Direct answer
The debt snowball prioritizes the smallest balance for faster visible progress. The debt avalanche prioritizes the highest interest rate to reduce interest cost. Both require current minimum payments, an organized debt list, and attention to urgent obligations that may need to come first.
Start with a complete debt inventory
List every obligation with its current balance, interest rate, minimum payment, due date, payment status, and whether property secures the debt. Include credit cards, personal loans, student loans, vehicle loans, medical debt, tax debt, liens, a mortgage, and any HELOC. A vehicle lease is a contract and monthly obligation, but it is not paid down like an ordinary installment-loan balance. Rent is a housing expense rather than debt.
Keep required minimum payments current while using either payoff strategy. Before sending extra money to the mathematically preferred account, protect housing, utilities, insurance, transportation needed for work, court-ordered payments, taxes, and other obligations where missed payments could create an immediate legal or practical problem.
How the debt snowball works
Order eligible debts from the smallest balance to the largest balance without using the interest rate to set the order. Pay the required minimum on every debt, then direct all available extra money to the smallest balance. When that account is paid off, add its former payment to the amount directed toward the next balance.
The snowball can create faster visible wins and reduce the number of monthly payments sooner. That progress can be valuable when motivation and consistency are the main barriers. The tradeoff is that higher-rate debt may remain outstanding longer, which can increase total interest compared with the avalanche method.
How the debt avalanche works
Order eligible debts from the highest interest rate to the lowest rate. Pay the required minimum on every debt, then direct all available extra money to the highest-rate balance. After it is paid off, move the entire payment to the debt with the next-highest rate.
When the payment amount and timing are otherwise the same, the avalanche generally reduces the most expensive interest first and can produce the lowest total interest cost. Progress may feel slower when the highest-rate account also has a large balance.
Some obligations should be reviewed before either list
A simple balance or interest-rate ranking should not override an urgent risk. Past-due rent or mortgage payments, threatened utility shutoff, lapsed insurance, repossession risk, tax collection, court judgments, active liens, or a HELOC secured by your home may require attention before an ordinary unsecured debt.
If minimum payments are not affordable, contact the creditor or servicer before missing payments when possible. A nonprofit credit counselor, attorney, tax professional, housing counselor, or other qualified professional may be appropriate when delinquency, foreclosure, repossession, litigation, insolvency, or bankruptcy is possible.
A hybrid strategy is still a strategy
You can use a hybrid approach when it makes the plan easier to follow. One example is paying off one very small balance for immediate momentum, then switching to the highest-rate debt. Another is keeping the avalanche order but moving a debt forward when eliminating it would release a large required monthly payment.
The most useful plan is one you understand, can afford, and will follow consistently. Record the chosen order, the amount available above minimums, and the reason for any exception so the plan does not change impulsively from month to month.
Compare the two methods with a simple example
Suppose you have a $900 medical balance at 0%, a $3,000 credit card at 24%, and a $9,000 vehicle loan at 7%. The snowball starts with the $900 balance, then the credit card, then the vehicle. The avalanche starts with the 24% credit card, then the 7% vehicle loan, then the 0% medical balance.
The snowball removes one account sooner. The avalanche attacks the highest borrowing cost first. Either method is stronger when you stop adding new consumer debt, keep minimum payments current, maintain starter emergency savings, and roll each completed payment into the next target.
Sources and next step
Use the linked Rich Direction calculator to test your own assumptions. Results are general educational estimates, not individualized financial, lending, tax, legal, or investment advice.