Most buyers focus on the price tag, yet the remaining COE period often has a bigger effect on running cost. If you are learning how to calculate car depreciation Singapore drivers use, the time left on the COE is the divisor that turns a total loss into a yearly one. Combined with how to check PARF value of my car, which gives you the end value, it explains why some cars are cheaper to own than their prices suggest.

How does the remaining COE period enter the formula?

Annual depreciation equals the purchase price minus the end value, divided by the remaining COE years. The remaining period is the denominator, so a longer period spreads the same loss over more years. A car that loses S60,000oversixyearscostsS10,000 a year, while the same loss over three years costs S$20,000 a year.

A worked comparison

Car A costs S120,000withnineyearsofCOEleftandanexpectedPARFrebateofS18,000 at the end. Its loss is S102,000,oraboutS11,333 a year. Car B costs S80,000withthreeyearsleftandnoPARFrebatebecausetheCOEhasbeenrenewed,soitlosesS80,000, or about S$26,667 a year. The pricier car is far cheaper per year, which the sale price alone would never reveal.

Why does the PARF rebate interact with the COE period?

The PARF rebate is a percentage of the ARF paid, and that percentage falls as the car ages because it steps down each year. A car with a long COE period is generally younger and therefore sits in a higher rebate band. That combination, a larger end value spread over more years, is why younger cars often show lower yearly depreciation.

When can a shorter period still make sense?

Older cars with shorter periods usually have lower purchase prices, and for some buyers that suits a short ownership horizon. If you expect to keep the car only a few years, the cheaper entry cost can be attractive even though the yearly figure is higher. The key is to compare the yearly number and your own plans, not the sale price on its own.

What happens if you deregister early?

If you deregister before the COE ends, the real loss depends on the COE rebate and the PARF rebate at that age. The yearly formula assumes you hold the car to the end of the COE, so for early exits you should recalculate with the actual rebate at the planned date. OneMotoring’s enquiry shows the current total.

How can you test scenarios quickly?

Change one input at a time: price, rebate or remaining years. The TopBid calculator at https://topbid.sg/car-depreciation-calculator makes this easy and shows how sensitive the yearly figure is to each factor. You will usually see that adding a year of COE helps more than a modest price cut.

Why do renewed-COE cars behave differently?

A renewed COE does not carry a PARF rebate, so the whole price is lost over the renewal period, which is usually shorter. This pushes the yearly figure up unless the purchase price is very low. When you see a bargain price on an older car, check the renewal length before celebrating.

How does COE length at purchase affect negotiation?

Each extra year of COE has real value, so it should show up in the price. If two similar cars have different periods left, the one with more time should cost more, but not necessarily by the same proportion. Use the yearly figure to judge whether the price difference is fair.

Conclusion

A longer COE period lowers the yearly figure because it spreads the loss. Knowing how to calculate car depreciation Singapore buyers should use, and how to check PARF value of my car to get the end value, lets you judge cars on what they truly cost each year.