EV road tax in Singapore

For electric cars, LTA calculates road tax from the motor power rating (PR), defined as maximum power output. For a car with more than one motor, the relevant maximum output is the combined power rating of all motors.

That is why a listing badge in bhp or a battery size in kWh is not a reliable road-tax quote. Ask for the registration details or check the LTA road-tax renewal rate for the specific vehicle.

LTA’s published table combines a six-month road-tax amount with a six-month Additional Flat Component (AFC) of S$350. The road-tax portion is: PR up to 7.5 kW, S$200 × 0.782; above 7.5 to 30 kW, [S$200 + S$2(PR − 7.5)] × 0.782; above 30 to 230 kW, [S$250 + S$3.75(PR − 30)] × 0.782; and above 230 kW, [S$1,525 + S$10(PR − 230)] × 0.782.

The AFC is part of the published EV road-tax structure because EVs do not pay fuel excise duty at a petrol pump. It is not an electricity bill and should not be blended into charging cost.

Road tax, insurance, charging, servicing, tyres, financing and depreciation answer different questions. A dealer’s monthly figure is only useful when it says which of those costs are included and how the number was calculated.

For a comparison, record the renewal period, vehicle PR, quoted annual road tax, charging assumption and COE expiry separately. You can then replace one assumption without rebuilding the whole worksheet.

Power rating matters, not battery size. LTA calculates EV road tax from the motor power rating. For multi-motor cars, the combined rating of all motors is used (LTA OneMotoring tax structure page, checked 2026-08-07). A listing that quotes bhp or battery size instead of the registration-based power rating cannot be turned into a road-tax figure directly.

The S$350 Additional Flat Component exists because EVs pay no fuel excise duty at the pump. It is part of the tax structure, not an electricity charge. It should stay out of any energy-cost comparison.

Work the table yourself. The published schedule is a six-month table with a 0.782 multiplier. Every figure in it is a six-month amount. If a dealer quotes annual road tax, confirm the period and the power rating behind it. Keep road tax, charging, insurance, and depreciation as separate lines.