The Complete Beginner's Guide to Singapore COE
What Is the Certificate of Entitlement?
The Certificate of Entitlement, universally known as COE, is a licence that grants the holder the right to register, own, and use a vehicle in Singapore for a period of 10 years. Without a valid COE, you cannot legally register a new vehicle on Singapore's roads. When the COE expires after 10 years, the owner must either renew it, export the vehicle, or deregister and scrap it.
The COE system was introduced by the Singapore government in May 1990 as a demand-management tool. Singapore is a small island nation of roughly 733 square kilometres with limited road capacity. By the late 1980s, traffic congestion was becoming a serious problem despite measures like the Area Licensing Scheme (a predecessor to today's Electronic Road Pricing). The government concluded that the most effective long-term solution was to directly control the total number of vehicles on the road.
The mechanism chosen was elegant in its simplicity: decide how many new vehicles the road network can absorb each period, issue exactly that many certificates, and let the market determine the price through competitive bidding. This approach achieves two goals simultaneously. It caps the vehicle population at a sustainable level, and it ensures that the limited certificates go to those who value them most, as revealed by their willingness to pay.
Today, the COE is the single largest cost component of car ownership in Singapore, frequently exceeding the price of the car itself. Understanding how the system works is essential for anyone considering buying a vehicle here.
Why Does Singapore Use the COE System?
Singapore's land area is finite, and roads occupy approximately 12% of the total land mass. Expanding road capacity is extremely expensive and competes with housing, commercial, and green space needs. The government has committed to a 0% vehicle growth rate for cars (Categories A, B, and D) since 2018, meaning the total vehicle population for these categories can only grow through replacement, not expansion.
The COE system supports this policy by ensuring that every new car added to the roads corresponds to one that has been removed. When an owner deregisters a vehicle, a replacement COE enters the supply pool for the next bidding round. This creates a closed loop in which the total fleet size remains stable even as individual vehicles are replaced with newer models.
Without the COE system, Singapore's vehicle population would be determined purely by consumer demand and dealers' ability to import cars. Given the country's high income levels and compact geography (which makes car ownership relatively convenient), demand would almost certainly outstrip the capacity of the road network, leading to severe congestion, higher pollution, and degraded quality of life.
For a deeper exploration of the policy rationale, see our What Is COE guide.
The Five COE Categories Explained
Every COE belongs to one of five categories. The category you need depends on the type of vehicle you intend to register. Choosing the right category is not optional; you must bid in the category that matches your vehicle, with one exception (Category E).
Category A: Cars up to 1,600 cc and 130 bhp
Category A covers smaller cars with an engine capacity not exceeding 1,600 cubic centimetres and a power output not exceeding 130 brake horsepower. Both conditions must be met. This is the most popular category for everyday family cars and has become the primary home for affordable electric vehicles, many of which fall under the power threshold. Cat A consistently sees the highest demand relative to supply, which is why its premiums have been climbing steadily.
Category B: Cars above 1,600 cc or 130 bhp
Category B covers larger and more powerful cars that exceed either the 1,600 cc engine capacity threshold or the 130 bhp power threshold. Luxury sedans, performance cars, larger SUVs, and high-powered electric vehicles fall into this category. Cat B premiums are typically higher than Cat A, though the gap has narrowed significantly in recent years as demand pressure in Cat A has intensified.
Category C: Goods Vehicles and Buses
Category C is reserved for goods vehicles (commercial trucks, vans used for goods transport) and buses. This category serves the commercial and logistics sector rather than private car buyers. Cat C premiums are generally much lower than A or B because the demand profile is different, driven by business needs rather than consumer preferences. The vehicle growth rate for Cat C is set at a slightly more generous 0.25%, reflecting the government's recognition that commercial transport capacity needs to keep pace with economic growth.
Category D: Motorcycles
Category D covers motorcycles and scooters. Motorcycle COE premiums are significantly lower than car premiums, typically in the range of $5,000 to $12,000, reflecting the lower cost and road space demands of two-wheeled vehicles. The motorcycle market has its own distinct dynamics, with a different buyer demographic and different supply-demand balance.
Category E: Open (Any Vehicle Type)
Category E is the Open category. A Cat E COE can be used to register any type of vehicle, whether it would normally fall under A, B, C, or D. Because of this flexibility, Cat E functions as a premium tier. Buyers who want the certainty of a COE without being constrained to a specific category can bid in Cat E, though they pay a premium for that flexibility. Cat E prices are almost always the highest across all categories because it attracts demand from multiple segments simultaneously.
For a detailed comparison of all categories including historical price data, visit our COE Category Comparison page.
How the COE Bidding Process Works
COE certificates are distributed through a uniform-price sealed-bid auction conducted by the Land Transport Authority (LTA) twice a month. Here is how it works, step by step.
Bidding Schedule
There are two bidding exercises per month, typically on the first and third Monday. Each exercise runs for three days, opening on Monday at 12:00 noon and closing on Wednesday at 4:00 pm. During this window, qualified bidders submit their bids through the OneMotoring portal.
Submitting a Bid
To bid, you need an active account on the OneMotoring website (onemotoring.lta.gov.sg). In practice, most individual buyers do not bid directly. Instead, they authorise a car dealer to bid on their behalf as part of the vehicle purchase process. The dealer handles the bid submission, and the COE cost is rolled into the total car price.
Each bid specifies a maximum amount the bidder is willing to pay for a COE. This is a sealed bid, meaning other participants cannot see your bid amount. You can revise your bid upward (but not downward) at any time during the bidding window.
How the Winning Price Is Determined
This is the most important concept to understand: the COE auction uses a uniform price mechanism. All successful bidders pay the same price, which is the lowest successful bid, also called the quota premium.
Here is how it works in practice. Suppose 1,000 COEs are available in Category A for a given exercise. All bids are ranked from highest to lowest. The top 1,000 bids win. The 1,000th highest bid becomes the quota premium, and every winner pays that amount, even if they originally bid much higher.
This system is designed to encourage truthful bidding. Since you will never pay more than the marginal clearing price, there is little incentive to bid below your true valuation. If you bid $120,000 and the quota premium clears at $108,000, you pay $108,000, not $120,000.
Bid Results
Results are published on the LTA website immediately after each exercise closes. You can track all historical results on our Results Archive and follow live bidding exercises on our Live Bidding page.
COE Quota: Where the Supply Comes From
The number of COEs available in each bidding exercise is determined by a quota that LTA announces quarterly. The quota formula has three components:
- Allowable growth: Based on the vehicle growth rate set by the government. For cars (Cat A, B) and motorcycles (Cat D), this is currently 0%. For goods vehicles and buses (Cat C), it is 0.25%.
- Replacement COEs: When an existing vehicle is deregistered (scrapped or exported), a replacement certificate enters the pool. This is the primary source of new COEs for categories with 0% growth.
- Adjustments: Unallocated COEs from previous periods, revoked certificates, and other administrative adjustments.
The practical implication is straightforward: in a 0% growth environment, the only way to get a new car COE is if someone else gives up theirs. This creates a direct link between the deregistration rate and COE supply, and by extension, COE prices.
What Happens When Your COE Expires
When your 10-year COE approaches expiry, you have three options:
Option 1: Renew the COE
You can renew your COE for either 5 or 10 years at the Prevailing Quota Premium (PQP), which is a three-month rolling average of COE auction prices. Renewal does not require bidding; you simply pay the PQP. However, a renewed COE carries no PARF eligibility, meaning you will not receive any Additional Registration Fee rebate when you eventually deregister. Track current PQP values on our PQP page.
Option 2: Deregister the Vehicle
You can deregister your car, which means scrapping it or exporting it from Singapore. Upon deregistration, you receive any applicable PARF rebate (based on the vehicle's age and original ARF paid, at the current rates of 30% down to 5%) plus a pro-rated COE rebate for any remaining COE validity. The vehicle is then removed from the road and a replacement COE enters the supply pool.
Option 3: Export the Vehicle
You can export the vehicle to another country. This is functionally similar to deregistration in that you receive applicable rebates and the vehicle is removed from Singapore's vehicle population.
Our Renew vs Scrap Calculator helps you compare the financial outcomes of renewal versus deregistration for your specific vehicle.
Key Terms Every Buyer Should Know
The COE ecosystem comes with its own vocabulary. Here are the essential terms:
- Quota Premium (QP): The COE price, determined by the lowest successful bid in each exercise.
- Prevailing Quota Premium (PQP): A three-month moving average of QPs, used as the price for COE renewals.
- Open Market Value (OMV): The assessed import value of a vehicle, determined by Singapore Customs. It forms the base for calculating excise duty and ARF.
- Additional Registration Fee (ARF): A tax levied on new vehicle registrations, calculated as a percentage of OMV using a tiered formula.
- PARF Rebate: A rebate of a portion of the ARF paid, returned to the owner upon deregistration within the first 10 years. Rebate rates were significantly reduced in February 2026 (from 75-50% to 30-5%) and capped at $30,000. See our complete guide to ARF, PARF, and rebates for current rates.
- Deregistration: The process of permanently removing a vehicle from Singapore's register, either through scrapping or export.
- Vehicle Entitlement Certificate (VEC): Another term you may encounter; effectively the same concept as the COE in everyday usage.
For a comprehensive glossary of all COE-related terms, visit our Glossary page.
Frequently Asked Questions
Can I transfer my COE to another vehicle?No. A COE is tied to the specific vehicle it was used to register. You cannot detach a COE from one car and attach it to another. If you sell your car, the COE transfers with the vehicle to the new owner. If you want a different car, you need a new COE.
What happens if I do not renew or deregister by the COE expiry date?If your COE expires and you have not renewed or deregistered, the vehicle becomes illegal to drive on Singapore roads. LTA will issue notices, and continuing to use the vehicle can result in fines and seizure. It is important to plan well ahead of the expiry date to avoid complications.
Is it cheaper to bid for COE myself instead of going through a dealer?The COE price itself is the same whether you bid directly or through a dealer. The quota premium is set by the auction, not by who submits the bid. However, dealer markups and administrative fees vary, so the total cost of a car package can differ between dealers. The COE component, though, is fixed at the quota premium for that exercise.
Can foreigners or permanent residents bid for COE?Any individual or company registered in Singapore can bid for a COE, including permanent residents. The bidder must have a valid OneMotoring account. Foreigners on certain work passes can also own cars and obtain COEs, though additional conditions may apply depending on visa type.
Where can I learn more about COE bidding results and trends?COEkaki tracks every bidding exercise with full historical data. Visit our Results Archive for past premiums, the Live Bidding page during exercises, and our FAQ for more common questions.