Finance calculator
Debt Avalanche & Snowball Calculator
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.
Methodology & Assumptions
This calculator implements standard formulas drawn from primary-source authorities. Values are point-in-time estimates; consult a licensed professional for high-stakes decisions. See the per-input definitions and source citations below.
How this works
Computations are deterministic and run client-side, no inputs leave your
browser. Formulas are derived from
standard published formulas for the calculator's domain (mortgage,
taxes, energy, conversions, etc.). When the underlying agency publishes
updated rates or thresholds we refresh defaults and update the page's
lastmod timestamp.
| Input | Default | Source / authority |
|---|---|---|
| All inputs | Domain-typical defaults | Editorial methodology, CalcMesh 2026 |