# Are carpooling apps legal in the UK? The cost-sharing rules

> Yes. A carpooling app is legal in the UK while drivers only recover the running costs of each trip, including wear and depreciation, and the contribution is agreed before the journey. The Road Traffic Act 1988 then stops a private motor policy excluding the trip from its compulsory cover, in a car carrying up to 8 passengers. Once a driver makes a profit, that protection goes, and the trip needs licensing and hire and reward insurance.

By Joe, founder of Dispatch AI. Updated 2026-10-18. The web page: https://dispatchai.co.uk/guides/carpooling-and-lift-share-apps-uk-rules/

A lift-share app looks like the easy way into ride-sharing: no licences, no fleet, drivers who are going that way anyway. That holds only while the money stays inside one legal limit. This guide sets out the cost-sharing rules in the two Acts that matter, how insurance treats car sharing, what counts as running costs, and what your app has to build in to keep its drivers on the right side.


## Is a carpooling app legal in the UK?

Yes, as long as drivers only share costs. Two Acts set the same test from different sides.

Section 1(4) of the Public Passenger Vehicles Act 1981 says a journey where passengers pay separate fares isn't made in the course of a business of carrying passengers if the fares don't exceed the running costs of the vehicle for the journey, and the payment was arranged before the journey began. Running costs include an appropriate amount for depreciation and general wear.

Section 150 of the Road Traffic Act 1988 applies the same limits to insurance. A policy restricted to non-commercial use, such as social, domestic and pleasure, or one that excludes hire or reward, has to treat a car-sharing journey as covered for the liabilities the law makes compulsory. That holds when the vehicle isn't adapted to carry more than eight passengers and isn't a motorcycle, the fares don't exceed the running costs, and the fare arrangements were made before the journey began.

Here's what that means for a lift share app:

| The rule | Where it comes from | What your app should do |
|---|---|---|
| Fares no higher than the car's running costs for the trip | 1981 Act s.1(4), 1988 Act s.150 | Cap the contribution a driver can ask, and show how it's worked out |
| Running costs include depreciation and general wear | Both Acts | Base the cap on a per-mile figure that covers more than fuel |
| Payment agreed before the journey | Both Acts | Fix the contribution when the passenger books, never afterwards |
| No more than eight passengers, no motorcycles | 1988 Act s.150 | Limit seats per car and keep motorbikes out |
| No profit for the driver | Liftshare's account of the insurers' agreement | Block prices above the cap, including surge-style pricing |


## What counts as running costs?

The Acts don't set a pence-per-mile figure. They say running costs for the journey, including an amount for depreciation and general wear, so fuel alone understates the limit and a profit margin overstates it.

Two published figures help you set a sensible cap:

- **HMRC's approved mileage allowance** for cars and vans is 55p a mile for the first 10,000 miles from 6 April 2026, up from 45p, and 25p a mile after that. That's HMRC's approved rate for the mileage allowance employers pay staff for business travel. It's a benchmark, not the legal test.
- **Liftshare's fuel example** works out fuel at about 16.27p a mile, from 0.1171 litres a mile at £1.39 a litre. Liftshare says its suggested contributions line up with HMRC's approved mileage allowance payments.

The limit applies to what all the passengers pay together, not to each of them. Liftshare's own example shows how sharing keeps the total well under it: a one-way journey costing £12, shared by the driver and 2 passengers, is divided by 3, so each passenger pays £4 and the passengers together pay £8.

Here's an example of a cap in practice. If your app used HMRC's 55p as its ceiling, a 20-mile trip would cap the passengers' contributions at £11 in total, so three passengers would pay no more than £3.66 each. Whatever figure you pick, show drivers and passengers the sum, so nobody has to guess whether a price is lawful.


## How does car sharing insurance work?

On the driver's own policy, while the trip stays within the cost-sharing rules. Section 150 of the 1988 Act stops a social, domestic and pleasure policy from excluding a qualifying car-sharing journey from the cover the law makes compulsory, however the policy is worded. Insurers have gone further than the Act.

Liftshare tells its members that all ABI motor insurers have agreed that passengers' contributions towards running costs won't affect cover, as long as the lift is in a vehicle seating eight passengers or fewer. The same page says the agreement doesn't apply if the driver makes a profit or carrying passengers is their business, and it tells drivers to check with their own insurer because terms vary.

Profit changes the policy you need. The Association of British Insurers says that if you carry passengers who are charged a fare, you need the right level of hire and reward insurance. Our guide to [insurance for a ride-hailing business](https://dispatchai.co.uk/guides/insurance-for-a-ride-hailing-business/) covers that cover.


## When does a lift-share app need a licence?

When drivers charge more than their costs. The 1981 Act's cost-sharing rule then stops protecting the journey, and two sets of licensing rules come into play.

A car carrying passengers at separate fares in the course of a business is a public service vehicle under section 1 of the 1981 Act. The private hire Acts don't help either: section 75 of the Local Government (Miscellaneous Provisions) Act 1976 exempts weddings, funerals and a few other uses, but has no exemption for lift sharing. Liftshare warns its members that overcharging could be viewed as operating a taxi service without a licence, which could invalidate their insurance.

Watch your own fees as well. Section 1(5) of the 1981 Act treats a payment as a fare whoever it's made to, and even if it pays for other things besides the journey. A booking fee or subscription charged to passengers could count towards the total that has to stay within running costs. Take legal advice before you add one.

If you want drivers to earn, build a licensed service instead, and expect the regulator to look hard at it. TfL says applications for new, novel or ridesharing services involve discussion of the operating model and system infrastructure, and can take significantly longer than the typical 16 weeks. Section 11 of the Transport Act 1985 lets licensed private hire cars carry passengers at separate fares when every passenger books ahead and agrees to share, and our guide on [how to start a ride-sharing app](https://dispatchai.co.uk/guides/how-to-start-a-ride-sharing-app-uk/) walks through the licences. A licensed firm also needs booking software; Dispatch AI is booking and dispatch software for taxi and private hire firms, which is a different product from a cost-only lift-share app.


## What does a lawful lift-share service look like?

Liftshare is one UK example. It's run by Mobilityways Limited, a company registered in Norwich, and shows a suggested contribution for each journey based on distance and how many people are sharing. Members make the payment arrangements directly between themselves.

Liftshare doesn't sit in the middle of the money. It says it works with 700+ organisations, including large employers, which points to a model that fits the law: sell car-share schemes to organisations instead of taking a cut of drivers' contributions. Our guide to [how ride-hailing apps make money](https://dispatchai.co.uk/guides/how-ride-hailing-apps-make-money/) compares that with commission-based models.


## What should your app build in?

Six features keep your drivers inside the rules:

1. A contribution calculator tied to distance, with a ceiling the driver can't override.
2. A price fixed at booking and shown to the passenger before the trip.
3. A seat limit of eight passengers, with motorcycles excluded.
4. No surge or demand pricing, which can push a price above costs.
5. A plain statement to drivers that profit takes them outside their ordinary insurance.
6. A data protection plan: pay the data protection fee to the ICO unless you're exempt, because you'll hold members' names, numbers and journeys.

For the legal vocabulary behind all this, see [ride-sharing vs ride-hailing in UK law](https://dispatchai.co.uk/guides/ride-sharing-vs-ride-hailing-uk-law/).

## Frequently asked questions

### Can I charge passengers for petrol when I give them a lift?

Yes, up to the running costs of the car for that journey, including wear and depreciation, as long as you agree the amount before you set off. Charge more than that and you lose the cost-sharing protection in both the 1981 and 1988 Acts.

### Do I need to tell my insurer I'm car sharing?

The 1988 Act protects the compulsory part of a private policy on a qualifying car-sharing trip, however the policy is worded. Liftshare still advises drivers to check with their own insurer, because terms vary between providers, and that's a sensible step before your first shared trip.

### Can a carpooling app take a commission?

It's risky. The 1981 Act counts a payment as a fare whoever receives it, so a commission or booking fee paid by passengers could push the total over the car's running costs. Get legal advice on your fee model before launch.

### Does the cost-sharing rule cover minibuses?

No. Section 150 of the 1988 Act only covers vehicles adapted to carry no more than eight passengers. GOV.UK says operating a vehicle that can carry 9 or more passengers for hire or reward needs a PSV operator licence.


## Sources

- [Public Passenger Vehicles Act 1981, section 1 (legislation.gov.uk)](https://www.legislation.gov.uk/ukpga/1981/14/section/1) the cost-sharing rule, hire or reward, separate fares
- [Road Traffic Act 1988, section 150 (legislation.gov.uk)](https://www.legislation.gov.uk/ukpga/1988/52/section/150) insurance for car-sharing arrangements
- [Local Government (Miscellaneous Provisions) Act 1976, section 75 (legislation.gov.uk)](https://www.legislation.gov.uk/ukpga/1976/57/section/75) exemptions from private hire licensing
- [Transport Act 1985, section 11 (legislation.gov.uk)](https://www.legislation.gov.uk/ukpga/1985/67/section/11) licensed cars at separate fares
- [What are the legal and insurance implications of car sharing? (Liftshare)](https://hub.liftshare.com/en/knowledge/what-are-the-legal-and-insurance-implications-of-car-sharing?hsLang=en) the ABI insurers' agreement and its limits
- [Liftshare's guide to journey costs and suggested contribution (Liftshare)](https://hub.liftshare.com/en/knowledge/liftshares-guide-to-journey-costs-and-suggested-contribution?hsLang=en) fuel per mile, the £12 example, overcharging
- [Liftshare (Mobilityways)](https://liftshare.com/uk) suggested contributions, payments between members, 700+ organisations
- [Travel: mileage and fuel rates and allowances (GOV.UK)](https://www.gov.uk/expenses-and-benefits-business-travel-mileage/rules-for-tax) 55p a mile from 6 April 2026
- [Motor insurance (Association of British Insurers)](https://www.abi.org.uk/products-and-issues/choosing-the-right-insurance/motor-insurance/) hire and reward cover
- [PSV operator licences (GOV.UK)](https://www.gov.uk/psv-operator-licences) 9 or more passengers
- [Private hire operator licence (TfL)](https://tfl.gov.uk/info-for/taxis-and-private-hire/licensing/private-hire-operator-licence) new, novel or ridesharing services, 16 weeks
- [Data protection fee (ICO)](https://ico.org.uk/for-organisations/data-protection-fee/) who has to pay

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