Drivers

How long does it take to fit a black box, and are you covered?

Black box fitting deadlines run 7 to 30 days in published ombudsman cases. Cover usually starts first, but missing the deadline can cost you.

How long does it take to fit a black box? The real answer is "however long your policy gives you": published ombudsman cases show fitting deadlines of 7, 14, 15 and 30 days, so the number in your own policy documents is the one that counts. In most cases your cover starts on the policy start date, before the box is in the car, but if the deadline passes without it being fitted you can lose your discount or have the policy cancelled.

That is why different sources quote different deadlines. Each insurer writes its own telematics terms, and the deadline, the fitting method and what happens if you miss it all come from that wording.

How long does it take to fit a black box?

There are two clocks to think about: how long the fitting itself takes, and how long you have to get it done.

The fitting depends on the type of device. Which? describes three main kinds: larger GPS units that need professional installation, small trackers that plug into a port under the dashboard, and tags you stick on the windscreen. Some policies skip the box altogether and use a phone app instead. A plug-in or stick-on device is something you fit yourself, so the timing is in your hands once it arrives. An engineer-fitted box needs an appointment, so the timing depends on when a slot is available.

The deadline is set by the policy. These are real examples from Financial Ombudsman Service decisions:

Check two things in your own documents: the number of days, and whether the clock starts when you buy the policy, when cover starts or when the box arrives. In the seven-day case, the box arrived five days into the policy, leaving two days to fit it, which the ombudsman said "does seem very short".

Do you need to fit a black box before driving?

Usually not. A black box policy is a live insurance policy from its start date, and the fitting is a condition you meet within a set number of days afterwards. In the seven-day case above, the policy "started immediately" and the box was posted out afterwards. In the 30-day case, when the box was never fitted, the insurer wrote that "rather than cancel your policy and leave you without insurance, we have removed the discount", which shows cover was in force without the box.

So you can normally drive before installation. What you should not assume is that every term is identical before and after fitting. When you read the policy schedule and the telematics terms, look for:

• the fitting deadline and when it starts
• whether any different excess, restriction or condition applies until the box is fitted
• whether you need to pair a phone app as well as fit the box (in one case the box was fitted but the app was not working, and the discount was still removed)
• any fee for a missed engineer appointment or a replacement box

If the policy is cancelled and you carry on driving, you are uninsured. GOV.UK sets out a £300 fixed penalty and 6 penalty points for that, or an unlimited fine and a possible driving ban if it goes to court, and the police can seize the car. For someone who passed their test recently, 6 points within 2 years of passing means the licence is revoked.

Self-fit vs engineer-fitted black box: what's the difference?

Neither is better in every situation. If you work weekdays and the installer only offers weekday slots, a self-fit device may be easier to get done in time. In one ombudsman case, a policyholder who could not make weekday appointments never got the box fitted and lost the discount. If you are not confident fitting it yourself, an engineer visit takes that job off your hands, but it depends on getting a slot before the deadline.

What happens if you miss the black box fitting deadline?

It depends entirely on the wording, but the published decisions show three outcomes:

1. The discount is removed. In one case this meant an extra £394.07 to pay. In another, the insurer told the policyholder the premium had roughly doubled, though a fault claim had also been made around the same time.
2. A fee is charged, for example for a missed engineer appointment.
3. The policy is cancelled, sometimes with a cancellation fee and any balance still owed.

A cancellation matters beyond the fee. In one decision the ombudsman noted that the customer would need to tell future insurers about it. The ombudsman has also said that young drivers raised more than 1,200 car insurance complaints in 2025, with policy cancellations the most common issue.

The ombudsman will back an insurer that follows clear terms. In the 14-day case, the firm showed it had made clear before the sale that it was a telematics policy, and had explained the deadline in the welcome pack and in cancellation warning letters, and the complaint was not upheld. But it looks at fairness too. Where a customer said her box had not arrived and no replacement was sent, the ombudsman said the insurer's "immediate reaction should have been to ensure another box was provided", and ordered it to refund the £56 cancellation fee, pay £200 compensation and remove or amend the cancellation record.

If you are running close to the deadline:

1. Contact whoever you bought the policy from before the deadline, not after.
2. Tell them exactly what the problem is: box not arrived, app not working, no appointment available.
3. Ask for a replacement box or an earlier appointment, and ask in writing whether the deadline can be extended.
4. Keep a note of dates, names and emails, and use a monitored contact route. In one case the customer emailed a "noreply" address, which did not help them.
5. If you think you were treated unfairly, complain to the firm. If you are unhappy with the reply, or have not had one after eight weeks, you can take it to the ombudsman.

What happens to the black box if you change or sell your car?

This is the part most guides skip, and it can catch people out mid-policy.

Changing car. The box usually does not move with you. In one decision, the terms said a new box "must be installed in the new Car within 14 days of asking us to change your Policy", that an engineer fitting would carry a fee, and that the policy would be cancelled if that did not happen. The same case showed that a box may not suit every vehicle: the policy could not cover the replacement car, so the policyholder cancelled it. Which? also notes that some providers charge a fee to carry on with a black box in a new car. Fees are set out in the policy, and the ombudsman has stepped in where they were applied unfairly; in one case it cut a charge for vehicle changes where no new box was ever sent.

So before you buy a different car, ask whoever arranged the policy whether the new car is acceptable, what the change fee is and how long you will have to fit the new box.

Selling the car. Under the terms in that same decision, the box stayed in the car and data collection stopped, professional removal was available for a fee, and the policyholder was told not to remove it themselves. The terms also said that if you sell, you must contact the insurer to deactivate the box and tell the new owner a telematics device is fitted.

Cancelling the policy. Which? says most providers disconnect the box remotely rather than sending someone out, but you could be charged if you want it removed.

Is a black box worth it for a young driver?

The ombudsman's own view is that telematics policies "can be good and offer reduced premiums for 'good' driving", but if your driving does not match what the policy expects, you can lose those benefits or have the policy cancelled. It has highlighted cases where young drivers' policies were cancelled when the car sat unused during university breaks.

The price of any black box policy depends on the insurer's own rating as well as how you drive once the box is fitted, so nobody can promise a figure in advance. What you can control is reading the terms: the fitting deadline, what the box measures, what a low score leads to, and the fees for changes. If a parent's car is involved too, this guide on learner drivers and no claims bonuses covers how that side works.

If you want to look at black box and other options, you can get young driver insurance quotes: you fill in a short form, and a specialist FCA-authorised broker from Kompare's panel contacts you with quotes and can explain the telematics terms on each one before you decide.