More than 2,000 people took part in a survey which also revealed that 13 per cent of us find payday itself the most worrying day of the month.
It also found one in three people felt nervous or physically sick when checking their bank account.
Joe Popplewell from Christians Against Poverty (CAP) explained: "A lot of people find it stressful to pay for various outgoings. When the money comes in, they know that it will immediately go out. Often if they've not budgeted it's very troubling."
The survey - which was conducted by the digital bank Atom - also found that 66 per cent of us either don't make or are unable to stick to our monthly budgets.
For those worried about their financial situation, CAP reminds them that there are ways to seek help.
"CAP life skills ministries will help people live well on a low income," said Popplewell, "When people have an understanding of how to do something, it becomes a lot easier.
"CAP courses teach people over three weeks about how to manage finances. Teaches you how to set up a savings account, having an outgoings account, current account. The course is really effective."