Estimate the road tax and energy cost for one ordinary private passenger car using verified LTA rules, your vehicle dates, registered specifications, distance, consumption and prices. Petrol, existing diesel, HEV, BEV and separately allocated PHEV use are supported; official and actual amounts remain distinct from calculated estimates.
LTA · OneMotoring · EMA · method v1.0.0 · rules verified 11 Sep 2026
Estimate ordinary private-car road tax and the fuel or charging cost for one vehicle and usage pattern. Or use official and actual amounts without adding them to estimates.
Calculated in your browser. Do not enter a plate number, VIN or address. Values are never sent to analytics or placed in the URL.
The road-tax engine separates regular tax, its age surcharge, the BEV fixed component and diesel special tax. Six-month, annual and complete comparison blocks preserve official component ceilings; only a genuine residual shorter than six months is day-prorated, and results are not official bills. The energy engine uses only the selected unit and partitions PHEV distance first.
Petrol example: 12,000 km/year at 6 L/100 km and S$2.80/L equals 720 L and S$2,016. BEV example: 16 battery kWh/100 km at 90% efficiency with a 50/50 home/public-DC mix produces 2,133.333 grid kWh and about S$1,010.99 before extra fees.
LTA road tax uses registered kW—not battery capacity in kWh or marketing horsepower.
Energy cost is zero, road tax remains payable, and cost per kilometre is unavailable.
Ordinary private passenger cars only. Prices, consumption, access and extra fees are user-confirmed. Results are not an official bill, vehicle-specification catalogue, live quote or vehicle recommendation. Charger installation remains a separate handoff item.
Verified 11 September 2026. The EMA tariff applies to July–September 2026; every price remains editable.
Each result stays connected to the inputs and rules used.
Applied parameters include a source and verification date.
User inputs and defaults are clearly separated.
Scope and exclusions appear beside the result.
Connect purchase cash, flat-rate financing, running costs and household headroom across 5, 7 and 10 years.
Separate cash flow, economic cost and opportunity value for a new, used PARF or COE-renewed car.
Compare two or three offers by cash needed, monthly burden, fees, total borrowing cost and derived EIR.
interest.sg provides general information, dated reference data and calculation tools. Results are estimates—not financial, investment, legal, tax, property, valuation, CPF, HDB, lending, insurance or protection advice. Verify material decisions with the relevant authority or a qualified professional.
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