Paying for London's Tube and buses comes down to a straightforward choice: buy an Oyster card, or simply tap the contactless bank card or phone you already have. For most visitors, contactless is now the better default — the fares and daily caps are identical to Oyster, and you skip the queue and the deposit. There are still a few situations where an Oyster card makes more sense, and it's worth knowing them before you land.
The short answer: they cost the same
Transport for London (TfL) deliberately prices Oyster and contactless identically for pay-as-you-go travel, including the same daily and weekly fare caps. There is no fare advantage to either one — the decision is really about convenience, foreign transaction fees, and a couple of edge cases covered below.
Contactless: the easiest option for most visitors
If your bank card supports contactless payment (nearly all UK, European, US, Australian and most other modern cards do), you can simply tap it directly on the yellow readers at Tube gates and on buses. There's nothing to buy, register or top up — TfL calculates your fare and any applicable cap automatically at the end of each day, and charges your card once for everything you've tapped, usually the following day.
Phone and watch wallets (Apple Pay, Google Pay and similar) work exactly the same way as a physical contactless card, tapping on the same readers.
Oyster card: when it's worth buying one
An Oyster card is a rechargeable travel card you buy (with a small refundable deposit) from Tube station machines, ticket offices, or many convenience stores across the city, then top up with cash or card. It's worth considering if:
- Your bank card charges high foreign transaction fees and you'll be making many trips over several days.
- You want to keep travel spending visibly separate from your main bank account — useful for budgeting on a longer trip.
- You're travelling with children — Oyster supports child-rate and Zip cards for young people, which contactless bank cards cannot replicate, since contactless always charges the adult fare.
- You don't have a contactless-enabled card at all, which is increasingly rare but still worth checking before you travel.
A Visitor Oyster card, bought online before you arrive or at the airport, works exactly like a standard Oyster card but is aimed specifically at tourists and sometimes bundled with small discounts at attractions. It offers no fare advantage over a standard Oyster card bought on arrival — the appeal is purely having it ready before you land.
How capping works
Both Oyster and contactless cap your spending automatically within a single day and across a rolling week (Monday to Sunday for contactless and standard Oyster pay-as-you-go), based on the zones you travel through. Once you hit the cap, further journeys that day or week are free — there's no need to buy a Travelcard or select anything in advance; the system tracks your taps and applies the lowest possible total automatically.
The one important rule: the cap only works per card. If you tap in with one bank card and, say, switch to your phone wallet later in the trip, TfL treats them as two separate customers and you'll be charged from scratch on each, potentially missing out on a cap you would otherwise have hit. Pick one card or device for your entire visit and stick to it.
What the cards cover
Both Oyster and contactless work across the Underground, London Overground, the Elizabeth line, most National Rail services within London's zones, buses, trams and the DLR. Buses are contactless/Oyster-only in London — you cannot pay a bus driver with cash — so having one or the other set up before boarding a bus is essential, not optional.
Getting from the airport
Contactless and Oyster both work on the Underground, Elizabeth line and most rail routes from London's airports into the centre, though some premium airport express services (like the Heathrow Express) are ticketed separately and aren't covered by standard pay-as-you-go capping. See our London airports to the city guide for how Heathrow, Gatwick, Stansted and Luton each connect, and which of those routes accept a simple Oyster/contactless tap versus needing a separate ticket. Once you're on the network, our London Underground guide covers lines, interchanges and general Tube etiquette in more depth.
How London compares to other tap-and-go cities
London effectively pioneered the contactless-first model that cities like New York and Sydney have since adopted — see our guides to New York's OMNY and Sydney's Opal card for how closely each system now mirrors the other. The underlying habit is the same everywhere: tap in and out with a single card or device for your whole trip and let the system apply the cap automatically, rather than trying to plan the cheapest combination of tickets yourself.
Frequently asked questions
Is Oyster cheaper than contactless in London?
No — TfL prices them identically, including the same daily and weekly caps. The only cost difference comes from your own bank's potential foreign transaction fees on contactless, which don't apply to a topped-up Oyster card.
Can I use contactless on London buses?
Yes, and in fact London buses only accept Oyster or contactless — you cannot pay with cash on board. Tap your card or phone on the reader as you board.
Do I need to tap out as well as in?
On the Underground, Elizabeth line and most rail services, yes — tap in and tap out at both ends of your journey, or you'll be charged a higher default fare. On buses, you only tap once when boarding, since London bus fares are a flat rate regardless of distance.
What happens to unused balance on an Oyster card when I leave?
You can get any remaining pay-as-you-go balance and the card deposit refunded at a Tube station ticket machine before you leave, or keep the card for a future visit, since Oyster cards don't expire from disuse.
Sources and further reading:
- Transport for London (TfL) official Oyster and contactless fares pages.
- TfL Visitor Oyster card information.