For vehicle motor taxation renewals, your PIN number is now the last six digits of the Vehicle Registration Certificate (V.R.C.) number which appears at the top right hand corner of the front of the V.R.C. and begins with the letter C. Your PIN number for this vehicle will remain the same unless its ownership is changed or you make an application for a replacement V.R.C., in which case a new V.R.C. is processed, and a new PIN created.
For brand new / imported vehicles the last six digits of the chassis number remains the PIN to be used when the vehicle is being taxed online for the first time.
If you have a query in relation to PIN Numbers you should contact the Department of Transport at Tel: 0818 411 412 or e-mail: Motortax@transport.gov.ie