Going independent in Portugal is refreshingly straightforward, but the tax system behind it has three moving parts that catch newcomers out: income tax (IRS), Social Security, and the choice between the simplified regime and organised accounting. This guide covers each, with 2026 rates, two worked examples and the calendar you must hit. Figures reflect the 2026 State Budget and the 2026 IAS (Indexante dos Apoios Sociais), fixed at €537.13. This is general information, not personal tax advice.
How self-employment works in Portugal
Self-employed workers in Portugal issue electronic invoices known as recibos verdes ("green receipts") through the Finanças portal, and their earnings fall under Category B of IRS. Before invoicing you file an abertura de atividade (free, online or at a tax office), pick your activity code, and choose how profit will be calculated:
- Regime simplificado (simplified regime): the default for gross annual income up to €200,000. You do not track real profit; a fixed coefficient decides how much of your income is taxable.
- Contabilidade organizada (organised accounting): compulsory above €200,000, optional below. You are taxed on real profit, deduct documented expenses, and need a certified accountant.
Most freelancers with low overheads are better off simplified: the deemed allowance usually exceeds their real costs.
The simplified regime and its coefficients
You are not taxed on all your turnover. A coefficient applied to gross income produces the taxable base, and the remainder is a deemed expense allowance. The coefficients are set by Article 31 of the IRS Code:
| Activity type | Coefficient | Share of income taxed |
|---|---|---|
| Professional services listed in Art. 151 CIRS (consultants, IT, designers, therapists, most freelancers) | 0.75 | 75% |
| Other service provision not specifically listed | 0.35 | 35% |
| Sale of goods, hotels, restaurants and beverages | 0.15 | 15% |
| Intellectual property, capital income, crypto mining | 0.95 | 95% |
| Services invoiced to a company you control | 1.00 | 100% |
A consultant on 0.75 with €40,000 of invoices therefore has a taxable base of €30,000: 25% of turnover is assumed to be costs, no receipts examined. Model your own figures with the Portugal simplified-regime calculator.
The 15% expense rule that catches people out
The 0.75 and 0.35 coefficients carry a condition that surprises almost every new freelancer. Fifteen percent of gross income must be backed by documented amounts, and any shortfall is added back onto taxable income (Art. 31, n.º 13 CIRS). Four things count towards it:
- An automatic specific deduction of €4,587.09 for 2026 (8.54 × IAS), granted with no paperwork.
- Mandatory Social Security contributions, to the extent they have not already been deducted elsewhere.
- Staff costs and rent on professional premises, plus 1.5% of the value of property used in the activity.
- Other running costs (software, equipment, supplies, professional fees, utilities), if the invoice carries your NIF and is classified on e-fatura as a business expense.
The takeaway that saves hours of worry: because the automatic deduction alone is €4,587.09, the rule cannot bite until gross service income passes roughly €30,580 (€4,587.09 divided by 0.15). Below that you never need a receipt; above it, contributions cover most of the gap.
A second benefit is widely missed: under Art. 31, n.º 2 CIRS, the part of your Social Security contributions that exceeds 10% of gross income is deducted directly from the coefficient-based taxable income.
IRS progressive rates for 2026
Once the coefficient sets your taxable base, the standard progressive IRS rates apply, the same scale employees use. For 2026 the bracket limits rose 3.51% for inflation and the marginal rates of bands 2 to 5 fell by 0.3 points. Nine bands run from 12.5% to 48% (Art. 68 CIRS):
| Band | Taxable income (€) | Marginal rate | Tax on the band (€) |
|---|---|---|---|
| 1 | Up to 8,342 | 12.5% | 1,042.75 |
| 2 | 8,342 to 12,587 | 15.7% | 666.47 |
| 3 | 12,587 to 17,838 | 21.2% | 1,113.21 |
| 4 | 17,838 to 23,089 | 24.1% | 1,265.49 |
| 5 | 23,089 to 29,397 | 31.1% | 1,961.79 |
| 6 | 29,397 to 43,090 | 34.9% | 4,778.86 |
| 7 | 43,090 to 46,566 | 43.1% | 1,498.16 |
| 8 | 46,566 to 86,634 | 44.6% | 17,870.33 |
| 9 | Over 86,634 | 48.0% | n/a |
Rates are marginal: only the slice inside each band is taxed at that band's rate. Cumulative tax at the top of band 5 is €6,049.71 and at the top of band 6 it is €10,828.56. A solidarity surcharge adds 2.5% on taxable income between €80,000 and €250,000 and 5% above €250,000 (Art. 68-A CIRS). Personal tax credits cut the final bill, so figures below are pre-credit.
Social Security for the self-employed
Social Security is separate from IRS and, at lower incomes, often the larger cost. Service providers pay 21.4%, but not on full turnover: the base is relevant income, which for services is 70% of gross. The effective bite is about 14.98% of everything you invoice.
| Item (2026) | Figure |
|---|---|
| IAS (reference index) | €537.13 |
| Contribution rate, service providers | 21.4% |
| Contribution rate, sole traders (ENI / EIRL) | 25.2% |
| Relevant income: services | 70% of gross |
| Relevant income: sale of goods | 20% of gross |
| Minimum monthly contribution | €20.00 |
| Maximum monthly base (12 × IAS) | €6,445.56 |
| Maximum monthly contribution | €1,379.35 |
| Exemption if you also have a job (average monthly relevant income below 4 × IAS) | €2,148.52 |
You file a quarterly declaration in January, April, July and October, and the monthly base is one third of the relevant income declared. Contributions are then paid monthly, between the 10th and the 20th of the following month. When declaring you may adjust the base up or down in steps of 5%, to a maximum of 25% (Segurança Social portal).
Two exemptions matter. Open an activity for the first time and you pay nothing for 12 months (IRS still applies). And if you also hold a salaried job with a different employer paying at least 1 × IAS a month, and average monthly relevant income from freelancing stays under €2,148.52, you owe nothing on the freelance side.
Worked examples: €50,000, €24,000 and year one
Example A: an IT consultant billing €50,000, coefficient 0.75, past the first-year relief.
- Coefficient base: 0.75 × €50,000 = €37,500.
- Social Security: 70% × €50,000 = €35,000 relevant income; 21.4% of that = €7,490 a year (about €624 a month).
- Art. 31 n.º 2: contributions above 10% of gross (€7,490 − €5,000) = €2,490 comes off the base, leaving €35,010.
- 15% test: €7,500 must be justified. The €5,000 of contributions not yet deducted counts (beating the €4,587.09 automatic figure), so only €2,500 of e-fatura invoices is needed.
- IRS before credits: €6,049.71 + (€35,010 − €29,397) × 34.9% = €8,009.
Total: about €15,499, or 31.0% of gross, before personal credits.
Example B: a designer billing €24,000, same coefficient, third year of activity.
- Coefficient base: €18,000. Social Security: 70% × €24,000 = €16,800; 21.4% = €3,595 a year (€299.60 a month).
- Contributions above 10% of gross: €3,595 − €2,400 = €1,195, so the base falls to €16,805.
- 15% test: €3,600 required, but the automatic €4,587.09 already exceeds it. No receipts needed, no add-back.
- IRS before credits: €1,709.22 + (€16,805 − €12,587) × 21.2% = €2,603.
Total: about €6,198, or 25.8% of gross, of which Social Security is 58%.
Year one is different again. With no Category B income in the previous five years, the coefficient is cut by 50% in your first tax year and 25% in the second, so 0.75 becomes 0.375, then 0.5625. Combined with the 12-month contribution exemption, the €24,000 designer shows a base of €9,000, IRS of about €1,146 and zero Social Security: under 5% of gross. The reduction is lost if you also earn employment or pension income. Set money aside regardless: the tax set-aside calculator fixes a percentage you can live with.
VAT, withholding tax and the 2026 tax calendar
VAT (IVA). Under Article 53 of the VAT Code you charge no VAT while annual turnover stays at or below €15,000, unchanged for 2026. Cross it by less than 25% and you file a declaração de alterações in January and charge VAT from the next year. Cross €18,750 and the change is immediate: the breaching invoice must already carry VAT, at 23% on the mainland (22% Madeira, 16% Azores).
Withholding (retenção na fonte). Clients with organised accounting hold IRS back at source: 23% for the professions listed in Art. 151 CIRS, 16.5% for intellectual property, 11.5% for other activities. You can claim exemption if expected annual Category B income is below €15,000 (Art. 101-B CIRS). It is a prepayment, not extra tax.
| Obligation | 2026 deadline |
|---|---|
| Quarterly Social Security declaration | Last day of January, April, July, October |
| Social Security contribution payment | 10th to 20th of the following month |
| VAT return (quarterly regime) | By the 20th of the 2nd month after quarter end; payment by the 25th |
| IRS payments on account (3 instalments) | 20 July, 20 September, 20 December |
| Annual IRS return (Modelo 3 + Anexo B) | 1 April to 30 June |
| IRS balance payment | By 31 August |
Payments on account (Art. 102 CIRS) total 65% of a formula based on tax paid two years earlier, which is why they never apply in your first two years. Any instalment below €50 is dropped. Late payment triggers interest plus a fine.
Simplified regime or organised accounting?
The simplified regime wins whenever provable costs are lower than the deemed allowance. On the 0.75 coefficient that allowance is 25% of turnover, so a consultant whose costs run at 10% of revenue stays simplified. A photographer with equipment, premises and staff eating 40% of revenue is usually better off with organised accounting, where real profit is taxed and losses carry forward 12 years.
Three things to weigh. It becomes compulsory once you exceed €200,000 in two consecutive years, or by more than 25% (above €250,000) in a single year, effective the following year. It costs money: an accountant typically charges €70 to €200 a month. And it brings tributações autónomas on cars and entertainment, charges absent from the simplified regime. To opt in voluntarily, do so in your start-of-activity declaration or by 31 March.
IFICI and IRS Jovem: two ways to pay less IRS
The old Non-Habitual Resident (NHR) regime is closed to new applicants and was replaced by IFICI (Incentivo Fiscal à Investigação Científica e Inovação), widely called NHR 2.0. It gives qualifying new residents a 20% flat IRS rate on eligible Portuguese employment and self-employment income for 10 years, plus exemption on most foreign-source income (pensions excluded). Eligibility is far narrower: you must be a new tax resident who was not resident in Portugal in the previous five years, never used NHR, and work in a qualifying high-value field such as scientific research, technology, higher education or a certified start-up. Applications are due by 15 January of the year following the year you become resident, and missing that date costs the whole decade.
IRS Jovem covers Category B as well as salaries and runs 10 years for taxpayers up to age 35: 100% exemption in year 1, 75% in years 2 to 4, 50% in years 5 to 7, 25% in years 8 to 10, capped at 55 × IAS, or €29,542.15 of exempt income in 2026. It cannot be stacked with IFICI, so run both numbers first.
Edge cases, common mistakes and record-keeping
This guide does not fit everyone. Non-residents with Portuguese-source Category B income are generally taxed at a flat 25%, with no coefficients and no bands. For a one-off job, an ato isolado lets you invoice without opening an activity, and Social Security is due only above 6 × IAS (€3,222.78 in 2026). If freelancing is a sideline to a salaried job, check the accumulation exemption first.
The expensive mistakes are predictable: forgetting that Social Security starts on month 13, just as the first-year cushion disappears; not classifying expenses on e-fatura, which silently triggers the 15% add-back; assuming the first-year coefficient reduction survives a salary; and ignoring the €15,000 VAT ceiling until an invoice pushes you past €18,750.
The habits that prevent them are simple. Open a separate account and move a third of every payment into it the day it lands. Register every business purchase with your NIF and classify it on e-fatura. Track cumulative turnover against both the €15,000 VAT line and the €200,000 regime line. Review annually whether organised accounting now beats the coefficient. If you are still comparing countries, the country tax comparison puts the numbers side by side, and unfamiliar terms sit in the tax glossary. Rates, coefficients and the IAS change every year, so confirm the figures before you file and use a certified accountant for anything non-standard.