Debt Payoff Calculator
Use this debt payoff calculator to compare snowball vs avalanche, see how long until you're debt-free, and how much interest you'll pay. Enter your debts and extra payment to get a payoff timeline and payoff order.
With the snowball method you pay off the smallest balance first for quick wins; with the avalanche method you pay the highest interest rate first to save the most money. This debt payoff calculator shows your payoff timeline and total interest for both strategies so you can choose and stay on track.
How to use this debt payoff calculator
Add each debt (credit cards, loans, etc.) with its current balance, APR, and minimum monthly payment. Enter how much extra you can put toward debt each month and choose snowball (smallest balance first) or avalanche (highest interest first). The calculator shows how many months until you're debt-free, total interest paid, and the order each debt is paid off. Switch strategies to compare interest and timeline.
Your debts
Add each debt with its current balance, APR, and minimum monthly payment. Debts with zero balance are ignored.
Amount you can add on top of minimums toward one debt at a time.
Payoff results
Timeline and interest for your current debts with $200/month extra (avalanche).
- Credit Card A — paid off in month 12
- Credit Card B — paid off in month 16
- Personal Loan — paid off in month 24
This calculator assumes you make at least the minimum payment on each debt every month and put your extra payment toward one target debt at a time. Interest is modeled as APR ÷ 12, applied once per month to each balance before payments (a common simplification for comparing snowball vs avalanche).
The Consumer Financial Protection Bureau notes that many credit card issuers calculate interest daily using your average daily balance, so your actual interest may differ. Installment loans can use other methods. Use this tool for directional estimates and strategy comparison—not a substitute for your statements or loan contracts. CFPB: how card interest is calculated. Strategy descriptions align with the CFPB's debt reduction strategies overview.
How the snowball and avalanche methods work
With both methods you pay the minimum on every debt each month. The difference is which debt gets your extra payment. With snowball, you target the debt with the smallest balance first. When it's paid off, you roll that payment (minimum + the extra you were putting there) to the next smallest balance. With avalanche, you target the debt with the highest interest rate (APR) first, then the next highest, and so on. Avalanche typically saves more in interest; snowball can be more motivating because you see balances hit zero sooner.
Why use a debt payoff calculator?
A debt payoff calculator shows you how long it will take to become debt-free and how much interest you'll pay—so you can set a realistic timeline and see the cost of carrying debt. It also lets you compare snowball vs avalanche with your real numbers: sometimes the interest difference is small, sometimes large. Seeing the payoff order and total interest helps you decide which strategy fits your goals and motivation. Adding extra payment amounts shows how even a small increase can shorten your timeline and save money.
When to use snowball vs avalanche
Use avalanche if you want to minimize total interest and can stay motivated without quick wins—you'll pay the highest-APR debt first. Use snowball if you're more motivated by closing accounts and seeing small balances disappear; you'll pay the smallest balance first regardless of rate. For many people, snowball's psychological boost leads to better follow-through. Run both in this calculator: if the interest difference is small, snowball may be the better choice for you; if avalanche saves a lot, it might be worth the extra discipline.
Tips for paying off debt faster
Pay at least the minimum on every debt every month to avoid fees and damage to your credit. Put any extra toward one target debt at a time (snowball or avalanche). When one debt is paid off, roll that payment to the next so your momentum grows. Use this debt payoff calculator to see how much an extra $50, $100, or $200 per month shortens your timeline. Consider redirecting windfalls (tax refunds, bonuses) to debt. Avoid adding new debt while you're paying down existing balances. If you have high-interest credit cards, see if a balance transfer or lower-rate option makes sense—then use the calculator with the new rate to see the impact.
A balance transfer moves high-interest credit card debt to a new card at 0% APR for a promotional window — typically 15–21 months in 2026. The transfer fee (3–5%) is almost always far cheaper than months of high-interest payments.
| Card (2026) | 0% Window | Transfer Fee | Post-Promo APR |
|---|---|---|---|
| Citi Diamond Preferred | 21 months | 3% (first 4 mo) | 17.49–28.24% |
| Wells Fargo Reflect | 21 months | 5% | 17.49–29.74% |
| BankAmericard | 18 months | 3% | 16.24–26.24% |
| Chase Freedom Unlimited | 15 months | 5% | 19.74–28.49% |
The math: $6,500 balance at 21.52% APR (Federal Reserve Q1 2026 average)
Stay on existing card
18-month interest: ~$2,090
Transfer fee: $0
Total cost: ~$2,090
3% transfer (18 mo)
18-month interest: $0
Transfer fee: $195
Net savings: ~$1,895
5% transfer (21 mo)
21-month interest: $0
Transfer fee: $325
Net savings: ~$2,115
How to use this calculator with a balance transfer
- Enter the transferred balance with 0% APR
- Set the monthly payment to pay it off before the promo expires
- Use avalanche to prioritize this debt if you have others
- After promo ends, update the APR to the post-promo rate
Key rules
- • Requires 670+ FICO for most promo offers
- • New card opens = ~5–10 pt temporary score dip
- • Never use the new card for new purchases
- • Treat the promo deadline as your non-negotiable payoff date
Sources: Federal Reserve G.19 Q1 2026 (21.52% avg APR); WalletHub 2026 balance transfer rankings (verified May 2026); Citi and Wells Fargo issuer pricing pages.
The average U.S. household carries $11,507 in credit card debt (WalletHub/Federal Reserve, Q4 2025) at a 21.52% average APR (Federal Reserve G.19, Q1 2026). Minimum payments — typically 2% of the balance — are designed to keep you paying for decades.
| Payment Strategy | Monthly Payment | Payoff Time | Total Interest | Interest Saved vs. Min |
|---|---|---|---|---|
| Minimum only (2%) | ~$230 (declining) | 30+ years | ~$13,200+ | — |
| Minimum + $100/mo extra | ~$330 | ~6 years | ~$6,800 | ~$6,400 |
| Minimum + $200/mo extra | ~$430 | ~4 years | ~$4,400 | ~$8,800 |
| Minimum + $400/mo extra | ~$630 | ~2.5 years | ~$2,800 | ~$10,400 |
Why minimum payments are structured this way
Credit card minimum payments are deliberately set low — usually 1–2% of balance — which maximizes total interest revenue for issuers. At 21.52% APR, roughly half of each minimum payment goes to interest in the early months, leaving the principal barely touched. As the balance slowly falls, so does the minimum — creating a treadmill effect. The CFPB requires issuers to show a "minimum payment warning" on statements for exactly this reason, disclosing how long payoff takes at minimums only.
Interest estimates modeled at 21.52% APR on $11,507 balance with monthly compounding. Actual results vary. Sources: WalletHub Credit Card Debt Study Q4 2025; Federal Reserve G.19 Q1 2026; NY Fed Household Debt Report Q1 2026 ($1.25T total CC debt); CFPB Truth in Lending disclosure requirements.
Credit utilization — the balance-to-limit ratio on revolving accounts like credit cards — makes up ~30% of your FICO score, the second-largest factor after payment history. Paying down credit card debt doesn't just save interest; it can meaningfully raise your credit score within 30–45 days of your next statement closing.
Below 10%
Excellent
Optimal for score impact. Aim here.
10–30%
Good
Healthy range most lenders accept.
30–50%
Fair
Score impact begins at 30%.
50–75%
Poor
Noticeable score drag.
Above 75%
Very Poor
Major score penalty.
100%
Maxed out
Serious derogatory impact.
Per-card utilization matters, not just aggregate
FICO calculates utilization both per-card and across all cards. Having one card at 90% utilization with two others at 0% is worse for your score than having all three at 30% — even though total utilization is similar. This means paying down the card closest to its limit first (not necessarily the highest APR or smallest balance) can produce the fastest credit score improvement.
Snowball & credit score
Paying off small-balance cards closes accounts — which reduces available credit and can temporarily lower your score. Avoid closing paid-off cards; keep them at $0 and unused to maintain available credit.
Avalanche & credit score
Often targets high-APR cards, which are usually revolving credit cards. Reducing those balances improves per-card utilization. This strategy tends to be credit-score-neutral to slightly positive vs. snowball.
Sources: FICO® Score factors (myFICO); CFPB "What is a credit utilization rate?"; Equifax credit education. Score impact estimates are general ranges — actual results vary by credit profile.
Frequently asked questions
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Last updated: 2026-03-31 · Estimates only; not financial or tax advice.