Address registration with Þjóðskrá (Registers Iceland)
Once you have arrived and have a residence — even temporary — you register with Þjóðskrá Íslands (Registers Iceland) at skra.is. For third-country nationals the residence permit issued by Útlendingastofnun feeds into Þjóðskrá and triggers the kennitala. EU/EEA citizens register directly. Address changes are subsequently handled online via island.is or skra.is. Documents typically required: passport, residence permit (for non-EEA), rental contract or letter of accommodation.
Kennitala — the universal personal identification number
The kennitala is a ten-digit personal identification number issued by Þjóðskrá and used by every authority, bank, employer, healthcare provider and utility company. You will be asked for it routinely. The kennitala is permanent and ties together civil-status, tax and residence data. For third-country nationals it is generated when the residence permit is registered; for EEA citizens it follows the Þjóðskrá registration. There is no parallel tax number — the kennitala does both jobs.
Bank account, mobile, electronic ID (rafræn skilríki)
With kennitala in hand you can open an account at Landsbankinn, Íslandsbanki or Arion banki — the three main Icelandic banks. Documents typically required: passport, kennitala, residence permit and proof of address. English-language onboarding is standard.
An Icelandic SIM (Síminn, Vodafone Iceland, Nova) is the practical entry point to rafræn skilríki — the national electronic ID, which is activated as a feature on the SIM and is the standard login for island.is, online banking, tax filing and healthcare records. Without rafræn skilríki most public-sector flows stall, so prioritise this in the first weeks.
Public emergency notifications (volcanic activity, severe weather) are pushed by SMS to Icelandic numbers automatically — another reason to switch to a local SIM early rather than roam.