COE Price Scenarios: Planning Without a Five-Year Forecast
Use lower, unchanged and higher COE assumptions to stress-test a car budget without invented probabilities, price floors or policy promises.
A five-year car budget needs assumptions; it does not need a claim that a particular COE premium is inevitable. Treat future prices as scenarios you can afford or reject, rather than percentages that resemble a calibrated forecast.
Choose an explicit starting point
Use your dated final quotation and identify its COE component. Decide what you are holding constant: vehicle specification, financing, incentive treatment and delivery timing. Then change one variable at a time. A scenario is easier to interpret when the altered assumptions are visible.
Three useful cases
| Case | Assumed premium change | Question to answer |
|---|---|---|
| Lower | −$10,000 | Does waiting cost less than the potential saving? |
| Unchanged | $0 | Would the present package still meet the transport need? |
| Higher | +$10,000 | Does the revised deposit and repayment exceed the budget? |
The $10,000 increments are planning choices, not confidence bounds. If your quote is fixed regardless of the auction result, the retail price may not move one-for-one. Apply the contract’s adjustment terms before calculating the household effect.
What would change supply?
Use published quota windows and the allocation formula. An age cohort is not the same as a measured future deregistration count; renewal and earlier disposals matter. Additional injections are also distinct from replacement quota. Do not assume that current allocation or growth-rate policy extends unchanged beyond its announced period.
What would change demand?
Final vehicle prices, finance costs, available variants and transport needs can change what bidders are willing to pay. But an increase in EV registrations cannot by itself establish additional COE demand: some buyers would have bought another powertrain. A bid ratio also does not reveal all reserve prices.
Keep proposals outside the base case
The 2026 category review is an official process; a separate EV category, a particular threshold or a specific implementation date should not be treated as an enacted outcome. Test such a change separately only if you explain both how vehicles and how quota would move.
PQP is a trailing renewal measure. It is not a price floor protecting new premiums from a fall. Equally, past recoveries do not prove that every later trough will be higher.
Turn the scenarios into a decision
Write down the latest date you need transport, the maximum total payable and an alternative if neither the present nor higher case fits. Revisit the plan when a quotation, quota announcement or household constraint actually changes. Our total-cost calculator can help compare stated assumptions; it cannot certify a future market price.
Sources and review date
Reviewed on 13 September 2026. Historical results retain their exercise dates; worked budgets are assumptions, not quotations.