The Renta in Spain: Filing Your First Modelo 100 in 2026

Ask anyone who has lived in Spain for a few years about the Renta and you will get a shrug. Ask someone facing their first one and you will get something closer to dread. The gap between those reactions is mostly familiarity. The Spanish annual income tax return is not especially complicated once you understand what it is trying to do, but the first one lands at the worst possible time, when you are still working out how everything else here works.

What the Renta actually is

The Renta is the annual settling up of your personal income tax, the IRPF. Over the course of a year, tax has probably been withheld from your salary or your pension, and you may have paid instalments if you are self employed. The Renta puts every source of income for that year onto one return, works out what you actually owed, compares it with what was already collected, and produces a single number: a refund, or a bill.

The form itself is Modelo 100. In practice almost nobody fills it in from scratch. The Agencia Tributaria pre populates a draft, the borrador, with everything it already knows about you, and your job is to check it, correct it and add what is missing. That distinction matters more than anything else here. The draft is a starting point, not a statement of fact, and confirming it without reading it is how people end up filing something wrong.

One year always lags behind. The return you file in spring 2026 covers the 2025 tax year, which ran from 1 January to 31 December 2025. If you arrived in Spain during 2025 and became tax resident that year, this is the return where your move shows up.

Who actually has to file

Not every resident has to submit a Renta. Spain sets income thresholds, and the most commonly quoted one is 22,000 euros of employment income from a single payer. Below that, with nothing else going on, you are generally not obliged to file.

The threshold drops sharply if you had more than one payer during the year. Where the amounts from the second and subsequent payers together exceed 1,500 euros, the limit falls to 15,876 euros. That catches more people than it sounds like it should: anyone who changed job mid year, anyone drawing a pension while also working, anyone who had a period on a state benefit. Two payers is a very ordinary situation, and the lower threshold is where a lot of unexpected filing obligations come from.

Other things pull you in regardless of the amounts. Being registered as autónomo, holding assets that require the Modelo 720 asset declaration, having capital gains, or wanting to claim a deduction all point toward filing. And not being obliged to file is not the same as it being pointless: if too much was withheld from your pay, the Renta is how you get it back.

The calendar, and why it is tighter than it looks

The campaign for the 2025 tax year opened for online filing on 8 April 2026 and closes on 30 June 2026. Telephone assistance and in person appointments open later in that window, with phone appointments from late April and office appointments from the start of June. If your return comes out as a payment and you want it taken by direct debit, that has an earlier cut off, on 25 June 2026.

Three months sounds generous. It is not. Appointment slots for telephone and in person help are heavily oversubscribed, and by May they are scarce. And if the draft turns out to be wrong, correcting it takes time you have not budgeted for. People who wait until mid June meet both problems at once. Our page on Spanish tax deadlines sets the Renta window alongside the other dates in the year.

The borrador, and why you should not just confirm it

The draft the Agencia Tributaria prepares is genuinely impressive. It knows your Spanish salary, your Spanish bank interest, your pension if it is paid here, and increasingly your Spanish investment income. For someone with one Spanish job and nothing else, confirming it really is a five minute job.

For almost anyone who moved here, it is not. The draft is built from what Spanish institutions reported. It does not know about the flat you rent out in your old country, the foreign dividends, the pension paid from abroad, or the shares you sold in February. Confirming a draft that is missing half your income is not a shortcut, it is an incomplete declaration with your name on it.

This is why the first Renta after a move is the one to take seriously. It is the return where worldwide income appears for the first time, and where the gap between what Spain already knows and what you actually earned is widest. If you are unsure whether you were tax resident for the year in question, our blog on why the 183 day rule catches people out is the place to start, because that answer decides everything else.

The mistakes first timers actually make

The first is assuming that because no letter arrived, nothing is expected. Spain does not write to tell you that you have become a tax resident, and it does not remind you that a return is due. The obligation is yours to notice.

The second is forgetting that the year of arrival is a whole year. Spain does not split the tax year at the date of your move, so income earned before you arrived can still fall inside a Spanish return. The redundancy payment or the bonus that funded the move is the classic example.

The third is treating foreign tax already paid as the end of the matter. That income still goes on the Renta, and treaty relief is something you claim on the return. To claim it you need proof of the foreign tax paid, which is far easier to gather in January than in June.

The fourth is the regional element. Half of the general tax scale is set by the autonomous community you were resident in on 31 December, and the deductions available vary widely. A friend's outcome in another region will not necessarily match yours. Our hub on paying income tax in Spain explains how the two halves of the scale fit together.

The fifth, and the one people regret most, is leaving it to the last fortnight. Not because the filing takes long, but because everything that goes wrong needs a certificate from somewhere, and certificates take days.

Paying, or being paid

Refunds are the common outcome for employees, because withholding is designed to overshoot slightly. Bills are more common for people with foreign income that was never subject to Spanish withholding, which is exactly the position of most recent arrivals. That is not a penalty, it is simply tax on income that had not yet been collected, and there is normally an option to split the payment in two, with the larger part taken at filing and the remainder later in the year.

The honest bottom line

The Renta is a reconciliation, not an interrogation. It asks you to put the whole year on one page and does most of the work for you where it can. The friction for people who moved here comes entirely from the parts Spain cannot see, and the fix is boring: keep the paperwork through the year, know which country taxed what, and start in April rather than June. Where your situation involves an unusual income type, a change of region, a partial year of residency or a large one off payment, the general shape here still applies but the detail is worth checking against your own circumstances. This is background, not personal tax advice.