How do I register a car brought from Great Britain to Northern Ireland?

GOV.UK says UK residents can move a vehicle freely between GB and NI where it is already UK-registered, is for personal/household use and is not being moved for sale or another commercial purpose. You should still update DVLA with your address where required.

If you bought the vehicle in GB and are taking it permanently to NI, especially where VAT was not charged in GB, HMRC declaration rules can apply. The facts of the purchase and tax status matter.

Do not submit a foreign-import IVA application merely because the car crossed the Irish Sea if it is already properly UK registered and falls within the normal GB-NI movement rules.

Great Britain to Northern Ireland is not automatically the same as importing a vehicle from a foreign country. An already UK-registered household vehicle can move under specific GB-NI rules, while a vehicle bought in GB for permanent NI use may raise VAT or declaration questions depending on how it was purchased. Establish whether this is a household move, a purchase, or a commercial transaction before choosing an import process. On the facts covered here, the answer is that if it is your own UK-registered vehicle moving with you for private household use, it can generally move between Great Britain and Northern Ireland without being treated like a normal foreign import; buying a vehicle in GB for permanent NI use can create separate VAT/declaration questions. This is one of the areas where the jurisdiction and the exact status of the driver or vehicle matter more than a general UK rule.