A dorm bed in central London still costs less than a pub dinner. My short answer: Wombat's in Aldgate for a big social hostel done properly (£20.29, every dorm with its own bathroom), Onefam Notting Hill if you're 18 to 36 and want a free dinner and a crowd to go out with (£15.30), and YHA London Central if you're travelling with children. Those prices are for Tuesday 10 November 2026. This page is about dorm beds and choosing a hostel; if you want a room of your own for two, cheap hotels in London compares hostel private rooms with budget hotels, and where to stay in London helps you pick an area first.
The hostels are grouped by what you want from the night: central and social; quiet and 18+; all ages and families; and cheapest by a mile. Most cards give the cheapest dorm bed and the cheapest private room for two on that Tuesday, from the hostel's own site unless it says Booking.com, checked 23 to 27 September 2026; where a hostel had no private room that night, or only publishes from-prices, the card says so. VAT is included, and there's no London tourist tax yet. The cards also give the walk to the nearest subway (the Tube) station, and the rules that decide whether you can book at all: many London hostels cap dorm guests at 36, 39, 40 or 45, most cap stays at 7 to 14 nights, and a few take no under-18s at all.
Hostel prices move with demand far more than hotel rates do, so treat every figure as a Tuesday in November, not a quote. Summer, weekends and the run-up to Christmas cost more. Pack a padlock, since most lockers need one, and a small towel, since most hostels here rent them. Several hostels sell cheaper rates or throw in breakfast when you book on their own site.