Rental security deposit: how to split what is kept

One friend books the house, so one friend’s card carries the security deposit. Until the host keeps part of it, that money is not a trip expense. If the host does keep some, the group has to decide whose cost it is: everyone’s, because the whole group left the place messy, or one person’s, because one person broke something.

A deposit is an advance, not a cost

A security deposit is money held in case of damage. It can be a payment that leaves the account and comes back later, or a hold that reduces the available limit on a card without being charged. Either way, adding it to the shared expenses would make the trip look more expensive than it is, and the person who booked would be asking friends for money that should come back.

Keep two lines apart. The rent is a shared expense from the start. The deposit is an advance by the booker, to be watched until it is released or partly kept. If the friends chip in for the deposit before the trip, record those contributions as advances too, so each person gets the right amount back when it returns.

A rental car works the same way. The difference between a card hold and a real charge is covered in our guide to US road trip costs.

Ask for the written reason before splitting anything

On Airbnb, most hosts may not charge a security deposit or a card hold for incidentals. The platform’s pricing policy, consulted on November 9, 2026, allows exceptions: some software-connected hosts may collect a deposit off the platform if it is disclosed before booking, and hotels may place a hold at check-in. When there is no damage and no incidental charge, the deposit must be refunded or the hold released in full within 7 days of checkout, or 14 days for hotels.

The same policy says a host who keeps part of a deposit should be ready to give a written explanation and evidence. That is useful for the group too. A clear reason, such as an extra cleaning fee or a broken item, tells everyone what the retained amount covers. Without it, the group is splitting a number nobody can explain. Other platforms and rental agencies have their own terms, so read the ones in your booking.

www.airbnb.com/help/article/140

Shared cleaning or one broken lamp

In this fictional example, Sam books a cabin for four: Sam, Priya, Leo and Nina. The rent is $1,200, split equally at $300 each. The host collects a $400 security deposit, disclosed before booking. Sam pays both, so Sam is out $1,600 before the trip starts.

First case: the host keeps $100 for extra cleaning and returns $300. The group agrees the mess was collective. The retained $100 becomes a shared expense of $25 each. Priya, Leo and Nina each owe Sam $325. Check Sam’s side: $1,600 paid, $300 back, $975 received from friends. Sam’s own cost is $325, the same as everyone else.

Second case: the host keeps the same $100 because Leo knocked over a lamp, and the group agrees Leo should cover it. The retained amount is assigned to Leo alone. Leo owes $400, Priya and Nina owe $300 each. Sam has paid $1,600, received $300 back and $1,000 from friends, so Sam’s cost is $300. The totals still add up: $300 + $400 + $300 + $300 = $1,300, the rent plus the amount kept.

Who should pay for damage is the group’s decision, not a rule of arithmetic. Some groups share every accident; others prefer that the person responsible pays. Agreeing on the principle before the trip avoids having that conversation over a photo of a broken lamp.

When the request arrives after the trip

Without a deposit, a damage cost can still show up later. Airbnb’s guest help page, consulted on November 9, 2026, explains that a host can send a reimbursement request through the Resolution Center for damage, missing items or unexpected cleaning costs. The guest has 24 hours to respond. If the guest pays only part, declines or does not respond, the host may involve Airbnb or its insurer, and after notice and a chance to appeal, the guest’s payment method can be charged.

That request reaches the person who booked, sometimes after the group has already settled up. Keep the trip open until the deposit is returned or the usual checkout window has passed. If a charge arrives later, add it as a new expense with its reason and the people concerned, rather than quietly absorbing it. This describes how the platform says it handles requests; it is not legal advice on who is liable.

www.airbnb.com/help/article/1415

Keep the deposit visible until it is closed

In Spliz, a group can record the rent, add a retained amount as a separate expense and choose who shares it. Each person’s balance then shows what is left to pay. 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 deposit line only when the booker confirms what actually came back.

Spliz

Sources

• Airbnb, Pricing and payment transparency, security deposits, holds and the 7 day refund rule (consulted November 9, 2026).
• Airbnb, Getting charged for damage, reimbursement requests and the guest’s response window (consulted November 9, 2026).