Debt Snowball Basics: Balance Order and a Fixed Monthly Budget
A snowball plan is a payment-ordering strategy, not a magic rate. This guide explains the deterministic rules behind our debt snowball calculator and points to CFPB debt-reduction education—without counseling you to choose snowball over any other approach.
What “snowball” means here
Debts are sorted by ascending starting balance (entry order breaks ties). Each month the model adds interest on each active balance, pays every entered minimum, then directs remaining budget to the first unpaid debt in that order. When a debt is paid, its former minimum stays inside the fixed total budget and rolls forward—the “snowball.”
Run an educational scenario
List each debt separately
Name, balance, fixed nominal annual rate, and required minimum.
Set extra monthly budget
Amount available beyond the sum of those starting minimums.
Check the interest gate
Each minimum must exceed first-month interest so the model never hides negative amortization.
Read the schedule
Payoff order, months, and interest are simulation outputs—not creditor promises.
Related borrowing worksheets
Single-loan amortization (including student loan repayment with optional extra payments) and HELOC draw/repayment scenarios use different engines. Open those tools when the product structure matters; do not force every balance into a snowball list without reading creditor rules.