The deadlines for filing tax returns are as follows:
- residents: file by 30th of June for the previous calendar year,
- non‑residents: to be filed by 31st of December for the previous calendar year.
For the year 2023, the resident tax return must be filed by 30th of June, 2024, in the case of a non‑resident, the deadline is extended to 31st of December, 2024.
If you are not tax resident in Spain and you have employment income or other income (dividends, interest...) in the country, you must file Form 210 quarterly:
- from 1st to 20th of April,
- from 1st to 20th of July
- from 1st to 20th of October,
- from 1st to 20th of January.
If you are renting property, the deadline is different.