Glossary

GL4 • Ownership costs

Road Tax (Singapore): include it in total cost, not just instalments

Road tax is a recurring cost of owning and using a car in Singapore. If you compare auto financing offers only by monthly instalment, you can miss meaningful differences in annual running costs. This page gives a stable definition and points to LTA's official information and calculators.

DefinitionWhy it mattersHow it's calculatedMisconceptionsAuthority sourcesRelated

One-line definition

Road tax: a recurring fee payable for using a vehicle on Singapore roads, forming part of the annual ownership cost.

When you compare "best auto financing options in Singapore", road tax belongs in the same total-cost view as insurance, maintenance, parking, and (if applicable) COE renewal assumptions.

Why it matters for auto financing comparisons

  • Budget reality: even with the same instalment, different vehicles can have different annual road tax, changing your monthly budget.
  • Affordability perception: recurring costs affect how "affordable" a car feels and can influence your downpayment/tenure choice.
  • Fair comparisons: total cost of ownership should include recurring costs, not just loan terms.
Practical tip: convert road tax into a monthly equivalent (annual / 12) when comparing two financing scenarios.

How road tax is generally calculated (high-level)

What it depends on

  • Vehicle type/category.
  • Relevant vehicle parameters used in the official scheme (varies by category).
  • Any applicable adjustments or concessions under the official rules.

How to avoid wrong assumptions

  • Use the official LTA/OneMotoring calculator for the specific vehicle category.
  • Record the exact parameter used (so you compare apples-to-apples).
  • Keep ownership horizon consistent (e.g., 3 years vs 7 years).
Want a worked "total cost" comparison? See Terms & Calc and Tools.

Common misconceptions

  • "Road tax is tiny so it doesn't matter." → Over a multi-year horizon, recurring costs add up and can change a comparison.
  • "Road tax is the same for all cars." → It varies by category and vehicle parameters; verify for the specific car.
  • "My financing covers road tax." → Financing covers purchase; road tax is a recurring government fee.
For more "what people get wrong" pages, see Pitfalls.

Authority sources (recommended citations)

Editorial rule: when you mention a specific rate or formula, cite the exact LTA page (and ideally link the calculator).

FAQ

How do I include road tax in a financing comparison?

Estimate annual road tax using the official calculator, then add it to total cost of ownership (or convert to monthly equivalent) before comparing scenarios.

Where do I find the official calculator?

Use the LTA OneMotoring road tax calculator linked in "Authority sources".

Does road tax depend on COE?

They are separate: COE relates to entitlement to own/use a car; road tax is a recurring fee. For COE/PQP, see COE & PQP.