About one-fifth of Americans don't have any savings, according to a new survey.
The personal savings rate in the US has fallen since the 1980s, prior to which it routinely held in the double digits.
Savings have improved in recent years, but some Americans have said they would still have trouble paying for an unexpected $400 expense like a car repair.
About a fifth of Americans have no money tucked away for unexpected costs.
About 21% of working Americans said they aren’t saving any money at all, Bankrate found in a survey. Among those who are saving, a majority are putting away less than 10% of their income.
Over the past several decades, household savings in the US have been trending downward. By the Bureau of Labor Statistics' measure, Americans were saving 7.6% of disposable income in December. Before the 1980s, that rate had mostly been in the double digits.
Widening inequality has been one potential reason the personal savings rate has remained low by historical standards and compared with other countries, said Brian Rose, the senior Americas economist at UBS Wealth Management.
"Among lower-income households, they're mostly living paycheck to paycheck and even struggling to do that," he said. "So, they have no leeway in their finances."
While households have become increasingly prepared for unexpected expenses in recent years, according to a recent Federal Reserve survey, four in 10 Americans say they would have trouble covering a $400 expense like a car repair or fixing a broken appliance.
That doesn't mean Americans aren't trying to save, according to Jonathan Morduch, an economist at New York University and a co-author of "The Financial Diaries," a book detailing a study of the spending habits of 235 households over a year.
"The evidence we see is that households are often saving and then spending that down," he said. "So, when a fifth of Americans say they don't have any savings, it means they don't have any long-term savings."
That could be in part because Americans are struggling to pay off loans, with about 13% in the Bankrate survey citing debt as a reason they can't save. From car loans to tuition, Americans have increasingly struggled to make payments on the country's $4 trillion of consumer debt.
"How much does growing debt have to do with it?" Morduch said. "The answer is a lot."
In coming months, a lack of savings could become more serious for Americans. Economists widely expect growth to slow over the next two years, while some even expect the US to enter a recession by 2020.
"It’s clear that not everyone has benefited from the economic expansion," said Ryan Sweet, an economist at Moody's Analytics, said of the Bankrate savings survey. "Also, it shows we are not ready for the next recession."