Deferred interest payoff calculator
The answer
Clearing a $2,400.00 balance at 0% APR within 12 months needs $200.00 a month, finishing around Oct 2027 with $0.00 in interest.
- Total interest
- $0.00
- Total paid
- $2,400.00
An estimate from the inputs shown, not a promise of a particular date. How we calculate this.
Enter what is left on the promotional balance and how many months remain, and the answer above is the level monthly payment that clears it inside the window, where the numbers allow such a payment. Pay that amount, on time, every month, and the deferred interest is never charged.
A deferred-interest offer is not a rate that has been waived. If any of the balance is still there when the promotion ends, interest is charged back to the original purchase on what you owed in each month along the way — not only on what remains.
Assumptions
- Interest accrues once a month, before that month's payment.
- The APR stays at 0% for the whole term.
- No new spending, fees, penalty rate or promotional rate.
- You pay the payment above in full, on time, every month.
Month by month
What is left at the end of each month, after that month's payment — from the same engine run as the answer above.
| Month | Date | Balance |
|---|---|---|
| Start | Oct 2026 | $2,400.00 |
| 1 | Nov 2026 | $2,200.00 |
| 2 | Dec 2026 | $2,000.00 |
| 3 | Jan 2027 | $1,800.00 |
| 4 | Feb 2027 | $1,600.00 |
| 5 | Mar 2027 | $1,400.00 |
| 6 | Apr 2027 | $1,200.00 |
| 7 | May 2027 | $1,000.00 |
| 8 | Jun 2027 | $800.00 |
| 9 | Jul 2027 | $600.00 |
| 10 | Aug 2027 | $400.00 |
| 11 | Sep 2027 | $200.00 |
| 12 | Oct 2027 | $0.00 |
How a deferred-interest promotion works
Under a deferred-interest plan you pay no interest on the purchase if it is paid in full within the promotional period. If it is not, or if you fall far enough behind on a minimum payment, the issuer charges the interest that was being deferred — generally calculated for each month since the purchase on the balance you owed that month.
The minimum payment on these cards is usually not set to clear the balance within the promotion, so paying only the minimum is the common way to end up owing the interest after all. A level payment sized to the window, which is what the answer above works out, is what does clear it.
Medical financing cards
These promotions are common on medical credit cards offered at a provider's office. Before agreeing to a financing product for a medical bill, the Consumer Financial Protection Bureau's guidance is to ask about financial assistance and what insurance covers, since a provider may be required to offer assistance that reduces the bill outright.
Leave a margin
A payment that lands late, or a month that is missed, can end the promotion early. Planning to clear the balance a month before the promotion ends, and setting the payment up to go automatically, turns the estimate above into something with room for error. Adding new purchases to the same card can also complicate how a payment is applied; keeping the promotional balance on its own is the simplest way to know where you stand.
What this page is not
It is not a recommendation to take a financing offer, and Dang! Payoff earns nothing from any issuer. It is a way to see the payment that beats a deadline you have already agreed to, and to track it month by month if you save it as a plan.
Questions about this calculator
What rate should I enter for the promotion?
The rate your agreement says is charged during the promotion. On a deferred-interest offer that is normally no interest at all, provided the balance is cleared in time, which is how the example above is set; change it only if your agreement says interest is charged during the promotion.
Is this the same as an introductory APR offer?
No. With an introductory APR, interest starts only on whatever is left when the offer ends. With deferred interest, interest can be charged back to the purchase date if any balance remains. Your agreement says which you have.
How many months should I enter?
The months left until the promotion ends, counted from now. Entering a little less than the real time left gives you room for a payment that lands late.
Can I track the payments as I make them?
Saving this as a plan in Dang! Payoff lets you log each payment and see what is left. The calculator itself saves nothing.
Sources
- Consumer Financial Protection Bureau — I got a credit card promising no interest for a purchase if I pay in full within 12 months. How does this work?
- Consumer Financial Protection Bureau — What should I know about medical credit cards and payment plans for medical bills?
Our source and corrections policy explains how these are chosen.
Related
Reviewed 2026-09-19. Every figure on this page is produced by the same payoff engine the Dang! Payoff app runs, from the inputs shown, and is an estimate that holds only if the stated assumptions hold. The dates printed here were computed from a plan starting October 2026; the calculator re-anchors to the current month in your browser, so a date you read with JavaScript disabled is the one for that starting month rather than for today.
Dang! Payoff is a manual-entry debt payoff planner and tracker from Dang Apps LLC. It is not a lender, credit counselling agency, debt-relief, debt-management or debt-settlement service, and nothing here is financial, legal or tax advice or a recommendation about your situation. Your issuer’s or lender’s own terms govern your account.
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