Moving in together feels like a money win at first. You split rent, share streaming services, and suddenly you’re buying one set of paper towels instead of two. Then the first full month hits and one category climbs in a way most couples don’t expect. It isn’t always rent, and it isn’t always utilities. For a lot of households, the bill that spikes is groceries, because two routines collide in one kitchen. Once you understand why it happens, you can fix it without turning every dinner into a debate.
