Index
Forms of Bizkaia: what each one is and when it falls due
The guides to the 18 forms in the official calendar of Bizkaia: who files them, their 2026 deadlines and their official links.
Bizkaia
Under the Concierto Económico (Economic Agreement), the Diputación Foral de Bizkaia has its own tax authority, with its own forms and calendar. With Batuz, income and expenses are also entered in an electronic record book (LROE, form 140).
| Form | What it is | Deadlines in 2026 |
|---|---|---|
| 303 | Autoliquidación del Impuesto sobre el Valor Añadido | 14 |
| 390 | IVA. Régimen general. Declaración-liquidación final (anual) | 1 |
| 130 | Pago fraccionado. Renta de las Personas Físicas. Empresarios y profesionales | 4 |
| 110 | Retenciones e ingresos a cuenta de trabajo, actividades económicas y premios (trimestral) | 4 |
| 115 | Retenciones sobre rendimientos del arrendamiento de inmuebles urbanos | 16 |
| 123 | Retenciones sobre rendimientos de capital mobiliario (excepto cuentas bancarias) | 16 |
| 111 | Retenciones de trabajo, actividades económicas y premios (mensual) | 12 |
| 180 | Resumen anual de retenciones sobre arrendamientos de inmuebles urbanos | 1 |
| 190 | Resumen anual de retenciones de trabajo, actividades económicas y premios | 1 |
| 193 | Resumen anual de retenciones sobre capital mobiliario (excepto cuentas bancarias) | 1 |
| 347 | Declaración anual de operaciones con terceras personas | 1 |
| 349 | Resumen recapitulativo de operaciones con sujetos pasivos de la UE | 16 |
| 200 | Impuesto sobre Sociedades. Régimen individual | 1 |
| 203/223 | Impuesto sobre Sociedades. Pago fraccionado de normativa foral | 1 |
| 218/222 | Impuesto sobre Sociedades. Pago fraccionado de normativa estatal | 3 |
| 100 | Impuesto sobre la Renta de las Personas Físicas (campaña 2025) | 1 |
| 140 | LROE de personas físicas y ERAR (Batuz). Declaración informativa del Libro Registro de Operaciones Económicas | 5 |
| 240 | LROE de personas jurídicas y establecimientos permanentes de no residentes (Batuz) | 0 |
All its deadlines, month by month: the 2026 tax calendar for Bizkaia.
The Seguridad Social (the self-employed contribution and employees’ social security contributions) is the same as in the rest of Spain.
Official sources
Where what this page says comes from, consulted on the review date. If something does not match, the source prevails.
- 2026 tax calendar for Bizkaia Diputación Foral de Bizkaia
Keep reading
- BizkaiaThe 128 deadlines of 2026 in Bizkaia, month by month: the form, the period and the last day, copied from the official calendar. In .ics and .json.
- Examples7 made-up profiles and the 2026 calendar that Mis Obligaciones’s rules give them: self-employed under direct assessment and under modules, companies, the Canary Islands, Bizkaia and Navarre.
- GlossaryWhat an autoliquidación, the 70% rule, REDEME, SII, IGIC, the Concierto Económico or RETA are, explained in two sentences with their official source.
- Filing lateWhat it costs to file a Hacienda form late or pay the Seguridad Social late: 1% per month, 15%, the €200 penalty and the 10% and 20% surcharges.
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.