How COE Bidding Works in Singapore: The Complete Guide

Most people know COE prices are determined by bidding but have a fuzzy idea of what that actually means — they imagine something like a stock market or an auction house. The reality is more precise, and understanding the mechanics explains why prices move the way they do and why trying to "game" individual exercises is harder than it looks.

The Bidding Schedule

Bidding exercises happen twice a month. Each exercise opens on a Monday at 12:00 PM and closes on the following Wednesday at 4:00 PM. Results are published the same day, typically within a few hours of closing.

The LTA runs five categories simultaneously: - Category A — Cars with engine capacity ≤1,600cc and ≤130bhp (or EVs ≤110kW) - Category B — Cars with engine capacity >1,600cc or >130bhp (or EVs >110kW) - Category C — Goods vehicles and buses - Category D — Motorcycles - Category E — Open category (usable for any vehicle except motorcycles, in practice mostly used for Cat B vehicles)

Each category has its own quota — the number of COEs available for that exercise. You can only bid in the category that matches your vehicle.

The Open Bidding Mechanism

This is the part that surprises most people. Singapore's COE system uses what the LTA calls "open bidding," and it works differently from a traditional sealed-bid auction.

Here's how it actually functions:

1. Bidders (usually car dealers on behalf of buyers) submit a reserve price — the maximum they're willing to pay.
2. The system starts at a low Current COE Price (CCP) and raises it in S$1 increments.
3. Any bidder whose reserve price is at or above the current CCP remains in the pool. Bidders below the CCP drop out automatically.
4. This continues until the number of remaining bidders equals the available quota.
5. The final price — called the Quota Premium (QP) — is the lowest unsuccessful bid plus S$1.

The crucial feature is that everyone pays the same price, regardless of what they initially bid. If you bid S$115,000 and the QP clears at S$106,501, you pay S$106,501. This uniform-price mechanism is designed to prevent the price from being inflated by a small number of outlier bids.

In practice, almost all bidding is done by car dealers. When you're buying a new car, the dealer bids on your behalf. You agree to a car price (which includes the cost of obtaining a COE), and the dealer manages the bidding. Some buyers bid directly for used cars or COE renewals.

How to Follow COE Bidding Live

During an exercise, the LTA publishes the CCP in real time on the OneMotoring website. Third-party sites like Motorist.sg and sgcarmart aggregate this data and display it with charts.

The CCP is updated at intervals throughout the three-day exercise window. Early in the exercise, the CCP tends to be lower because many bidders are still in the pool. As it rises, bidders drop out progressively. The CCP can move significantly in the final hours of an exercise as the last competing bids are resolved.

Watching the live feed can be useful if you're trying to understand market sentiment in real time, but it has limited practical value for most buyers because the dealer handles execution.

Reading COE Bidding Results

After each exercise closes, the LTA publishes: - The Quota Premium (QP) — the final clearing price - The number of bids received - The quota for that exercise - The number of successful bids

The ratio of bids received to available quota tells you how oversubscribed the exercise was. In a heavily oversubscribed exercise (e.g., 3,000 bids for 2,000 Cat A COEs), prices are likely to remain elevated in future exercises. A barely oversubscribed exercise (e.g., 2,100 bids for 2,000 COEs) signals that prices are near the demand floor.

The Feb 2026 second exercise produced notable results: Cat B dropped by S$5,889 in a single exercise while Cat A held steady. This kind of divergence reflects the structural shift where mass-market EV buyers have been pushing Cat A demand while some Cat B buyers are reconsidering.

What the Bidding Results Actually Tell You

One common mistake is reading too much signal from a single exercise. Prices fluctuate based on:

• Quota size for that specific exercise (varies quarter to quarter)
• Seasonal demand (Chinese New Year exercises typically run softer)
• Timing of dealer inventory (dealers bid more aggressively when they have cars sitting on their lots)

A more reliable read on the market direction is the Prevailing Quota Premium (PQP), which the LTA publishes monthly. The PQP is the three-month moving average of Quota Premiums and is used when calculating COE renewal costs for cars approaching their 10-year lifespan. Because it's a rolling average, it smooths out single-exercise volatility and gives you a cleaner picture of where prices are trending.

As of early March 2026, Cat A PQP sat at approximately S$106,541 — still above the spot QP from the second Feb exercise, which means the market has been averaging slightly higher in recent months.

Can You Time the Market?

The honest answer is: marginally, and with significant uncertainty.

The most consistent pattern is the Chinese New Year dip. The bidding exercises in late January and early February historically clear at lower premiums than the surrounding months. In 2026, this pattern held — Cat B fell sharply in the second February exercise. If you're flexible on when you take delivery, buying during this window can produce savings in the S$2,000–8,000 range depending on category.

Beyond CNY timing, the structural drivers of COE prices — quota supply calculated from prior deregistrations, and latent demand from a car-owning population — don't move quickly enough for individual buyers to meaningfully exploit. The market is liquid and transparent; sophisticated institutional bidders (fleet operators, major dealers) see the same data you do.

What you can control is not the COE price you pay but the total cost of ownership decision. Whether it makes financial sense to buy a new car at current COE prices, renew an existing car's COE, or buy a used car with remaining COE — these decisions depend on your own PARF rebate situation, mileage profile, and how the post-Budget 2026 depreciation math applies to your specific scenario.

The Singapore COE Navigator walks through this decision framework using real PQP rates, PARF rebate calculations, and worked examples for both new purchases and renewals — because the bidding mechanism is only one piece of a larger financial equation.

A Note on Category E

Category E COEs are open — any vehicle except motorcycles can use them. In practice, buyers of Category B vehicles (larger-engine or higher-power cars) routinely use Cat E COEs because Cat E premiums and Cat B premiums have historically tracked each other closely, with Cat E typically running slightly higher.

In the February 2026 exercise, Cat E came in at S$112,890 versus Cat B at S$105,001 — a S$7,889 spread. This means using a Cat E COE for a Cat B car added cost in this exercise, which is the normal pattern. Cat B buyers should check both premiums before committing to a specific exercise, though in practice the dealer typically manages this.