The offer is signed and HR sends a document list. A sensible order for the number, the social-security side, the bank — and how to stop your name being spelled three different ways.
Onboarding into a first Spanish job rarely fails on the big things. It stalls on small ones: a document requested a fortnight too late, an account opened in a slightly different name, a number transcribed with one character wrong. In Bilbao the sequence matters more than the difficulty of any single step.
Start by separating three ideas that get bundled together in conversation. The NIE is an identification number. The right to work comes from your nationality or from an authorisation granted to you, not from the number. And registration with the social-security system is a third thing again, normally handled as part of your hiring. Holding one of the three never automatically produces the other two, and an employer who tells you otherwise is being optimistic.
What HR usually needs from you is short and predictable: an identification number, a social-security number, an account for payroll and an address. What they rarely explain is that these arrive from different places at different speeds. The number is yours to arrange. The social-security number is often obtained around the point of hiring, sometimes by the company, sometimes by you. The bank account is entirely on you, and it is the one people leave latest.
If you are arriving from another EU country, contribution history is worth raising early rather than at your first payslip. Periods worked elsewhere are dealt with through coordination arrangements between national systems, and the details depend on where you contributed and for how long. Ask the relevant official body or your employer's gestoría rather than guessing from what a colleague experienced a few years ago.
The banking step deserves more care than it gets. Payroll goes to an account held in your own name, and if the name on the account does not match the name on your contract, someone in accounts will eventually send it back. This is where Bizkaia newcomers with two surnames, a middle name, an accent or a transliterated passport name run into trouble. Pick one exact spelling, in one exact order, and use it everywhere — on the contract, at the bank, on the register, on every form.
Check the number itself the moment you receive it, character by character, against whatever document carries it. A single wrong digit propagates quietly through payroll, health cover and tax filings, and is far more tedious to correct once three systems disagree with each other. Photograph the document, store the reference somewhere you will still find it in two years, and keep the paper original.
The practical advice for Bilbao is simply to start earlier than feels necessary. Appointment supply is finite, hiring dates are not always flexible, and the first payroll cycle is an unforgiving deadline. If your start date is close and something is missing, say so to your employer immediately — they have seen it before. And because procedures and forms get revised, check what is actually being asked for today against an official source, or put the question to someone qualified, rather than trusting a checklist you found online.