Debt avalanche directs extra payments to the highest-interest debt first. Debt snowball starts with the smallest balance. Compare the interest paid, when each debt clears and whether the monthly payment plan leaves enough for ordinary expenses.
Keep the payment budget consistent
Both methods assume required payments continue on all debts while extra money targets one. When a debt is cleared, its freed payment goes toward the next. Comparing different total payment budgets would mix the effect of the strategy with the effect of paying more.
Start with each balance, interest rate, scheduled payment and any changing rate or special condition. Verify those against statements. A rough rate or missing loan can change which path looks favorable.
Avalanche: highest interest first
Avalanche targets the most expensive rate. Under otherwise comparable terms, directing extra money there reduces the interest accumulating on costly balances. It can take longer to clear the first debt if that balance is large.
Imagine a €6,000 card balance at 20% and a €1,000 loan at 5%. Avalanche targets the card with the extra payment while keeping the loan’s scheduled payment. This example identifies the priority; it does not estimate a payoff date without the rest of the payment terms.
Snowball: smallest balance first
Snowball would target the €1,000 loan first in that example, then add its freed payment to the money directed at the card. Clearing an account sooner can make progress more visible, but the higher-rate balance keeps accumulating interest in the meantime.
The
Consumer Financial Protection Bureau describes both approaches
: highest-interest-first can save money, while smallest-balance-first can provide earlier milestones. Which payment schedule you can maintain is part of the decision.
Include a cash cushion
A plan that sends every available euro to debt can leave no room for an irregular bill. If that bill puts the household back into borrowing, the forecast has missed an important part of the cash cycle.
Use realistic monthly expenses and a chosen cash cushion. Add known annual bills and planned purchases before deciding how much extra is available. Test a temporary income reduction or a large bill to see whether the repayment path remains workable.
Compare the paths inside Zenarios
The debt plan report compares avalanche and snowball in the household forecast. Set extra monthly payments and the cash to retain. Payments freed by repaid debts can roll into the next debt; selected recurring payments that end can also join the repayment budget.
Inspect the debt-free date, total interest and the first balance cleared. Also inspect cash flow. Zenarios limits extra repayments by the cash available above the cushion, so a promised extra amount may not be fully paid in a tight month.
Keep the current plan as a baseline and compare the strategy before adopting it in the scenario. The app models payments; it does not send them to lenders or negotiate new terms.
Check conditions the model cannot settle for you
Early repayment charges, promotional rates, overdue debts, secured borrowing and contractual restrictions can change the practical choice. Confirm what the lender permits. If the household cannot meet required payments, comparing extra repayment orders alone will not address the immediate gap.
Once a debt clears, specify what happens to its payment. It might fund the next debt, a cash reserve or a savings plan. Connecting that choice to the rest of the forecast helps make the debt-free date the start of another plan rather than the end of the analysis.
Common questions
What is the difference between debt snowball and avalanche?
Avalanche sends extra money to the highest-interest debt first. Snowball targets the smallest balance first. Both keep scheduled payments going and redirect freed payments to the next debt. Compare the interest cost, payoff timing and a payment schedule you can maintain.
Can Zenarios model extra repayments?
Yes. Zenarios can compare avalanche and snowball debt plans, with extra monthly money, a cash cushion and payments rolled from cleared debts into the next one. Check lender conditions and any early repayment fees separately.
Explore Zenarios
See the Zenarios financial planning features, explore life scenarios and financial decisions, or read about how Zenarios calculates your forecast and how your financial data stays private.
Try Zenarios in your browserWritten by the maker of Zenarios, a software engineer. These guides explain planning concepts and the product; they are not a personalized financial recommendation. Illustrative calculations are not results from your plan.