Category: Telematics · Reviewed by Chrissie Anderson, Client Executive · Last reviewed 2026-06-10
Pay-how-you-drive (PHYD) is a form of motor insurance in which premium, eligibility or no-claims treatment is adjusted by reference to a behavioural “driver score” derived from telematics observations such as acceleration, braking, cornering, speed in relation to posted limits, time of day and, in some products, phone-handling events.
Category: Telematics Aliases: PHYD, behavioural motor insurance, driver-score insurance, behaviour-based UBI Established: UK launches from c. 2010 (Insure The Box, Co-operative Insurance Smartbox); app-based products from c. 2014 Related: Pay-as-you-drive, Driver scoring, Telematics insurance / UBI, Black box car insurance
PHYD policies price motor risk on how the vehicle is driven rather than only how far. A telematics device, OBD-II dongle or smartphone application records discrete driving events; these are aggregated into a driver score that feeds the rating algorithm. The score may govern an introductory discount, mid-term re-pricing, renewal pricing or, in some young-driver products, eligibility to remain on cover.
PHYD differs from pay-as-you-drive in that mileage is not the principal pricing axis; many UK products combine both. Driver-score methodology is treated in detail under driver scoring.
A PHYD motor policy must comply with the compulsory cover requirements of Part VI of the Road Traffic Act 1988. Behaviour-based pricing does not affect the statutory minima.
Conduct rules in the FCA Handbook apply throughout. PROD 4 requires the manufacturer to identify a target market and a distribution strategy under which the product will deliver fair value; behavioural products marketed primarily to young or higher-premium drivers require careful target-market specification. ICOBS 6 governs the policy summary; ICOBS 7 governs mid-term changes; ICOBS 8 governs claims handling, including the use of telematics data as evidence.
The Consumer Duty in PS22/9 (July 2022) brings the consumer understanding and price and value outcomes to bear: a customer should be able to understand how scoring affects price, and the product should provide fair value relative to benefits. Where a poor score leads to cancellation, FCA expectations on cancellation handling and Financial Ombudsman Service jurisprudence on telematics cancellations (see e.g. published FOS decisions on black-box cancellations from 2018 onwards) are directly engaged.
Where scoring is used as the sole basis for an adverse decision (renewal refusal, cancellation, large premium increase), Article 22 of the UK GDPR on solely automated decision-making, including profiling, is engaged. The Information Commissioner’s Office’s 2024 guidance on connected vehicles and its earlier general guidance on automated decision-making and profiling are the relevant supervisory references.
A telematics platform aggregates event data into a score. Typical inputs include longitudinal acceleration above a threshold (commonly 0.4 g), lateral acceleration in cornering, deceleration in braking, speed in relation to mapped limits, time of day weights and, increasingly, phone-handling derived from gyroscope and screen-state signals. The supplier publishes a per-event weighting and computes an aggregate score on a 0–100 or letter scale.
The insurer’s rating engine maps the score to a rating factor; PHYD-only products may re-price mid-term, while PHYD-PAYD hybrids apply the score as a multiplier on the mileage rate. Younger-driver products include a “warning, second warning, cancellation” cascade, and may impose curfews or mileage limits with breach penalties.
UK PHYD products include the Aviva Drive app, Direct Line DrivePlus, Admiral LittleBox, Hastings YouDrive, Marmalade, the Marshmallow app score, and a number of broker-distributed fronted products. Embedded variants are appearing in connected-car factory feeds, with insurer access to vehicle-generated data under consent. EU Regulation 2019/2144 (“General Safety Regulation”) and the data provisions of the EU Data Act (Regulation (EU) 2023/2854) are likely to shape the longer-term landscape.
A 24-year-old comprehensive policyholder uses an app-based PHYD product. Over three months the algorithm records two harsh-braking events per 100 miles, no late-night driving, and minor speeding (over the posted limit by ≤5 mph) on 6% of segments. The driver score is 82. The renewal engine applies a –9% modifier to the baseline premium and the customer’s annual price falls.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-10. Next review: 2026-12-10.
Apex Insurance Brokers Limited. Authorised and regulated by the Financial Conduct Authority, FRN 724952. Registered in England and Wales, Companies House 07014570. This entry provides general information about UK insurance concepts and is not regulated advice. Consult your insurance broker on your specific position.
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