Cat A vs Cat B: Is the Upgrade Worth the Premium?

A Gap That Has Almost Vanished

For most of the COE system's history, Category B premiums have commanded a substantial premium over Category A. The logic was straightforward: Cat B gives you access to larger, more powerful vehicles—luxury sedans, performance cars, big SUVs—and that privilege cost extra. Premiums of $30,000 to $60,000 above Cat A were common.

Then came March 2026, second bidding: Cat A closed at $111,890 and Cat B at $115,568. The gap? Just $3,678. In February 2026, the gap inverted entirely—Cat A actually exceeded Cat B for the first time in memory. Something fundamental has shifted, and every prospective car buyer needs to understand what is happening.

What the Categories Actually Mean

Before diving into the convergence, a quick refresher. LTA classifies vehicles into COE categories based on these thresholds:

• Category A: Cars with engine capacity of 1,600cc or below, or power output of 97kW (130bhp) or below
• Category B: Cars with engine capacity above 1,600cc, or power output above 97kW (130bhp)
• Category C: Goods vehicles and buses — $78,000 in March 2026
• Category D: Motorcycles — $9,589 in March 2026
• Category E (Open): Can be used for any vehicle type — $118,119 in March 2026

The Cat A threshold was designed decades ago when engine displacement was a reasonable proxy for vehicle size and cost. A 1.6-litre car was a modest family sedan. Anything bigger was a luxury. That assumption has been dismantled by two forces: electric vehicles and manufacturer power-tuning strategies.

The EV Effect: Cat A Under Siege

Electric vehicles have flooded Category A. As of early 2026, EVs account for 45.6% of all new Cat A registrations and 40.2% of all new car registrations overall. Popular models like the BYD Atto 3, MG4, and Tesla Model 3 Standard Range all fall within the Cat A power threshold.

This matters because EVs have attracted buyers who would previously have shopped in Cat B. A driver who might have bought a Toyota Camry, Honda Accord, or even a BMW 3 Series is now seriously considering a Cat A electric crossover. The BYD Atto 3, for instance, offers more interior space than many Cat B sedans, acceleration that rivals cars with twice the horsepower rating, and running costs that are a fraction of any ICE vehicle.

The result is a dramatic expansion of the Cat A buyer pool. More bidders competing for Cat A certificates drives premiums up, while Cat B demand softens as buyers defect to electric alternatives. The gap narrows from both directions.

Manufacturer Power-Tuning: Gaming the System

Car manufacturers are not passive observers of the COE system. They actively engineer their vehicles to fall on the right side of category thresholds. This practice, known as power-tuning or spec-tuning, has become increasingly sophisticated.

A manufacturer might take a vehicle that naturally produces 140bhp and detune it to 128bhp—just below the Cat A ceiling of 130bhp. The car retains most of its performance characteristics but qualifies for Cat A, saving buyers thousands of dollars in COE premiums when the gap was wide, and giving them access to a larger quota pool.

This strategy has accelerated in recent years. Models that were traditionally Cat B are appearing in Cat A variants. The Mazda 3, certain Honda Civic trims, and several Hyundai models have been tuned to fit Cat A. From the manufacturer's perspective, it is a pure competitive advantage: same car, lower total price for the buyer.

The cumulative effect is that Cat A now contains vehicles that are, in practical terms, just as capable as many Cat B offerings. The category boundary has become increasingly artificial.

Historical Context: How the Gap Has Moved

To appreciate how unusual the current situation is, consider the historical spread between Cat A and Cat B premiums. You can explore the full dataset on our trends page.

In the early 2010s, the gap fluctuated between $10,000 and $30,000. During the COE surge of 2023–2024, it widened dramatically as Cat B pushed toward $170,000 while Cat A lagged at $100,000–$120,000. The $50,000+ gap at that time made Cat B a genuinely expensive proposition and pushed many buyers toward Cat A alternatives.

Starting in late 2024, the gap began compressing. Cat A premiums climbed steadily on the back of EV demand and power-tuning, while Cat B premiums plateaued or dipped slightly. By mid-2025, the gap was under $20,000. By early 2026, it was effectively zero—and for one round, negative.

The LTA Category Review

In March 2026, the Land Transport Authority announced a review of the COE category structure. While details remain sparse, the review is widely expected to address the EV classification issue. The current power-based threshold was designed for internal combustion engines, and it does not translate neatly to electric motors.

Possible outcomes of the review include:

• Raising the Cat A power threshold to accommodate more EVs and reflect modern vehicle capabilities, which would expand Cat A further
• Creating a new EV-specific category with its own quota, removing EVs from direct competition with ICE vehicles in Cat A
• Switching to a price-based classification (e.g., OMV thresholds) rather than engine specs, which would better separate economy and premium vehicles
• Merging Cat A and Cat B entirely into a single car category, given that the current split has become almost meaningless

Any of these changes would reshape the market. If you are buying a car in the next 12–18 months, you should factor in the possibility of structural reform. Check the LTA website for updates on the review timeline.

When Cat B Still Makes Sense

Even with the gap at historic lows, there are legitimate reasons to opt for a Cat B vehicle:

• Family transport needs: Large 7-seater MPVs and SUVs—the Toyota Alphard, Hyundai Staria, Honda Odyssey—are only available in Cat B configurations. If you need the space, you need the category.
• Towing and cargo capacity: Certain commercial-adjacent use cases require the engine capacity and torque of a Cat B vehicle.
• Driving experience: If you are a genuine driving enthusiast who values the refinement of a BMW 5 Series, the comfort of a Mercedes E-Class, or the engagement of a sports car, the Cat B experience is materially different from Cat A. At a gap of under $4,000, the COE price argument against Cat B has evaporated.
• Resale considerations: Certain Cat B models—particularly from Porsche, Lexus, and some Mercedes variants—hold residual value better than equivalent-price Cat A vehicles. Over a 10-year ownership cycle, this can partly offset the higher purchase price.

When to Stay in Cat A

Cat A remains the right choice for many buyers, even as the gap narrows:

• EV buyers: The most compelling electric vehicles for average consumers—BYD Atto 3, MG4, Tesla Model 3 Standard Range—are in Cat A. Their running costs (approximately $0.03/km for electricity versus $0.12/km for petrol) deliver savings of roughly $1,350 per year at 15,000 km, compounding over the ownership period.
• Budget-conscious buyers: Cat A vehicles generally have lower OMVs, which translates to lower ARF, lower insurance premiums, and lower depreciation. The total cost of ownership is lower even when the COE premium is similar.
• Urban commuters: On Singapore roads with speed limits of 50–90 km/h and average traffic speeds often below 30 km/h, the additional power of a Cat B vehicle delivers negligible practical benefit. A Cat A sedan or EV handles 95% of Singapore driving scenarios perfectly well.
• Lower running costs: Insurance for a Cat A vehicle runs $700–$1,800 per year, compared to $2,500+ for continental Cat B brands. Maintenance follows a similar pattern. These differences compound meaningfully over a decade.

The Investment Angle

Even with the COE gap now minimal, the total price gap between a Cat A and Cat B car remains significant because of the vehicle price difference. A Cat A Toyota Corolla Altis costs roughly $162,888 on-road. A Cat B BMW 3 Series or Mercedes C-Class might run $250,000–$300,000. That $90,000–$140,000 difference, if invested at a conservative 5% annual return over 10 years, would grow to $147,000–$228,000.

Framed this way, the question is not whether you can afford a Cat B car, but whether driving one is worth $147,000–$228,000 in opportunity cost. For some, absolutely. For others, the Cat A vehicle plus a healthier retirement fund is the better bargain.

What Happens Next

The near-total convergence of Cat A and Cat B premiums is likely a structural shift, not a temporary anomaly. As EV adoption continues to climb and manufacturers keep tuning vehicles into Cat A, the demand dynamics that created the traditional gap are unlikely to return.

The LTA category review could reset the playing field entirely. Until then, prospective buyers are in an unusual position: the COE premium difference between a compact sedan and a luxury car is almost negligible. The decision comes down to the car itself—its price, its running costs, its suitability for your life—rather than the certificate that lets you drive it.

Use our Total Cost Calculator to compare the full ownership cost of your Cat A and Cat B shortlist, and track the latest premiums on our COE results page. Set up a price alert for your target category so you can bid at the right moment.