Business card pre-authorisation holds: why available balance can fall before the final charge

Hotels, car-rental companies, fuel providers and other merchants can reserve part of a business card's available balance before the final amount is known. The hold is not necessarily a posted charge, but it can reduce available credit or spending capacity at exactly the time a travelling employee needs the card most.

A pre-authorisation reserves spending capacity without necessarily creating the final card charge

American Express UK defines a pending transaction as an approved purchase or card pre-authorisation that has not yet posted to the card-account balance. A pre-authorisation appears as pending until the merchant submits a final charge or the hold is released.

For the business, the important distinction is between pending and settled. A hotel can reserve £900 against the corporate card at check-in even though the final invoice will eventually be £720. Finance should not assume the pending £900 is the amount that will be charged.

The hold can reduce available credit or funds even though it is not a final expense

Card issuers and merchants use the hold to make sure enough spending capacity exists for the expected transaction. Avis UK explains that a pre-authorisation is a temporary hold against available card funds and not an actual charge, but it still reduces the amount available to spend while the hold remains active.

This can matter on a business card with a tight employee limit. If a traveller has a £2,000 card limit and a hotel places a £1,200 hold, only £800 of headroom may remain for meals, transport and other legitimate costs even before the hotel bill settles.

Hotels and car-rental companies often add a buffer for incidentals or damage

Pre-authorisation is common where the final amount is not known at the start. Pleo's July 2026 guidance says hotels can hold the expected stay plus an amount for room service, minibar or damage, while car-rental companies can add fuel or damage deposits.

Avis UK gives a concrete current example: for UK rentals it generally places a hold for the estimated rental cost, less any amount prepaid, plus £300. A company that budgets only for the advertised rental price can therefore find substantially more of the employee's card limit temporarily unavailable.

The merchant can complete or reverse the authorisation, but the visible release depends on the issuer

When the final bill is processed, the merchant captures the amount actually due and the remaining authorisation should be released. Release timing varies. American Express says ordinary approved purchases can remain pending for several working days, while travel-sector holds can have different merchant and issuer timelines.

Avis UK says its vehicle-rental hold is released after the rental is completed, but depending on the card issuer it can take up to 28 days before the available balance fully reflects the release. Pleo says hotel holds usually release within hours or days after checkout, while rental holds can sometimes remain for 7 to 30 days.

Set travel-card limits with expected holds in mind

Before an employee travels, check the hotel and rental deposit policies as well as the expected actual spend. A £1,500 trip can need £2,500 or more of temporary card capacity where several hotels or car rentals overlap. Increase the limit temporarily where policy allows rather than waiting for a legitimate card to decline abroad.

For multiple travellers, avoid concentrating every booking on one low-limit card if the provider supports named employee cards. Also keep an emergency payment route for a traveller whose card limit is temporarily consumed by legitimate holds. The objective is controlled headroom, not permanently high spending limits.

Do not post the pending authorisation as the final travel expense

Wait for the settled transaction and final invoice before completing the accounting entry. A pending hold can disappear, be replaced by a lower final charge or be split across several final transactions. Booking the hold immediately can create duplicate or overstated expenses when the actual charge later arrives.

If the hold remains unusually long after checkout or vehicle return, contact the merchant first to confirm it completed or reversed the transaction, then contact the card issuer if necessary. Keep the final invoice and card record together so finance can distinguish an unreleased hold from a real duplicate charge.