Booking.com is holding $10.1 billion of traveller cash. Almost none of it is a late payment.

Booking Holdings reported $10.1 billion in deferred merchant bookings on its 30 June 2026 balance sheet, against $5.3 billion six months earlier. Expedia Group reported $15.4 billion on the same date. Neither figure is money owed late. It is money collected from travellers for stays that have not happened yet.

This piece is for independent hoteliers and small-group operators who already know the merchant model moved their payout to after checkout, and who want to understand what actually drives the size of the balance. Where the numbers come from company filings, they are cited to the filing.

Deferred merchant bookings is not the payout lag, and Expedia's balance sheet proves it

Expedia Group reports two separate lines. Deferred merchant bookings, which stood at $15.4 billion on 30 June 2026, holds cash taken from travellers for stays still in the future. Accounts payable, merchant, which stood at $2.5 billion on the same date, holds what is owed to suppliers for stays that have already happened.

The second line is the payout lag. It is roughly one sixth the size of the first.

Booking Holdings does not break the two out, but its filing describes deferred merchant bookings the same way: cash payments received from travellers in advance of the company completing its performance obligations, mostly still refundable on cancellation. The definition is about timing of stay, not timing of payment.

Coverage of the merchant shift, including our own earlier reporting on Booking.com's move to merchant payments, has tended to treat the headline balance as the sum of delayed payouts. It is not. Fixing the payout window would barely move it.

The balance nearly doubled in six months because summer stays get booked in winter

Booking Holdings' deferred merchant bookings ran $5.3 billion (31 December 2025), $8.2 billion (31 March 2026) and $10.1 billion (30 June 2026). That is a 92% rise across two quarters, in a period when the payout schedule did not change.

What changed was the calendar. Travellers book summer in winter and spring, pay at booking, and stay months later. The float is the area between those two dates multiplied by the volume flowing through it.

Expedia states the seasonality plainly in its own filing: revenue for merchant and agency hotel is recognised as travel takes place rather than when it is booked, so revenue lags bookings by several weeks for hotels and by several months or more for its alternative-accommodations business.

Read that back as an operator. Every lever that pulls bookings further forward (advance-purchase discounts, non-refundable rates, early-bird campaigns, longer booking windows on group business) lengthens the gap between the guest paying and the hotel being paid. Hotels have spent years pushing exactly those levers, for good revenue-management reasons. On merchant inventory, they also build the float.

Expedia named the mechanism as a source of working capital in 2007

This is not an emerging story. In its 10-Q for the quarter ended 30 June 2007, Expedia set out the merchant model and its purpose: it receives cash from travellers at booking, pays hotel suppliers after the traveller has stayed and the supplier has billed, and describes the resulting operating cycle as a working capital source of cash to the company. The filing goes further, noting that as long as the merchant hotel business keeps growing, changes in working capital should keep helping operating cash flow.

Nineteen years later, Booking.com has converted most of its own volume to the same structure. Merchant revenues reached $5.1 billion of Booking Holdings' $7.4 billion in total revenues for the second quarter of 2026, with agency revenues falling to $1.9 billion from $2.0 billion a year earlier.

BOOKING HOLDINGS, QUARTER ENDED 30 JUNE 2026

├── Deferred merchant bookings: $10.1bn (vs $5.3bn at 31 Dec 2025)

├── Merchant revenues: $5.1bn

├── Agency revenues: $1.9bn (down from $2.0bn)

└── Interest and dividend income: $201m (down from $234m)

EXPEDIA GROUP, SAME DATE

├── Deferred merchant bookings: $15.4bn

└── Accounts payable, merchant: $2.5bn

Source: company Form 10-Q filings, SEC

The float is worth less to the platforms than it was, which cuts both ways

Booking Holdings recorded $201 million in interest and dividend income in the second quarter of 2026, down from $234 million in the same quarter of 2025, while the float itself grew. Falling rates reduced what the cash earns.

That is the honest counter-argument to reading the balance as pure extraction. Some of it is not extraction at all: it is refundable, and a portion of every balance is cancelled back to travellers rather than ever reaching a hotel. Booking's filing says the amounts are mostly subject to refunds for cancellations. The platforms also carry the chargeback exposure, the currency conversion and the refund handling that the hotel would otherwise absorb.

What the filings cannot settle is the question operators most want answered: what the float costs an individual property. Neither company discloses payout timing by property size or region, and no public dataset covers hotel working-capital cycles at this level. Any per-property figure circulating in the trade press is modelled, not reported.

Regulators are acting on commission and parity, not on who holds the cash

The pressure being applied to Booking.com runs almost entirely through price and ranking. Booking Holdings' filing discloses a 2025 Swiss Price Surveillance Office decision ordering a reduction in its average commission level for hotels in Switzerland, under appeal and suspended pending outcome, with any ordered reduction running for three years after a final negative judgment. Spain's competition authority fined Booking.com in 2024 and restricted its parity provisions and ranking criteria, with $472 million carried as a liability at 30 June 2026 and the decision suspended on appeal. German hotels have parity claims in progress, Dutch foundations have filed on behalf of European hotels, and competition authorities in Greece and Hungary opened investigations in 2025.

Not one of those actions concerns when the hotel gets paid, or who earns on the cash in between. The shift in where the distribution fight is actually happening has left this corner of it untouched.

Some operators are responding on the one variable they hold directly, which is channel mix by rate type: keeping deep advance-purchase inventory on direct channels, where payment at booking lands in the hotel's own account, and steering shorter-lead-time inventory to merchant channels where the gap is smallest. Others take the opposite view, that advance-purchase distribution through the platforms is what fills the shoulder season and the float is the price of it. The filings do not adjudicate between them.

Airbnb, on its own published terms, releases most home-stay payouts by the end of the business day after the guest's scheduled check-in, a gap we covered when its split-payment change landed. Booking.com pays after checkout. Same held cash, one night of stay apart, and no regulator anywhere has asked either of them why.