January is one of the busiest months of the year for freelancers (autónomos) and small companies (pymes) in Spain. It marks the end of the fiscal year, and with it comes a long list of quarterly and annual tax obligations. To help you stay organized, here’s a clear breakdown of what needs to be filed, when, and by whom.

Key Deadline in January

Most tax forms must be submitted by 31 January, depending on the model.

Forms Due by 31 January (Quarterly Filings – 4th Quarter)

VAT – Form 303 (4th quarter)

Quarterly VAT declaration for freelancers and companies under the general VAT regime.

Income Tax – Form 130 (direct estimation)

Quarterly personal income tax payment for freelancers under the direct estimation method.

Income Tax – Form 131 (modules)

Quarterly payment for those under the objective estimation (modules) system.

Withholdings – Form 111

Quarterly declaration of withholdings applied to employees, professionals, or other businesses.

Rental Withholdings – Form 115

Quarterly declaration of withholdings on commercial property rentals.

Intra‑EU Operations – Form 349 (quarterly)

For businesses that buy or sell goods or services within the EU.

Forms Due by 31 January (Annual Summaries)

VAT – Form 390

Annual VAT summary for the entire fiscal year.

Withholdings – Form 190

Annual summary of withholdings applied to employees and professionals.

Rental Withholdings – Form 180

Annual summary of withholdings on commercial property rentals.

Operations with Third Parties – Form 347

Although often filed in February, many businesses prepare it in January.

Why January Is So Important

January concentrates both the last quarterly filings and the annual summaries, making it the most demanding month for tax compliance. Missing a deadline can lead to:

• Surcharges
• Penalties
• Late‑payment interest
• Increased risk of future tax reviews

Practical Tips to Stay on Track

• Organise invoices early
• Reconcile bank movements with your accounting
• Double‑check withholdings before submitting forms
• Review EU transactions if you file Form 349
• Ask your advisor to review any unusual December entries