Aiko Tanaka, a video game developer, settled in Valencia on 1 July 2026 on a permanent contract with a Spanish studio. Her former employer in Tokyo still owes her a bonus for the project she left finished, and in September it writes to her: to pay it without withholding tax as if she were a Japanese resident, it needs a certificate of tax residence in Spain. Aiko logs on to the website of the Agencia Tributaria, the Spanish tax agency, with her brand-new electronic certificate, applies, and the system does not issue it.
It is not a system error. In September 2026, nobody can yet know for certain whether Aiko will be resident in Spain in 2026.
Residence is decided by whole years
Article 12 of the IRPF Act (the Spanish personal income tax) provides that the tax period is the calendar year and that the tax falls due on 31 December. Article 9 treats as resident anyone who stays in Spain for more than 183 days during the calendar year, or has the main core of their activities or economic interests here.
In Spain there is, as a general rule, no split year: you are resident or non-resident for the whole year. That is why the year of arrival is awkward. Until it ends, residence depends on what happens in the months still to come.
Aiko's days, and her colleague's
Let us look at Aiko's count and that of Marco, an Italian colleague who joined the same studio two days later.
| Month | Aiko (from 1 July) | Marco (from 3 July) |
|---|---|---|
| July | 31 | 29 |
| August | 31 | 31 |
| September | 30 | 30 |
| October | 31 | 31 |
| November | 30 | 30 |
| December | 31 | 31 |
| Total | 184 | 182 |
- If Aiko does not leave Spain before the end of the year, she reaches 184 days: she exceeds 183 and is resident in 2026 on presence.
- Marco reaches 182: he does not qualify on presence. If he is resident in 2026, it will have to be under the other criterion, the core of economic interests, which requires an analysis of where his assets, income and activity are.
- If Aiko goes back to Japan for ten days at Christmas, sporadic absences are counted unless she proves tax residence in another country, under the same article 9. That nuance can decide the year.
A two-day difference in the arrival date changes the analysis of an entire year. And neither count is closed in September.
Why the Agencia will not issue it in September
The Agencia issues the certificate if residence can be inferred from the data it holds. In September of the year of arrival, it has little: an NIE (the foreigner's identification number), perhaps a tax registration and the withholding the employer is starting to apply. There is still no income tax return saying that Aiko has been resident for the whole year, because the 2026 return will be filed in spring 2027.
The second additional provision of Order EHA/3316/2010 allows the application to be accompanied by documents proving tax residence in Spain. Providing the employment contract, the certificate of municipal registration and social security registration may help in some cases, but it does not make certain a year that has not yet ended. It is prudent not to count on it.
If you are in your first year and a foreign payer is already asking you for the certificate, you can tell us about your case in the certificate form and we will see what can be proved today.
What does exist during the first year
The notice for employees moving to Spain. Article 89 of the IRPF Regulations allows someone coming to work as an employee to report their arrival to the Agencia so that the employer withholds IRPF from the start. The Agencia issues, where appropriate, within a maximum of ten working days, a document showing the date from which that withholding will be applied. It is not a residence certificate, but it is an official document showing that the Spanish administration expects a stay of more than 183 days. The departure in the opposite direction is explained in what to tell your payer if you are leaving this year.
The inbound workers' regime. If Aiko opts for the regime in article 93 of the IRPF Act (often called the Beckham regime), she applies on Modelo 149 within six months of registering with Social Security. Article 120 of the Regulations provides that those under that regime may apply for the certificate of tax residence in Spain, and limits the treaty certificate to the cases the Ministry specifies on condition of reciprocity. A treaty certificate for use with a foreign payer may not be available under that regime; it is worth checking before promising it. The guide to Modelo 149 sets out the deadline.
Documents of fact. Employment contract, municipal registration, tenancy agreement and social security registration. They do not replace the certificate, but they are what exists.
If your previous country's administration issues you a residence certificate for the same year in which you arrive in Spain, it may contradict your Spanish residence. Before asking for it or using it, it is worth knowing exactly what it proves and for what period. What that administration certifies, and with what effect, is confirmed by your adviser there; we tell you how it fits with what will be on record in Spain.
What documentation the payer in the other country accepts
That is not a question we can answer. Whether Aiko's Japanese payer accepts the article 89 document, a statement with the employment contract or only the Spanish certificate is decided by its own rules and procedures, and is confirmed by Aiko's adviser in Japan. What we can prepare is a file of the Spanish documents available, translated where needed, and explain to that adviser what the certificate will say once it can be issued and on what reasonable date.
If the payer will accept nothing but the certificate, there are two alternatives: agree that the payment be made in 2027, when the certificate will be obtainable, or accept the withholding at source and analyse afterwards what part can be recovered and what part is deducted in Spain as double taxation relief. The logic of that deduction is in foreign dividends and excess withholding, applicable with some adjustments to other income.
A realistic timeline
- July 2026: arrival, municipal registration, registration as an employee and, where appropriate, the notice for employees moving to Spain.
- December 2026: close of the year and of the count of days.
- April to June 2027: income tax return for 2026 as a resident.
- Once it is filed: the certificate of tax residence in Spain for 2026, now supported by data the Agencia holds.
For it to come out first time, your tax address must be properly reported from the moment you arrive; we explain this in if you moved and did not report it.
The Salama Tax page describes the certificate and its uses. In the year of arrival there are no shortcuts: residence is proved once the year has produced it, and bringing forward documents that take it for granted can backfire.