⛽ UK Petrol Cost Calculator

📍 UK Fuel Prices by Region (October 2025)

: petrol and diesel:

Source: RAC Fuel Watch, October 2025. Prices vary by location and forecourt.

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Compare typical running costs based on 10,000 miles/year at current average UK prices.

Key Differences

• Petrol: Lower upfront cost, familiar refueling, wider range of models. Higher running cost.
• Diesel: Better motorway fuel economy (+20 - 30% vs petrol). Higher upfront cost. Clean Air Zone charges in some UK cities. Historically higher maintenance.
• EV: Lowest running cost (up to 80% cheaper per mile). Zero road tax (EVs, current rules). Higher upfront purchase price. Public charging can be 3 - 5× home rate. Range varies by model (real-world 150 - 350 miles).

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• Drive smoothly: Avoid harsh acceleration and heavy braking. Anticipate traffic flow.
• Check tyre pressure::
• Reduce weight: Remove roof racks, roof boxes, and unnecessary boot items when not in use.
• Use cruise control: On motorways, cruise control maintains steady speed and improves MPG by up to 10%.
• Turn off AC / use eco mode: Air conditioning increases fuel consumption by 5 - 15%. Use eco/climate modes on motorways.
• Avoid short trips: A cold engine uses 50% more fuel for the first 5 miles. Combine errands into one journey.
• Shift up early: For manuals, change gear at ~2,500 rpm (petrol) or ~2,000 rpm (diesel). Lower revs = less fuel.
• Use supermarket fuel: Supermarket petrol/diesel is often 3 - 5p/L cheaper than branded forecourts with no noticeable difference in quality.
• Plan your route: Avoid congestion. Use real-time traffic apps to avoid jams and roadworks.
• Pump at the right time::
• For EV drivers: Pre-condition your battery while plugged in. Use regenerative braking. Charge at home off-peak (7-8p/kWh on some tariffs).

📋 UK Fuel Tax Explained

The UK has one of the highest fuel tax rates in Europe. Here is how the pump price breaks down:

• Fuel Duty: A flat rate of 52.95 pence per litre on petrol and diesel. This applies regardless of the wholesale price. The duty rate has been frozen since 2011.
• VAT (Value Added Tax): 20% charged on the total of (product cost + fuel duty). This means you pay VAT on the tax itself:
• Total Tax: For petrol at £1.45/L, tax (duty + VAT on duty + VAT on product) accounts for roughly 60% of the pump price. Only ~40p of every £1 pays for the actual fuel.
• Environmental levy: No separate carbon tax on road fuel, but duty rates implicitly reflect environmental policy.
• EV electricity: Electricity for home charging is subject to 20% VAT (reduced 5% rate was removed in 2022). Public charge points still charge 20% VAT. There is currently no fuel duty equivalent on electricity for road use.