Which debt should you pay off first?

If your bills are current and you have money beyond the required payments, targeting the highest-interest debt is generally the cheaper way to reduce interest. Paying the smallest balance first can give you a faster visible win.

Neither strategy works if making an extra payment leaves you unable to pay rent, buy groceries, or cover next week’s car repair, so size the extra payment to what you can keep paying every month.

Separate catching up from paying ahead

A past-due mortgage, an at-risk utility service, or a car payment needed to keep transportation to work deserves attention before a tidy interest-rate ranking.

Compare payoff strategies once essential expenses and all required payments are covered. If they are not, use the bill-priority guide and contact creditors about hardship options and other assistance.

Then make a list with the balance, APR, minimum payment, and any promotional end date for each debt. Use statements, not a remembered rate from when you opened the account.

Two common strategies, one concrete choice

Imagine these illustrative balances:

The required payments total $345. Suppose you can consistently budget another $150.

With an interest-first strategy, you pay the minimum on each account and put the extra $150 toward card A. Its payment starts at $330. For otherwise comparable debt and repayment assumptions, each extra dollar reduces more interest there than on a lower-rate balance.

With a smallest-balance strategy, the extra goes to card B, making its initial payment $185. You get rid of a whole account sooner, then redirect its payment toward the next target.

The CFPB describes both approaches and their trade-offs: going after the highest rate saves money over time, though progress can feel slow at first, while the smallest-balance method shows progress sooner but may cost more overall. The CFPB page also links a debt reduction worksheet for setting up either plan. Choose deliberately rather than switching targets whenever a different bill feels annoying.

Keep the payoff amount from quietly shrinking

As card balances decline, required minimums may decline too. If your household can still afford the original total payment budget, continuing that total can speed repayment.

In the example, the debt budget is $495: $345 in minimums plus $150 extra. When card B is paid off, add its former $35 minimum to the next target so it keeps working against the remaining debt instead of turning into new spending.

The exact payoff dates depend on interest calculation, changing minimums, fees, and whether you add purchases, so a deadline based on balance divided by payment will usually be too early.

Watch for an exception hidden in the terms

A promotional offer may have a deadline or deferred-interest provision that changes the consequences of waiting, a variable rate can rise, and a loan may have its own payment-allocation rules. Read those terms before you rank debts by their current APR alone.

Ask the lender how an extra payment will be applied and inspect the next statement. Federal Direct student loans show why: under the Department of Education’s rule, you can prepay all or part of a loan at any time without penalty, and most payments go first to accrued charges and collection costs, then to outstanding interest, then to principal. A prepayment equal to at least the monthly payment advances your next due date unless you ask the servicer not to, so make that request if you want a payment to stay due every month.

Avoid moving debt merely to create the appearance of progress. A balance transfer or consolidation loan adds another decision about fees, term, and your ability to stop adding balances.

Keep enough cash to avoid undoing the payment

Sending every available dollar to a card, then using the card again for an unavoidable expense, can become a costly loop. The CFPB’s emergency-fund guide points out that a one-time emergency paid with a card or loan can grow much larger than the original bill once interest and fees are added, and that even a small amount can provide some financial security.

There is no universal reserve amount for every borrower. Consider the likely interruption or expense you must handle and how soon more income arrives. Our emergency-savings guide helps you calculate that buffer from actual needs.

Write your plan on one page: required payments, the target debt, the extra amount, the cash you will retain, and the date you will review it.

Sources checked October 5, 2026. All worked examples are illustrative, not survey estimates. General financial education, not individualized financial advice.