Debt Payoff Calculator: Snowball vs Avalanche
Determine how quickly you can eliminate all consumer debt by comparing the mathematical power of Avalanche with the momentum of Snowball.
Active Debts & Liabilities (3)
| Account Name | Current Balance ($) | Interest Rate (APR %) | Minimum Payment ($) | Action |
|---|---|---|---|---|
$ | % | $ | ||
$ | % | $ | ||
$ | % | $ | ||
| Total Combined Portfolio: | $28,000 | — | $660/mo | 3 Debts |
Strategy Comparison: Avalanche vs Snowball vs Minimums Only
| Strategy | Time to Debt Freedom | Total Interest Paid | Total Cash Outflow | Interest Saved |
|---|---|---|---|---|
| Debt Avalanche (Highest APR First)(Active) | 2 yr 8 mo | $3,740 | $31,740 | +$4,970 |
| Debt Snowball (Lowest Balance First) | 2 yr 8 mo | $3,740 | $31,740 | +$4,970 |
| Minimum Payments Only (No Extra Cash) | 5 yr 1 mo | $8,710 | $36,710 | $0 |
Milestone Elimination Order (AVALANCHE)
Worked Example: $28,000 Portfolio across 3 Accounts
A consumer holds three debt balances: a credit card of $6,000 at 24.99% APR (min $180), a personal loan of $8,000 at 11.50% APR (min $210), and an auto loan of $14,000 at 6.25% APR (min $270). The total minimum requirement is $660/month. By budgeting an additional $340/month ($1,000 total), they implement the Debt Avalanche strategy.
| Repayment Step | Strategy Mechanism | Outcome |
|---|---|---|
| Total Starting Debt | $6,000 (CC) + $8,000 (Personal) + $14,000 (Auto) | $28,000.00 |
| Combined Monthly Minimums | $180 + $210 + $270 mandatory monthly service | $660.00/mo |
| Extra Monthly Payment Added | Discretionary acceleration allocated to highest APR | +$340.00/mo |
| Target #1: 24.99% Credit Card | Receives $180 min + $340 extra ($520/mo). Eliminated in Month 8 | $0 (Month 8) |
| Target #2: 11.50% Personal Loan | Rolls over $520 + $210 min = $730/mo. Eliminated in Month 17 | $0 (Month 17) |
| Target #3: 6.25% Auto Loan | Rolls entire $1,000/mo budget to finish remaining balance | $0 (Month 31) |
| Debt-Free Date | Complete elimination in 31 months (vs 58 months with minimums) | 2 yrs 7 mo |
| Total Interest Saved | Total minimums interest ($10,037) − Avalanche interest ($5,067) | +$4,970.00 |
The Mathematics vs Psychology of Debt Elimination
The Debt Avalanche method allocates all discretionary cash beyond minimum payments toward the balance carrying the highest Annual Percentage Rate (APR). By tackling the highest compounding cost first, this method minimizes the total dollar amount paid in interest over time.
The Debt Snowball method, made famous by personal finance educators, orders debts by smallest balance regardless of interest rate. Research in behavioral economics confirms that rapid elimination of smaller accounts delivers psychological quick wins that dramatically improve long-term repayment adherence.
Exclusions & Key Assumptions
- No New Debt Accrual: This simulation assumes no new charges or balance increases are added to credit lines during the active payoff period.
- Fixed APR Assumption: Revolving credit card interest rates adjust with the Federal Reserve prime rate. Variable rate increases will adjust the timeline accordingly.
- Balance Transfers & Settlement: Balance transfer promotional APR periods (e.g. 0% for 18 months with 3% transfer fee) and debt settlement tax implications (Form 1099-C) are not modeled.
Méthodologie de calcul
Simulates month-by-month compound interest accumulation and rollover payment acceleration across multiple credit accounts.
Displays debt-free timeline, total interest savings versus minimum payments, and milestone payoff order.
Frequently Asked Questions (FAQ)
What is the difference between debt avalanche and debt snowball?
Avalanche targets highest-interest debt first to minimize total interest paid. Snowball targets smallest balances first to build psychological momentum.
Which debt payoff method is mathematically superior?
The avalanche method is mathematically optimal because eliminating high APR debt earliest saves the greatest total dollars in interest over time.
How does extra monthly payment accelerate freedom?
Every extra dollar goes 100% toward principal reduction, creating an accelerating compounding effect that cuts years off repayment timelines.