It is hard to gauge exactly how much of a factor arguing about money contributes to relationship breakdown, but along with sex, it is pretty high on the list. Lack of trust and communication are at the heart of both issues.
As a money mentor, I frequently meet couples that just don’t talk about money. I was catching up with a girlfriend over a coffee and happened to mention this to her and she was quite surprised. “Bill and I talk about money all the time.”
There was a few seconds silence (while taking a bite of her scone) then she said, “no you’re right, we don’t talk about money, we yell at each other about money.”
Why is this? Well sometimes the arguments are really about money, but money arguments can also mask other issues within the relationship. This is because we attach emotions and meanings to money that really has nothing to do with 1+1=2.
So if you are yelling at each other about money, listen very carefully for any underlying issues.