It's 11pm on a Tuesday. Mika is folding laundry. Her partner Ren is on the couch scrolling. She's done dishes 4 nights in a row. He paid the electric bill last week and thinks they're even. Neither of them is actually keeping score — but both of them feel like they're losing. This is how most cohabiting couples fight. Not about the big stuff. About the invisible ledger that nobody agreed to but everyone is tracking in their head. I've been living with my partner for 6 years. For the first 2, we had the same fight on rotation: "I feel like I'm doing more." The cost of not fixing it was brutal — we spent maybe 3 hours a week arguing about money and chores. That's ~150 hours a year of relationship damage over something a spreadsheet could solve. One couple I know actually split a $4,200 vacation 50/50 even though one earned 3x the other, then spent the whole trip resenting each other. This article is the system I built in Notion to make it stop. I'll show you the exact databases, formulas, and weekly ritual.…