Category E: Why the Open Category Always Costs More

What Is Category E?

If you have spent any time tracking COE prices, you will have noticed that one category almost always comes out on top: Category E, the Open Category. In the March 2026 bidding exercises, Cat E closed at $118,119 — higher than Cat A ($111,890), Cat B ($115,568), Cat C ($78,000), and Cat D ($9,589). This is not a fluke. It is the structural norm, and understanding why requires a closer look at how the COE system allocates certificates and how different buyer groups compete for them.

Unlike Categories A through D, which restrict you to specific vehicle types, a Category E COE can be used to register any vehicle: a small car, a large car, a motorcycle, a goods vehicle, or even a bus. That universal applicability is the foundation of everything that follows. If you are new to the COE system entirely, our complete COE guide covers the basics before you dive into Category E specifics.

How Category E Quotas Are Determined

The quota mechanics behind Category E are unlike any other category, and they are central to understanding its persistent premium. Since May 2017, Category E receives 10% of the deregistrations from Categories A, B, and C. This replaced the earlier system where Cat E drew from all categories including Cat D (motorcycles). The change removed motorcycle deregistrations from the Cat E quota pool, effectively shrinking the supply.

To put this in concrete terms: if 5,000 Cat A vehicles, 3,000 Cat B vehicles, and 1,000 Cat C vehicles are deregistered in a quarter, Category E receives 10% of that total — 900 certificates. Those 900 certificates are then divided across the bidding exercises for the quarter, typically yielding around 150 certificates per exercise.

Compare that to Category A, which might have 800-1,200 certificates available in a single exercise, or Category B with 400-700. Category E is structurally the smallest car-eligible category by quota, and smaller supply with robust demand is the textbook recipe for higher prices. You can track the current quota allocations on our Quota Watch page.

Who Bids for Category E?

The demand side of Category E is surprisingly diverse. Multiple buyer groups converge on this single category, each with different motivations:

Luxury and Large Car Dealers

This is the largest group. When Category B supply is tight or premiums are rising fast, dealers who need to deliver Mercedes S-Classes, BMW 7 Series, or Porsche Cayennes will bid in Category E as overflow. For a customer spending $300,000 or more on a car, the $2,000-$5,000 Cat E premium over Cat B is negligible. Dealers treat Cat E as insurance — if they fail to secure a Cat B certificate, the Cat E bid serves as a backup.

Taxi and Private-Hire Operators

Since August 2012, taxi COEs have been drawn from Category E rather than having a separate allocation. This means companies like ComfortDelGro compete directly against private car buyers for the same limited pool of Cat E certificates. While the private-hire vehicle (PHV) fleet has stabilised in recent years, this structural demand floor keeps Cat E prices supported even when private demand softens.

Fleet Operators With Mixed Needs

Companies that operate both passenger vehicles and goods vehicles sometimes prefer Cat E for its flexibility. A logistics company might register a van under Cat E today and, if business needs change, transfer that COE to a different vehicle type. This operational flexibility justifies the premium for commercial buyers who cannot predict their exact fleet composition years in advance.

Strategic Individual Buyers

A smaller but growing group of individual buyers bids in Cat E when the premium over their target category is narrow. In February 2026, for instance, Cat A closed at $106,501 and Cat B at $105,001 — both within striking distance of Cat E. When the gap narrows to under $5,000, some buyers reason that Cat E's flexibility is worth the small additional cost.

Cat A Overflow Bidders

This is a relatively new phenomenon driven by the EV boom. With 45.6% of Cat A registrations now being electric vehicles (January-September 2025 data), competition in Cat A has intensified dramatically. When Cat A premiums approach or exceed Cat B — as happened in February 2026 when Cat A ($106,501) actually surpassed Cat B ($105,001) for the first time — some Cat A bidders switch to Cat E. They pay a modest premium but avoid the fiercest competition.

The Option Value Concept

Economists describe the Cat E premium through the concept of option value. A Category A certificate gives you exactly one right: to register a car with engine power not exceeding 130 bhp (or an EV equivalent). A Category E certificate gives you the right to register any vehicle of any type. Even if you never exercise that broader right, having it is worth something.

Think of it like airline tickets. A flexible ticket that allows free changes and cancellations costs more than a non-refundable fare, even if you end up flying on the original date. The flexibility itself has a price because it protects you against uncertainty. With a Cat E COE, you are protected against the uncertainty of needing a different vehicle type during the 10-year certificate validity period.

This option value is not purely theoretical. Consider a family that buys a small Cat A car in 2026. Five years later, their needs change — they want a larger SUV that falls under Cat B. With a Cat A certificate, they cannot simply switch. They must deregister, forfeit the remaining COE value (or receive a partial rebate), and bid for a new Cat B certificate at whatever the market price is in 2031. With a Cat E certificate, the vehicle swap is straightforward because the certificate is not category-restricted.

Historical Premium Analysis

The Cat E premium over Cat B has varied significantly over time, but it has been positive in roughly 85% of all bidding exercises since 2002. Looking at the data on our historical trends page:

• Normal conditions (2015-2019): Cat E traded $1,000-$5,000 above Cat B, a premium of 3-8%
• COVID recovery (2021-2022): The premium widened to $5,000-$15,000 as fleet operators scrambled for certificates
• Peak market (late 2023): Cat E hit its all-time high of $152,000 in October 2023, with the Cat B premium narrowing to under $2,000 as both categories pushed against the ceiling
• Current market (Q1 2026): Cat E at $118,119 versus Cat B at $115,568 — a spread of $2,551 or 2.2%

The pattern is consistent: Cat E almost always costs more, but the size of the premium fluctuates with market conditions. During periods of extreme demand, premiums compress because Cat B itself is already at very high levels. During moderate markets, the percentage premium tends to be larger because Cat E's structural advantages are more visible against a lower base price.

The 10% Redistribution Rule in Practice

The May 2017 redistribution change deserves deeper examination because it fundamentally altered Cat E's supply dynamics. Before 2017, Cat E received a share of deregistrations from all categories, including Cat D (motorcycles). Motorcycles have high turnover rates — riders upgrade or stop riding more frequently than car owners deregister — so Cat D deregistrations contributed a meaningful number of certificates to the Cat E pool.

When LTA removed Cat D deregistrations from the Cat E calculation, the quota shrank. The policy rationale was sound: motorcycle deregistrations should not create certificates that are then used to register cars, as this undermines the vehicle population management goals. But the practical effect was a permanent reduction in Cat E supply, which contributed to the price run-up in subsequent years.

Today, the 10% redistribution means that Cat E's fate is tied to the car and goods vehicle deregistration cycle. When large cohorts of vehicles reach their 10-year anniversary and owners choose to scrap rather than renew, Cat E quotas expand. When deregistrations slow — as happened during COVID when owners held onto their vehicles — Cat E quotas contract. You can monitor deregistration trends and their impact on upcoming quotas through our Quota Watch page.

When Does Bidding for Cat E Make Sense?

For most individual buyers, bidding in their target category (A or B) is the correct strategy. You should actively consider Cat E only in specific circumstances:

• The premium is under $3,000: At this level, the option value and flexibility arguably justify the cost. Check the latest premiums on our trends page
• Your target category has a bid ratio above 3.0: A high bid ratio means intense competition and a higher chance of failing to secure a certificate. Cat E sometimes has a lower bid ratio, giving you better odds of success
• You genuinely anticipate changing vehicle types: If your family or business situation might require a different vehicle class within the next 10 years, Cat E provides real flexibility
• You are buying a vehicle near the Cat A/B boundary: Some cars are available in both Cat A and Cat B configurations. A Cat E certificate gives you the freedom to choose either version without worrying about category restrictions
• Cat A has exceeded Cat B: When the normal price hierarchy inverts — as it did in February 2026 — Cat E can actually represent a more rational bid than Cat A itself, since Cat E gives you strictly more flexibility at a comparable price

When Cat E Does Not Make Sense

Conversely, avoid Cat E if the premium exceeds $8,000-$10,000 over your target category. At that level, you are paying a steep price for optionality you are unlikely to use. The money would be better allocated to the vehicle itself or set aside for future COE renewal costs. Use our Total Cost Calculator to model how the Cat E premium affects your overall ownership cost over 10 years.

Also avoid Cat E if you are budget-constrained and bidding in Cat A. The entire reason Cat A exists is to provide a lower-cost path to car ownership. Stretching to Cat E when every dollar matters defeats that purpose.

Looking Ahead

The Category E premium is likely to persist as long as the current COE structure remains in place. The March 2026 category review announced by Transport Minister Jeffrey Siow may alter the boundaries between categories — particularly as EV adoption blurs the traditional engine-power distinctions — but the fundamental concept of an open category with option value is unlikely to disappear. If anything, a category restructuring could increase Cat E's relative attractiveness if the new boundaries create more ambiguity about which category a vehicle belongs to.

For the latest Cat E prices and how they compare across categories, visit our trends dashboard. Set up price alerts to be notified when Cat E premiums drop to a level you are comfortable with, and consult the glossary if any of the terminology in this article is unfamiliar.