If you're someone who has a bad flatmate - and we've all had one, haven't we? - then you could end up £552 out of pocket each year as a result of their refusal to pay their way.
It should be pointed out, if you've not had a bad flatmate that is guilty of at least a few of the traits outlined in this article, it's probably you.
Anyway, this news comes from a piece of research performed by Barclays bank, who found that the cost of roommates failing to pull their weight is worth about £434 million each year in the UK.
In fact, more than half of house sharers in Britain (54 percent, to be precise) say that they're worse off as a result.
The other 46 percent are presumably living it up by being lazy and not paying their full share, right?
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However, it's a smaller - but not insignificant - number that say that they've actually taken the fight to their flatmates never chipping in for the essentials such as toilet paper, tea bags, or milk.
31 percent claim they've piped up about it, and 27 percent say they've lost their rag with flatmates when they fail to keep up with the bills on time.
Zainab Kwaw-Swanzy, from Barclays, said: "Living with others can be tough - something that lockdown certainly heightened for many people across the UK."
Their piece of research also found that people won't actually take anyone to task about these things until they are £46 out of pocket.
As well as that, it can take around half of the people surveyed up to a month before things are actually mentioned.
When things do come to a head, 51 percent of folks prefer to tackle the issue face-to-face, but 44 percent feel it's easier - if less personal - to send a message via WhatsApp or a text.
Of course, 19 percent of people feel that the best way to express their concerns is with a sticky note somewhere around the house.
That'll teach 'em, right?
Money isn't the only issue in the shared house, though.
35 percent reported that housemates not clearing up after themselves as a big concern, and 35 percent said stealing food without asking was their biggest peeve.
There's all sorts of other concerns such as inviting friends over without asking, hogging the telly, and - of course - poor bathroom habits, that all rank fairly highly on the list of niggles.
So, what can you do to assuage the rage?
Relationship expert Jo Barnett explained: "Maintaining positive relationships is a huge part of our overall happiness - especially with those you see day in, day out, such as your flatmates,
"My simple tips for how to live in household harmony will help keep rows with your roomies at bay."
She suggests setting house rules, having a separate house kitty, discussing issues face-to-face, and simply trying to be nice to each other.
She also suggested setting up a house tournament to reward people who do good things for the house, but - honestly - who is going to want to do that?
Just don't be a slob and pull your weight, folks.
Featured Image Credit: NBC