Almost a third of Millennials would consider leaving their partner if they found out they had hidden debts, a new survey has revealed.

The fifth annual Love and Money survey by US based TD Bank polled 1,753 people who are married, in a committed relationship or divorced to determine how money factors into these relationships.

Despite finding 31 per cent of Millennials saying they would consider a breakup if they found a secret credit card debt or bad credit score, 27 per cent of Millennials said they were keeping a financial secret from their significant others.

The biggest financial secret Millennials are keeping is credit card debt, with 48 per cent of respondents admitting they are hiding some.

Additionally, 72 per cent of Millenia, respondents admitted they sometimes make irrational money decisions even when they know it isn’t a good idea.

Millennials are also more likely than other generations to fight with their partners about money, with 40 per cent of respondents aged between 23 to 38 admitting they fight with their partner about money at least once a week.