How Does Fuel Duty Work in the UK?
Fuel duty is a fixed tax charged per litre of petrol or diesel sold at UK forecourts. It's one of the largest components of what you pay at the pump — and understanding how fuel duty works in the UK explains why pump prices don't simply track the global oil price.
Here's exactly how it works, what you're paying, and why it matters.
What Is Fuel Duty?
Fuel duty is an excise duty — a tax levied on the production and sale of specific goods. In the UK, it's charged on road fuels including petrol, diesel, and some alternatives.
It is set by HM Treasury and collected by HMRC. The rate is fixed per litre regardless of the oil price, meaning it doesn't rise and fall with the market — it only changes when the government explicitly changes it, typically at a Budget.
According to gov.uk, fuel duty is one of the UK's largest sources of excise revenue.
How Much Is Fuel Duty in the UK?
The current fuel duty rate is 52.95p per litre for both petrol and diesel. This rate has been frozen since March 2011, with the exception of a temporary 5p cut introduced in March 2022 which was later made permanent.
Both road fuels carry identical duty — a common misconception is that diesel is taxed at a higher rate, but the duty is the same. The higher pump price for diesel reflects refining and supply factors, not taxation.
How VAT Stacks on Top of Fuel Duty
This is where the tax-on-tax element kicks in. VAT at 20% is applied to the total pump price — which already includes fuel duty.
So you pay VAT on the fuel duty itself, not just on the underlying fuel cost. Here's how the components stack up on a hypothetical 145p per litre petrol price:
| Component | Approximate amount | |---|---| | Fuel duty | 52.95p | | Wholesale fuel cost | ~52p | | Retailer margin | ~6–8p | | Subtotal (ex-VAT) | ~112–114p | | VAT at 20% | ~23–24p | | Total pump price | ~145p |
The RAC publishes a regular pump price breakdown showing these components in live figures. At typical pump prices, tax (duty + VAT) accounts for around 55–60% of what drivers pay per litre.
How Does Fuel Duty Work at the Budget?
Fuel duty rates are set and adjusted at the Autumn Statement or Spring Budget. The Chancellor announces any changes, which typically take effect immediately or within days.
Since 2011, fuel duty has been frozen rather than increased — successive governments have cited the cost of living impact of rises. The RAC and AA have both consistently lobbied for duty freezes and cuts, arguing that households depend heavily on car travel for work and essential journeys.
What Happens If Duty Changes?
- A duty increase is passed through to pump prices immediately — retailers adjust at the forecourt within hours or days
- A duty cut should reduce pump prices by the same amount, though the AA has noted that cuts are not always passed on as quickly as increases
The asymmetry in how rises and cuts reach the pump has been a recurring point of criticism from motoring groups and the Competition and Markets Authority (CMA).
How Does Fuel Duty Compare to Other Countries?
The UK's fuel duty rate is among the highest in Europe, though several EU nations have comparable or higher rates. The key difference is that the UK applies VAT on top of a high duty base, compounding the overall tax burden.
Gov.uk publishes comparative international fuel duty statistics as part of its energy price data series, showing UK rates in European context.
Does Fuel Duty Apply to All Fuels?
No — duty rates vary by fuel type:
- Petrol and diesel (road use): 52.95p per litre
- LPG (liquefied petroleum gas): lower rate — approximately 28.88p per kg
- Natural gas (road use): separate lower rate
- Red diesel (off-road, agricultural): heavily rebated rate — not for road use
- Aviation fuel: separate rate, not covered by road fuel duty
- Electric vehicles: no fuel duty — one reason EVs have significantly lower running costs per mile
As EV adoption grows, the long-term revenue question around fuel duty replacement is a live policy debate. Gov.uk has acknowledged that duty receipts will decline as the vehicle fleet electrifies.
Why Does Fuel Duty Matter for Pump Prices?
Because it's a fixed cost embedded in every litre, fuel duty sets a price floor that pump prices cannot fall below regardless of oil market conditions.
When crude oil prices collapse — as happened dramatically in 2020 — pump prices fall, but only down to the floor set by duty plus VAT plus minimum retailer margin. This is why UK pump prices never approach the very low levels seen at the wholesale level during oil price crashes.
To see how current pump prices break down near you, compare local fuel prices across thousands of UK stations.
Practical Takeaways for UK Drivers
- Fuel duty is 52.95p per litre — identical for petrol and diesel
- VAT at 20% is applied on top of the full pump price, including the duty — so you pay tax on the tax
- Together, duty and VAT account for roughly 55–60% of the pump price at typical market rates
- Duty only changes at a Budget — freeze since 2011 has kept it stable
- Pump prices can't fall below the duty + VAT floor regardless of oil prices
Frequently Asked Questions
How does fuel duty work in the UK?
Fuel duty is a fixed tax of 52.95p per litre charged on petrol and diesel. It's collected by HMRC and set by HM Treasury at the Budget. VAT at 20% is then applied on top of the full pump price, which already includes the duty.
How much fuel duty do I pay per litre?
The current rate is 52.95p per litre for both petrol and diesel, as confirmed on gov.uk. This has been frozen since 2011, with a 5p temporary cut made permanent in 2022.
Is diesel taxed more than petrol in the UK?
No. Fuel duty is identical for petrol and diesel at 52.95p per litre. The higher pump price for diesel reflects refining complexity and global supply factors, not a higher tax rate.
What percentage of the petrol price is tax?
At typical pump prices, tax (fuel duty plus VAT) accounts for approximately 55–60% of what you pay per litre. The RAC publishes a live breakdown of these components.
Does fuel duty apply to electric vehicles?
No. Electric vehicles don't use petrol or diesel, so no fuel duty applies. This is one of the main reasons EVs have significantly lower per-mile running costs than equivalent petrol or diesel vehicles.