Quarterly Tax Returns for Autónomos

Quarterly tax declarations are the main fiscal control mechanism for autonomos in Spain. Each quarter, you must inform Hacienda about your VAT, your income, and in some cases, withholdings you've applied to third parties.

Quarterly forms and who files them

Not all autonomos file the same forms. Your obligation depends on your tax regime, type of activity, and whether you have employees or collaborators. Here are the main quarterly forms:

Form	Concept	Who files it
303	Quarterly VAT	All autonomos with VAT-subject activity
130	IRPF advance payment	Autonomos under estimación directa (exempt if 70%+ of prior year income had withholding)
131	IRPF advance payment	Autonomos under módulos regime
111	Employee/professional withholdings	Autonomos with employees or paying professionals
115	Rental withholdings	Autonomos renting commercial premises
349	EU intra-community operations	Autonomos with purchases/sales in the EU

Modelo 303 is the most common: if you invoice with VAT, you file it every quarter. In the Canary Islands, it's replaced by Modelo 420 (IGIC).

Modelo 130 is filed by autonomos under estimación directa. You are exempt if at least 70% of your prior year income was subject to withholding.

Modelo 131 is for autonomos who pay taxes under módulos, a simplified regime that calculates IRPF based on objective criteria (premises surface area, electrical power, number of employees).

Modelos 111 and 115 are withholding declarations: they report the IRPF you've withheld from employees, collaborators, or landlords.

Quarterly deadlines

Quarterly declarations are filed during the first 20 days of the month following the end of each quarter, with one important exception for Q4:

• Q1 (Jan-Mar): April 1-20
• Q2 (Apr-Jun): July 1-20
• Q3 (Jul-Sep): October 1-20
• Q4 (Oct-Dec):
  • VAT (303), IRPF advance payments (130, 131), and Modelo 349 (informative): January 1-30
  • Withholdings (111, 115): January 1-20

If the last day of the deadline falls on a weekend or holiday, it extends to the next business day.

Automatic bank debit

If you opt for automatic bank debit (direct debit from your account), the filing deadline moves 5 days earlier:

• Q1, Q2, Q3: until the 15th of the corresponding month
• Q4 (VAT/IRPF): until January 25
• Q4 (withholdings): until January 15

Bank debit is optional, but many autonomos prefer it to avoid forgetting and to be able to file up to the last moment before the charge.

How to prepare each quarter

Filing quarterly declarations requires organization and continuous record-keeping of your operations. Here's a checklist for each quarter:

Before the quarter ends

1. Record all issued invoices: Make sure you have all your sales and income documented.
2. Save received invoices: Any deductible expense must have a complete invoice with your tax details.
3. Update your expense ledger: Record all deductible expenses (supplies, services, utilities, etc.).
4. Review EU operations: If you've bought or sold in the EU, you'll need to file Modelo 349.

During the filing period

1. Calculate VAT (Modelo 303): Output VAT (charged) minus input VAT (paid).
2. Calculate IRPF advance payment (Modelo 130 or 131): 20% of cumulative net income from January, minus previous payments and withholdings.
3. Calculate withholdings (Modelo 111 or 115): Total sum of withholdings applied during the quarter.
4. File online: Use digital certificate or Cl@ve PIN at the AEAT electronic office.
5. Save receipts: Download and keep the PDF of the filed form.

Useful tools

• Invoicing software: Many programs automatically calculate VAT and generate ledgers.
• Spreadsheet: For manual tracking of income, expenses, and withholdings.
• Tax advisor: An accountant can file forms for you and optimize your tax burden.
• Radar Fiscal: Use the calendar extension to never miss a quarterly deadline.

Common mistakes to avoid

1. Forgetting the Q4 deadline

The fourth quarter has different deadlines depending on the form. Many autonomos file Modelo 303 on January 20 thinking it's the general deadline, but they have until January 30. However, withholdings (111, 115) do expire on January 20.

2. Not filing negative declarations

If input VAT is greater than output VAT, the result is negative. You must file Modelo 303 anyway. That negative balance is offset in subsequent quarters or you can request a refund in Q4.

3. Confusing invoice date with payment date

The general criterion is the accrual date (when the invoice is issued), not when it's collected or paid. Invoices issued on March 31 are declared in Q1, even if you collect them in April.

4. Not declaring EU operations

If you buy or sell in other EU countries, you must file Modelo 349 in addition to 303. It's a mandatory informative declaration.

5. Not keeping invoices

The tax authority can request proof of deducted expenses for the following 4 years. Keep digital or physical copies of all invoices.

6. Filing the wrong form

Autonomos under módulos must file Modelo 131 (not 130). Autonomos in the Canary Islands file Modelo 420 (IGIC) instead of 303 (VAT).

Annual summaries and informative forms

In addition to quarterly declarations, there are annual summaries filed in January along with Q4:

• Modelo 390: Annual VAT summary (until January 30)
• Modelo 180: Annual rental withholding summary (until January 31)
• Modelo 190: Annual employee withholding summary (until January 31)

These forms are informative and generally mandatory, but Modelo 390 can be exempt in specific cases.

Penalties for non-compliance

Not filing a quarterly declaration or doing so late results in surcharges for voluntary late filing (LGT art. 27):

• 1% base surcharge, plus an additional 1% for each full month of delay
• Example: 3 months late = 4% surcharge (1% + 3x1%)
• After 12 months: 15% surcharge plus late payment interest
• If Hacienda formally requests the declaration: penalties of 50% to 150% depending on severity

Filing on time is always cheaper than regularizing later.

Tools to track deadlines

Managing multiple quarterly forms can be complex. Here are useful resources:

• Radar Fiscal: The Chrome extension shows all tax deadlines in your calendar, with reminders and filters by form.
• AEAT Electronic Office: From your personal area you can see drafts, file forms, and check previous declarations (sede.agenciatributaria.gob.es).
• AEAT mobile app: Allows filing some forms and checking the status of your tax obligations.
• Accounting software: Programs like ContaPlus, A3, or Sage integrate invoicing, accounting, and form filing.