What Is a Penalty APR?
A penalty APR is a much higher interest rate your card can switch to if you fall behind. Here is what triggers it, how high it goes, and how to get your normal rate back.
In short: a penalty APR is a higher rate, often up to 29.99%, that an issuer can apply after you pay very late. It usually takes a payment 60 or more days past due to hit your existing balance, and by law you get 45 days' notice. Pay on time for six straight months and the CARD Act requires your issuer to move your existing balance back to the normal rate.
What triggers a penalty APR
The most common trigger is a very late payment. For the higher rate to apply to your existing balance, you generally have to be 60 or more days past due. A single late payment can let the issuer apply the penalty rate to future purchases, but only with 45 days' advance notice. Some card agreements also allow it after a returned payment or going over your credit limit.
How high it goes
Penalty APRs are often capped at 29.99%, and the 2026 average is around 27.34%. That is well above a typical purchase APR in the low twenties, so on a large balance the extra interest adds up fast.
The timeline
Because the issuer must give 45 days' notice, there is a lag between the missed payment and the higher rate. Counting the 60-day delinquency plus the 45-day notice, it can be roughly 105 days from your first missed due date before a penalty APR actually starts.
What it costs
Say you carry a $2,000 balance at an 18% purchase APR, paying about $50 a month in interest. If a 29.99% penalty APR kicks in, that jumps to roughly $82 a month. Over six months, that is around $151 in extra interest for the same balance, on top of any late fees.
How to get your normal rate back
Here is the good news, courtesy of the CARD Act of 2009: if the penalty APR was triggered by a late payment, your issuer must review the account after six consecutive on-time payments and reinstate your original rate on the existing balance. They may keep the penalty rate on future purchases, so the cleanest fix is simply to stop triggering it. Paying on time, ideally with autopay, avoids it entirely.
This whole page assumes a consumer card. If yours is a business or corporate card, the CARD Act doesn't apply, so the 45-day notice and the six-month reinstatement rule aren't guaranteed. See what's actually different on a business card.
Frequently asked questions
What triggers a penalty APR?
Usually a payment 60 or more days past due for it to hit your existing balance. A single late payment can trigger it on future purchases with 45 days' notice. Some cards also apply it after a returned payment or going over your limit.
How high can a penalty APR be?
Often up to 29.99%. The 2026 average is around 27.34%, well above a typical purchase APR in the low twenties.
How long does a penalty APR last?
At least six months. Under the CARD Act, after six consecutive on-time payments your issuer must review the account and move your existing balance back to the normal rate, though they may keep the penalty on new purchases.
Does a penalty APR hurt my credit score?
Not directly. The late payment that triggers it can hurt your score once it is 30 or more days late and reported, but the higher rate itself isn't a scoring factor.
Disclaimer. This guide is for educational purposes only and isn't financial advice. Terms vary by card and issuer, so check your cardholder agreement, and consider a qualified financial advisor or a nonprofit credit counselor for help with debt.
Sources: NerdWallet, WalletHub, and Bankrate (triggers, rate, and the CARD Act reinstatement rule).
About the author
Credit Interest Calculator is part of Ready Utilities, founded by Cedrick Reese, a retired veteran and web developer who enjoys building free, user-friendly online tools that simplify everyday tasks. His journey began in the early 2000s with affiliate marketing and niche site development, which grew into a passion for creating practical digital utilities and calculators.
After retiring, he earned a Computer Systems Technician certificate from UEI College, completed Electro-Mechanical Technologies at Tulsa Welding School, and finished the Carpentry program at Florida State College at Jacksonville. Today he combines his technical background and craftsmanship by building furniture using traditional woodworking methods, gardening, and developing helpful online tools for users worldwide.