Guides
Guides to splitting bills and shared expenses
Practical advice for roommates, couples and travel groups, plus how-tos for the Cost Share app.
How to split rent fairly with roommates
Five methods, from equal to room-size and hybrid splits, with a worked example.
Bill split calculator with tip & tax
Work out what each person owes in seconds. Free, no sign-up.
How to add friends in Cost Share
Search by name, scan a QR code, or share your invite link.
How to create a group in Cost Share
Set up a group for a trip, your home or a couple in one step.
How to add people to a group in Cost Share
Step-by-step with pictures: get your friends into the right group.
How to add an expense and split it
Split equally, by exact amounts, by percentage or by shares.
How to scan a receipt and split it by item
AI reads the bill; you tap who had what. Tax and tip split fairly.
Splitting bills with roommates
Rent, utilities and groceries in a shared home, without the awkward texts.
Splitting travel expenses with friends
Multi-currency trips, settled up once you're home.
Sharing expenses as a couple
50/50 or by income: how couples split costs fairly.