How is road tax calculated in Singapore?
For a petrol or petrol-hybrid car, road tax is based on engine capacity (cc). LTA applies a 6-monthly formula by capacity band, multiplied by a factor of 0.782. The bigger the engine, the higher the rate within each band:
| Engine capacity (cc) | 6-monthly road tax formula |
|---|---|
| Up to 600 | $200 × 0.782 |
| 601–1,000 | [$200 + $0.125 × (cc − 600)] × 0.782 |
| 1,001–1,600 | [$250 + $0.375 × (cc − 1,000)] × 0.782 |
| 1,601–3,000 | [$475 + $0.75 × (cc − 1,600)] × 0.782 |
| Above 3,000 | [$1,525 + $1 × (cc − 3,000)] × 0.782 |
Your annual road tax is simply the 6-monthly amount × 2.
Why is EV road tax higher?
Fully electric cars are taxed on their motor power rating (kW) using a similar banded formula, plus an Additional Flat Component (AFC) of $700 a year($350 per 6 months, in place since 1 January 2023). The AFC exists because EV drivers don't pay fuel duty at the pump the way petrol drivers do — so a mid-power EV often lands above a comparable petrol car once the flat component is added.
Do older cars pay more road tax?
Yes. Cars more than 10 years old pay a surcharge on top of their road tax: +10% over 10 years, rising by 10 percentage points each year to +50%for cars over 14 years old. Add your vehicle's age above to include it.
Is road tax paid every 6 or 12 months?
You can renew for either 6 or 12 months. The calculator shows both so you can choose.
How do I check my exact road tax and expiry?
Check your renewal amount and expiry date on LTA's One Motoring portal using your vehicle number. This calculator is an estimate to plan ahead — always confirm the exact figure with LTA before paying.