Changing working hours or contract type in your first year

The first year of a Spanish employed work authorisation is built around a specific job offer: employer, occupation, contract, salary and Social Security registration. If the employer wants to change your hours, move you from part-time to full-time, reduce a full-time schedule, change the contract type, or alter the role description, the question is not simply whether Spanish labour law allows the amendment. The immigration question is whether the amended contract still matches the basis on which the residence-and-work authorisation was granted.

“When a first-year worker changes hours, I want to see the whole chain: the original approval, the new contract, Social Security, salary and occupation. If those still tell the same story, the file is much safer.”

The short answer

A change of hours with the same employer is usually not the same legal problem as a change of employer. If the occupation, employer and authorised scope remain the same, an increase from part-time to full-time is normally easier to justify than a reduction from full-time to part-time. The employer should still document the change properly, update Social Security where required, and preserve evidence for the later renewal.

The sensitive cases are reductions of hours, reductions of salary, and amendments that quietly change the role. The Ministry's guidance for the initial employed-work authorisation says that the contract must guarantee continuous activity during the validity of the authorisation and that, where the contract is part-time, the remuneration must be at least the full-time annual minimum wage. That rule matters even after approval because the renewal officer later reads whether the real employment remained strong enough to support the card.

Part-time to full-time

Moving from part-time to full-time with the same employer is usually the least problematic contract change. The worker remains in the same company, the same occupation and the same authorisation category. The economic evidence normally becomes stronger, not weaker: more hours, more salary, more Social Security contributions and a clearer continuity story.

That does not mean the change should be invisible. The amended contract or novation should be signed, the Social Security record should reflect the new working time, and payroll should match the new arrangement. If the original authorisation was granted on a part-time contract that already met the salary threshold, a move to full-time will rarely be the problem. The problem is usually administrative sloppiness: payroll does not match the contract, Social Security is not updated, or the job description changes so much that the occupation no longer looks the same.

Full-time to part-time

Reducing from full-time to part-time is more delicate. It may be perfectly legitimate under labour law, but immigration reads the first authorisation through the job that justified it. A reduction that still leaves a stable contract, lawful working conditions and sufficient annual remuneration can be manageable. A reduction that makes the contract look marginal, seasonal, economically weak or below the salary basis used for approval can make renewal harder.

The salary point is central. The Ministry's Hoja 12 for the initial employed-work authorisation states that if the contract is part-time, remuneration must be equal to or higher than the minimum wage for full-time work in annual calculation. That is not a casual drafting note. It is the administration's way of preventing an initial work permit from resting on a tiny part-time job. If your contract is reduced after approval, you should check whether the new annual salary still supports the residence-and-work file.

There is also a timing issue. A reduction in month ten, followed by a renewal two months later, gives the office a recent snapshot of lower activity. A reduction in month four that later returns to stronger employment may be easier to explain. In either case, keep the reason documented: business restructuring, temporary family need, medical accommodation or another lawful reason. The file should not look like the original full-time role existed only to obtain the authorisation.

Contract type changes

Contract type can change in ways that are immigration-neutral or immigration-relevant. A fixed-term contract becoming indefinite normally strengthens the file. A probation period ending successfully strengthens the file. A temporary reduction by agreement can be manageable if salary, occupation and continuity remain clear. But a change from indefinite to very short fixed-term work, a chain of unstable amendments, or a new contract that no longer covers the remaining period of the authorisation can weaken the evidence.

For initial employed work, the original contract must guarantee continuous activity during the period of the authorisation. That phrase matters at renewal. The office is not only counting whether you ever worked; it is reading whether the employment relationship that supported the authorisation remained real, continuous and compatible with the permit. If the contract type changes, ask what story the file will tell six months later.

When scope changes

Some contract amendments are not really about hours. A person may be "promoted" into a different occupation, moved into a different sector, transferred to a different territory, or pushed into self-employed invoices instead of payroll. Those are not simple contract changes. During the first year of an initial residence-and-work authorisation, Article 192.1 of RD 1155/2024 allows the competent body to modify the scope of the authorisation as to occupation, sector of activity and territorial limitation. The request is made by the holder and has a one-month decision period with positive silence.

That Article 192.1 route is different from the first-year change-of-employer rule and from the full employed-to-self-employed switch. It is the tool to consider when the contract change alters what the authorisation actually permits. If the same employer simply increases your hours in the same occupation, Article 192 may not be needed. If the new contract changes the job category or authorised scope, it may be the central issue.

Renewal risk

At renewal, the legal frame changes to Article 80. The office can renew when there is continuity in the employment relationship, or when other renewal grounds are met, such as enough work activity and a new contract, unemployment-protection scenarios, or other listed cases. A contract change during the first year is therefore judged indirectly: did it preserve a credible employment record, or did it leave the worker with thin activity, gaps and unclear salary?

This is why a lawful labour amendment can still be an immigration problem. The contract may be valid between employer and worker, but the residence file has its own evidentiary logic. If the amendment materially reduces hours or salary, the renewal plan should be checked before the change is signed, especially if the TIE expiry date is close.

Documents to keep

Keep the original resolution, original contract, amended contract or novation, Social Security registration records before and after the change, payroll, employer communication, and any internal letter explaining the business reason for the change. If the change may affect occupation or scope, keep the Article 192 filing or legal advice that explains why no modification was required. The goal is a chronological file that makes the change look planned, lawful and consistent with the permit.

General information, not legal advice. Employment amendments, immigration scope and renewal evidence depend on your exact authorisation, dates, contract and Social Security record. A lawyer-client relationship begins only with a signed engagement.