Some 51% of those in a relationship have been kept in the dark about their partner's loans and overdrafts, a new survey has revealed.
Worse still, some 6% admit to splitting up with their partner due to rows about money, according to survey findings by credit report company Experian.
Break-ups caused by financial worries are most prevalent in the 25- to 34-year-old age group.
When it comes to how much couples earn, more than two-thirds (69%) of respondents know their partner's annual salary, while only 23% are aware that their partner has received a work bonus.
And it seems that people also keep their bank account details to themselves, with just 43% knowing how many accounts their partner held.
Only 44% are privy to their partner's credit card debt and 38% know their partner's levels of overdraft and loan debt.
On a more positive note, 56% of people are aware of how much savings their other half had accrued.
However, almost a third of Brits are not too influenced by their partner's financial behaviour: 29% of people are indifferent to partners who spend above their means, with this rising to 35% among men.
Choice of career is not a big factor in picking a partner either, with only 26% finding their partner more attractive if they had a good career. This was more important for women, with 31% of females admitting a man who pays his bills on time as "much more attractive", compared to only 19% of males.
Surprisingly, more than two-thirds (68%) of those surveyed claim that a high salary makes no difference to how attractive they find someone. This was more important for women, with 24% saying a high salary made a man "somewhat more attractive" compared to 16% of males. Some 10% of women believe a high salary makes a man "much more attractive".