27-year-old shares grocery costs with roommate, protests when she tries to split the bill for her boyfriend's birthday cake: 'It's added up to real money'

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Ally Perry • Writer and Editor
Aug 3, 2026 12:30 PM EDT

Should people who live together also split all of their living costs?

The forced intimacy that can come from having roommates is not a life experience for the weak. Coping with all the quirks and home habits of somebody who could very well have been a stranger when you moved in together is a process of constant adjustment, as well as a lesson in making compromises and sending passive-aggressive messages about house rules and maintenance. Some people are a dream to live with, but they are in the minority.

One of the difficulties that happens when you live with other people is the question of sharing. Who gets to use the bathroom first on a workday, and should you take turns buying dish soap and paper towels, or simply each have your own? Although these issues seem relatively small on the face of it, they can easily grow into a major argument if they are not handled correctly. It doesn't help that some roommates are so disinterested in being cooperative that even the most reasonable individual might end up losing their temper at them. It is the natural consequence of facing longstanding tensions in the very place where you should be able to relax.

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  • A model representing a young woman smiling as she looks at her phone while holding a basket in the aisle of a grocery store
    via Getty Images (Unsplash+)

    A model representing a young woman smiling as she looks at her phone while holding a basket in the aisle of a grocery store

  • A woman was growing tired of the arrangement she had with her roommate, where they split all their grocery costs and took turns doing the weekly grocery shopping. She felt like she always shopped fairly when it was her turn, but her roommate always made frivolous purchases on things they didn't agree on and still expected her to pay half.

    The final straw came when this roommate decided to buy ingredients for her boyfriend's birthday cake using the shared grocery money, leading the woman to tell her that going forward, she would only be paying for the items they already agreed on. She faced accusations of being petty, and she wanted a second opinion.

  • Am I wrong for telling my roommate she can't keep charging me for "her turn" to buy groceries when she buys completely different food than what we agreed on?

    My roommate (26F, I'm 27F) and I split grocery costs, we take turns doing the big shop every other week and Venmo request each other for half. Sounds simple, except when it's her turn, she consistently buys stuff neither of us discussed, specialty snacks, a $9 candle
    via whitelightnow
  • "because I was already there," skincare from the grocery store, and then requests me for half of the total receipt. I brought this up gently the first time it happened, she said she'd "be more mindful." Second time, half the receipt
    via whitelightnow
  • was baking supplies for a cake she was making for her boyfriend's birthday, unrelated to our actual meals. I paid it both times because I didn't want to nickel and dime over what felt like small amounts, but three months in it's
    via whitelightnow
  • added up to real money, and I'm the one always double checking receipts now like some kind of accountant instead of just trusting the system we agreed on.
    via whitelightnow
  • Told her going forward I'll only Venmo for items that are actual shared groceries, and she can keep the rest off my half. She said I'm being cheap and "ruining the whole point of splitting things evenly," and that tracking it item by item is petty compared to how she never complained when I bought name brand stuff during my turns.
    via whitelightnow
  • AIO for wanting to actually stick to what we agreed to buy, or is itemizing groceries between roommates genuinely as uptight as she's making it sound?
    via whitelightnow
  • A representation of a woman holding a basket and browsing the chilled aisle in a grocery store
    via Getty Images (Unsplash+)

    A representation of a woman holding a basket and browsing the chilled aisle in a grocery store

  • Exotic_Yam_1703 You both should just start buying your own groceries. NOR
    via Exotic_Yam_1703
  • Opposite everyday No, she's taking advantage of you and was hoping you wouldn't notice.
    via Opposite_everyday
  • Do you write a list of the shared items before shopping? If so, it's not difficult to do two transactions when checking out. She can just separate the shared items from her specific items and pay separately to have two receipts. Or just alternate buying the same shared items and don't pay each other back. I bet in that case she will stop purchasing all of those extras
    via Opposite_everyday
  • arrrtstarrr NOR. At this point, just opt to buy your own groceries. She's not going to stop.
    via arrrtstarrr
  • AlexNKarlie Next time you shop add a bunch of personal items and bill her for half and see what she says. She knows what she's doing. My roommates and I would each contribute a certain amount and one person would take the money and shop. Receipt and change if any left on the counter. NOR
    via AlexNKarlie
  • Yvmeno NOR. Don't pay for stuff that isn't for you.
    via Yvmeno
  • Pedal2Medal2 NOR. Buy your own groceries, split the cost for household items, but specific ones.
    via Pedal2Medal2
  • SadFlatworm1436 Next time it's your turn to buy the groceries, do a big personal shop, stock up on deodorants, skin care, sun protection cream, office supplies etc etc and ask her for her half ...see how she reacts
    via SadFlatworm1436
  • juliewbb NOR. Honestly time to shop separately. It'll underscore that she crossed the boundary and save you money.
    via juliewbb

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