• Use Splitwise to track shared costs fairly — it automatically calculates who owes what.
• Set up a joint account (Monzo, Starling) for household bills. Everyone puts their share in each month.
• Decide upfront how you'll split costs: equally, by room size, by income? Have the conversation early.
• Make sure everyone's name is on the tenancy and bills — if only one person's name is on everything, they carry all the legal risk.