How the snowball lines up your debts
The snowball method sorts debts by one thing only: the size of the balance. The smallest balance goes first, the largest goes last, and interest rates play no part in the order.
Every debt still gets its minimum payment each month. Any money beyond the minimums goes to the debt at the top of the list. Once that debt reaches zero, the next smallest balance becomes the new focus.
Where the rolling payment comes from
The name comes from what happens after each payoff. A paid-off debt's minimum does not vanish from the budget. It joins the extra and moves to the next debt, so the payment aimed at the focus debt grows each time something is cleared.
A small example shows the pattern:
- The smallest debt has a $40 minimum, and there is $100 of monthly extra. That debt receives $140 a month.
- When it is paid off, the next debt receives its own minimum plus that $140.
- When that one is gone, its minimum joins the pile too, and the amount keeps building.
The final payment on a debt is often smaller than the full amount available. In the calculator, whatever is left over that month spills to the next debt right away rather than waiting for the following month.
Why some people choose it
The snowball is built around early, visible progress. Small balances can disappear within months, and each one removes a bill, a due date and a statement from the pile.
Some people find that a closed account is easier to feel than a lower interest charge. A string of quick payoffs can make a long plan seem more manageable, and fewer accounts can make the monthly routine simpler to track. Others care less about those wins and focus on the dollar cost instead. Both views are about what keeps a plan going, which the calculator cannot measure.
The interest trade-off, in plain terms
Because the snowball ignores rates, it can leave a high-rate balance waiting while smaller, cheaper debts are cleared first. During that wait, the high-rate debt keeps charging interest on its full balance.
How much that costs depends on the debts. If the smallest balance also carries the highest rate, the snowball and the interest-first approach pick the same order and the cost is the same. If the largest balance carries the highest rate, the gap tends to be wider. The debt avalanche calculator runs the interest-first order, and the snowball vs avalanche calculator shows the difference for the same set of debts.
Reading your snowball timeline
The results list each debt in the order it is cleared, with its payoff month. The gaps between those months are worth a look. The first payoff often comes quickly, and later gaps can stretch out because the remaining balances are larger.
The final row gives the debt-free month, the total interest paid and the total paid overall. Changing the monthly extra and watching those dates shift shows how sensitive the timeline is to the amount going in.