How are self-employed taxes calculated? How are the results of quarterly self-employed tax returns (Forms 130 and 303) calculated?

2 min. de lecturaúltima actualización: 02.11.2026

MODELO 130 – IRPF (Personal Income Tax for Self-Employed Individuals)

This is an advance payment based on quarterly results. The calculation is as follows:
  1. Revenue (ingresos) – Expenses (deductible gastos) = Net profit (rendimiento neto)
  2. A deduction for “hard-to-verify expenses” is applied — 5% of profit, up to a maximum of €2,000
  3. 20% is applied to the resulting base → this is the IRPF amount to be paid
Example:
  • Revenue: €15,000
  • Expenses: €5,000
  • Profit: €10,000
  • Minus 5%: €500
  • Taxable base: €9,500
  • IRPF: €9,500 × 20% = €1,900 to be paid
If IRPF has already been withheld on your invoices (retenciones), these amounts are deducted from the total to be paid.
€100 Tax Reduction per Quarter
If your net profit for the quarter does not exceed the minimum interprofessional salary (SMI), the tax agency grants an automatic €100 IRPF reduction.

 

This reduction only applies if certain conditions are met, and only if you are not receiving income from employment. Your situation has been reviewed, and if the reduction applies — it has already been included in the final declaration amount.
So, in addition to the standard 5% deduction for hard-to-verify expenses, you may also have received a €100 IRPF reduction if your income was below the established threshold.



MODELO 303 – VAT (Value Added Tax)

This is a tax on the difference between the VAT you received from clients and the VAT you paid on your expense invoices:
  1. VAT collected (from your invoices) – VAT paid (from your expenses) = VAT payable
Example:
  • VAT collected on invoices: €2,100
  • VAT paid on expenses: €600
  • Difference: €1,500 to be paid
If the difference is negative (your expenses with VAT exceed your income), the remaining amount is carried forward or refunded.

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