Guides
Splitting money is half arithmetic and half etiquette. These cover both.
How to split rent with roommates
Four methods, when unequal rooms justify unequal rent, and how to handle bills that arrive quarterly.
How to split expenses on a group trip
Set the rules before you fly, handle the currency problem, and avoid the two failure modes.
How to settle up without it being awkward
Why "simplified" debts cause arguments, and the scripts for asking someone to pay you back.