For millions of Americans, credit cards are a double-edged sword: a convenient payment tool that, due to high interest rates, can also become one of the most expensive forms of debt. Despite this cost, a significant portion of users—about one-third—routinely carry a balance month to month, according to research from the Federal Reserve Bank of Boston.
But a crucial question arises: when borrowing costs climb, do consumers simply absorb the higher expense, or do they actually change their behavior? A new paper from the Boston Fed provides a compelling answer. The research found that cardholders do adjust their spending in response to interest rate changes, and the reaction is substantial.
Spending Cuts Follow Rate Hikes
The study revealed a clear pattern: on average, a one percentage point increase in a credit card’s annual percentage rate (APR) leads to a roughly 9% reduction in credit card spending the following month. Researchers characterized this as an “economically meaningful response.”
“It appears that many people do slow spending to the extent they can when interest rates go up,” noted Ted Rossman, senior industry analyst at Bankrate, commenting on the findings. He drew a parallel to consumer behavior at the gas pump, where price increases often prompt people to drive less and combine errands. “Consumer spending, therefore,, may be more rational than a lot of people realize.”
This spending pullback directly translates to a lighter debt burden for households. The Boston Fed calculated that a 9% decline in spending due to a 1% higher APR amounts to about $74 less charged per month, on average.
Who Adjusts the Most?
The response, however, is not uniform across all cardholders. The data shows a stark divide based on financial status.
“Financially constrained consumers … are most responsive,” explained Falk Brauning, a Boston Fed economist and co-author of the report. For those who regularly carry a balance—often a sign of tighter finances and limited access to other credit—a 1 percentage point APR jump can slash their spending by up to 15% the next month.
In contrast, consumers who pay their statement balance in full each month showed little to no significant change in spending when rates moved. As the report notes, this is intuitive: “If you are not paying interest, a higher interest rate does not directly increase the cost of your purchases.”
This divergence underscores what Rossman calls a “K-shaped economy,” where higher-income households (more likely to be transactors) continue to fuel economic activity while lower- and middle-income households (more likely to be revolvers) pull back.
How Your Credit Card Rate Moves
Understanding this link requires knowing how credit card APRs are set. They are typically pegged to the U.S. prime rate, which itself is generally set at 3 percentage points above the federal funds rate controlled by the Federal Reserve’s Federal Open Market Committee (FOMC).
Therefore, when the Fed adjusts its key rate, the prime rate follows, and credit card interest rates usually change within one or two billing cycles. After the Fed’s aggressive rate-hiking cycle in 2022 and 2023, the average credit card APR soared from just over 16% to a record high above 20%. While rates have since edged down to an average of about 19.58%, they remain near historic peaks, per Bankrate data.
This mechanism means Fed policy has a direct and rapid channel to affect household budgets. The Boston Fed’s research suggests this channel is more potent than some might assume, particularly for vulnerable borrowers.
The Fed’s Next Move and Market Signals
Since December, the federal funds rate target range has held steady at 4.25% to 4.50%, and credit card rates have stabilized. Futures markets, as tracked by the CME Group’s FedWatch tool, had long priced in a pause through the first half of 2024, with virtually no chance of a cut at the April meeting.
However, recent economic signals have shifted the conversation. Soaring energy costs and renewed concerns about “stagflation” (stagnant growth paired with high inflation) have increased the perceived probability of another Fed rate hike, with traders recently boosting the odds of an increase by the end of 2026.
Yet, Fed Chair Jerome Powell has offered a counterpoint, stating recently that “inflation expectations do appear to be well anchored,” suggesting the central bank may not need to tighten policy further imminently. The path forward remains data-dependent.
What is clear from the Boston Fed’s work is that when the Fed does act, its influence extends far beyond mortgages and business loans—it reaches directly into the weekly shopping decisions of a vast number of American households, especially those most stretched financially.
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