EV Charging Cost Calculator
Calculate your electric vehicle charging costs across the UK
Home Charging Cost Calculator
Calculate the cost to charge your EV at home using standard or off-peak tariff rates.
Charging Cost
Public Charging Cost Calculator
Estimate the cost of charging at public charging stations across the UK.
Charging Cost
EV vs Petrol Cost Comparison
Compare the running costs of your EV against a petrol vehicle.
Electric Vehicle
Petrol Vehicle
Your Savings
Annual Charging Cost Calculator
Estimate your yearly EV charging expenses based on your driving patterns.
Total Annual Charging Cost
How to Use This Calculator
Select the appropriate tab based on your charging scenario. Enter your vehicle’s battery capacity and desired charge levels. The calculator automatically accounts for charging efficiency losses and provides accurate cost estimates based on current UK electricity rates.
For home charging, choose between standard rates or off-peak EV tariffs which can save you up to 70% on charging costs. Public charging costs vary significantly depending on charger speed and location.
Charging Rate Breakdown
| Charging Location | Power Output | Typical Cost (p/kWh) | Time for 80% Charge (60 kWh battery) |
|---|---|---|---|
| Home (Off-Peak Tariff) | 7 kW | 7.0p | 6-8 hours |
| Home (Standard Rate) | 7 kW | 25.73p | 6-8 hours |
| Workplace Charger | 7-22 kW | Free-15p | 2-8 hours |
| Public Slow Charger | 3-7 kW | 25-30p | 6-12 hours |
| Public Fast Charger | 7-22 kW | 35-45p | 2-6 hours |
| Rapid Charger | 50 kW | 60-70p | 40-60 minutes |
| Ultra-Rapid Charger | 150+ kW | 75-85p | 20-30 minutes |
Tariff Selection Guide
Choosing the right electricity tariff can dramatically reduce your EV charging costs. Off-peak EV tariffs typically offer rates between 6.5p-9p per kWh during overnight hours (usually midnight to 5am or 6am), compared to standard rates of around 25-27p per kWh.
Popular UK EV tariffs include Octopus Intelligent Go, EDF GoElectric, British Gas Electric Driver, and E.ON Next Drive. These tariffs require a smart metre and often integrate with home charging units to automatically charge during the cheapest hours.
Cost Calculation Methodology
The calculator uses the formula: Cost = (Battery Capacity × Charge Percentage Difference ÷ Charging Efficiency) × Electricity Rate. Charging efficiency typically ranges from 85-95%, with an average of 90% used in calculations to account for energy losses during the AC-to-DC conversion process.
For public charging, costs are calculated based on network pricing which varies by provider and location. Motorway rapid chargers are typically the most expensive due to their convenient location and fast charging speeds.
Factors Affecting Charging Costs
Several variables influence your actual charging expenses:
Temperature: Cold weather reduces battery efficiency and increases charging time and cost by 10-30%.
Battery Degradation: Over time, batteries lose capacity, though most manufacturers warranty 70-80% capacity after 8 years.
Charging Speed: Faster charging (above 50 kW) generates more heat and can be slightly less efficient than slower AC charging.
Time of Use: With EV tariffs, charging during peak hours can cost 3-4 times more than off-peak periods.
Popular EV Models Costs
| Vehicle Model | Battery Size | Range (WLTP) | Cost per Full Charge (Off-Peak) | Cost per Full Charge (Standard) |
|---|---|---|---|---|
| Nissan Leaf | 40 kWh | 168 miles | £3.11 | £11.44 |
| Tesla Model 3 RWD | 60 kWh | 305 miles | £4.67 | £17.16 |
| Kia e-Niro | 64 kWh | 282 miles | £4.98 | £18.30 |
| MG ZS EV | 51 kWh | 198 miles | £3.97 | £14.59 |
| Hyundai Kona Electric | 65 kWh | 300 miles | £5.06 | £18.59 |
| Volkswagen ID.3 | 58 kWh | 265 miles | £4.51 | £16.59 |
Frequently Asked Questions
How much does it cost to fully charge an electric car in the UK?
A full charge costs between £3-£18 depending on battery size and tariff. Using an off-peak EV tariff at 7p/kWh, a 60 kWh battery costs approximately £4.67 for a complete charge. With standard rates at 25.73p/kWh, the same charge would cost around £17.16.
Is it cheaper to charge an EV at home or at public stations?
Home charging with an off-peak tariff is significantly cheaper, costing 7-9p per kWh compared to 35-85p per kWh at public chargers. Annual savings can exceed £1,000 for drivers who primarily charge at home versus using public rapid chargers.
What percentage should I charge my EV battery to?
Most manufacturers recommend charging to 80% for daily use to optimise battery longevity. Only charge to 100% when needed for longer journeys. Similarly, avoid letting the battery drop below 20% regularly.
Do I need a special electricity tariff for EV charging?
Whilst not required, EV-specific tariffs offer substantial savings. They provide off-peak rates (typically 6.5-9p/kWh) during overnight hours compared to standard rates (25-27p/kWh). A smart metre is usually required to access these tariffs.
How long does it take to charge an electric car at home?
With a standard 7 kW home charger, expect 6-8 hours for a full charge on most EVs. A 22 kW charger (if your vehicle supports it) can reduce this to 2-4 hours. Charging from 20% to 80% typically takes 3-5 hours with a 7 kW charger.
Are there any additional costs beyond electricity?
Yes, consider the installation cost of a home charger (£500-£1,500, though grants may be available), potential subscription fees for public charging networks (typically £2-£8 monthly for discounted rates), and slightly higher insurance premiums for EVs.
How does EV charging cost compare to petrol?
EVs are substantially cheaper to run. At 7p/kWh off-peak charging and 3.5 miles/kWh efficiency, you’ll pay 2p per mile. A petrol car achieving 45 MPG at £1.45/litre costs approximately 14.5p per mile – over 7 times more expensive.
What affects my EV’s charging efficiency?
Charging efficiency is impacted by ambient temperature (cold weather reduces efficiency), battery state of health, charging speed (slower is more efficient), and the vehicle’s battery management system. Modern EVs typically achieve 85-95% efficiency.
Regional Variations
Electricity prices vary slightly across UK regions due to distribution network operator (DNO) charges. London typically has the highest rates, whilst Scotland and the North often enjoy slightly lower prices. The difference is usually 1-3p per kWh. Additionally, Scotland has a higher concentration of renewable energy and may offer more competitive green tariffs.
Government Support Schemes
The UK government offers the EV Chargepoint Grant providing up to £350 towards installing a home charger for flat residents and people living in rental accommodation. Businesses can access the Workplace Charging Scheme offering up to £14,000 for installing charging points. These grants reduce the upfront cost barrier to EV ownership.
Future Cost Projections
Electricity prices are expected to stabilise over the next few years as renewable energy capacity increases. The government’s commitment to net-zero by 2050 includes substantial investment in green energy infrastructure. Conversely, petrol prices are likely to remain volatile due to geopolitical factors and eventual scarcity as vehicles transition to electric power.
References
- Ofgem – Energy Price Cap, quarterly electricity and gas price limits for England, Scotland, and Wales (2025)
- Department for Energy Security and Net Zero – Quarterly Energy Prices, UK electricity pricing statistics (September 2025)
- Society of Motor Manufacturers and Traders (SMMT) – UK Electric Vehicle Registration Data (2025)
- Office for Zero Emission Vehicles (OZEV) – Government EV Chargepoint Grant Guidance (2025)
- UK Power Networks – Distribution Use of System Charges, regional electricity pricing structures (2025)
- Zap-Map – UK Public Charging Network Pricing Survey (2025)