If you want a more reliable cite, the Federal Reserve has studied this problem as well: https://www.federalreserve.gov/publications/files/2017-report-economic-w

If you want a more reliable cite, the Federal Reserve has studied this problem as well: https://www.federalreserve.gov/publications/files/2017-report-economic-well-being-us-households-201805.pdf https://www.federalreserve.gov/publications/files/2017-repor... "Four in 10 adults, if faced with an unexpected expense of $400, would either not be able to cover it or would cover it by selling something or borrowing money. This is an improvement from half of adults in 2013 being ill-prepared for such an expense."