The U.S. consumer has seemed unstoppable in recent years, spending throughout soaring inflation and the highest borrowing costs in decades. That resilience helped keep at bay a recession that many thought inevitable after the pandemic.

President Donald Trump’s tariffs and their scattershot rollout have once again raised concerns that the United States may soon face an economic downturn. While the odds of an outright recession have fallen as the highest levies have been paused, there are reasons to be worried about consumers’ ability to continue to prop up growth.

Consumer spending accounts for more than two-thirds of U.S. economic activity, meaning a sharp enough pullback could cause significant damage.

For now, consumers are still spending, although more slowly than in the past. Their attitudes about the economic outlook have soured in recent months in anticipation of elevated prices, slower growth and higher unemployment. Americans also have become choosier about how they spend their money. Leisure and business travel has declined. People are buying fewer snacks and eating out less as they look to cut costs. They are even doing fewer loads of laundry to save money.

“The economy is really vulnerable to anything that could go wrong, and clearly there’s a lot that could go wrong,” said Mark Zandi, chief economist of Moody’s.

It is not yet clear if the slowdown simply reflects distortions related to stockpiling before Trump’s trade war starts to really bite or if it is an early sign of a full-blown retreat.

Part of what has enabled consumers to spend so freely up until this point is a stockpile of savings they accrued as a result of government stimulus payments during the pandemic and a booming stock market. Those savings have now largely been tapped out.

“The cushion that was there during the pandemic to weather the storm of higher prices is not there now,” Diane Swonk, chief economist at KPMG, said. The highest-earning 10% of Americans, who drive the bulk of consumer spending, are still in good shape, but it’s the bottom 90% of earners who worry her most.

Those households are under increased financial stress.

The share of outstanding credit card debt that is 90 or more days past due started increasing in 2023 and has continued to rise across geographies and income levels, according to data through the first quarter of this year released Tuesday by the New York Fed and research by the St. Louis Fed. The trend has become particularly pronounced for poorer households.

And real-time credit reports from Experian, one of the three major U.S. credit rating firms, suggest the pace accelerated in April.

Americans are struggling with other kinds of payments, too. The overall delinquency rate, which includes all loan types, reached its highest level since 2020 in the first quarter of this year, according to the Federal Reserve data. This was driven by student loan delinquencies, as past-due student loans were included in credit reports after a pandemic-era pause on federal student loan repayments.

Because they now have to pay down those balances after a five-year reprieve, consumers may increasingly have trouble servicing other kinds of loans, another strain.

What matters most, however, is the labor market. “If American consumers have money, they’re going to spend it, and the primary place they get money is through their jobs,” said Eric Winograd, an economist at investment firm AllianceBernstein.

Businesses are still hiring, layoffs are low and the unemployment rate has stabilized at a historically low level of around 4%. But the labor market is noticeably less robust than it was after the pandemic, a period that was marked by booming hiring, soaring wages and acute worker shortages.

“Nothing emboldens consumers quite like a strong labor market, and we don’t have that anymore,” said Tom Porcelli, chief U.S. economist at PGIM Fixed Income.

Companies are posting far fewer job openings, and positions are no longer much more plentiful than the number of people looking for work as businesses reassess their staffing needs in an environment of slowing growth.

Spending is now consistently increasing faster than income, once adjusted for inflation. This imbalance cannot last, said Neil Dutta, head of economic research at Renaissance Macro. Either incomes will need to accelerate or consumption must slow over time.

“Given what we know about the job market and wage growth, it’s more likely that consumer spending slows than incomes rise,” he said.