Fuel duty explained: 52.95p a litre, and the January 2027 cliff-edge

What is fuel duty and how much is it in 2026?

Fuel duty — formally hydrocarbon oil duty, charged under the Hydrocarbon Oil Duties Act 1979 — is an excise duty levied on every litre of road fuel when it leaves a refinery or bonded warehouse. It never appears as a line on your receipt, because by the time the fuel reaches the forecourt the duty is already baked into the price on the pole.

The rate on unleaded petrol and diesel is 52.95p per litre. It has sat there since 6pm on 23 March 2022, when the Spring Statement cut the long-frozen 57.95p rate by 5p, and it is legislated to run to 31 December 2026. Bioethanol and biodiesel supplied for road use are charged at the same 52.95p, so a tank of E10 pays exactly what a tank of E5 pays. The rate table is published by HMRC in Amended Fuel Duty rates: 2026 to 2027.

How much tax is in a litre of petrol?

In the week commencing 24 August 2026 the average UK pump price was 161.63p a litre for unleaded petrol and 182.82p for diesel, according to the DESNZ weekly road fuel prices series. Here is exactly where that money goes.

Method, so you can check it: VAT at 20% is one-sixth of a VAT-inclusive price, so 161.63 ÷ 6 = 26.94p of VAT. Strip that out and the price excluding VAT is 134.69p. Take off the 52.95p of duty and 81.74p remains — the wholesale fuel itself plus delivery, distribution and the retailer's margin. That is the same three-way split DESNZ uses in Quarterly Energy Prices. Shares are rounded to one decimal place and so may not sum to exactly 100%.

Diesel's tax share is lower than petrol's — 45.6% against 49.4% — purely because the product underneath it is dearer. The duty is the same 52.95p on both. VAT is the only tax that rises when the oil price rises.

Why every 1p of duty costs you 1.2p

This is the bit almost every news report leaves out. VAT is charged on the duty-inclusive value of the fuel, not on the product alone. HMRC's VAT Notice 700 puts it plainly at section 7.7: for goods subject to excise duty, the taxable value is the ordinary value plus the duty. So the 52.95p of fuel duty generates 10.59p of VAT all by itself.

Add the two together and fuel duty really costs you 63.54p a litre at the pump, not 52.95p. Every 1p on the duty rate is 1.2p on the price you pay. For a driver getting through around 807 litres a year, the VAT charged on the duty alone comes to roughly £85 a year — on top of about £427 of duty. Keep that 1.2× multiplier in mind for everything that follows: when the press says "3p", the forecourt says 3.6p.

The cliff-edge: 1 January and 1 March 2027

Get this bit right, because most coverage does not. The 5p cut does not simply expire in one lump on 1 January 2027. HMRC's legislated rate table sets 55.95p from 1 January 2027 — a 3p step — and then 57.95p from 1 March 2027, a further 2p. HMRC's wording is: "Fuel Duty rates will then be increased on 1 January 2027 and 1 March 2027 to return them to Fuel Duty levels before March 2022."

57.95p is not an arbitrary number. It is precisely where the rate stood from 23 March 2011 until the 5p cut landed eleven years later, so the March 2027 step restores the pre-March-2022 rate in full rather than raising it.

Pump figures hold the product price constant at this week's average and simply add the duty change plus VAT on it. In practice the oil price will have moved by January, in either direction — but the tax component is the part you can calculate today.

If both steps land, the total move is 5p on duty and 6p at the pump. And from April 2027 the stated policy is that RPI uprating resumes, which would be the first inflation-linked increases in fuel duty since 2011.

Is the January 2027 rise definitely happening?

No. It is legislated, but it is a default, not a settled decision — and HMRC says so in terms. From the same policy paper that sets out the rate table:

"The legislative default will be for rates to return to the levels set at Budget 2025 from 1 January 2027, but the government will confirm final rates at Budget 2026."

Budget 2026 is Wednesday 28 October 2026, delivered by Chancellor John Healey, with a full OBR forecast commissioned for that date. Everything about the 1 January rate therefore turns on one afternoon in October. Plan on the 3p landing, because that is the law as it stands, but do not treat it as certain — and do not treat a cancellation as certain either.

The Treasury has given nothing away. Asked in August 2026 by the Petrol Retailers Association for another extension, it offered only the standard formula that it "keeps fuel duty under review" — reported in the trade press, not published as a Treasury statement, so treat it as a signal rather than a commitment.

Whether the government blinks again, what the OBR does to the numbers, and how the decision sits alongside the rest of the package is the subject of our Autumn Budget 2026 tracker — that page follows the "will they cancel it again?" question, so we will not duplicate it here. This page will be updated on Budget day with the confirmed rates.

Why has fuel duty not risen since 2011?

The last time fuel duty actually went up was 1 January 2011, when it rose 0.76p to 58.95p. Ten weeks later Budget 2011 knocked a penny off, to 57.95p, and there it sat for eleven years until the 5p cut in March 2022. The headline rate has therefore been frozen or cut for 15 years and 5 months. If the 1 January 2027 step lands, it will be the first increase in exactly 16 years — to the day.

Rate history from HMRC's historical hydrocarbon oils duty rates, updated 31 July 2026.

The cut that was meant to last a year

The 5p cut was announced at the Spring Statement on 23 March 2022 and, in the Treasury's own fuel duty factsheet, was to "last for a full 12 months". It has since been extended five times. Two moves matter for where we are now:

• Autumn Budget 2025 (26 November 2025) cancelled the April 2026 RPI uprating but legislated the first increases in 16 years: +1p on 1 September 2026, +2p on 1 December 2026 and +2p on 1 March 2027, with RPI uprating resuming from 2027-28. The OBR certified the cost at £2,370m in 2026-27.
• 20 May 2026 then tore up the first two steps. With pump prices spiking on the war in Iran, then-Chancellor Rachel Reeves extended the full 5p cut from 1 September to 31 December 2026 and added a temporary 3.7p cut to the rebated rate for gas oil, biodiesel and bioblend from 15 June. The instrument is SI 2026/555, made 21 May 2026 and in force 15 June 2026, with the amendments running "until the end of 31st December 2026".

Note the Chancellor has changed since. Andy Burnham became Prime Minister on 20 July 2026 and appointed John Healey as Chancellor. Reeves made the May decision; Healey owns the October one. A good deal of the fuel-duty commentary still circulating online names the wrong person.

What the freeze costs the Exchequer

Fuel duty raised £24 billion in 2025-26 on the OBR's figures — 1.9% of all receipts, 0.8% of national income, and "equivalent to £835 per household". The OBR expects receipts to rise £2.2bn to £26.2bn in 2027-28 "due to the full reversal of the 5p cut and RPI uprating of the duty rate", reach £26.3bn in 2028-29, then fall by around £1bn by 2030-31 as electric vehicles take share.

The OBR does not entirely believe its own forecast. It states that fuel duty receipts between 2027-28 and 2030-31 would be "£3.6 billion lower on average per year than in our central forecast if the Government were to keep duty rates constant at their current level", and that "the possibility that the actual path of fuel duty rates policy will differ from the Government's current stated policy is a risk that we have noted in successive forecasts". Its record of policy measures shows scheduled rises cancelled or deferred at essentially every fiscal event since 2011.

You will see a single cumulative cost for the freeze quoted — £80bn, £120bn, £130bn. The OBR publishes no such aggregate, the circulating figures cover different periods and treat behavioural response differently, and we do not repeat any of them as fact. The certified numbers above are the ones to use.

There is a broader point here about how cash-fixed tax parameters behave. A duty set in pence loses value in real terms every year inflation runs, which quietly cuts the tax without anyone announcing a cut. Freezing income tax thresholds does the opposite: it quietly raises tax without anyone announcing a rise. We track the second effect in the UK fiscal drag tracker; fuel duty is the same mechanism running in reverse.

Who pays what: red diesel, LPG and the rest

Petrol and diesel are the headline, but the same rate table covers rebated and alternative fuels — and one of them takes a much harder hit on 1 January 2027 than road fuel does.

Red diesel takes the sharpest jump

The rebated rate for gas oil used in excepted machines — farming, forestry and the other qualifying uses — fell to 6.48p a litre on 15 June 2026 when the extra 3.7p cut took effect, a level HMRC described as the lowest in over 20 years. On 1 January 2027 the default takes it to 10.76p, then 11.14p on 1 March.

Look at that proportionally. Road fuel duty rises 3p on 52.95p, a 5.7% increase. Red diesel rises 4.28p on 6.48p — roughly two-thirds higher in a single step, and 72% higher by March. If you farm, run plant or heat with rebated fuel, that is the number to budget for, and no consumer coverage is carrying it.

How VAT applies to road fuel

Road fuel is standard-rated: VAT at 20% on the duty-inclusive price, as HMRC's Oils Technical Manual confirms and as the DESNZ weekly dataset records. There is no reduced rate and no relief for private motoring. Worth spelling out because of a change landing this autumn: the zero-rating of VAT on domestic electricity for six months from 1 October 2026 (reverting to 5% in April 2027 unless extended), covered in our energy price cap guide, applies to household electricity only. It does nothing for what you pay at the pump.

What this means for you

Fuel duty is a flat charge per litre, so what you pay depends on one thing: how far you drive and how thirsty your car is. Nothing about your income enters the calculation. A 15,000-mile driver pays more than twice the duty a 7,100-mile driver pays, whether they are a delivery driver or a company director. Relative to earnings that bites hardest on households that have to drive — rural, shift-working, no realistic public transport — which is exactly why a 3p rise is politically difficult in a way that a 3p rise in most taxes would not be.

The reverse is also true, and is the awkward part of the argument for freezing. Because the benefit of a cut scales with fuel bought, the cash gain goes disproportionately to households that own more cars and drive further — generally wealthier ones. Resolution Foundation analysis to that effect is cited in the Commons Library briefing on fuel duty. A fuel duty freeze is a blunt instrument for helping people on low incomes; it is simply a very visible one. If you want to see where fuel sits against the rest of a household budget, our cost of living breakdown puts the numbers side by side.

And an electric car pays none of it. No fuel duty on electricity, and domestic electricity is zero-rated for VAT for six months from 1 October 2026 — reverting to 5% from April 2027 unless the Budget extends it. That is a genuine saving for EV drivers and a growing hole for the Treasury: the OBR already expects fuel duty receipts to fall by around £1bn by 2030-31 as the fleet electrifies. From April 2028, electric and plug-in hybrid cars face electric vehicle excise duty — a per-mile charge recorded by the House of Commons Library at 3p a mile for EVs and 1.5p for plug-in hybrids, rising with CPI from 2029-30 — but the OBR notes it offsets only "around one-quarter of the 0.6 per cent of GDP in revenue set to be lost from fuel duty by 2050".

So the practical position, today: budget for 52.95p a litre now, and for about 6p a litre more by spring 2027 if the law runs its course. Nothing you do changes the rate. What you control is litres — and the £60 per 1,000 litres in the table above is the honest price of the full reversal.

Sources and useful links

• HMRC: Amended Fuel Duty rates: 2026 to 2027 — current rate tables and the "legislative default" wording
• HMRC: Fuel duty rates: 2026 to 2027 — the Autumn Budget 2025 measure, now partly superseded
• SI 2026/555 — the Order extending the cut to 31 December 2026
• HMRC: historical hydrocarbon oils duty rates
• DESNZ: weekly road fuel prices — the pump prices, duty and VAT used in the breakdown
• HMRC: VAT Notice 700 — section 7.7 on VAT charged on excise-duty-inclusive value
• OBR: fuel duties — receipts, forecast and the £3.6bn policy risk
• HM Treasury: Spring Statement 2022 fuel duty factsheet
• GOV.UK: Chancellor protects drivers and businesses from rising fuel costs (20 May 2026)
• DfT: National Travel Survey, vehicle mileage (NTS09)
• House of Commons Library: Fuel duty, developments since 2022 (CBP-10340)
• OBR: Autumn 2026 forecast date announced — Budget confirmed for 28 October 2026