Trip Cost Splitter

Guide: how to split a group trip fairly

What it does

After a group trip, the money is always a mess: one person fronted the rental, someone else covered gas and most of the dinners, and a third paid for the tickets. This tool untangles it. You list everyone and what each person actually paid toward the shared costs, and it computes each person's equal fair share, who overpaid (is owed money), who underpaid (owes money), and — the useful part — the shortest list of payments to settle everything. No app, no signup; everything is private in your browser.

How to use it

1. Add a row for each traveler (use the + button) and type their name.
2. In each row, enter the total that person paid out of pocket toward shared trip costs.
3. Read the per-person fair share at the top and the balances (who's up, who's down).
4. Follow the green "settle up" lines — that's the exact, minimal set of who-pays-whom.

Worked example

Three friends — Ana, Ben, Cara — on a weekend trip. Ana paid $600 (the rental), Ben paid $150 (gas), Cara paid $0:

1. Shared total = 600 + 150 + 0 = $750.
2. Fair share each = 750 / 3 = $250.
3. Balances: Ana 600 − 250 = +$350 (owed), Ben 150 − 250 = −$100 (owes), Cara 0 − 250 = −$250 (owes).
4. Settle up: Cara pays Ana $250, Ben pays Ana $100. Two payments, everyone even.

Notice it never asks Ben and Cara to pay each other — the matching always sends money straight to whoever is owed, so the group makes the fewest transfers possible.

The method

total       = sum of every person's "paid"
share       = total / numberOfPeople
balance[i]  = paid[i] - share          (+ = owed, - = owes)
settle:
  repeat: match biggest ower to biggest creditor,
          transfer min(|owes|, owed), reduce both,
  until all balances are ~0  ->  at most N-1 payments

Equal split: the shared pot is divided evenly among everyone listed. Balances always sum to zero, so the settlement is always exactly solvable.

Accuracy & tips

• The math is exact — balances always sum to $0, so the settlement closes perfectly. Cents are rounded only in the display.
• Only put shared costs in. A souvenir one person bought for themselves isn't a group cost — leave it out.
• One person can be the "banker." If everyone Venmos the same person, the settlement still shows the right amounts.
• To exclude someone from an expense, keep that cost out of the shared pot and handle it on the side.
• Fully client-side — nothing leaves your browser.

Common mistakes this tool prevents

• Trying to settle in your head and over- or under-paying someone.
• Having everyone pay everyone instead of the minimal direct transfers.
• Forgetting that the person who fronted the rental should be paid back, not paid again.
• Mixing personal spending into the shared pot.

How to embed this tool on your website

No account, no coding. Copy the embed code and paste it where you want it to appear:

<iframe src="https://snaptoolsuite.com/trip-cost-splitter/?embed=1"
  style="width:100%;max-width:560px;height:1100px;border:0;"
  title="Trip Cost Splitter" loading="lazy"></iframe>
<p>Free <a href="https://snaptoolsuite.com/trip-cost-splitter/">Trip Cost Splitter</a> by Snap Tool Suite</p>

See it live: view a real embed example →

Frequently asked questions

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