Debt Payoff Planner — Avalanche & Snowball Strategy
Enter all your debts, pick your payoff strategy, and see your exact payoff timeline with total interest saved. Ask the AI advisor how to get out of debt faster.
Your debts
Debt name
Balance
Rate
Min pay
Amount above minimums — applied to priority debt
Avalanche
3yr 4mo
$2,709 interest
Snowball
3yr 4mo
$2,709 interest
Debt free in
3yr 4mo
Total interest
$2,709
Interest saved
$8,089
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Assumes fixed interest rates and minimum payments. Actual payoff may vary. For educational purposes only.
Debt avalanche vs debt snowball — which strategy is right for you?
Both strategies use the same core mechanism: make minimum payments on all debts, then direct every dollar of extra monthly payment toward one target debt until it is gone. When the target debt is paid off, its payment is "rolled" into the next target — the snowball effect. The strategies differ only in how the target debt is chosen.
| Dimension | Debt Avalanche | Debt Snowball |
|---|---|---|
| Target order | Highest interest rate first | Smallest balance first |
| Total interest paid | Lower — mathematically optimal | Higher — interest accrues longer |
| Time to payoff | Faster overall | Slower overall |
| Psychological wins | Fewer early wins | Quick wins — first debt gone fast |
| Best for | Disciplined planners, large debts | Motivation-driven, many small debts |
| Risk of giving up | Higher in early months | Lower — early momentum builds habit |
The avalanche saves more money. The snowball saves more people. Research from Harvard Business Review (2016) found that people who used the snowball method were more likely to successfully complete their debt payoff plan because the early wins reinforced the behaviour. If you are confident you will stay the course, choose avalanche. If you need motivation, choose snowball.
How the debt roll (snowball effect) works
The power of both strategies is the payment roll. When Debt A is paid off, instead of pocketing the freed cash, you add Debt A's minimum payment to your extra payment on Debt B. As each debt is eliminated, the payment grows — creating accelerating momentum.
| Phase | Monthly payment to target | What happened |
|---|---|---|
| Start | $50 extra + $50 minimum = $100 | Baseline — paying minimums + extra on Debt 1 |
| Debt 1 paid | $100 + $75 minimum = $175 | Debt 1 minimum rolled to Debt 2 |
| Debt 2 paid | $175 + $100 minimum = $275 | Debt 2 minimum rolled to Debt 3 |
| Debt 3 paid | $275 + $150 minimum = $425 | Full force on final debt |
How much does an extra $100–$500/month matter?
Extra payments have a non-linear impact on debt payoff. The first extra dollar knocks out the highest-rate balance first. As that balance falls, less interest accrues each month — meaning a growing share of every payment attacks principal.
| Extra per month | Payoff time | Total interest | Interest saved |
|---|---|---|---|
| $0 (minimums only) | 8 years 2 months | $9,800 | — |
| $100 extra | 5 years 4 months | $5,900 | $3,900 |
| $200 extra | 4 years 1 month | $4,200 | $5,600 |
| $500 extra | 2 years 5 months | $2,100 | $7,700 |
Based on $20,000 total debt across 4 accounts, average 18% APR. For illustration only.
Where to find extra money for debt payoff
The reverse budget
Calculate your minimum monthly obligations (rent, utilities, groceries, debt minimums). Everything left is available for extra debt payments. Automate the transfer on payday before it gets spent.
The 24-hour rule
Before any non-essential purchase over $30, wait 24 hours. Cancel half of what you planned to buy. Even $150/month in reduced discretionary spending accelerates a $20,000 debt payoff by 14 months.
Windfall rule: 50%
Tax refunds, bonuses, work overtime, and gifts. Commit 50% of every windfall to debt before it reaches a general account. The other 50% goes to whatever you choose — this makes the rule sustainable.
Employer Section 127
As of 2026, employers can contribute up to $5,250/year tax-free to employee student loan payments. If your employer offers this and you have student loans, use it before any other strategy.
Balance transfer cards
0% intro APR balance transfer cards (typically 15–21 months) can freeze interest on credit card debt while you pay it down. Transfer fee is usually 3–5% — still worth it if the debt carries 20%+ APR.
Sell unused subscriptions
Audit every recurring charge — subscriptions, gym memberships, streaming services. The average household has 4–6 services they rarely use. $80–$150/month saved is 1–2 months off a typical debt payoff plan.
Related financial planners
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🏦 Loan Calculator
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🎓 Student Loan Calculator
See payoff timelines and interest for student loans
🏠 Mortgage Calculator
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📐 APR Calculator
Calculate the true cost including fees on any loan
Official resources and further reading
Consumer Financial Protection Bureau — Paying Off Debt
The CFPB's official guide to debt repayment, debt collection rights, and how to dispute errors on your credit report — essential reading before engaging with any debt collector.
Federal Trade Commission — Coping with Debt
The FTC's official guidance on debt management plans, credit counselling, debt settlement, and bankruptcy — covering what is legitimate and what to watch out for.
IRS — Employer Student Loan Repayment (Section 127)
IRS guidance on the Section 127 educational assistance benefit — employers can contribute up to $5,250/year tax-free to employee student loan payments, permanent through the SECURE 2.0 Act.
CFPB — Balance Transfer Cards Guide
The CFPB's official explainer on balance transfer credit cards — covering how 0% intro APR periods work, balance transfer fees, and what happens when the intro period ends.
Frequently asked questions
What is the debt avalanche method?
The debt avalanche method directs all extra monthly payment toward the debt with the highest interest rate first, while making minimum payments on all other debts. When the highest-rate debt is paid off, its payment is rolled to the next highest-rate debt. This is mathematically optimal — it minimises total interest paid across all debts.
What is the debt snowball method?
The debt snowball method targets the smallest balance first, regardless of interest rate. The psychological benefit is quick wins — eliminating a small debt entirely provides motivation to continue. Research shows the snowball method has higher completion rates for people who struggle with motivation, even though it costs more in total interest.
Should I pay off debt or invest?
The rule of thumb: if your debt carries an interest rate above 7%, paying it off is likely better than investing (since a 7% debt costs more than most after-tax investment returns). Below 5%, investing in a diversified portfolio often produces better long-term outcomes. For debt between 5–7%, either strategy is reasonable — personal risk tolerance and the psychological value of being debt-free often tip the decision.
What is a debt management plan (DMP)?
A debt management plan is a structured repayment program offered by non-profit credit counselling agencies (like NFCC members). The agency negotiates reduced interest rates with creditors and you make one monthly payment to the agency, which distributes it. DMPs typically last 3–5 years. Legitimate agencies are non-profit and charge nominal fees (usually under $50/month). Avoid for-profit "debt settlement" companies — these damage your credit and are often predatory.
How do extra payments get applied by credit card companies?
By law (Credit Card Accountability Responsibility and Disclosure Act of 2009), credit card companies must apply any payment above the minimum to the highest-interest balance first. However, for loans (personal loans, auto, mortgage), servicers may apply extra payments as "paid ahead" — advancing your next due date rather than reducing principal. Always specify in writing that extra loan payments should be applied to principal.