Renting a boat with friends: splitting the costs

A day on a boat rarely comes as one amount. There is the rental booked in advance, sometimes a skipper, a deposit held on one card and the fuel counted when you get back to the dock. To split it fairly, separate what was fixed at booking from what depends on the outing, and keep the deposit apart.

Three kinds of costs, three rules

The rental and the skipper are fixed costs: their price does not change with the number of people aboard. Fuel is a variable cost, known only on return, when the rental company refills the tank or measures what was used. The deposit is not an expense: it is a guarantee, often a hold on the booker’s card, released if the boat comes back undamaged.

Before booking, read the contract to see what is included: fuel, skipper, cleaning, equipment. Also note the deposit amount and which card carries it. Keeping these three lines apart stops the group from asking friends for money that should come back to the person who booked.

The deposit stays an advance

As long as the rental company keeps nothing, the deposit is not part of the day’s costs. If some of it is kept, for a scratched hull or lost equipment, add that amount as a new expense with its reason, and decide together who shares it. Our guide to a shared rental security deposit walks through this case with numbers.

A worked example with a cancellation

In this fictional example, Sofia books a boat for six people: Sofia, Malik, Chloe, Theo, Nina and Yanis. She pays $540 for the rental and $180 for the skipper, so $720. A $1,000 deposit is held on her card. On return, the rental company charges $84 for fuel, which Malik pays on the spot.

Yanis cancels the day before, too late to change the booking. The group agrees he pays his share of the fixed costs, booked for him, but not the fuel for an outing he did not join. This agreement is an assumption of the example, not a rule: each group sets its own, ideally before booking.

The fixed costs come to $720 for six, so $120 each. Fuel comes to $84 for the five who went, so $16.80 each. Yanis owes $120, and each of the other five owes $136.80. Check: 5 × $136.80 + $120 = $804, which is $720 + $84.

To settle up, Chloe, Theo and Nina each send Sofia $136.80, Yanis sends her $120 and Malik $52.80, which is his $136.80 share minus the $84 of fuel he already paid. Sofia receives $583.20: she had advanced $720, so her own share of $136.80 is what remains. Once the deposit is released, she owes nobody anything.

If the group had decided Yanis pays nothing, the $720 would be split five ways: each person aboard would pay $24 more, so $160.80. Both choices are defensible. What matters is saying so before someone drops out. For other cases where not everyone takes part, see how to split an activity not everyone joins.

Fuel is shared by the people aboard

Fuel comes last, often paid by whoever is closest to the counter. Record it right away, with the name of the person who paid, before the group scatters. A photo of the receipt at the dock beats an amount rebuilt from memory that evening.

Record the expenses, settle separately

In Spliz, the group can record the rental and skipper split six ways, the fuel split among the five who went, and see each person’s balance. Spliz does not move money: repayments happen by bank transfer, in cash or with another app, and can be noted in the group afterwards. Close the outing only once the deposit is released or any amount kept has been added.

Spliz