Debt Snowball Calculator

The debt snowball pays minimums on every account, then sends all extra money to the smallest balance regardless of APR. When that account zeroes out, its minimum payment rolls into the extra pool for the next smallest balance — like a snowball picking up mass downhill.

Defaults: Card A $800 @ 12% (min $25), Card B $2,500 @ 18% (min $75), Loan $6,000 @ 9% (min $120), plus $200 extra/month. Snowball attacks the $800 Card A first even though Card B's rate is higher — quick zero on A frees $25 minimum plus extra for the next target, producing psychological wins early.

Mathematically, avalanche (highest APR first) usually saves more total interest on the same debts and extra payment. Snowball may finish the first account sooner when the smallest balance is also low-rate — compare both calculators with identical inputs to see months and interest side by side.

Minimum payments must be realistic — issuers require them even while you focus extra elsewhere. Missing minimums triggers fees and credit damage. Enter each creditor's actual minimum from statements, not rounded guesses.

Common mistakes include ignoring promotional 0% cards that should stay open until promo ends, closing the first paid card if it hurts utilization, and stopping extra payments after the first win instead of rolling forward.

This model supports up to three debts for simplicity. Real households with more accounts can group smallest ones first manually or run multiple scenarios. Variable rates, fees, and new charges are not modeled.

Hybrid strategies exist — some pay the smallest high-rate store card first while snowballing the rest — this tool implements pure smallest-balance snowball only.

Tax deductibility of mortgage or student loan interest does not change snowball order here; after-tax APR adjustments are not applied.

Print the payoff order from the summary and tape it to the fridge — behavioral research suggests visible progress on the smallest balance keeps snowball adherents paying extra longer.

When a promotional 0% store card is smallest, snowball may still pay it first — consider avalanche on that card if promo expiry would spike APR.

Debt management plans through agencies negotiate lower rates — if enrolled, enter the plan payment and APR your counselor provides rather than raw card terms.

Celebrating each paid-off account without opening new debt keeps snowball momentum — the model assumes no new balances while paying down.

Minimum payment creep on cards as balance falls can free cash automatically — re-run when statements show lower minimums to see updated timeline.

Visual trackers coloring each debt as paid leverage snowball psychology — the order output gives you a checklist sequence.

If smallest debt is at 0% promo, still clear it before promo ends unless avalanche on higher APR saves more — compare both calculators.

Snowball order output helps automate extra payment targeting in budgeting apps — match the names you typed in each debt row.

Increase extra payment field when you get a raise — snowball accelerates nonlinearly as minimums roll forward.

Pause snowball extra during true emergency — restart when stable; the model assumes uninterrupted extra every month.

Closing paid cards hurts credit utilization — keep the oldest line open with a small recurring charge when safe to do so.

Snowball works best when extra payment is sacred — even $50/month above minimums beats perfect strategy with inconsistent follow-through.

Name debts in the form to match statements — clarity reduces sending extra to the wrong account by mistake.

Celebrate each paid-off line but avoid new debt on the cleared card — snowball fails if balances reload while you attack the next one.

Automate minimums on all cards and manually push extra to the snowball target — reduces missed payment risk on non-focus accounts.

Review snowball order quarterly as balances shift — smallest debt changes after partial paydowns on larger lines.

Gift windfalls can become one-time mega-payments — not modeled here, but they accelerate snowball the same as extra monthly cash.

Limits: planning illustration only — not financial advice. Behavior and cash flow matter as much as math; pick a method you will stick with consistently.