Debt Payoff Calculator

How long a debt takes to clear

A credit card statement tells you the minimum payment. It rarely tells you how long that payment keeps you in debt. This calculator answers that: enter a balance, an interest rate and the amount you pay each month, and it works out the number of payments, the payoff date and the total interest.

The mechanic is simple and slightly cruel. Each month the issuer adds interest to the balance, then subtracts your payment. Early on, most of your payment goes to interest and little touches the principal. As the balance falls, the interest charge falls with it, so more of each payment goes to principal and the process speeds up on its own.

What that means in practice: the first year of a payoff feels like nothing is happening, and the last year goes quickly. Everything runs in your browser, the numbers you type are never uploaded or stored.

Worked example: $5,000 on a card at 22% APR

Take a $5,000 balance at 22% APR paying $200 a month.

The monthly rate is 22% ÷ 12 = 1.8333%. In month one the interest charge is $5,000 × 0.018333 = $91.67. Your $200 payment clears that and knocks $108.33 off the balance, leaving $4,891.67.

Run that loop to the end and the debt clears after 34 payments, about 2 years and 10 months. Total interest is $1,749.88 and the total you hand over is $6,749.88.

Now look at what a small change does. Push the payment to $250 and the debt clears in 26 months with $1,285.72 in interest. That is eight months of your life back and $464.16 saved, for $50 a month. Push it to $300 and you finish in 21 months with $1,021.60 in interest.

What the payment size does to the timeline

The same $5,000 balance at 22% APR behaves differently depending on how much you send each month. Notice that doubling the payment from $100 to $200 does far more than halve the time.

Read the first two rows again. Going from $100 to $150 a month, an extra $600 a year, removes 85 months and $5,880.01 of interest from the total. There is no investment on earth that reliably returns that much. Paying down a 22% card is the highest guaranteed return most households will ever see.

The minimum payment trap

Minimum payments are designed to keep an account current, not to clear it. On the $5,000 balance at 22%, the monthly interest is $91.67. A $100 minimum payment therefore reduces the principal by $8.33.

Run that to the end: 137 months, more than eleven years, and $8,678.06 in interest, which is more than the original balance. You would pay $13,678.06 for $5,000 of spending.

It gets worse if the minimum is calculated as a percentage of the balance, because the required payment shrinks as the balance falls. Many US card minimums are the greater of a flat amount, often $25 to $35, or a percentage like 1% of the balance plus interest. That structure means the debt has a floor: as the balance drops, so does the payment, and the payoff stretches out further.

The fix is to fix the payment. Choose a dollar amount and keep paying it even as the minimum drops. That single habit is the difference between 34 months and 137.

Different debts, different clocks

The rate matters as much as the payment. Here is what a range of realistic US debts looks like at a fixed monthly payment.

Two things jump out. First, the store card at 29.99% costs $1,336.17 in interest on a $2,000 balance, two thirds of the original amount. Second, the car loan at 6.5% takes longer to clear than the credit card but costs proportionally far less interest, because the rate is low. High rate beats long timeline as the thing to attack first.

Avalanche versus snowball, and the balance transfer question

If you have more than one debt, two strategies dominate.

• Avalanche: pay minimums on everything, throw every spare dollar at the highest interest rate. It costs the least and finishes fastest, but the first win can be months away.
• Snowball: pay minimums on everything, throw every spare dollar at the smallest balance. It costs slightly more in interest but clears an account quickly, which keeps people going.

The difference is usually one to three months and a small amount of interest on a typical three-card household. The strategy you finish beats the strategy that is mathematically optimal.

Balance transfers. Moving a high-rate balance to a card with a 0% promotional rate is one of the few legitimate shortcuts. Transferring $5,000 usually costs a fee of about 3%, so $150. Paying it off over an 18-month promotional window means $277.78 a month, and total cost is $150 instead of $1,749.88 in interest. The catch is the window: whatever is left when the promo ends goes back to a normal rate, often higher than the one you left.

Debt consolidation loans work the same way. Cutting the rate on $5,000 from 22% to 12% while paying $200 a month shortens the payoff from 34 months to 29 and saves roughly $600 in interest. The risk is trading unsecured debt for debt that may be secured against something you own.

What this calculator does not cover

The math here is exact for a fixed-rate balance with a fixed monthly payment. Real life adds a few things it ignores.

• New charges. Any spending you add to the account resets the clock. Most successful payoffs start with the card out of the wallet.
• Variable rates. Most US credit cards have variable APRs tied to the prime rate, so your rate can change with no notice. Re-run the numbers if it moves.
• Fees. Late fees, annual fees and over-limit fees all go straight onto the balance.
• Promotional rates that expire. A deferred-interest offer can retroactively charge interest on the whole purchase if you miss the deadline by a day.

And the important one: this is not personal tax, legal or financial advice. It applies a standard amortisation formula to the numbers you type. It does not know your income, your credit score, your state's rules on debt collection, or whether a settlement offer on the table is a good idea. Cancelled debt over $600 can be taxable, which the IRS explains in its guidance on cancelled debt, and your rights when a collector calls are set out by the Consumer Financial Protection Bureau. For anything that will show up on your credit report or your tax return, talk to a licensed professional or a nonprofit credit counsellor before you act.