How Is the COE Quota Decided? Inside the Vehicle Quota System
Every COE bidding exercise starts with a fixed number of COEs up for grabs — the quota. Where does that number come from? It’s set by the Vehicle Quota System (VQS), and understanding it explains why supply (and therefore prices) shifts over time.
The Goal of the Quota
Singapore manages its vehicle population deliberately to control congestion and road usage. Rather than letting the car count grow freely, the VQS caps how many vehicles can be on the road and releases COEs accordingly.
What Goes Into the Quota
The quota for each category is built mainly from:
- Deregistrations — when a car is scrapped or exported, its COE returns to the pool. This is the largest source of new supply.
- Allowable vehicle growth rate — a policy setting for how fast the total population may expand. In recent years this has been held very low.
- Adjustments / quota smoothing — measures to even out the supply so it doesn’t lurch from feast to famine.
Why Deregistrations Create Cycles
Here’s the key insight: cars bought in a boom year all reach 10 years old around the same time. When they deregister together, a wave of COEs floods back into the quota — and supply loosens. A decade earlier, that same boom meant tight supply. This 10-year echo is why COE supply runs in multi-year cycles.
You can often see the footprints of these cycles in the long-run year-by-year data.
Quota Smoothing
To stop the cycles from causing extreme swings, the authorities have used smoothing — borrowing from quota-rich periods to top up quota-lean ones. This dampens the peaks and troughs but doesn’t remove the underlying cycle.
What This Means for Buyers
- Supply is largely predetermined by past registrations, not by current demand.
- When a deregistration wave is coming, supply tends to ease over the following years.
- When few cars are due to deregister, supply tightens — and prices feel it.
Knowing roughly where the cycle sits helps you interpret whether today’s prices are likely part of a tightening or loosening phase. For the demand side of the equation, see why COE prices rise and fall.
The free COE Price Tracker app helps you watch how the quota dynamics play out in actual prices, with trends and alerts across all five categories.
This article is for general information only and is not financial advice. For official VQS methodology and figures, refer to the LTA.
Related reading: Why COE Prices Rise and Fall · How to Bid for COE
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