What Happens If You Miss the Deadline

The Moment the Deadline Passes

A deferred-interest promotion is a quiet countdown. For the whole promotional window — 6, 12, 18, or 24 months — your lender has been calculating interest on your balance every single month and setting it aside in a reserve you never see on your statement. Reach a $0 balance before the deadline and that reserve is wiped out, so you genuinely paid no interest. The instant the deadline passes with any balance remaining, the deal flips.

At that moment the lender takes the entire accrued reserve — every month of interest, backdated to your original purchase date and calculated on the full original purchase amount — and posts it in one lump charge. It does not matter how much you have already paid down; the penalty is the same whether you owe $1 or $1,000 at the cutoff. From that day forward, your remaining balance also begins accruing ongoing interest at the standard APR, which for CareCredit is 26.99% as of 2026 and runs 26.99%–29.99% on most Synchrony store cards.

A Worked Example

Say you charged a $4,000 purchase to an 18-month deferred-interest promotion at 26.99% APR and paid it down to $1,200 by the deadline — real progress, but not zero. Here is what posts overnight.

Look closely at what happened. You owed $1,200; overnight you owe $2,350 — almost double — because the interest was calculated against the full $4,000 over the entire 18 months, with the heaviest charges coming from the early months when the balance was largest. The $2,800 you already repaid did nothing to reduce the penalty. That is the part that surprises people: the penalty is based on the original purchase, not on what is left.

What It Looks Like on Your Statement

The charge usually appears as a single line item labeled "Deferred Interest," "Promotional Interest," or "Accrued Interest — Promotion Expired." It is dated to the close of the billing cycle in which your promotion ended, even though the amount represents months of accrual reaching back to your purchase. This is the first time the reserved interest becomes visible — and it can be a shock. Find that exact line and note the date and amount; you will need both if you call to ask for relief.

Does It Hurt Your Credit Score?

The deferred-interest charge itself is not a missed payment, so it does not directly create a derogatory mark. But it can still drag your score down through one mechanism: credit utilization. When the lump charge posts, your balance jumps, and if that pushes the balance closer to your credit limit, your utilization ratio rises. Utilization is one of the largest factors in your score, so a sudden balance spike on a card with a modest limit can cost you points until you pay it back down.

One important distinction: missing the promotional deadline is not the same as missing a payment. As long as you kept making at least the minimum each month, your payment history stays clean even though the promotion expired. You only take a true late-payment hit — the kind that lingers for years — if you also missed the minimum due. Keep paying the minimum no matter what, even in the month the penalty lands.

Can You Get the Charge Removed?

Sometimes — but go in with realistic expectations. The interest was charged per the terms you agreed to, so the issuer is not obligated to reverse it. That said, a one-time courtesy reversal is a real thing, especially with a clean payment history and a near-miss.

For a CareCredit account, you are calling Synchrony Bank. Here is a practical approach:

1. Call the number on the back of the card and ask specifically for a "one-time courtesy reversal of the deferred interest" or to speak with someone about a "hardship" or "promotional balance" adjustment.
2. Be calm, brief, and specific. Say something like: "My promotion ended on [date] and I was charged $[amount] in deferred interest. I've never missed a payment. Can you offer a one-time courtesy reversal, or extend the promotion so I can finish paying it off?"
3. Have a paydown plan ready. If you can say "I can clear the remaining balance within 30 days," you give the rep a reason to help. Some agents can re-age, extend, or partially credit an account; many cannot, but the first rep is not always the final answer.
4. If the first agent says no, politely ask for a supervisor or call back another day. Outcomes vary by representative.

Realistic odds: a full reversal is uncommon, a partial credit or short extension more achievable, and your strongest leverage is a spotless payment record. It costs nothing but a phone call, so always ask.

The CARD Act Rule That Matters Near the Deadline

Federal law gives you one protection in the home stretch. Under the Credit CARD Act of 2009, during the final two billing cycles of a deferred-interest promotion, any payment you make above the minimum must be applied to the deferred-interest balance first. Outside that window, issuers can direct extra payments to whichever balance carries the lowest rate, leaving your promotional balance untouched.

So if you carry multiple balances on the same card, your extra payments in those last two cycles are guaranteed to chip away at the balance that actually faces the penalty. Throw everything you can at the card in the final two months — the law is finally on your side.

Your Options If the Deadline Is Days or Weeks Away

If the cutoff is close and you cannot wipe the balance to zero with cash on hand, you still have moves — each one shrinks or escapes the retroactive penalty before it posts.

• Pay the remainder in full. If you can pull the money from savings, do it. Confirm the payment posts before the deadline — not just that it is scheduled — because bank transfers can take a few business days. Pay several days early to be safe.
• 0% balance transfer. Move the balance to a card with a genuine 0% intro APR before the deadline. A 3–5% transfer fee is almost always far less than the deferred interest on a large balance.
• Personal or debt-consolidation loan. A fixed-rate loan in the 8–15% range is far cheaper than letting a balance sit at 26.99%–29.99% after the penalty. Use it to pay the promotion to $0 before the deadline.
• Partial paydown to shrink the damage. If you truly cannot reach $0, paying down as much as possible still helps with one thing — it lowers the balance that will accrue ongoing interest after the penalty. It will not reduce the retroactive charge itself, but it limits the bleeding from that point forward.

If You've Already Been Hit: A Recovery Plan

The penalty posted and the balance is bigger than expected. Do not ignore it — at 26.99%–29.99% ongoing, this is among the most expensive debt you can carry, so the priority is to kill it fast.

1. Make the call first. Before anything else, ask Synchrony for the one-time courtesy reversal described above. Best-case, the charge partially or fully disappears. Worst-case, you are exactly where you started.
2. Keep paying at least the minimum every month so you never add a late-payment mark on top of the interest.
3. Refinance off the high APR. A 0% balance transfer or a fixed-rate personal loan stops the 26.99%–29.99% meter and gives you a defined payoff path. Even with a transfer fee, the math almost always favors moving it.
4. Attack it with a fixed monthly payment. Pick an amount that clears the balance in a set number of months and treat it like a bill, not a minimum.
5. Watch your utilization. As you pay it down, your score should recover from the temporary balance spike — there is no permanent scar from the charge alone.

Related: Deferred Interest Calculator · CareCredit Deferred Interest, Explained · Deferred Interest vs. 0% APR · Charged Interest After Paying It Off · Getting the Charge Waived