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Debt Payoff Calculator (Avalanche vs Snowball)

Compare the avalanche method (highest APR first) and snowball method (smallest balance first) for paying off multiple debts. See months saved and total interest difference.

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Mathematically optimal method
Avalanche (highest APR first)
Saves ₹3,247 over snowball
Avalanche — months to debt-free
18 months (1.5 yrs)
Avalanche — total interest paid
₹48,549
Snowball — months to debt-free
18 months (1.5 yrs)
Snowball — total interest paid
₹51,796
Avalanche advantage (months)
0 months (same)
What this means

With 3 debts and ₹10,000 extra monthly, the avalanche method (paying highest APR first) clears all debts in 18 months and pays ₹48,549 in total interest. Snowball (smallest balance first) takes 18 months and ₹51,796. Avalanche saves ₹3,247.

* Avalanche is mathematically optimal but requires discipline — small early debts don't disappear quickly. Snowball gives faster psychological wins.

* Pick the method you'll actually stick to. The optimal-but-abandoned plan is worse than the slightly-suboptimal but completed one.

* Calculator assumes constant APRs and fixed minimum payments. Real-world: stop new spending on cards while paying down.

Quick answer

If you have multiple debts (credit card, personal loan, car loan), the order you pay them off matters. The avalanche method (highest rate first) saves the most money mathematically. The snowball method (smallest balance first) gives faster psychological wins. This calculator runs both for your specific debt mix and shows the rupee difference.

What is Debt Payoff?

Most people with multiple debts pay the minimum on each and direct any extra cash randomly — usually toward whichever debt feels biggest. Both the avalanche and snowball methods are systematic alternatives that almost always finish faster and cost less.

Avalanche — pay minimums on all, direct extra to the highest-APR debt. Mathematically optimal: minimises total interest. Snowball — pay minimums on all, direct extra to the smallest-balance debt. Behaviourally easier: closing accounts gives momentum and motivation.

How the comparison runs

Each month, the calculator pays each debt's minimum (~5% for cards, EMI for loans), accrues interest on the remaining balance, then directs the surplus to the priority debt. Avalanche prioritises by APR descending; snowball by balance ascending.

When the priority debt clears, its full payment (minimum + surplus) rolls forward to the next priority — the 'snowball' or 'avalanche' effect. By the end, all debts are paid; the difference is months saved and total interest paid.

Formula
Each month: minimum on all + extra to priority. Loop until all balances zero.
Avalanche priority
Highest APR firstminimises total interest
Snowball priority
Smallest balance firstfastest debt-elimination momentum
Worked example
Card 1₹50K @ 42%
Personal loan₹3L @ 14%
Car loan₹1.5L @ 9%
Extra/month₹10K beyond minimums
Avalanche: Card 1 → personal loan → car loan
Snowball: Card 1 (smallest) → car loan → personal loan
Avalanche saves ~₹35K interest vs snowball in this mix
Avalanche: ~28 months total. Snowball: ~30 months, ₹35K more interest paid.

How to use this calculator

  1. Enter each debt — balance and APR

    Card 1: ₹50,000 at 42%. Card 2: ₹30,000 at 38%. Personal loan: ₹3,00,000 at 14%. Etc. The calculator handles up to 5 debts simultaneously.

  2. Enter the extra monthly amount you can pay

    Beyond minimum dues across all debts, how much surplus can you direct? Even ₹5,000 extra per month dramatically shortens payoff vs paying just minimums.

  3. Read the comparison

    Calculator shows months to debt-free for each method, total interest paid, and the rupee savings of avalanche over snowball. Pick whichever you'll actually stick to.

When to use it

Multiple credit cards plus a personal loan

Common pattern: 2-3 cards at 36-46% + 1 personal loan at 14%. Avalanche aggressively kills cards first (highest rates), saving the most interest. Snowball can feel better if smallest card is tiny.

Family financial reset

If you've inherited an inconsistent debt mix from a partner or family situation, run the calculator to see the optimal payoff order rather than chipping away randomly.

Choosing whether to consolidate first

Sometimes a personal-loan-to-pay-off-cards consolidation (12-18% covering 36-46% card debt) beats both avalanche and snowball on the original mix. Use the credit card payoff calculator alongside this to compare.

Common mistakes to avoid

Spreading the extra payment evenly across all debts

Even ₹500 extra to each debt is far less effective than ₹5,000 concentrated on one. Concentration finishes the priority debt sooner and unleashes its full payment to attack the next.

Picking snowball when no card is small

Snowball's behavioural benefit comes from quick early wins. If your smallest debt is still ₹2 lakh and takes 18 months to clear, you don't get the momentum. In that case, just go avalanche.

Skipping the emergency fund while paying debt aggressively

If a medical emergency hits and you have no cash buffer, you'll go straight back into card debt. Keep at least 1 month of expenses liquid before going aggressive on debt payoff.

Frequently asked questions

Which is better — avalanche or snowball?
Mathematically, avalanche always wins by paying off highest-APR debt first. But behavioural research shows people quit debt repayment when progress feels slow — and snowball's quick early wins from killing small debts keep motivation. The right answer is whichever method you'll actually finish.
What is the minimum payment percentage on credit cards?
Indian credit cards typically charge 5% of outstanding balance as minimum (some 3%, premium cards 10%). The calculator uses 5% as default. If your card uses a different minimum, the results shift slightly but the avalanche-vs-snowball comparison stays valid.
Should I take a personal loan to consolidate cards?
Often yes. Personal loans run 12-18%, far below 36-46% on cards. If you have ₹2L+ card debt and 12+ months remaining, consolidation typically saves more than either avalanche or snowball on the original cards. Run the credit card payoff calculator to verify.
What if I can only pay minimums?
Set 'Extra monthly' to 0. The calculator still runs both methods but you'll see payoff takes 5-10× longer than with even a small surplus. ₹2,000-5,000/month extra dramatically changes outcomes.
Should I include my home loan in this calculator?
No. Home loans (8-10%) are far cheaper than credit cards (40%+) and personal loans (15%+). Pay home loan EMI as scheduled; direct any surplus toward higher-rate debts first. Once consumer debt is clear, then prepay home loan if surplus remains.
Does my credit score recover after I pay off debt?
Yes — typically within 3-6 months after each debt is cleared, your CIBIL score rises 30-50 points. Closing accounts after payoff can briefly hurt if it shortens your credit history; keep oldest cards open with zero balance for credit-mix benefit.
Disclaimer: This calculator assumes constant APRs and minimum payment percentages. Real card statements include GST on interest, late fees, and over-limit charges. Real-world payoff usually tracks within 5-10% of calculator predictions when followed consistently.

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