Priced on the same basis

Any hotel site can claim it is cheaper. We wanted a number a sceptic could check, so we built the largest comparison we have ever run: 47,298 room-nights, 146 cities, priced on both sides in the same three days — our member prices against a signed-in Booking.com Genius account.

What "the same basis" means

A hotel price is a stack: the room, the VAT, the city tax, the odd resort fee. Different websites slice the stack differently, and most price comparisons quietly compare different slices. The rule for this study is: both sides all-in. Our price is what you pay us plus every charge the hotel collects at the desk. Booking's price is their own total including taxes and charges, exactly as a signed-in guest sees it.

We took this to lengths that surprised even us. To pin down what European hotels actually collect at reception, we booked rooms, stayed in them, and asked for the invoices. The invoices, EU consumer law and Booking's own price breakdowns all agree — down to the cent of Barcelona city tax per person per night — and our displayed prices are built on that verified basis. When you see a total on Sleepfare, it is the total.

The method

Between 19 and 21 August we priced both sides live:

• Booking's side: their own search results, signed into a Genius account, one-night stays, two adults, in euros, at lead times from one week to three months out.
• Our side: our live booking engine, same nights, same party, at member pricing — a flat 10% below our public price on every room.
• Matching: hotels were paired by map coordinates first and names second, because names lie. "The same hotel" here means the same building on the map, and wherever we could not be certain, we discarded the pair.

And one rule that matters more than any of the above: the hotels in our catalogue were selected using only the short lead times, and every number below is measured only on the long lead times the selection never saw. A comparison that grades itself on the dates it was tuned for will always look good; this one had to perform on dates it had never seen.

The result

Across the catalogue, on those held-out dates:

Room-nights measured	13,431
Member price below Booking Genius	97%
Median saving	10%

The saving is not uniform: per city, the median runs from −18.7% to −4.1%. The full table — 95 cities, with hotel counts and sample sizes — is in the published dataset, so you can look up the cities you actually travel to.

Membership, for the avoidance of doubt, is free: one email address, no password, no card.

Caveats

One-night stays, two adults, euros, cheapest bookable room on each side — not always the identical room type. A Genius Level 1 account. Prices observed 19–21 August 2026, and they move constantly: treat the shape as the finding, not any single number. Where a hotel charges an at-property fee that no source will put a number on, both sides exclude it and our checkout says so rather than guessing.

The dataset behind this article is published at /journal-data/august-study-cities.csv. If you find a hotel where the numbers are not what this article says, tell us — the study reruns, and the catalogue moves with it.