Category: Motor · Reviewed by Tim Roche, Director · PI & Commercial · Last reviewed 2026-06-05
Third party only motor insurance, commonly abbreviated to TPO, is the narrowest level of UK motor cover: it indemnifies the insured against legal liability to third parties for death, bodily injury or property damage arising from the use of the insured vehicle but does not pay for damage to, or theft of, the insured vehicle itself.
Category: Motor Also known as: TPO, third party motor insurance, act-only cover First codified: Road Traffic Act 1930; current statute Road Traffic Act 1988 Related legislation: Road Traffic Act 1988; Motor Vehicles (Compulsory Insurance) Regulations 2000 Apex Wiki link: /wiki/third-party-only-motor-insurance/
Third party only (TPO) motor insurance is the minimum level of motor insurance lawful in Great Britain. It satisfies, and does not exceed, the requirements of section 145 of the Road Traffic Act 1988, which mandates that a motor policy must insure the user against liability in respect of the death of or bodily injury to any person or damage to property caused by, or arising out of, the use of the vehicle on a road or other public place in Great Britain [1].
TPO is sometimes called ‘act-only’ cover, because it provides cover only for what the Act compels. The market expression ‘TPO’ typically refers to a slightly wider product that adds protections beyond strict act-only minimums (for example, broader geographic cover, off-road use cover, or modest add-ons such as legal expenses) but the defining feature remains that no indemnity is paid for damage to, or theft of, the insured vehicle [1].
TPO sits below third party fire and theft and comprehensive motor insurance in the standard three-tier UK retail motor market. It is the smallest segment by gross written premium and historically has been associated with higher-risk drivers (young, newly licensed, convicted, or returning to UK driving) for whom comprehensive cover is unaffordable, although insurer pricing data over the last decade has frequently shown TPO premiums equal to or exceeding those for comprehensive cover for the same driver and vehicle combination.
The product is regulated by the Financial Conduct Authority Handbook, in particular the Insurance: Conduct of Business Sourcebook (ICOBS), which applies to all retail motor insurance regardless of cover level [2].
The legal basis for the statutory minimum is Part VI of the Road Traffic Act 1988. Section 143(1)(a) provides that a person must not use a motor vehicle on a road or other public place unless there is in force in relation to the use of the vehicle by that person such a policy of insurance in respect of third-party risks as complies with the requirements of Part VI [1].
Section 145(3) sets out the requirements: the policy must be issued by an authorised insurer; it must insure such person, persons or classes of person as may be specified in the policy in respect of any liability that may be incurred in respect of the death of or bodily injury to any person or damage to property caused by, or arising out of, the use of the vehicle on a road or other public place in Great Britain; and it must insure in respect of the use of the vehicle in the territory of other relevant States to the extent required by those States [1].
The Motor Vehicles (Compulsory Insurance) Regulations 2000 (SI 2000/726) set the minimum property damage cover at £1.2 million per accident; cover for death and personal injury is unlimited [3].
Section 148 RTA 1988 voids policy conditions that purport to restrict cover by reference to certain matters (such as the condition of the vehicle, the number of passengers, or the weight or physical characteristics of goods carried) so far as they would defeat a third-party claim [1]. Section 151 confers the direct right of action by a third-party judgment creditor against the insurer. Section 152 sets out the limited grounds on which the insurer may avoid the policy as against the third party (notably misrepresentation of a material fact).
The framework derives from the consolidated Sixth Motor Insurance Directive 2009/103/EC, which continues to influence interpretation in retained EU law [4]. The Motor Insurers’ Bureau operates alongside the statutory regime to compensate victims of uninsured drivers [5].
A TPO policy provides the statutory minimum and little else. In the event of an accident in which the insured is at fault, the insurer pays the third party’s claim for death, injury or property damage (subject to the policy limits) but pays nothing in respect of damage to the insured vehicle. If the insured vehicle is written off as a result of a fault accident, the insured bears the entire cost of replacement.
If the accident is not the insured’s fault and the third party is insured or traceable, the insured recovers from the third party’s insurer through an uninsured-loss recovery process. If the third party is uninsured or untraceable, the insured may claim from the Motor Insurers’ Bureau under the Uninsured Drivers Agreement or Untraced Drivers Agreement, although the MIB does not pay for the first £300 of property damage and is subject to other published exclusions [5].
Theft of the insured vehicle, fire damage, malicious damage, accidental damage caused by the insured driver, vandalism by an unidentified party and damage caused by uninsured third parties (beyond the MIB scheme) are all uninsured under a TPO policy. Windscreen cover, courtesy car provision, breakdown assistance and personal accident benefit are not included unless purchased as add-ons.
For a broker placing TPO cover, ICOBS 5 requires identifying the client’s demands and needs and providing a personal recommendation where appropriate; the broker must explain in clear terms that the policy does not cover own-vehicle loss or damage [2].
The market distinguishes between ‘pure act-only’ cover (containing only the minimums required by section 145 RTA 1988) and ‘TPO’ as commonly sold, which adds modest enhancements (typically broader EU-wide use beyond statutory minimums, off-road and public-place cover, and basic personal liability while driving). Both fall short of third party fire and theft by excluding cover for fire damage to and theft of the insured vehicle.
Sub-products marketed as TPO include young-driver TPO (often combined with telematics insurance), convicted-driver TPO, and TPO for non-roadworthy or project vehicles being driven to MOT testing stations. Specialist TPO is also written for imported vehicles, kit cars and unusual vehicles where comprehensive cover is impractical to underwrite.
Internationally, the term ‘liability insurance’ or ‘liability-only’ is the equivalent in most US states; in EEA jurisdictions the local statutory minimum cover is comparable, harmonised under the Sixth Motor Insurance Directive [4].
An illustrative example: a 19-year-old who has recently passed the driving test buys a £1,500 hatchback. Comprehensive quotations are returned at over £3,000. TPO is quoted at £1,800 and the insured proceeds. The certificate is issued and uploaded to the Motor Insurance Database.
Three months later the insured is involved in a fault collision with a stationary parked car. The insured’s own vehicle is damaged beyond economic repair. The third party’s car requires £4,500 of repairs. The insurer pays the third-party claim in full. The insured receives nothing for the loss of their own vehicle and must fund a replacement. At renewal the insured loses their accrued no claims discount and the renewal premium is loaded. Figures are illustrative only.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-05. Next review: 2026-12-05.
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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