Shared Living & Splitting Up Costs
Who owes whom, how to split a rent that is not equal, and what the subscriptions really add up to.
Squaring up after a group trip is not everyone paying everyone. Net each person to a single balance, match debtors to creditors, and four people need at most three payments — with the odd penny accounted for.
An equal split ignores the fact that one of you is in a box room. Here is how to divide rent by floor area, by area adjusted for features, or by weights you agree — with every method reconciling to the exact rent.
Some of your costs move with the headcount and some do not. Work out the marginal cost of one guest and your budget stops surprising you — with a worked example at two guest counts.
A monthly price is the wrong unit for a decision. Convert every subscription to an annual figure on the same scale and the small ones stop hiding — with a fully worked hypothetical list.
Per-head planning arithmetic for a party shopping list — mains, sides, snacks, drinks, ice and tableware. Every rate here is a starting estimate you adjust, not a rule.