Debt Payoff Calculator

Avalanche vs Snowball: Which Strategy Is Right for You?

The debt avalanche method directs extra payments to the highest-interest debt first. This minimizes the total interest you pay — often saving thousands of dollars compared to minimum payments. Once the highest-rate debt is gone, you roll its payment to the next highest, accelerating the payoff of each subsequent debt.

The debt snowball method pays off the smallest balance first, regardless of interest rate. This eliminates accounts faster, providing motivational momentum. Research (notably from Harvard Business School) shows the snowball can lead to better long-term follow-through for some people — the psychological reward of eliminating a debt account is real.

The cost difference between the two strategies depends on your specific debts. For debts with similar balances and widely varying rates, the avalanche saves significantly more. For debts where the high-rate debt also has a low balance, the strategies may differ little in cost.

The Power of Extra Payments

Adding even $100–$200/month in extra payments dramatically reduces total interest and payoff time. The savings are amplified when the extra money targets high-rate debt. Use the Extra Monthly Payment field above and watch the total interest drop in real time.

Frequently Asked Questions

• Should I pay off debt or invest?
  If your debt's interest rate is higher than your expected investment return (typically 7–10% for stocks), paying off debt is the better guaranteed "return." High-rate credit card debt (18–30%) should almost always be prioritized over investing beyond your employer's 401k match.
• What is the minimum payment trap?
  Paying only minimums keeps you in debt for years or decades on high-rate debt. A $10,000 credit card at 22% with a $250 minimum payment takes nearly 6 years to pay off and costs about $5,600 in interest. Adding just $100/month cuts it to under 4 years and saves over $1,500.
• How do I add my debts to this calculator?
  The calculator starts with three sample debts (credit card, car loan, student loan). Edit the name, balance, interest rate, and minimum payment for each one, then click "+ Add Debt" for any additional debts. Results update instantly as you type.

Avalanche vs. Snowball: Two Ways to Pay Off Debt

When you carry several debts, the order you attack them in changes both how much interest you pay and how motivated you stay. The avalanche method targets the highest interest rate first, which mathematically minimizes total interest and gets you debt-free fastest. The snowball method targets the smallest balance first, delivering quick wins that build momentum even though it usually costs a little more in interest. This calculator runs both strategies on your actual debts so you can see the trade-off in dollars and months, then choose the one you'll stick with.

Worked Example

Imagine three debts: a $2,000 credit card at 24%, a $6,000 card at 18%, and a $5,000 personal loan at 11%, with $500 a month to put toward them beyond the minimums. The avalanche method hits the 24% card first, then 18%, then 11% — minimizing the interest that accrues on your largest, costliest balances. The snowball method clears the $2,000 card first regardless of rate, giving you a fast, visible victory that many people find keeps them going. Over the full payoff, avalanche typically saves the most, but if early wins are what keep you on plan, snowball can be the better real-world choice.

The Habit That Makes It Work

The mechanism both methods share is rolling payments forward: when one debt is paid off, you add its old payment to the next debt's payment instead of absorbing it back into spending. That growing "snowball" of freed-up cash is what accelerates the back half of the plan. The single biggest risk to either strategy is adding new debt while you pay down the old, so pairing the payoff plan with a pause on new charges is essential. Enter your balances above to see your debt-free date under each approach.

• Which is better, avalanche or snowball?
  Avalanche saves the most interest mathematically. Snowball can be more motivating because of early payoffs. The best method is the one you'll actually follow through on — the calculator shows the cost difference so you can decide.
• Should I consolidate my debts instead?
  Consolidation or a balance transfer can lower your rate and simplify payments, but watch for fees and promotional periods that expire. It works best when paired with a firm payoff plan and no new borrowing.
• Do I keep paying minimums on the other debts?
  Yes. You always pay at least the minimum on every debt to avoid penalties, then direct your extra money to the one target debt your chosen strategy prioritizes.