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Tax calendar of a lawyer with a rented office: no 130, and a 115

With what Marta answers in the questionnaire, Mis Obligaciones suggests 7 forms and 30 deadlines in 2026: 115, 303, 390, RETA, 180, 347, 100. It comes from the same rules as the app and from the official calendar of Mainland Spain and the Balearic Islands.

Reviewed on 4 min read

In a nutshell

Who
Marta
For those taxed in
Mainland Spain and the Balearic Islands
Forms
115, 303, 390, RETA, 180, 347, 100
Deadlines in 2026
30

What they answer in the questionnaire

Marta (made up) is a lawyer in Valencia. Almost all her clients are companies that withhold income tax (IRPF) on each invoice, so more than 70% of her income is already subject to withholding. She rents an office and withholds tax from the landlord, and with one of her clients she goes over €3,005.06 in the year.

  • Works as self-employed (autónomo)
  • Tax residence in Mainland Spain and the Balearic Islands
  • VAT under the general scheme
  • Income tax (IRPF) under simplified direct assessment
  • Pays contributions as self-employed
  • At least 70% of what it invoices is subject to withholding
  • Rents premises and withholds tax from the landlord
  • Goes over €3,005.06 a year with some customer or supplier

The forms suggested, and why

Each form comes from an answer. The “why” column is what the app shows in the review, before anything goes into the list.

FormWhyDue in 2026
Modelo 115Pays rent on business premises with withholding.20 Jan, 20 Apr, 20 Jul, 20 Oct, 20 Jan
Modelo 303Settles VAT (or IGIC): every quarter, or every month if it is a large business or is in the monthly refund scheme.30 Jan, 20 Apr, 20 Jul, 20 Oct, 1 Feb
Modelo 390Anyone who settles VAT also files the summary for the year.30 Jan, 1 Feb
RETAPays contributions as self-employed: the contribution is charged every month.30 Jan, 27 Feb, 31 Mar, 30 Apr, 29 May, 30 Jun, 31 Jul, 31 Aug, 30 Sep, 30 Oct, 30 Nov, 31 Dec
Modelo 180Anyone who withholds on rent also files the summary for the year.2 Feb, 1 Feb
Modelo 347Goes over €3,005.06 in the year with some customer or supplier.2 Mar, 1 Mar
Modelo 100As a self-employed person, files the income tax return.30 Jun, 30 Jun

Their 2026, deadline by deadline

Last dayFormPeriod
20 January 2026Modelo 1154T 2025
30 January 2026Modelo 3034T 2025
30 January 2026Modelo 3902025
30 January 2026 *RETAenero 2026
2 February 2026Modelo 1802025
27 February 2026 *RETAfebrero 2026
2 March 2026Modelo 3472025
31 March 2026 *RETAmarzo 2026
20 April 2026Modelo 1151T 2026
20 April 2026Modelo 3031T 2026
30 April 2026 *RETAabril 2026
29 May 2026 *RETAmayo 2026
30 June 2026Modelo 1002025
30 June 2026 *RETAjunio 2026
20 July 2026Modelo 1152T 2026
20 July 2026Modelo 3032T 2026
31 July 2026 *RETAjulio 2026
31 August 2026 *RETAagosto 2026
30 September 2026 *RETAseptiembre 2026
20 October 2026Modelo 1153T 2026
20 October 2026Modelo 3033T 2026
30 October 2026 *RETAoctubre 2026
30 November 2026 *RETAnoviembre 2026
31 December 2026 *RETAdiciembre 2026
20 January 2027 *Modelo 1154T 2026
1 February 2027 *Modelo 1802026
1 February 2027 *Modelo 3034T 2026
1 February 2027 *Modelo 3902026
1 March 2027 *Modelo 3472026
30 June 2027 *Modelo 1002026

* Date worked out with the deadline rule, because the official calendar for that year has not been published yet. Check it when it comes out.

Before you copy it

This is an example with a made-up person. Your case may have exceptions that a questionnaire cannot see: Mis Obligaciones suggests and you review, and if you have someone who advises you, you show it to them.

How to check it yourself

You do not have to take any of this on trust: these are the steps to see it in the app with your own eyes.

  1. Open Mis Obligaciones and create your account, or sign in with yours.
  2. In the questionnaire (“Cuéntanos tu actividad y te proponemos el calendario del año”, “Tell us what you do and we will suggest the year’s calendar”), answer as Marta.
  3. Review the suggestion: each deadline has its reason and the link to its official page.
  4. Press “Añadir 30 plazos a mi lista” (“Add 30 deadlines to my list”). Those already past can be marked as filed in one go.

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Frequently asked questions

How many deadlines does Marta have in 2026?

30, from 7 forms: 115, 303, 390, RETA, 180, 347, 100. It is Mis Obligaciones’s suggestion based on their answers; Marta reviews it before accepting it.

How do I get my own calendar?

Open Mis Obligaciones and answer the questionnaire: your legal form (self-employed or company), where you are taxed, your VAT and income tax schemes, whether you have employees, whether you rent premises… It suggests the forms for the year, each one with its reason, and nothing goes into your list until you accept it.

Official sources

Where what this page says comes from, consulted on the review date. If something does not match, the source prevails.

  1. 2026 tax calendar for Mainland Spain and the Balearic Islands Agencia Tributaria

Keep reading

This is information copied from official sources to help you find your way, not tax advice: your case may have exceptions. Check it on the authority’s website or with whoever advises you.

Your deadlines, and only yours

Tell Mis Obligaciones what you do for a living and it suggests your calendar for the year, each form with its reason. You review it, and it reminds you a week before and the day before.

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