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Taxes

Spanish tax return 2026: 7 mistakes freelancers still make

From missing the new deductible expenses to misreporting withholdings—we cover the mistakes that trigger fines.

April 18, 20267 min read
IRPFFreelancersTax filing

Key takeaways

The tax office now cross-checks your expense ledger in real time, so mismatches surface instantly.

  • Match your withholdings to forms 130/131 you filed.
  • Report the real Social Security quota, which now varies monthly.
  • Avoid mixing personal expenses by using a dedicated business account.

Calculation pitfalls

Real-income contributions mean your quota changes quarterly. Averaging the amount can create an unexpected bill in June.

Compare form 130 with the IRPF calculator before filing. It reveals gaps between your accruals and the actual taxable base.

Support docs

Scan every receipt and share a drive with your accountant. The tax office can request them up to four years later.

If you financed equipment with an ICO loan, log the interest deduction properly—simulate it with the loan calculator.

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