A credit card statement that suddenly shows a higher interest rate can feel like it happened overnight, but federal law generally does not allow that. A card issuer that wants to raise the rate charged on new purchases has to warn the cardholder well in advance, giving time to shop for a better offer or simply stop using the card before the higher rate takes effect.
The 45-Day Rule for New Purchases
Under the Credit CARD Act’s advance-notice requirement, a card issuer generally must give a cardholder 45 days of written notice before raising the interest rate that applies to new transactions made with the card. Purchases charged more than 14 days after that notice arrives are treated as new transactions and can be charged at the higher rate; anything charged before that point typically keeps the lower rate. The notice itself is not a formality buried in fine print elsewhere; it has to specifically flag the coming change and the cardholder’s right to close the account before the new rate takes hold.
Why the First Year Works Differently
The 45-day window only applies once an account has been open for a full year. During that first year, a card issuer is generally barred outright from raising the interest rate on new transactions, aside from a small number of narrow exceptions written into the rule, such as an introductory rate expiring on schedule or a rate tied to an underlying index moving. That first-year protection exists because the CARD Act’s drafters wanted to stop lenders from luring cardholders in with an attractive rate and then repricing the account almost immediately. A retiree who opens a card for a specific promotional offer can generally count on that rate holding for at least twelve months, notice requirements aside.
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The Existing Balance Is Protected Differently
Money already charged to the card before a rate increase is treated more strictly than future purchases. A card issuer is generally not permitted to raise the interest rate on an existing balance at all, even with 45 days of notice, unless one of a short list of conditions applies: a temporary promotional rate, such as a low balance-transfer offer, is expiring on schedule after running for at least six months; the account carries a variable rate tied to a published index, such as the prime rate, and that index has risen; a payment has gone more than 60 days past its due date; the cardholder failed to hold up their end of an agreed workout plan meant to lower the rate; or Servicemembers Civil Relief Act protections that had been capping the rate have expired. Outside of those specific triggers, the balance a cardholder is currently carrying keeps its original rate even after a broader rate increase takes effect on new purchases.
What Happens After a Rate Goes Up
The protections do not end once a higher rate takes effect. An issuer that raises a cardholder’s rate after providing 45-day notice is generally required to reevaluate that rate at least once every six months, comparing it with the rate the issuer would currently offer a new applicant with similar credit. If the cardholder’s rate is higher than what a new customer would be charged today, the issuer has to lower it, though not necessarily all the way back to the original rate. A cardholder whose rate increase was tied to a late payment has an additional path back down: six consecutive on-time minimum payments made after the increase generally forces the issuer to reinstate the prior, lower rate.
What a Retiree Can Actually Do With the Notice
The 45-day window is meant to be used, not just acknowledged. A cardholder who receives one of these notices can call the issuer to ask what triggered the change and whether it can be avoided, pay down the balance before the increase applies to reduce how much interest accrues at the new rate, or use the notice period to apply for a different card and transfer the balance before the higher rate locks in on future charges. Anyone managing a fixed income, where an unexpected jump in a minimum payment can strain a monthly budget, generally benefits from treating that first notice letter as an action deadline rather than routine mail to be set aside.
This article was produced with the assistance of AI and reviewed by The Financial Wire editorial team.
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Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
