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How to handle security deposits in vehicle rental
What a deposit is for, why it should never touch revenue, and how to release one without an argument.
For an operator whose deposits live in the same place as their takings.
What is a security deposit for?
It covers damage, loss, fuel and fines discovered after the hire, and it gives the hirer a reason to bring the vehicle back as agreed.
It is not a payment and it is not yours. Treating it as either is what turns a routine release into a dispute.
Why must deposits be kept apart from revenue?
Because they are money you expect to give back. A month that looks profitable on held deposits is a month about to look considerably worse.
Record it as a refundable charge on the booking, separate from the hire line, so revenue reporting and the balance owed answer different questions correctly.
How much should a deposit be?
Enough to cover the excess under your damage waiver, which is the amount you would actually be out of pocket for.
Anything much above that is a barrier to booking rather than protection. Anything below it means you carry the difference on every claim.
When should a deposit be released?
As soon as the vehicle is checked in and nothing is outstanding, ideally the same day, and always with the hirer told it has happened.
Most complaints about deposits are about silence rather than money. A release recorded on the ledger and an email saying so removes almost all of them.
Last updated 2026-09-06.
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