is right for you.
Limitations & Assumptions
- Models interest as APR divided by 12 on the remaining balance. Actual credit-card interest, minimum-payment rules, and timing vary by issuer.
- Applies each required payment and then the extra payment in the same monthly cycle; different payment dates can change a real account's result.
- Does not account for balance transfer fees, origination fees, or prepayment penalties.
Data Sources
For current consumer-credit conditions and account-specific rules, consult your lender's disclosures and the Federal Reserve G.19 Consumer Credit release. This calculator does not import lender-specific minimum-payment formulas.
Related Guides
- Financial Planning Basics - debt payoff strategies, emergency funds, and budgeting fundamentals
Related Data
If considering bankruptcy as a last resort, see state filing statistics at U.S. Courts bankruptcy. Explore credit union rates for debt consolidation at NCUA.
Disclaimer: This calculator provides estimates. Actual payoff times may vary based on interest calculation methods and payment timing. Consult a financial advisor for personalized debt management advice.
After you compare the two orders
What to do with the numbers
- If the avalanche/snowball interest gap shown is small, pick snowball - the psychological win of clearing a whole balance usually beats a marginal dollar saving.
- If the gap is large (several highest-APR cards well above your other debts), avalanche is worth the slower first win - re-check the exact dollar difference the calculator shows before choosing on feel alone.
- Once your first debt is cleared under either plan, feed its old payment back in as extra on the next debt immediately - the calculator assumes this roll-forward, a real plan that skips it will run longer and cost more than shown.
- Re-run the calculator whenever you get a raise or a windfall - even $50-100/month extra materially shortens the payoff date and total interest for both orders.
Methodology & Assumptions
This payment tool rearranges principal, rate, and term with closed-form amortization on the figures you enter. Escrow, PMI, and tax lines stay outside unless you model them as separate inputs below.
How this amortization node runs
Payment schedules rearrange principal, rate, and term with closed-form amortization. Escrow and PMI stay outside the payment identity unless you enter them as separate inputs. Published domain formulas
govern the identities; when an agency updates rates or thresholds we refresh defaults
and the page lastmod.
| Input | Default | Source / authority |
|---|---|---|
| Principal, rate, term | Domain-typical mortgage defaults | Published amortization identity |