Can I Drive Someone Else’s Car on My Insurance?

Key things to know

1. Most UK car insurance policies do not cover you to drive a car you do not own, so never assume comprehensive cover extends to other vehicles.
2. The Driving Other Cars extension, where offered, is usually third party only and is typically restricted to drivers aged 25 and over.
3. You always need the owner’s permission; without it, any cover is void and you are driving uninsured.
4. Driving without insurance can lead to a £300 fine and six penalty points, on top of the cost of any damage caused.
5. Named driver cover and temporary insurance from about an hour to a month are common alternatives for borrowing a car.

Borrowing someone else’s car feels routine, especially between partners, family members and close friends. The insurance behind it is anything but routine. Most car insurance policies today cover only the car named on the policy, so driving another vehicle needs its own arrangement. This article answers the questions people most often ask before they borrow the keys, from what the Driving Other Cars extension actually provides to how to prove you are covered before you set off.

Can I Drive Someone Else’s Car on My Insurance?

Usually not. Car insurance attaches to the car itself rather than to you as a driver, and most policies contain no cover at all for vehicles you do not own. A handful of comprehensive policies include an extension called Driving Other Cars, or DOC, but it has become rare and is never automatic. If the extension is not listed specifically in your policy documents, the safe assumption is that you do not have it.

What Is the Driving Other Cars Extension?

DOC is an optional feature on some comprehensive policies. It allows the policyholder to drive a car they do not own, with the owner’s permission, and it is intended for occasional or emergency use rather than regular borrowing. It does not give you a right to drive any car you like. Every vehicle on the road must be insured under its own policy, and DOC sits on top of that requirement rather than replacing it. The borrowed car must itself be insured before you can drive it.

The extension is now uncommon. One industry estimate put the share of UK comprehensive policies including DOC as standard at just 2% in 2025. Insurers also restrict who gets it. Many will not offer it to drivers under 25, and some exclude people working in certain industries, such as the motor trade. Where it exists, it normally applies to the policyholder alone, not to named drivers on the same policy. If the wording on your documents is unclear, our glossary of car insurance terms explains the phrases insurers use.

Why Is DOC Cover Usually Third Party Only?

Because the extension is a backstop, not a substitute for insuring the borrowed car properly. Third party is the legal minimum level of motor insurance in the UK. It pays compensation for injury to other people, including passengers in the borrowed car, and for damage to other people’s vehicles or property when an accident is your fault.

What it does not do is cover the car you are driving. If you crash a borrowed vehicle while relying on DOC, the repairs come out of your pocket or the owner’s. Theft of, or fire damage to, the borrowed car is usually excluded as well. The result is a strange quirk of the market: a driver with a fully comprehensive policy on their own car drops to the bare legal minimum the moment they turn the key in someone else’s.

Does Comprehensive Cover Let Me Drive Any Car?

No. Comprehensive is the highest level of cover for your own car. It includes everything third party fire and theft covers, plus damage to your own vehicle in an accident, along with optional extras such as a courtesy car or legal expenses cover depending on the insurer. None of that transfers to other vehicles by default. Insurers decide exactly who and what each policy covers, and a comprehensive policy without a DOC extension leaves you with no cover to drive anyone else’s car at all.

Can I Borrow a Friend’s or Family Member’s Car?

Yes, provided you arrange cover properly. Permission from the owner is essential in every case: without it, any cover you thought you had is void and you are driving uninsured. There are three main routes.

Being added as a named driver on the owner’s policy suits regular sharing, such as partners who swap cars. Depending on the policy, a named driver can have comprehensive cover, so damage to the car itself is protected. Our guide to adding a named driver to your car insurance sets out how the process works and how it can affect premiums and no-claims discounts. One caution: the named driver must genuinely be an occasional driver of the car. Arranging the policy so the wrong person appears as the main driver is a type of insurance fraud known as fronting, which can invalidate the cover entirely.

Temporary car insurance covers a specific car for a fixed period, typically from about an hour up to around a month. It is often the simplest option for a one-off trip, and because it sits separately from the owner’s policy, a claim would not touch their no-claims discount.

Your own DOC extension, if you have one, will do for occasional or emergency use, but only on the third party basis described above.

What About Learners and Short-Term Situations?

Learner drivers need their own arrangement before practising in any car. A learner can be insured to practise in someone else’s car through that owner’s policy or through a separate learner policy, and the vehicle must meet the usual legal requirements, including tax and a valid MOT where one is due. Most people can start learning at 17, and a provisional licence, which costs £34 to £43, is needed before lessons or private practice. After passing the driving test, a new driver must hold an insurance policy that allows them to drive without supervision.

Short-term borrowing is where temporary insurance earns its keep. It can cover a single journey, a weekend or a few weeks, and specialist providers as well as mainstream insurers offer it. Before buying, check the period of cover, the excess and exactly who the policy covers. The rules differ in Northern Ireland, so check locally if the car or the driving happens there.

How Do I Check My Certificate of Insurance?

Look at your Certificate of Motor Insurance. If you have cover for driving other cars, the certificate will say so; if there is no mention of it, assume you do not have it. The certificate is the authoritative document, so it carries more weight than a summary page or a marketing description of the policy. If you cannot find your certificate, or the wording is unclear, contact your insurer and ask directly.

Two further checks are worth making before you drive. First, confirm the borrowed car itself is insured, which you can do using the askMID service. Second, make sure you meet the ordinary legal obligations that apply to any driver: the correct licence for the vehicle, the vehicle being taxed, and a valid MOT where required. Our article on telling your insurer about penalty points is also relevant here, since convictions affect the cover you can get and what you must disclose.

Can I Add DOC Cover to an Existing Policy?

Possibly, but ask before assuming. Some insurers will add the extension as a mid-term amendment, usually for an administration fee as well as an increase in the premium. In other cases the insurer may require you to cancel the current policy and take out a new one, which brings its own costs and complications. Remember that DOC cover is typically available only to drivers aged 25 and over, and where it is offered, it still applies on a third party only basis.

If you expect to borrow another car only now and then, adding DOC may cost more than it is worth. Temporary insurance for the occasions you need it is often the more practical choice.

What Should I Do If I Have an Accident in a Borrowed Car?

Stop and exchange details. If an accident causes damage or injury to any person, vehicle, animal or property, you must give your own name and address, the vehicle owner’s name and address, and the registration number of the car to anyone with reasonable grounds for asking for them. That duty applies whether you own the car or not.

After the immediate steps, the claims process follows the usual path, but with a twist: the claim may run through the car owner’s policy, or through yours if you have separate cover, depending on how the insurance was arranged. Our step by step guide to making an insurance claim explains what to expect. Be aware that if you were driving on DOC cover, damage to the borrowed car will not be met by your insurer, so the repair bill will need settling another way.

What Happens If I Drive Without Proper Cover?

You are breaking the law. Driving without insurance can result in a fixed penalty of £300 and six penalty points on your licence, and you would still owe for the insurance you should have had on top of any fine. Six points is a serious mark on any licence, and it can push up the cost of future cover.

The financial risk is larger than the fine. Without insurance, anyone injured, or whose property is damaged because of your driving, can pursue you personally for the cost. Even a minor collision involving a borrowed car could leave you facing a repair bill for that car plus damages to others, with nothing in place to meet it.

Watch for: Never take someone else’s keys on the strength of an assumption. Check the certificate of insurance or ask the insurer directly before you drive, every time.

If you are not certain you are covered to drive a particular car, make one phone call to your insurer before the keys change hands.

Questions answered

Does comprehensive car insurance let me drive any car?
No. Comprehensive cover applies to the car named on the policy. Some policies include a Driving Other Cars extension, but this is now rare and is usually third party only.

What is Driving Other Cars (DOC) cover?
It is an optional extension on some comprehensive policies that lets the policyholder drive a car they do not own, with the owner’s permission, usually for occasional or emergency use.

How do I check if I can drive someone else’s car?
Look at your Certificate of Motor Insurance, which will state whether you have driving other cars cover. If the wording is unclear or the certificate is missing, ask your insurer before you drive.

Can a learner driver use someone’s DOC cover?
Learners need their own arrangement for the car they practise in, either through the owner’s policy or a separate learner policy. Insurers commonly restrict DOC extensions to drivers aged 25 and over, so they are not a route for learners to rely on.