Hong Kong drivers now pay dramatically more per kilometre for petrol than for electricity, even after recent tariff increases. Switching to an EV mainly cuts running costs rather than upfront costs - here is exactly how the numbers stack up.
Key assumptions and today's prices
To keep things concrete, here is a comparison of a typical petrol car with a typical electric car in Hong Kong, using current prices and government efficiency data.
- Petrol (Octane-95): around HKD 31 per litre in mid-March 2026.
- Electricity (residential): about HKD 1.4-1.7 per kWh after 2025 tariff tweaks, depending on provider (CLP vs HK Electric).
- Average petrol car: about 11.6 L/100 km for common 1,501-2,500 cc passenger cars, from EMSD data.
- Typical EV: roughly 0.2 kWh per km (20 kWh/100 km), as cited by the Hong Kong Government for common electric private cars.
These are city-wide averages. Individual models can be far better or worse, but they give a realistic benchmark for cost comparison.
Cost per kilometre: petrol vs EV
Based on these figures, here is the running cost per kilometre under Hong Kong conditions.
Petrol car fuel cost per km
- Consumption: 11.6 L/100 km - 0.116 L per km.
- Price: ~HKD 31 per litre.
- Cost: 0.116 x 31 ≈ HKD 3.60 per km.
Electric car energy cost per km
- Consumption: 0.2 kWh per km.
- Tariff: ~HKD 1.4-1.7 per kWh.
- Cost: 0.2 x 1.4-1.7 ≈ HKD 0.28-0.34 per km.
An EV typically uses under 10% of the per-km fuel cost of a comparable petrol car in Hong Kong.
Typical annual spending
If you drive 10,000 km a year (roughly 27 km per day):
- Petrol: about HKD 36,000 per year in fuel.
- EV: about HKD 2,800-3,400 per year in electricity.
Even with conservative assumptions, the annual saving is easily above HKD 30,000 for that mileage.
These figures cover fuel and energy costs only. Purchase price, insurance, parking, and first registration tax are not included in this comparison.
Side-by-side cost table (Hong Kong)
| Item | Petrol car (HK) | Electric car (HK) |
|---|---|---|
| Energy use | 11.6 L/100 km | 20 kWh/100 km |
| Energy price | HKD 31/L | HKD 1.4-1.7/kWh |
| Cost per km | ≈ HKD 3.60/km | ≈ HKD 0.28-0.34/km |
| Cost per 100 km | ≈ HKD 360 | ≈ HKD 28-34 |
| Annual cost (10,000 km) | ≈ HKD 36,000 | ≈ HKD 2,800-3,400 |
Why Hong Kong magnifies the gap
Hong Kong has some of the world's highest petrol prices, driven by taxes and broader energy policy. By contrast, grid electricity - while not cheap - is tightly regulated and has risen only modestly with recent tariff reviews.
At the same time, modern EVs are far more efficient at converting stored energy into motion than internal-combustion engines, especially in stop-start urban traffic that dominates Hong Kong driving. That means every small increase in petrol price hits running costs hard, while electricity adjustments have a much gentler impact on EV drivers.
~HKD 31/litre
Petrol price (mid-2026)
HKD 1.4-1.7/kWh
Residential electricity tariff
≈ HKD 3.60
Petrol cost per km
≈ HKD 0.28-0.34
EV cost per km
>HKD 30,000
Annual saving at 10,000 km
What this means for buyers
From a pure fuel perspective, choosing an EV in Hong Kong is mainly a question of whether you can access convenient charging and accept the higher upfront vehicle price. If you drive moderate to high mileage and have home or workplace charging, the cumulative fuel savings can offset a significant chunk of that purchase premium over a few years.
Petrol cars still offer faster refuelling and a wider selection of models, which some drivers may value despite the cost penalty per kilometre. But purely on energy costs, Hong Kong is now firmly an EV-friendly market - with electricity running costs that are a fraction of petrol for typical passenger cars.