Form 22 (Modelo 22) is Portugal's annual corporate income tax (IRC) return that every company with organised accounting must file by May 31. It covers the previous calendar year. The 5 most common mistakes — miscalculated autonomous taxation, omitted state surcharge, misclassified entertainment expenses, inflated Section 07 (tax benefits), and missing IES filing afterwards — generate fines of €450 to €22,500 for inaccuracy (RGIT art.119) and may trigger a tax inspection.

By Hugo Velez Ribeiro, Certified Accountant (OCC nº 64356) · 25+ years experience · HVR Business Consulting · 9 May 2026

What is Form 22 and who must file

Form 22 (Modelo 22) is the annual corporate income tax (IRC) return, regulated by CIRC article 117. It covers the previous economic year — for the 2025 fiscal year, the filing deadline is May 31, 2026.

Required filers:

• Commercial companies (Lda, Sole Trader Lda, SA) with seat or effective management in Portugal
• Cooperatives and associations with economic activity
• Permanent establishments of foreign companies in Portugal
• Companies in liquidation or termination — must file even in the year of closure

May 31, 2026 deadline: what's at stake

The May 31 deadline applies to companies whose fiscal year matches the calendar year. For others, the deadline is the last day of the 5th month after fiscal year-end.

Missing the deadline triggers:

• Late filing fine: €200 to €5,000 (RGIT art.116)
• Non-filing fine: €450 to €22,500 (RGIT art.119)
• Automatic suspension of tax compliance certificates
• Block on applications to tax incentives (RFAI, SIFIDE II, AICEP fiscal contracts)
• Increased risk of tax inspection in the next 4 years

Form 22 structure: 6 essential sections

Form 22 has 14 sections, but only 6 are mandatory and material for most SMEs:

Q03 — Identification data

Tax ID, registered office, CAE code, tax regime. Mistakes here invalidate the entire return — the Tax Authority rejects on upload.

Q05 — Taxable income calculation

The central section. Starts from accounting profit before tax and applies additions (non-deductible expenses, non-allowed provisions, fines) and deductions (tax benefits, capital gains reinvestment, dividends with participation exemption per CIRC art.51).

Q07 — Tax benefits with collection deduction

SIFIDE II (32.5% R&D credit), RFAI (up to 25% in North/Algarve), DLRR, employment creation. These reduce the IRC due — not the taxable income. Common mistake: applying SIFIDE in Q05 instead of Q07.

Q10 — Tax calculation

Applies the IRC rate to taxable income. For 2025/2026, see the rate set in OE2026 on the Portuguese Tax Portal. SMEs in the simplified regime may have a reduced rate on the first €50,000 of taxable income.

Q11 — Municipal surcharge

Applied by the registered office's municipality. Typically 1.5% on taxable income (varies between 0% and 1.5% by municipal council). For taxable income above €1,500,000, the progressive state surcharge (Q12) also applies.

Q13 — Payments on account

Records the PPC already made during the year (July, September, December 15). These deduct from final IRC. Excess PPC is refunded.

5 Mistakes that cost up to €22,500 in fines

Mistake 1: Miscalculated vehicle autonomous taxation

Autonomous taxation on light passenger vehicle expenses (CIRC art.88 nº3) varies by acquisition value: 10% up to €27,500; 27.5% from €27,500 to €35,000; 35% above €35,000. Common error: wrong rate for electric vehicles (favoured regime), or forgetting the +10pp aggravation when the company has a tax loss.

Mistake 2: Forgetting state surcharge above €1.5M

The state surcharge (CIRC art.87-A) applies progressively: 3% from €1.5M-7.5M; 5% from €7.5M-35M; 9% above €35M. Companies that exceed €1.5M for the first time often miss this. AT detects automatically — fine guaranteed.

Mistake 3: Misclassified entertainment expenses

Entertainment expenses bear 10% autonomous taxation (CIRC art.88 nº9). Reclassifying as "travel" or "advertising" to avoid the tax is detected via SAF-T cross-checks. Fine: €750 to €15,000.

Mistake 4: Q07 (tax benefits) without documentation

SIFIDE II, RFAI and DLRR require a technical dossier kept for 10 years. Claiming credit without supporting docs leads to: full credit refund + ~4% annual interest + fine up to €22,500.

Mistake 5: Filing Form 22 but forgetting IES

Form 22 doesn't replace IES (Simplified Business Information), due July 15. Inconsistencies between the two trigger automatic AT alarms. About 30% of SME tax inspections start here.

When to hire a Certified Accountant

For SMEs with turnover above €200,000, or with: cross-border operations, applications to SIFIDE/RFAI/DLRR/AICEP fiscal contracts, stock options or RSUs distributed to employees, transfer pricing with related entities, corporate changes (merger, spin-off, transformation).

The cost of error far exceeds the fees of a Certified Accountant. HVR Business Consulting handles Form 22 for Lisbon-based companies since 2014, with mandatory technical review before filing with AT.

Frequently Asked Questions

Who is responsible for Form 22 accuracy?

Jointly: the Certified Accountant (who signs) and the directors/managers (who approve). In case of material error, AT may impute responsibility to both (CIRC art.117 + LGT art.24).

Can I file Form 22 without a Certified Accountant?

Only companies in the tax transparency regime (professional partnerships) or in the simplified regime with very low turnover. The vast majority of organised-accounting companies require an OCC-registered CC.

What happens if the company had a loss?

You file Form 22 with zero IRC or only autonomous taxation. The fiscal loss can be carried forward 5 years (CIRC art.52), with an annual cap of 65% of the year's profit when used.

How to amend a filed Form 22?

Replacement filing on the Tax Portal, with payment of difference + compensatory interest if additional IRC is due. Spontaneous correction (before inspection) avoids the inaccuracy fine.

Can the May 31 deadline be extended?

No general extension. In exceptional cases (catastrophe, serious illness of the CC), an extension can be requested with justification, but rarely granted.

How much does HVR charge for Form 22?

For monthly accounting clients with us, Form 22 is included. Standalone Form 22 starts at €450 + VAT, depending on complexity. Free 30-minute diagnostic →

Next steps for SMEs that haven't filed yet

• This week: confirm trial balance is closed and reviewed
• 22 days before deadline: validate Q07 (tax benefits) with full dossier
• 15 days before: simulate IRC + autonomous taxation to anticipate cash flow
• 5 days before: file Form 22 (don't wait for the last day — Tax Portal gets congested)
• After filing: schedule task to prepare IES (deadline July 15)

For companies without a Certified Accountant, or wanting a second opinion before filing, HVR offers technical Form 22 review in 5 working days.