There's no legal requirement to register a bicycle in the UK, but bike registration is one of the cheapest things you can do to improve your chances of getting a stolen bike back. It's free and quick to do. The catch is that it only helps once your bike has been found, which is worth understanding before you rely on it.
This guide covers whether you need to register, the two main free schemes, how to find your frame number and what registration can and can't do after a theft.
Do you have to register a bike in the UK?
For an ordinary pedal bike, no. You don't need a licence, registration or insurance to ride one.
E-bikes are where people get confused. Under GOV.UK's electric bike rules, an electrically assisted pedal cycle (EAPC) doesn't need to be registered, taxed or insured. To count as an EAPC, its motor must have a continuous rated power of no more than 250 watts and must stop assisting above 15.5mph. If an electric bike goes beyond those limits, it's classed as a motorcycle or moped. It then has to be registered and taxed, insured, and ridden with a driving licence and a motorcycle helmet.
So if you've searched for bike registration because you've bought a powerful e-bike, check its markings first. If it's a road-legal EAPC, the registration we're talking about here is voluntary, and it's about theft.
Why registering your bike is worth it
Police recover stolen bikes regularly. The problem is getting them back to their owners. Avon and Somerset Police puts it bluntly on its bike theft advice page: while a large number of stolen bikes are recovered each year, officers are often unable to return them or prosecute offenders because the owner can't be traced.
A bike with a registered frame number linked to your name solves that. If an officer stops someone with your bike, or it turns up in a raid or for sale, the frame number connects it to you. It also gives you proof of ownership if you spot your bike listed online, which matters when you're asking the police to act on it.
There's a deterrent side too. BikeRegister's visible marks and warning stickers are designed to tell a thief the bike is traceable, which makes it a less attractive thing to steal and sell on.
The main UK bike registration schemes
BikeRegister
BikeRegister is the scheme most cyclists will have heard of. It describes itself as the UK's national, police-preferred bicycle marking and registration scheme, and says every police force in the UK uses its database to search for stolen and recovered bikes. Registration is free, and it says more than 1,300,000 bikes have been registered.
You can add your bike's details and photos for free, then choose whether to buy a marking kit. At the time of writing, the Membership Plus kit with tamper-resistant QR labels costs £12.99, and the permanent marking kit, which etches a visible BikeRegister ID into the frame, costs £19.99. Some police forces also run free marking events, so it's worth checking with your local neighbourhood team before you buy a kit.
BikeRegister also lets you report a bike as stolen even if it wasn't registered beforehand, and runs a free BikeChecker so anyone buying second-hand can check whether a bike has been reported stolen.
Immobilise
Immobilise is a free national property register that covers bikes along with phones, laptops and other valuables. It says updates you make are immediately available to police nationally, and it's a police-approved Secured by Design initiative. You can also download ownership certificates to support an insurance claim or police report.
There's no rule against using both, and it costs nothing to do so. If we had to pick one for a bike, it would be BikeRegister, because it's built around bikes and the marking kits add a visible deterrent. Immobilise is a sensible second register, especially if you're already using it for other valuables.
How to find your frame number
Your frame number is usually stamped into the metal on the underside of the bottom bracket, the part of the frame where the pedal cranks attach. Turn the bike upside down and you'll normally see it there.
If it isn't there, the ETA's guide to finding your frame number suggests checking the inside of the chainstay, the down tube or the top tube. On carbon frames the number may be etched into the surface or shown on a sticker. The same guide warns that six-digit numbers starting with BS or EN are safety standard references, not frame numbers, so don't register those by mistake.
Some older bikes and carbon frames don't have a frame number at all. In that case a security marking kit gives the bike a unique ID that can be registered instead.
When you register, add as much as you can: make, model, colour, frame size, any upgrades or distinctive features, and several clear photos, including the frame number itself. Keep your receipt somewhere safe too. All of this helps the police, and it helps any insurance claim.
What registration can't do
Registration is only useful once your bike is in someone's hands who checks it. It won't tell you where your bike is. If it's stripped for parts, kept in a lock-up or moved out of the area, a frame number on a database does nothing to bring it back.
That's the honest limit, and it's why we'd treat registration as one layer rather than the whole plan. Our article on where stolen bikes actually go explains why so many stolen bikes never resurface where an officer would check them.
Registration plus tracking
A tracker fills the gap registration leaves. With BackPedal, you fit a covert GPS tracker to your bike, and if it's stolen our recovery team follows it and goes to get it back, with nationwide recovery across mainland UK. We've recovered more than 1,000 bikes, with a recovery rate of over 80%. Our explainer on covert bike trackers shows how hidden trackers work and why thieves rarely find them.
The two work well together. The tracker tells us where the bike is, and a registered frame number and photos make it straightforward to prove the bike is yours when we get to it. The simple package is £89 for the BackPedal Tracking Kit plus £5.99 a month for Stolen Bike Recovery, and you can see the plans on our homepage.
If your bike has already been stolen
Report it to the police and get a crime reference number, then mark it as stolen on BikeRegister and any other register you use, adding the reference number. After that, check local selling sites and tell nearby bike shops. Our guide to what to do if your bike is stolen covers the first 24 hours step by step.
FAQs
Is bike registration free in the UK?
Yes. Registering on BikeRegister and Immobilise is free. BikeRegister sells optional marking kits, but you don't need one to register.
Do e-bikes need to be registered with the DVLA?
Not if they meet the EAPC rules: a motor of no more than 250 watts that stops assisting at 15.5mph. Electric bikes outside those rules count as motorcycles or mopeds and must be registered, taxed and insured.
Where is the frame number on a bike?
Usually on the underside of the bottom bracket, where the cranks attach. If it isn't there, check the chainstays, down tube and top tube, or a sticker on carbon frames.
Can I register a bike after it's been stolen?
You can report it as stolen on BikeRegister even if it wasn't registered before. You'll need the frame number or other identifying details, which is why it's worth recording them now.
Conclusion
Registering your bike costs nothing and doesn't take long, so there's no good reason not to. Find the frame number, take photos, register it on BikeRegister and consider a marking kit as a deterrent.
Just don't mistake registration for a way of finding your bike. If you want a real chance of getting it back after a theft, take a look at how BackPedal works.