To compare used-car depreciation in Singapore, subtract a clearly explained estimated exit value from the purchase price, then divide by the years you expect to keep the car. Check the COE expiry date and the assumptions behind that exit value. An advertised annual depreciation figure is a comparison tool, not a forecast of your resale proceeds or a complete ownership budget.
This StarBright Auto guide shows how to check the calculation before using it to shortlist a car. The examples are hypothetical and do not represent our inventory, current market valuations or a financing offer.
Start with the ownership period you actually intend
A listing may show depreciation calculated over all the remaining COE. That is a different question from what it could cost you to buy the car now and sell it in two years.
Write down your intended purchase date, expected exit date and the exact COE expiry date. Use months rather than rounding a car with two years and one month remaining to “about three years”. For a comparison in years, 30 months is 2.5 years.
Estimated annual depreciation = (purchase price − estimated exit value) ÷ ownership period in years.
Ask the seller which price, time period and exit value were used in the advertised figure. If those inputs are unclear, reproduce the calculation yourself before comparing it with another listing.
A lower purchase price can have higher annual depreciation
Suppose you plan to use each of these hypothetical cars until its existing COE expires, without renewal. The assumed exit values are purely illustrative; they are not standard rebates or promised disposal prices.
| Input | Car A | Car B |
|---|---|---|
| Purchase price | S$70,000 | S$58,000 |
| Time to planned exit | 4 years | 3 years |
| Assumed exit value | S$10,000 | S$10,000 |
| Estimated value lost | S$60,000 | S$48,000 |
| Estimated annual depreciation | S$15,000 | S$16,000 |
Car B costs S$12,000 less to buy but has a higher annual figure under these assumptions. This does not make Car A the better purchase: it requires more upfront funding, provides an additional year of use and may have different repair needs. The calculation explains one difference rather than settling the decision.
Separate rebates, body value and resale estimates
Ask what “scrap value” means in the quotation. It may combine amounts with very different levels of certainty:
- PARF rebate: eligibility and amount depend on the vehicle and its age at deregistration. Do not apply another car’s rebate percentage or cap to yours.
- COE rebate: LTA grants a rebate for unused COE when a vehicle is deregistered before its COE expires. There is no unused COE period left at normal expiry.
- Body or export value: establish whether this is a current third-party offer or only an assumption for a future date.
- Resale value: a future selling-price estimate is not the same as statutory deregistration rebates.
Use LTA’s PARF and COE rebate guidance and enquiry service for the specific vehicle and intended deregistration date. LTA’s eligibility rules and schedules differ by vehicle circumstances; do not treat a generic online “scrap value” as a guaranteed payment.
Do not add rebates on top of a resale or disposal offer that already includes them. Ask the buyer or disposal provider to itemise what its quoted amount includes and any fees deducted.
If you plan to sell early, test more than one outcome
For a hypothetical S$70,000 purchase sold after two years, an assumed S$44,000 resale price gives estimated depreciation of S$13,000 a year. If the eventual sale price is S$38,000, the figure becomes S$16,000 a year. A S$6,000 change in the exit assumption changes the two-year average by S$3,000 a year.
Neither sale price is a prediction. The point is to check whether your decision still works with a less favourable outcome. Ask for the basis of an estimate and keep any outstanding loan settlement separate: selling proceeds are not necessarily the cash you take home after repaying the lender.
Do not build an unpriced COE renewal into the calculation
Check whether the COE is original or renewed and, if renewed, its renewal period. For Category A and B cars, a five-year renewal can be taken only once; the vehicle must be deregistered when that renewal ends. A ten-year renewal follows different rules.
LTA’s COE renewal guidance explains the applicable conditions and Prevailing Quota Premium (PQP). A future renewal price is not fixed by today’s used-car asking price. If you are considering keeping a car beyond its current COE, calculate that as a separate scenario with renewal and maintenance costs, rather than extending the years in your formula for free.
Keep depreciation separate from cash flow and running costs
Depreciation does not include insurance, road tax, parking, fuel or charging, servicing, repairs, financing interest or transaction charges. Add these separately when considering affordability. Use workshop quotations for identified work; our premium-car buying checklist explains the vehicle checks that inform that budget.
A monthly loan instalment is a payment schedule. It includes repayment of borrowed principal, so adding the entire instalment to depreciation would double-count part of the car’s cost. Keep a cash-flow plan for bills due and a separate ownership-cost comparison.
Quick questions before you shortlist
Is lower advertised depreciation always better?
No. First align the calculation period and exit assumptions, then compare condition, immediate work and suitability. A lower number based on an optimistic exit value can be misleading.
Can I use today’s rebate enquiry as the value at COE expiry?
Not automatically. The enquiry date matters. Check the amount applicable to the planned date and separate any assumed body value from LTA rebates.
When browsing StarBright Auto’s pre-owned cars, save the listing and ask for the exact COE expiry, renewal history and inputs behind the depreciation figure. Bring those questions to a viewing appointment. This is general comparison guidance, not a recommendation on how much to borrow or spend.