A plain reference · travel and subsistence

Your train ticket has no VAT on it. Nor does the flight. The taxi might.

One expense claim can carry five different VAT treatments. Here is the whole table, and the arithmetic of a system that defaults all of it to 20%.

Delivery charges work the same way. Stamps carry no VAT, but a delivery charge that forms part of a single supply of delivered goods follows the liability of those goods - so zero-rated goods should carry zero-rated delivery. See VAT on postage, stamps and delivery charges.
Food runs on the same logic. Zero-rated by default, standard-rated once it is catering, eaten on your premises, or hot - and a shared food court counts as your premises. See VAT on food and takeaways.
Motoring has its own block. VAT on buying a car is blocked unless it is used exclusively for business, leased cars carry a 50 per cent restriction on the rentals, and road tax has no VAT in it - see VAT on cars, fuel and motoring.
Passenger transport in anything built to carry ten or more passengers is zero-rated — trains, coaches, buses — along with any scheduled flight and any journey crossing the UK border. No VAT, nothing to reclaim. A taxi carries fewer than ten, so the supply is standard-rated, but there is only VAT on the receipt if that operator is registered. Hotels are 20% and genuinely recoverable. The congestion charge is outside the scope entirely.
Send me one month of expense claims and I will tell you what is being reclaimed that shouldn't be. No names needed - just the lines and the amounts. This is the fastest thing on the whole site to check and almost nobody gets all of it right. Free, back to you within one working day, and nothing follows unless you ask for it. Send me a month of claims.

Why a train ticket carries no VAT

Item 4 of Group 8 of Schedule 8 to the Value Added Tax Act 1994 zero-rates the transport of passengers in a vehicle, ship or aircraft designed or adapted to carry ten or more passengers. HMRC's guidance at VTRANS020100 sets out that test alongside three further routes into the zero rate: transport provided by the Post Office, any scheduled flight whatever the aircraft size, and any journey between a place in the UK and a place outside it, in either direction.

So the design of the vehicle decides it, not the distance, the price or the operator. A train, a coach and a London bus are all in. A car is not, because it was never built to carry ten people.

Three things the zero rate specifically excludes, and they look like ordinary travel: pleasure flights; transport to and from an airport car park where the car park provider supplies it; and transport to or around an entertainment or cultural venue supplied by whoever sells the admission. The airport one catches real businesses — the courtesy bus from the long-stay car park is standard-rated, while the flight it takes you to is not.

The whole table

ExpenseTreatmentReclaim?
TrainZero-ratedNo — there is none
Coach and busZero-ratedNo
Scheduled flightZero-rated, incl. Air Passenger DutyNo
International journey, any modeZero-ratedNo
Taxi, minicab, ride-hailingStandard-rated supplyOnly if the operator is VAT registered and gives a VAT receipt
Hotel and similar accommodationStandard-rated 20%Yes, with a valid VAT invoice
Meals bought while travellingStandard-rated when eaten in or hotYes, on the VAT shown
Congestion charge (public authority scheme)Outside the scopeNo
Tolls charged by a public authority under statuteOutside the scopeNo
Tolls on a privately operated crossingStandard-ratedYes
Car park run by a commercial operatorStandard-ratedYes
Parking or traffic penaltyNot consideration for a supplyNo
Airport car park courtesy transferStandard-rated — excluded from the zero rateYes
Employee mileageFuel element onlyYes, via advisory fuel rates, with fuel receipts held

On the congestion charge, HMRC's position at VATGPB8665 is that where a public authority runs the scheme under statutory powers, operating the zone is a non-business activity and the charge is not consideration for a supply at all. A scheme run by a private operator would be different.

The arithmetic of getting it wrong

One employee, one month, a system that treats everything as standard-rated and recovers a sixth.

Claim lineAmountReclaimed at 1/6Correct
Rail travel£180.00£30.00£0.00
Scheduled flight£240.00£40.00£0.00
Hotel£300.00£50.00£50.00
Taxis, driver not registered£60.00£10.00£0.00
Congestion charge£45.00£7.50£0.00
Total£825.00£137.50£50.00

That is £87.50 of input tax recovered that was never charged, on one person for one month. Ten travelling staff on a similar pattern is around £10,500 a year, and it is recoverable by HMRC for four years with interest.

This is the first thing an inspector looks at, and the easiest to prove. Travel claims are high volume, low value and almost always keyed by someone who is not a bookkeeper, which makes them the cheapest place for HMRC to find a systematic error. "Systematic" is the word that matters: once the pattern is established on a sample, the assessment is extrapolated across the whole period rather than limited to the receipts actually examined.

Three rules that fix most of it

References above are to HMRC's published guidance and the VAT Act 1994, linked in full. This page is a general reference and not advice on a particular business — if a line on your own claims does not match what is set out here, that is exactly the sort of thing worth sending over.