Switching student health insurance mid-stay — without opening a gap
Changing insurer while you are in Spain on a student authorisation involves two bodies of law that almost nobody reads together. Insurance-contract law decides when and how you can leave a policy. Immigration law decides what a gap between policies costs you — and it is the immigration side that has teeth. This page connects the two, with both texts read at source.
Two laws, one decision
Whether you can switch is a question for Ley 50/1980, de Contrato de Seguro — the law that governs every insurance contract in Spain — together with the terms of your own póliza. Whether you should, and above all when, is a question for Real Decreto 1155/2024, because your authorisation to be in Spain was granted on the strength of the cover you evidenced, and the regulation does not treat that as a one-off event.
Generic advice handles the first question and ignores the second. The result is a student who lawfully ends one policy in March, starts another in April, and only discovers at the prórroga that the fortnight in between was never theirs to give away. Nothing about the switch itself was wrong; the sequencing was. So this page takes the two laws in order, and then puts them together into the only sequence that is safe.
Article 22: how a policy runs, and how you stop it renewing
Article 22 of Ley 50/1980 — as amended with effect from 2016 — is short enough to take clause by clause. On duration, article 22.1: "La duración del contrato será determinada en la póliza, la cual no podrá fijar un plazo superior a diez años. Sin embargo, podrá establecerse que se prorrogue una o más veces por un período no superior a un año cada vez." The term of the contract is whatever the póliza says, capped at ten years, and the póliza may provide for renewal one or more times, each renewal of no more than a year.
On getting out at renewal, article 22.2, quoted in full because the two periods in it are the whole mechanism:
Either party may oppose the renewal by written notice to the other: at least one month before the end of the current period of insurance where the person opposing is the policyholder — you — and two months where it is the insurer. Two more clauses complete the picture. Article 22.3 obliges the insurer to tell you about any modification of the contract at least two months before the current period ends. And article 22.4 provides that "las condiciones y plazos de la oposición a la prórroga de cada parte, o su inoponibilidad, deberán destacarse en la póliza" — the conditions and time limits for opposing renewal, or the fact that renewal cannot be opposed, must be set out prominently in the póliza itself.
One discipline runs through everything here: we are not going to characterise anyone else's policy. Not its terms, not its quality, not its renewal behaviour. Article 22.4 exists precisely so that you can read your own póliza's duration and renewal conditions and find the answer highlighted. That document — not this page, and not any comparison site — is the authority on what you currently hold.
Article 55.2: continuity is the requirement
Now the second body of law, and the reason timing dominates everything. Your student authorisation was granted against the requirements of article 35 of RD 1155/2024 — letter i) being "un seguro de enfermedad, concertado con una entidad aseguradora autorizada para operar en España, con prestaciones similares a las concedidas por la cartera común básica de servicios asistenciales del Sistema Nacional de Salud, válido para la duración de la estancia prevista". Article 55.2 then makes that a continuing state of affairs, in two sentences we quote because paraphrases of them consistently lose the point:
Throughout the life of the authorisation you must maintain the requirements it was granted on, and the Administration may demand proof that you still meet them at any moment of its choosing. A switch that leaves ten uninsured days between policies fails the first sentence for those ten days, and the second sentence means you do not control when the question gets asked.
If your stay runs long enough to need a prórroga, the question is guaranteed to be asked. Article 55.3 requires the extension application to re-evidence article 35 letters b), h) and i) — the insurance letter among them. The file you submit will contain a certificate naming an insured period; a period that starts the month after your old policy ended documents the gap for you. That is why a lapse between insurers is more than an insurance question: it can leave you without the continuous health cover your immigration situation may require, documented in the very file that gets re-checked. the renewal page covers what the prórroga re-proves, and none of it is negotiable at the counter.
The only safe sequence
Read together, the two laws dictate an order of operations. Notice periods run backwards from your current policy's renewal date; continuity runs forward from its last covered day. The sequence that respects both:
The annual lock-in assumption — and what we can say about our own plan
A lot of what ranks for this search assumes every student policy is an annual contract you are locked into. We can only speak for the plan we arrange, so here is what it is: the Sanitas International Students plan is issued for an insured period of three to fourteen months, matched to the course, and renewable. Policies start on the 1st of a month and can be contracted up to six months ahead — which means a switch or a renewal can be lined up against your current end date well in advance, rather than in the final fortnight. Each insured period generates its own certificate naming its own dates, which is the document an extension file wants. Durations of 4, 5 and 7 months are not currently selectable in our calculator pending confirmation from Sanitas.
Whether an annual-contract assumption is true of any other policy is a question for that policy's own duration clause, where article 22.1 puts it and article 22.4 makes it findable. We assert nothing about anyone else's terms — in either direction.
And one question we will flag rather than answer, because it is Sanitas's to answer and not ours: whether a student can join this plan part-way through a course — with the proof-of-studies certificate showing a start date months in the past — is an underwriting question we have not had confirmed. If that is your position, email us with your course dates and when your current cover ends, and we will put the specific case to Sanitas before you serve notice on anything. Eligibility, premium and policy terms are confirmed before a policy is issued.
Before any of that, check the policy you already hold against the statutory conditions — the validity checklist runs them in order, and the certificate page explains what the document itself must show. If what prompted the switch is a placement or a job changing your circumstances, internships and working on a student visa cover the situations where the right answer is not a new policy at all.
We arrange insurance; we do not advise on Spanish insurance-contract or immigration law, and nothing on this page is a substitute for advice from someone who does.
Price the replacement before you serve any notice
The calculator prices the exact insured period from your date of birth, your province and the months remaining in your stay — so you can see whether the dates line up with your current end date before anything is cancelled. Nothing is arranged and no cover is created by quoting.
Read 24 August 2026
Both texts were read in full at the consolidated BOE versions on the date shown. A page connecting two laws is only as good as its weakest quotation, so the load-bearing clauses are quoted verbatim above rather than paraphrased.
Switching insurer on a student authorisation
This page describes what the two laws say and how our own plan works. It is not legal advice, and decisions on your authorisation rest with the Spanish authorities.