What is a black box car insurance policy and what does it record?

Telematics exists because conventional motor pricing has very little to work with for a new driver. Without a claims history, an insurer prices on age, postcode and vehicle, which is a blunt instrument that penalises careful drivers and cautious ones alike. A telematics policy replaces some of that guesswork with observation. The trade is straightforward: you accept being measured, and the price reflects what is measured rather than what is assumed.

Safety

Step by step

1. Find out which kind of device the policy uses.A hardwired box fitted by an engineer, a self-install unit plugged into the OBD port, a windscreen-mounted tag paired with a phone, or an app alone. They differ in accuracy, in whether they can be removed, and in what happens if the phone is in someone else's car. The type matters more than it sounds.
2. Ask exactly what goes into the score.Insurers weight the components differently and publish the components rather than the formula. Common inputs are harsh braking and acceleration, cornering forces, speed relative to the limit for the road, the time of day journeys happen, and total mileage. Smoothness usually matters more than speed alone.
3. Understand what the score is used for.Depending on the product it can adjust the price at renewal, trigger a mid-term rebate or surcharge, unlock extra miles, or in poor cases lead to warnings and eventually cancellation. Read which of those applies before you buy, because they are quite different products under one label.
4. Check the mileage limit and what exceeding it costs.Many telematics policies cap annual mileage and sell additional miles if you go over. Some cancel for a serious overrun. Estimate honestly rather than optimistically, and check how the cap is measured and how you are warned as you approach it.
5. Check for time-of-day restrictions.Some policies penalise or restrict driving between late-night hours, because that is when the claims data is worst for younger drivers. Others simply score it. If shift work means driving at those times, that is a question to ask before buying, not after the first score drops.
6. Understand how the data is used in a claim.This cuts both ways. Telematics data can corroborate your account of a collision — speed, direction, the moment of impact — and insurers do use it that way. It can equally contradict an account. It also makes fronting effectively undetectable-proof, because the record shows when journeys happened and from where.
7. Read the data-protection terms.Ask how long journey data is retained, whether it is shared with third parties, what happens to it when the policy ends, and how you can request a copy. You have data protection rights over it regardless, and a policy that is vague about this is worth a second look.
8. Plan for removal at the end.A hardwired box should be removed or deactivated when the policy ends, particularly before selling the car. A dormant unit left wired in can draw a small current and it is one of the things worth checking when buying a used car that has had a young owner.
9. Treat a poor score as information, not a verdict.Most scores are dominated by a small number of harsh events. Anticipating further ahead, braking earlier and easing off before corners moves the score more than driving slowly does. If the score seems wrong — a passenger's phone, a bump in a car park, a road with a misidentified speed limit — dispute it, and escalate to a formal complaint if the insurer does not engage.

Tips

• Ask whether the score is journey-weighted or event-weighted. A single harsh event on a two-mile trip can hurt far more than the same event on a long motorway run, and knowing which model applies changes how you interpret a bad week.
• Check whether the app or box distinguishes drivers. On a policy with more than one driver, a phone-based system may credit or blame the wrong person.
• If a score depends on speed relative to the limit, expect occasional errors on roads where the limit has changed or where the map data is wrong. Report them — the data is correctable.

Common mistakes

• Assuming the score is only about speed — Smoothness, time of day and mileage usually carry as much or more weight. Careful drivers sometimes score badly purely on braking events caused by following too closely.
• Underestimating annual mileage to get a lower price — On a telematics policy the mileage is measured, not estimated. Exceeding the limit costs money or, in some products, ends the policy.
• Leaving a box wired in after the policy ends — It can draw current, it is a data question when the car is sold, and the provider is generally responsible for removal or deactivation. Ask them to deal with it.

Questions people ask