The setup
Six friends (Alex, Blake, Casey, Devon, Eli, Fatima) take a Thursday-to-Sunday trip to a lake house. Two cars drive from different cities. Everyone stays the same three nights. All six agreed the tab covers lodging, gas, groceries, and paid activities; individual coffees and non-group meals are on their own.
The running tab
- Airbnb (3 nights, 4-bedroom): $960 — paid by Alex
- Gas car 1 (round trip): $110 — paid by Blake (car owner)
- Gas car 2 (round trip): $95 — paid by Devon (car owner)
- Costco run: $220 — paid by Fatima
- Friday firewood + snacks: $48 — paid by Casey
- Saturday boat rental (all six went): $360 — paid by Alex
- Saturday dinner out (evenly split at the table, off the tab): —
- Sunday morning coffee run + bagels: $54 — paid by Eli
Group total on the tab: $960 + $110 + $95 + $220 + $48 + $360 + $54 = $1,847.
Per-person share
$1,847 ÷ 6 = $307.83 each.
Who paid what
- Alex paid: $960 + $360 = $1,320 (net position: is owed $1,012.17)
- Blake paid: $110 (net position: owes $197.83)
- Casey paid: $48 (net position: owes $259.83)
- Devon paid: $95 (net position: owes $212.83)
- Eli paid: $54 (net position: owes $253.83)
- Fatima paid: $220 (net position: owes $87.83)
Check: total paid = $1,320 + $110 + $48 + $95 + $54 + $220 = $1,847. ✓
The settlement transfers
Everyone owes Alex, because Alex fronted more than double the per-person share. Five Venmo transactions to Alex settle the trip:
- Blake → Alex: $197.83
- Casey → Alex: $259.83
- Devon → Alex: $212.83
- Eli → Alex: $253.83
- Fatima → Alex: $87.83
Total transferred to Alex: $1,012.15. ✓ (2 cents rounding.)
Why this settled cleanly
- Everyone logged what they paid as they paid it — no memory reconstruction on the drive home.
- Saturday dinner was split at the table, so it stayed off the tab and didn't complicate the settlement.
- Nobody tried to sub-account for who ate more Costco groceries.
- Alex fronted the two biggest items on purpose — his card had the highest rewards multiplier, which is worth $20+ back in points.
Adjustments to consider
If the group wants to be more precise, two common tweaks:
- Gas. Car owners often exclude themselves from the gas split, since they're providing the car. If Blake and Devon didn't want to be reimbursed for their own gas, subtract their gas from the total pool ($1,847 − $110 − $95 = $1,642) and split that: $273.67 each. Then Blake and Devon still pay $273.67 minus what they already spent on non-gas items.
- Different-length stays. If someone arrived Friday instead of Thursday, prorate the Airbnb by nights (they pay 2/3 of the per-person Airbnb).
The easiest way to run a trip tab like this? BillSplitterApp as a shared trip page — one person adds each expense as it happens, and the settle-up page tells everyone their number.