The poll for LittlewoodsBingo.com found that women are more likely to take the split call after scooping a jackpot.
The survey discovered that almost 36 per cent of women would end the relationship, compared to 26 per cent of blokes.
However, one in ten men would not tell their companion if they had a big win.
"Money is such a divisive issue for couples. Many fantasise about becoming rich and running away from commitments," The Sun quoted a spokeswoman for counsellors Relate, as saying.