UK Fuel Duty Explained — Tax Per Litre 2026

Every time you fill up, more than half of what you pay goes directly to the Treasury before anyone makes a penny on the actual fuel. Most drivers know fuel is heavily taxed but few realise quite how much. At today's pump price of around 156p per litre for petrol, here is exactly where your money goes.

Where your 156p actually goes

52.95p

Fuel duty — fixed tax per litre

~26p

VAT at 20% (on everything including duty)

~77p

Wholesale fuel cost + retailer margin

So on a 156p litre of petrol, roughly 79p — just over half — goes to the government in duty and VAT. The actual refined fuel costs around 67p, and the retailer typically keeps 8-12p to cover the forecourt, staff and profit. Supermarkets often run on even thinner margins — as low as 5p per litre — because cheap fuel brings shoppers through their doors.

What is fuel duty?

Fuel duty is a flat tax charged on every litre of petrol or diesel sold in the UK. It is fixed at 52.95p per litre regardless of what oil costs on the global market. Whether crude oil is at $50 a barrel or $120 a barrel, you pay the same 52.95p in duty. This is why pump prices do not move in direct proportion to oil prices — the fixed duty component acts as a floor. (source)

The current rate of 52.95p includes a temporary 5p cut first introduced in March 2022 when oil prices spiked following Russia's invasion of Ukraine. That cut has been extended multiple times and currently remains in place until 31 August 2026. Before the cut the rate was 57.95p per litre — itself frozen since 2011. In real terms, accounting for inflation, fuel duty has actually fallen significantly over the past 15 years.

The tax on a tax problem

VAT is charged at 20% on fuel — but it is applied to the total price including fuel duty. This means you are effectively paying tax on a tax. On the 52.95p of duty you pay, the government also collects a further 10.59p in VAT. This quirk of the system means the government's total take is higher than many drivers realise, and it increases automatically when fuel prices rise — the government collects more VAT revenue whenever wholesale costs push prices up.

    On a 55-litre fill-up at 156p per litre (total: £85.80):

    Fuel duty: £29.12 · VAT: ~£14.30 · Total tax: ~£43.42

    The actual fuel and retailer margin: ~£42.38

What is changing in September 2026?

The temporary 5p cut expires on 31 August 2026. From 1 September 2026 fuel duty will increase by 1p per litre, then by a further 2p on 1 December 2026, and another 2p on 1 March 2027 — gradually returning to the pre-2022 rate of 57.95p per litre. For the average driver filling up weekly, the full reversal of the cut will add around £2.75 per fill-up compared to today.

This is worth knowing when planning ahead. If you are considering a long journey or a period of higher mileage, doing it before September 2026 will save you money at the pump on top of whatever fuel prices are doing at the time.

Why is UK fuel so heavily taxed?

The government raises around £25 billion per year from fuel duty — equivalent to roughly £850 per household. It serves several purposes beyond pure revenue: higher fuel costs are intended to discourage unnecessary journeys and reduce carbon emissions, and fuel duty is one of the most efficient taxes to collect since it is unavoidable for most drivers.

The UK has some of the highest fuel taxes in Europe. The average fuel duty rate across EU member states is around 50p per litre for petrol — the UK's 52.95p is above that average, and before the 2022 cut was among the highest in the world.

What you can control

Fuel duty and VAT are fixed — you cannot avoid them. The wholesale cost of the fuel itself is broadly similar everywhere. The only real variable is the retailer's margin — the 8-12p per litre that different forecourts charge differently. That is where Save at the Pump helps. By finding the station with the lowest margin near you, you can save the only money that is actually up for grabs at the pump.