What the data shows
Singapore’s grid emission factor of 0.408 kg CO₂e per kWh, published by the Energy Market Authority in the Singapore Energy Statistics 2023, is higher than grids in countries with significant renewable capacity, but lower than several Asian peers. At this factor, charging an EV produces measurably fewer emissions per kilometre than burning petrol — and that advantage will grow as Singapore’s grid decarbonises under the Green Plan 2030.
The Land Transport Authority applies an official emission factor of 0.4 g CO₂ per Wh (equivalent to 0.4 kg CO₂ per kWh) for registered EVs and plug-in hybrids under the Vehicular Emissions Scheme, applicable through 31 December 2027. This is the basis on which Singapore’s vehicle emission incentives and surcharges are calculated, and it closely matches the EMA grid average.
6.0 kg CO₂ per 100 km for an EV vs 17.4 kg for a petrol car
Based on Singapore’s grid emission factor of 0.408 kg CO₂e/kWh (EMA, 2023). Source: Budget Direct Singapore / LTA methodology, 2025.
In the first quarter of 2025, electric vehicles accounted for 40.2% of all new car registrations in Singapore, according to LTA — up from 18% in 2023. The rapid adoption rate reflects a combination of government incentives, narrowing upfront cost gaps, and growing charging infrastructure across HDB carparks, condominiums, and public locations.
How much CO₂e does switching actually save in Singapore?
For a Singapore driver covering approximately 15,000 km per year, the estimated operational emission difference between a petrol car and an EV is around 1.0–1.7 tons CO₂e annually, depending on the specific vehicles compared. This uses the EMA 2023 grid factor and LTA’s vehicle emission methodology. Singapore’s average personal carbon footprint is approximately 7.5 tons CO₂e per year according to NEA (2023), making transport one of the higher-impact categories available for individual action.
| Vehicle type | Operational CO₂ (kg/100 km) | Est. annual tons CO₂e (15,000 km) |
|---|---|---|
| Petrol car (avg Singapore) | ~17.4 | ~2.6 |
| EV on Singapore grid (EMA 2023) | ~6.0 | ~0.9 |
| Saving per year (est.) | ~11.4 | ~1.7 |
Sources: EMA Singapore Energy Statistics 2023; LTA Vehicular Emissions Scheme; Budget Direct Singapore analysis, 2025. Figures are operational estimates only — manufacturing emissions not included.
The Singapore context: what makes EVs different here
Several factors make the EV calculation in Singapore distinct from other markets. First, Singapore’s COE (Certificate of Entitlement) system means car ownership already carries a significant upfront cost, compressing the relative price difference between EVs and petrol cars compared to markets without purchase restrictions. Second, the short driving distances typical of Singapore — the island is approximately 50 km across — mean range anxiety is largely a non-issue for most personal vehicle use. Third, EV charging infrastructure has expanded significantly, with LTA reporting charging points installed across the majority of HDB carparks as of early 2025.
Current incentives (2026)
According to LTA, the EV Early Adoption Incentive (EEAI) offers a rebate of 45% off the Additional Registration Fee (ARF), capped at $7,500, for electric cars and taxis registered in 2026. The scheme ends on 31 December 2026. Combined with VES Band A1 rebates, total cost savings of up to $30,000 off the ARF are available for EVs registered in 2026. These incentives will not be renewed from 2027 as adoption rates increase and the cost gap narrows.
Singapore’s grid is expected to decarbonise progressively under the Green Plan 2030. As the share of natural gas and renewable imports increases, the emission factor per kWh will fall — improving the relative position of EVs over the remaining lifetime of vehicles registered today. LTA’s goal is 100% cleaner energy vehicles by 2040, meaning the infrastructure and policy environment will continue to favour EV ownership through this decade.
How to evaluate whether an EV is right for you in Singapore
Estimate your current transport emissions. The Decarb calculator covers personal vehicle mileage in kilometres with Singapore-specific emission factors, giving you an annual figure in tons CO₂e to compare against an EV scenario.
Check your charging situation before buying. HDB residents should confirm charging availability at their specific carpark. Condo residents can apply for the EV Common Charger Grant (ECCG), which co-funds 50% of smart charger installation costs, extended by LTA until 31 December 2026.
Act before end 2026 if you are considering it. The EEAI ends on 31 December 2026 and will not be renewed. Drivers who register an EV in 2026 receive the last tranche of ARF rebates available under the current incentive framework.
Consider the full footprint picture. For many Singapore residents, flights are a larger emission category than personal transport. The Decarb calculator ranks actions across all categories — transport, flights, home energy, diet, and finances — so switching to an EV is placed in context against other available reductions.
Methodology note
Operational emission figures use the EMA Singapore Energy Statistics 2023 grid factor of 0.408 kg CO₂e per kWh and LTA’s official VES emission factor of 0.4 kg CO₂ per kWh for registered EVs. Petrol figures are based on LTA emission methodology as reported in Budget Direct Singapore’s 2025 cost-effectiveness analysis. Annual figures assume 15,000 km driven per year, consistent with typical Singapore private car usage. All figures are operational estimates — manufacturing and end-of-life emissions are not included. Full methodology at decarb.co/methodology.
Frequently asked questions
How much CO₂ does an EV emit per km in Singapore?
Using Singapore’s EMA 2023 grid emission factor of 0.408 kg CO₂e per kWh, a typical EV emits approximately 6.0 kg CO₂ per 100 km, compared to approximately 17.4 kg per 100 km for a petrol car. This is based on LTA’s Vehicular Emissions Scheme methodology, which applies an official emission factor of 0.4 g CO₂ per Wh for EV charging in Singapore.
Is it worth buying an EV in Singapore before the EEAI ends?
According to LTA, the EV Early Adoption Incentive (EEAI) provides a rebate of 45% off the Additional Registration Fee, capped at $7,500, for electric cars registered in 2026. The scheme ends on 31 December 2026 and will not be renewed. Combined with VES Band A1 rebates, total ARF savings of up to $30,000 are available in 2026. From an emission standpoint, switching at any point saves approximately 1.0–1.7 tons CO₂e per year over a petrol alternative.
Does Singapore’s grid make EVs less green than in other countries?
Singapore’s grid emission factor of 0.408 kg CO₂e per kWh (EMA, 2023) is higher than grids with significant renewable capacity — such as Norway or parts of the US — but an EV in Singapore still produces roughly 50% fewer operational emissions per kilometre than a petrol car. As Singapore’s grid decarbonises under the Green Plan 2030, this advantage will increase over the lifetime of vehicles registered today.
Can HDB residents charge an EV at home in Singapore?
According to LTA, EV charging points have been installed across the majority of HDB carparks as of early 2025, with rollout continuing. The target is for every HDB town to be EV-ready. HDB residents cannot install private home chargers as they do not own the carpark infrastructure, but public HDB chargers are increasingly available at overnight rates suitable for regular charging.
How does switching to an EV compare to other carbon reductions in Singapore?
Switching from a petrol car to an EV saves an estimated 1.0–1.7 tons CO₂e per year for a typical Singapore driver. For context, the average Singapore personal footprint is approximately 7.5 tons CO₂e per year (NEA, 2023). Long-haul flights are often a larger single emission source for Singapore residents — one return flight to Europe produces approximately 1.5–2.5 tons CO₂e. The Decarb calculator ranks all actions across categories so transport savings can be compared against other available reductions.
Your carbon footprint
See how transport ranks in your Singapore footprint
The Decarb calculator uses Singapore-specific data — EMA grid factors, NEA benchmarks, LTA transport figures, SGD throughout. Takes 3 minutes. Free.
Calculate your footprintSources
- Energy Market Authority (EMA), Singapore Energy Statistics 2023 — grid emission factor 0.408 kg CO₂e/kWh
- Land Transport Authority (LTA), Vehicular Emissions Scheme — official EV emission factor 0.4 g CO₂/Wh, applicable through 31 December 2027
- LTA, Extension of VES and EEAI news release, September 2025 — EEAI cap $7,500 for 2026 registrations
- LTA, Strengthening Singapore’s EV Ecosystem news release, March 2025 — EV share of new car registrations Q1 2025
- National Environment Agency (NEA), Singapore Green Plan 2030 — national average footprint 7.5 t CO₂e/year
- Budget Direct Singapore, Cost-Effectiveness of Electric Cars in Singapore, 2025 — operational emission comparison using EMA grid factor