Debt Payoff Calculator

Usually less time than the minimum payments suggest, provided the total monthly payment stays fixed until everything is gone. Each month a debt charges interest of roughly its balance times its APR divided by 12. The payment covers that interest first, and only the rest reduces the balance. A payment that barely clears the interest can keep a debt alive for a decade; every extra dollar goes entirely to principal.

The calculator opens on a common pattern for a couple in their early sixties: the tail of a 30-year mortgage, a home equity line used for a remodel, a car loan, and a card that took a large repair. Worked month by month:

The first row shows why a plan matters. On minimums alone, $400 a month against a $35,000 HELOC at 8.5% leaves it outstanding for 11 and a half years, long after the car and the mortgage are paid. Simply keeping the total at $2,170 and moving each finished payment to the next debt cuts that to under six years. Setting the payment up as one fixed monthly amount, rather than a list of separate minimums, is what makes the rollover happen.

Free of expensive debt, yes; free of every debt, not necessarily. The case for clearing debts before the last paycheck is about cash flow. In retirement, every dollar of loan payment has to come from Social Security, a pension or a portfolio withdrawal, and portfolio withdrawals from traditional accounts are taxed. A $1,050 mortgage payment funded from an IRA can need $1,300 or more of gross withdrawal. Lower fixed payments also mean a smaller withdrawal rate and less need to sell in a bad market.

Rank the debts by rate and by risk:

• Credit cards (often 20% or more). Clear them first, from savings if necessary. No investment reliably earns what a card charges.
• HELOCs and other variable-rate loans. The rate can rise after you retire, and interest-only draw periods end with a jump to full payments. Pay these down before the paycheck stops.
• Car loans. Usually a middle rate and a short term. Keep paying on schedule, or clear it with savings if you want the payment out of your retirement budget.
• A low-rate mortgage. At 3% to 4%, it can reasonably stay on schedule, especially if it ends within a few years. The case for paying it off is peace of mind and a lower withdrawal, which are real, not the interest saved.

Taxes rarely change the order. Mortgage interest only reduces tax if you itemize, and a married couple filing jointly who are both 65 or older have a 2026 standard deduction of $35,500 before any other senior deduction. With a small remaining mortgage, most retirees take the standard deduction, so the mortgage interest gives no tax benefit at all.

From savings, for any debt whose rate is clearly higher than what the money earns, once your cash reserve is protected. Paying off a balance is a certain return equal to its interest rate. In the default example, $20,000 from savings moved today clears the 22.9% card and cuts the 8.5% HELOC to $21,800. That saves $6,864 of interest against the same plan paid from income alone and finishes ten months sooner. The same $20,000 left in a money market fund at 4% would earn about $3,700 over those 51 months, before tax.

The limits are liquidity and taxes. Where the money comes from matters:

• Cash above your reserve. The simplest source. Keep one to two years of portfolio withdrawals in cash first; the retirement emergency fund calculator sizes it.
• A taxable brokerage account. Selling shares realizes capital gains. Sell lots with the smallest gains, or shares at a loss, first.
• A traditional IRA or 401(k). Every dollar withdrawn is ordinary income. Before 59½, an additional 10% tax may apply unless an exception fits (IRS). A large one-year withdrawal can also push income above a Medicare surcharge threshold; the 2026 surcharges are based on 2024 tax returns, starting above $218,000 for joint filers (CMS). The Medicare and IRMAA guide explains the brackets.
• A Roth IRA. Qualified withdrawals are tax-free, but Roth money is usually the last you should spend because it keeps growing tax-free and passes well to heirs. See the guide to retirement withdrawal order.

A middle path often works best: enough from savings to clear the high-rate balances today, and the rest from income on a fixed schedule. Enter both in the calculator and it shows the plan with and without the payment from savings side by side.

Less than the amount you pay. Avalanche (highest rate first) always costs the least interest; snowball (smallest balance first) closes accounts sooner. With the default debts and $20,000 from savings:

The gap is a few hundred dollars because the mortgage, the largest balance with the lowest rate, comes last under both methods, and the card is cleared by the savings on day one either way. What snowball buys is simplicity: at $600 extra it pays off the car loan in month 7 rather than month 28, which leaves three bills instead of four for most of the plan. If a variable-rate HELOC is on your list, avalanche also cuts your exposure to a rate rise sooner. Our snowball vs. avalanche guide covers the choice in depth.

It depends almost entirely on whether the payment is fixed or follows the issuer's minimum. Enter one card in the calculator with the amount you will pay each month. For an $8,000 balance at 22.9%:

Issuers set minimums with their own formulas; the first row uses one common style to show the effect. Because the required minimum shrinks as the balance shrinks, paying only what the statement asks can stretch a card over 20 years. Fixing the payment at today's amount, or better, clearing it from savings, ends it in months.

A 0% balance transfer can help if you will clear the balance before the promotion ends; count the transfer fee, usually a percentage of the balance, and enter the rate that applies afterwards if you might not. Watch for deferred-interest offers, often on store cards and medical financing, which charge all the back interest if any balance remains on the end date. Keep the card open once it is paid; an open account with a zero balance supports your credit score, which still matters for insurance pricing and any future refinance.

Treat them differently. A fixed-rate mortgage has a known payment and end date. A HELOC has a variable rate, and many allow interest-only payments during a draw period of around ten years, after which the line closes and principal and interest are due over the repayment period. A retiree who has been paying interest only can see the payment roughly double overnight. If you have a HELOC balance, find the end of the draw period on your agreement and aim to clear it before then.

Interest on a HELOC is deductible only if the money was used to buy, build or substantially improve the home that secures it, and mortgage interest overall is deductible only on the first $750,000 of home debt (IRS Publication 936). A HELOC used for a car, a card balance or a gift to a child gives no deduction at all.

For the mortgage, the decision is between a guaranteed return equal to its rate and the liquidity of keeping the cash. Near retirement, many people split the difference: they keep paying on schedule and add extra principal only from surplus income. If you plan to move or downsize within a few years, the sale will clear the mortgage anyway; the downsizing guide covers the arithmetic. The mortgage payoff calculator models extra payments on the mortgage alone.

Put it on the list, because the lender will look to you. Parent PLUS loans are in the parent's name, and a co-signed private student loan or car loan is your debt if the primary borrower stops paying. Defaulted federal student loans carry a risk that other debts do not: through the Treasury Offset Program the government can withhold up to 15% of Social Security benefits, while leaving at least $750 a month (CFPB). Collection policy has changed several times in recent years; confirm the loan's status with its servicer before you retire.

If you want to help a child pay down their own debt instead, that is a gift rather than a payoff plan. The guide to gifting to children and grandchildren covers the annual exclusion and how to structure it.

• Daily interest. Cards usually charge interest daily, which costs slightly more than the monthly figures shown.
• Rate changes. HELOC and card rates move with the prime rate. Re-run the plan when a statement shows a new APR.
• Fees and new charges. A late fee or a new balance on a card undoes a month of extra payments.
• Taxes on the money used. The calculator works with what reaches the lender. If the payment comes from a traditional IRA, withdraw enough to cover the tax as well.

Treat the payoff date as a target to check against your statements every few months, not a guarantee.