You can apply to retain the carplate of your vehicle before the vehicle is de-registered. All outstanding fees/taxes/charges (if any) must be settled first.
A retained number is non-transferable. The vehicle owner can use the retained number to:
(a) Register a new vehicle in his/her name at $100; or
(b) Replace the registration number on an existing vehicle registered in his/her name at $1,300.
Once a vehicle registration number is retained, it cannot be cancelled and any fee paid is non-refundable. The retained number is valid for 12 months from the date of approval of the retention application.
Retention can be done either at LTA or at Onemotoring.com.sg under e-services.