Every figure on this page assumes a 24% APR, the example rate on several of this site's calculator pages (an example, not an average), with nothing new charged to the card.
How long $20,000 of credit card debt takes to pay off depends on the payment and the APR. At 24%, the math says $500 a month takes 82 months (about 6.8 years) and $800 a month takes 36 months (about 3 years), while $400 a month never clears it. This site's credit card payoff calculator shows the time to pay off for your own balance, rate and payment.
The interest floor: $400 in month one at 24%
The numbers here use this site's calculator math: interest is added monthly at APR / 12, each payment counts at month end once that interest is in, and the payment stays the same throughout. At 24% APR the monthly rate is 2%. On $20,000, that comes to $400 of interest in month one, and each payment covers that interest before anything comes off the balance.
That makes $400 a floor. A payment of exactly $400 a month never pays the card off: it does not beat the interest, so the balance cannot fall. Most of the answer comes down to how far the payment sits above that floor. Above it, the split starts to move:
- At $500 a month, month one is $400 of interest and $100 off the balance.
- At $800 a month, month one is $400 of interest and $400 off the balance.
$20,000 at 24%: five payments, five payoff times
Here is what the math says for five fixed payments, if nothing new is charged:
- $450 a month: 111 months (about 9.3 years) and $29,930 of interest.
- $500 a month: 82 months (about 6.8 years) and $20,638 of interest.
- $600 a month: 56 months (about 4.7 years) and $13,288 of interest.
- $800 a month: 36 months (about 3 years) and $8,002 of interest.
- $1,000 a month: 26 months (about 2.2 years) and $5,797 of interest.
Read each line as two answers: how long the card takes, and what it costs in interest on top of the $20,000 itself. Close to the floor, the interest can outgrow the debt: at $450 a month, the interest comes to $29,930, more than the $20,000 balance. Further down the list, more of each payment reaches the balance from the first month on, and the totals drop.
Paying only the minimum on $20,000
Say the card's minimum is the month's interest plus 1% of what is owed, with a $25 floor. On $20,000 at 24%, the first minimum is $600, and $400 of it is interest. Because the minimum is based on the balance, it gets smaller as the balance falls, and the payoff stretches out: the math says 372 months (about 31 years) and $38,887 of interest if only the minimum is paid and nothing new is charged.
Keeping the payment fixed at that first $600 changes the picture: 56 months and $13,288 of interest, which is $25,599 less. That matches the $600 line in the list above, because a frozen minimum is simply a fixed payment. The minimum payment calculator runs this kind of math on your own card.
What about $30,000 of card debt at 24%?
The same math works on a bigger balance. For $30,000 of card debt at 24%, with nothing new charged:
- $600 a month: never pays off, because the payment does not beat the interest.
- $750 a month: 82 months and $30,957 of interest.
- $900 a month: 56 months and $19,933 of interest.
- $1,200 a month: 36 months and $12,003 of interest.
The months line up with the $20,000 list when the payment grows with the balance. $750 on $30,000 takes 82 months, just like $500 on $20,000, and $1,200 matches $800 at 36 months. At the same rate, what sets the date is the payment compared with the balance, not the size of the balance on its own.
What moves the date
The balance and the rate are already set, so the payment is the lever you control. Three things move the date:
- The payment. Adding $100 to a $500 payment cuts 82 months to 56 and $7,350 of interest. That is the step from the $500 line to the $600 line in the list above.
- The APR. Each point of APR shifts the payoff date, so the exact APR from your statement works better than a rounded guess.
- New charges. Every figure here assumes nothing new goes on the card. New purchases add to the balance the payment has to clear, which pushes the date later than the lists on this page show.
Would a balance transfer or a consolidation loan help?
Each one can change the math, and each one has a catch. This site's own examples use smaller balances than $20,000, so read them as illustrations of how the trade works, not as offers:
- Balance transfer. $6,000 at 24% moved to a 0% rate for 18 months with a 3% fee saves $1,377 at $325 a month. At $200 a month, though, $2,580 is still owed when the promo ends. The 0% rate runs out after 18 months either way, so the payment decides how much is left. The page Does a balance transfer actually save money? walks through both cases.
- Consolidation loan. $10,000 of 24% card debt paid off with a 12% loan over 36 months and a 5% fee saves $4,089. Running the cards up again afterward leaves you with both debts. The debt consolidation calculator shows the trade.
Run your own numbers
Take the balance and the exact APR from your latest statement and put them into the credit card payoff calculator with a payment you can keep up. Then run your own numbers again with a few other payments to see how the months and the interest move. This site's other debt calculators cover minimums, promo rates and consolidation. All of it is educational content rather than financial advice, and every example is an illustrative approximation, as the disclaimer explains.