Booking.com lists hotels, apartments and other accommodation worldwide. Its discount structure is different from retail: the meaningful reductions come from the Genius loyalty tiers and from property-set member rates, both of which apply automatically once you are signed in.

Promotional codes exist but are usually narrow — limited to a region, a date window, or a minimum stay — and they generally cannot be combined with a Genius rate. Sign in first, read the price, then test the code and keep the lower number.

The rate type matters more than the discount. A non-refundable rate is typically 10–15% below the flexible rate for the same room, which is often larger than any code on offer; whether that is a saving depends entirely on how firm your dates are. Read the cancellation policy before optimising the price.

1. Sign in before searching — Genius and member rates only show on a signed-in session.
2. Click Get code and run your search in the Booking tab.
3. Enter the code at the payment step and compare the total against the signed-in price.
4. Check the cancellation policy on the discounted rate before confirming.