Introduction to the Independent Worker Regime in Portugal

The independent worker regime in Portugal, commonly associated with "green receipts" (recibos verdes), requires registration with the Tax Authority and Social Security. In 2026, under the simplified regime, taxable income is determined by applying coefficients: 0.75 to the professional activities in the Article 151 CIRS table, 0.35 to other services and 0.15 to sales. The Social Security contribution is 21.4% on 70% of the relevant income. A VAT exemption applies to annual revenues up to €15,000. Obligations include filing the personal income tax (IRS) return, VAT returns (if applicable), and quarterly Social Security declarations.

By Hugo Velez Ribeiro, Certified Accountant (OCC nº 64356) · 31/07/2026

Operating as an independent worker in Portugal offers flexibility and autonomy but comes with a specific set of tax and social security responsibilities that differ substantially from those of employment. This guide aims to demystify the legal and tax framework, providing a clear roadmap for those starting or already engaged in self-employment. A correct understanding of the obligations towards the Tax and Customs Authority (AT) and Social Security (SS) is fundamental to ensure legal compliance and optimize the tax burden. The regime covers a wide range of professionals, from consultants and programmers to designers and doctors. The main distinction lies in the absence of an employment contract and, consequently, the professional's own responsibility for settling their taxes and contributions. This guide will cover the essential steps, from starting the activity to the ongoing management of tax obligations, including the choice between the simplified regime and organized accounting, the rules for Personal Income Tax (IRS), the Value Added Tax (VAT) framework, and Social Security contributions. Proper tax planning is crucial for the success and sustainability of any independent activity.

Starting Your Activity: The Step-by-Step Guide

The first formal step to becoming an independent worker is to submit a Declaration of Commencement of Activity to the Tax Authority. This procedure is mandatory and must be carried out before issuing any invoice or receipt. Currently, this process is done exclusively online through the Tax Authority's Portal (Portal das Finanças), and it is a free and immediate procedure.

Step-by-Step Guide to Starting Your Activity:

• Access the Portal das Finanças: Log in to the portal with your personal credentials (NIF and password).
• Navigation: Search for "Início de Atividade" (Start of Activity) and select the option to submit the declaration.
• Filling out the Declaration: The form will request several crucial pieces of information:
• CAE (Portuguese Classification of Economic Activities): You must choose the code that best describes your main activity. You can add up to one main CAE and 19 secondary ones. The choice of CAE is decisive as it influences the coefficient applied under the simplified regime.
• Start Date: The date you plan to begin your activity.
• Estimated Turnover: The amount you expect to invoice by the end of the calendar year. This estimate is important for your initial VAT classification. If your estimated annual turnover is less than €15,000 (art. 53(1) of the VAT Code, as amended by Decree-Law 35/2025), you can benefit from the VAT exemption regime under Article 53 of the VAT Code.
• IRS Regime: You must choose between the Simplified Regime and Organized Accounting. The default choice for new starters is the Simplified Regime, with Organized Accounting being mandatory only for gross annual income exceeding €200,000.
• VAT Regime: Based on your estimated turnover and the nature of your activity, you will be placed in the exemption regime (Article 53 of the VAT Code) or the normal regime (monthly or quarterly). Some activities, such as medical services, are exempt under Article 9 of the VAT Code, regardless of turnover.
• Submission: After reviewing all the data, submit the declaration. You will be immediately registered as an independent worker.

After submitting the start of activity declaration, the Tax Authority automatically notifies Social Security. However, the worker is only obliged to make Social Security contributions after 12 months from the start of the activity. The start of activity declaration must be submitted electronically on the Portal das Finanças before issuing the first invoice-receipt. This is a fundamental administrative step that formalizes your activity before the Portuguese state and defines your initial tax framework.

Simplified Regime vs. Organized Accounting: Which to Choose?

The choice between the simplified regime and organized accounting is one of the most important decisions for an independent worker, with a direct impact on the calculation of tax due and on reporting obligations. The choice is made at the time of starting the activity or through a declaration of changes submitted by the end of March of the year for which the change is intended.

Simplified Regime

This is the standard regime for most independent workers with a gross annual turnover of less than €200,000. Its main feature is the determination of taxable income by applying pre-defined coefficients to gross income, as stipulated in Article 28 of the Personal Income Tax Code (CIRS). It is not necessary to prove expenses up to a certain limit.

• Coefficients: The 0.75 coefficient applies to the professional activities specifically listed in the Article 151 CIRS table (Article 31(1)(b)): the Tax Authority assumes that 75% of that income is profit and 25% are expenses. Other services use 0.35 (Article 31(1)(c)), and sales of goods and products, restaurants, beverages and hotel activities use 0.15 (Article 31(1)(a)).
• Additional Deduction: To justify the 25% expense presumption, the taxpayer must have activity-related expenses totaling 15% of their gross income. Otherwise, the difference is added to the taxable income.

Organized Accounting

Organized accounting is mandatory for independent workers with gross annual income exceeding €200,000, or optional for those below this threshold. In this regime, taxable profit is determined by the difference between the income earned and the expenses actually incurred and documentarily proven. It is mandatory to hire a Certified Accountant (CC), who will be responsible for organizing the accounts and submitting tax returns.

Comparative Practical Case

Imagine an IT consultant with a gross annual income of €60,000 and proven expenses of €18,000 (software, computer, office rent, etc.).

• In the Simplified Regime:
• Gross Income: €60,000
• Coefficient: 0.75
• Initial Taxable Income: €60,000 * 0.75 = €45,000
• Presumed Expenses: €60,000 * 0.25 = €15,000
• To justify this presumption, you need 15% in expenses (€60,000 * 0.15 = €9,000). Since you have €18,000 in expenses, you meet the requirement.
• Income Subject to IRS: €45,000
• In Organized Accounting:
• Income: €60,000
• Deductible Expenses: €18,000
• Income Subject to IRS (Taxable Profit): €60,000 - €18,000 = €42,000

In this example, organized accounting would be more advantageous, resulting in a lower taxable income by €3,000. The decision should weigh the additional cost of the Certified Accountant against the tax savings. In the simplified regime, for the professional activities in the Article 151 table it is presumed that 75% of income is net income and the remaining 25% expenses inherent to the activity; for other services the split is 35% and 65%. An annual review of this option is good tax planning practice.

IRS Taxation: How to Calculate and Pay

IRS (Personal Income Tax) is the main tax obligation for an independent worker. The calculation of the tax due depends on the chosen regime (simplified or organized accounting) and the income earned. Category B income (business and professional income) is aggregated with other income (if any, such as salaries or rents) and subject to progressive IRS rates.

Calculation in the Simplified Regime

As mentioned, taxable income is determined by applying a coefficient. After determining the taxable income (e.g., 75% of gross income), this amount is aggregated and subject to IRS rates. There is an important detail: to justify the full 25% automatic deduction (for activities in the Article 151 table), the taxpayer must have expenses registered in the e-fatura portal under their name (with NIF) that correspond to 15% of the gross income. If the expenses are lower, the difference is added to the taxable income. For example, if you invoiced €40,000, the presumed expenses are €10,000 (25%). To justify them, you need €6,000 (15%) in registered expenses. If you only have €4,000, the missing €2,000 will be added to your taxable income.

Withholding Tax

When an independent worker provides services to an entity with organized accounting (a company, for example), they are subject to IRS withholding tax. The client entity is responsible for withholding a percentage of the amount paid and delivering it to the State. The withholding rates vary according to the nature of the activity, as per Article 101 of the CIRS:

• 23%: Professional activities specifically listed in the Article 151 table (e.g., consultants, lawyers, trainers), Article 101(1)(b) as amended by Law 45-A/2024.
• 20%: Category B income of taxpayers covered by Article 58-A of the Tax Benefits Statute (IFICI, the scientific research and innovation incentive), Article 101(1)(d).
• 16.5%: For income from intellectual or industrial property or the provision of information.
• 11.5%: Other services, outside the Article 151 table (Article 101(1)(c)). Commercial and industrial activities have no withholding rate.

The withholding tax rate is 11.5% of the base value of the receipt for services outside the Article 151 table, and 23% for activities in the table (Article 101(1) of the CIRS). Withholding tax is an advance payment of the tax that will be due at the end of the year. There is an exemption from withholding if the worker does not expect to exceed €15,000 in income for the year (art. 101-B(1)(a) of the CIRS, by reference to art. 53 of the VAT Code).

Practical Case of IRS Calculation

A consultant (code 1320 of the Article 151 table), under the simplified regime, invoiced €40,000 in 2025 to companies, with a 23% withholding tax. They have registered expenses on e-fatura of €5,000.

• Gross Income: €40,000
• Withholding Tax: €40,000 * 23% = €9,200 (paid to the State by the client)
• Taxable Income (initial): €40,000 * 0.75 = €30,000
• Expense check: Needs 15% of €40,000 = €6,000. Only has €5,000.
• Addition to income: €6,000 - €5,000 = €1,000
• Final Taxable Income: €30,000 + €1,000 = €31,000
• This €31,000 amount will be aggregated and subject to IRS rates. Assuming the total tax assessed is €6,500, the final tax to pay (or receive) will be: €6,500 (tax assessed) - €9,200 (withholdings) = -€2,700. In this case, they would get a refund of €2,700.

Payments on Account

If, in one year's IRS return, the tax assessed is higher than the sum of withholdings, the independent worker is obliged to make three payments on account the following year (in July, September, and December), anticipating the tax for the current year. The calculation is based on the tax assessed in the previous year.

VAT (Value Added Tax): Obligations and Exemptions

Value Added Tax (VAT) is a consumption tax levied on most supplies of goods and services. For independent workers, the VAT framework is a central issue to manage from the start of the activity.

Exemption Regime

The main rule to know is the exemption regime provided for in Article 53 of the VAT Code (CIVA). This regime applies to independent workers who, in the previous calendar year, did not exceed a certain turnover threshold. Since January 1, 2025, the VAT exemption threshold has been €15,000 (art. 53(1) of the VAT Code, as amended by Decree-Law 35/2025); in 2024 it was €14,500. Under this regime, the professional does not charge VAT on their invoices and, in turn, cannot deduct the VAT incurred on their expenses. If, during a year, the turnover exceeds this threshold, the worker is obliged to submit a declaration of changes on the Portal das Finanças in January of the following year, moving to the normal VAT regime from February.

Normal VAT Regime

Independent workers who do not fall under the exemption regime (or who opt out of it) are subject to the normal VAT regime. This implies:

• Charging VAT: Adding the corresponding VAT rate to the value of their services or goods. The rates in mainland Portugal are 23% (standard rate), 13% (intermediate rate), and 6% (reduced rate).
• Deducting VAT: They can deduct the VAT incurred on activity-related expenses (e.g., acquisition of office supplies, software, accounting services).
• Submitting the Periodic VAT Return: This return is used to calculate the tax to be paid to the State (VAT charged - VAT deductible) or the credit to be received. The frequency can be:
• Quarterly: For those with an annual turnover of less than €650,000. The submission is due by the 20th of the second month following the quarter.
• Monthly: Mandatory for those exceeding €650,000 annually, or optional. The submission is due by the 20th of the second month following the month in question.

Practical Case of VAT

A marketing consultant under the normal quarterly regime invoices €5,000 for services in a quarter. During the same period, she had expenses with VAT amounting to €800 (input VAT of €184 at a 23% rate).

• VAT Charged (to the client): €5,000 * 23% = €1,150
• Deductible VAT (paid on expenses): €184
• VAT to be paid to the State: €1,150 - €184 = €966

This amount of €966 must be paid to the State by the deadline for submitting the respective quarterly return. It is crucial to note that certain activities, such as medical and training services, are exempt from VAT under Article 9 of the VAT Code, regardless of turnover. Correctly identifying these exemptions is vital.

Social Security: Contributions and Social Protection

Registration with Social Security (SS) is automatic after starting the activity, but the obligation to pay only begins 12 months after that date. Contributions guarantee access to a set of social protections, such as sickness benefit, parental leave, unemployment benefit (under specific conditions), and old-age pension.

Contribution Base and Rate

The contribution system for independent workers is based on quarterly income declarations. Every quarter, the worker must declare the income earned in the previous quarter.

• Quarterly Declaration: Must be submitted by the last day of January, April, July, and October, reporting the income of the previous three months.
• Contribution Base: The amount on which the contribution is levied is determined differently depending on the nature of the income. According to Article 134 of the Code of Contributory Regimes, the contribution base corresponds to:
• 70% of the total value of services provided.
• 20% of the value of sales of goods and products.
• The monthly value of the contribution base corresponds to 1/3 of the amount calculated for the quarter.
• Contribution Rate: The rate to be applied to the contribution base is 21.4%.
• Limits: There are minimum and maximum contribution limits. The minimum monthly contribution is €20, even if there is no income. The maximum limit of the contribution base is 12 times the value of the Social Support Index (IAS).

The contribution base for Social Security corresponds to 70% of the relevant income for service providers, according to Article 134 of the Code of Contributory Regimes.

Practical Case of Contribution Calculation

A programmer invoiced €9,000 in the first quarter of the year (January to March). In April, they will have to submit the quarterly declaration.

• Quarterly Income: €9,000 (service provision)
• Relevant Income: €9,000 * 70% = €6,300
• Monthly Contribution Base (for the next 3 months): €6,300 / 3 = €2,100
• Monthly Contribution to Pay (in May, June, and July): €2,100 * 21.4% = €449.40

The worker has the option to adjust the contribution base by +/- 25% (in 5% increments), which allows managing the monthly contribution amount according to income fluctuations. It is important to note that a lower contribution will also result in lower social benefits in the future. Workers who also have an employment contract, and whose monthly salary is equal to or greater than the IAS value, may be exempt from contributing to SS as independent workers, provided they meet certain conditions.

Invoicing and Green Receipts: Rules and Best Practices

Issuing invoicing documents is a central obligation for the independent worker. The term "green receipts" (recibos verdes) popularly refers to documents issued through the Portal das Finanças, but the legal framework is broader, including the use of certified software.

Issuing on the Portal das Finanças

The most common and free method for issuing invoices is through the Portal das Finanças. The system allows the issuance of three main types of documents:

• Invoice (Fatura): A document that records the transfer of goods or provision of services. It must be issued at the time of the transaction or up to the 5th working day following it. It does not imply receipt of payment.
• Receipt (Recibo): A document that proves the actual receipt of the value. It is only issued after payment.
• Invoice-Receipt (Fatura-Recibo): The most used document, which serves as both an invoice and a receipt. It is issued when the service provision and payment occur simultaneously or on a very close date. This is the so-called "green receipt".

Step-by-Step Guide to Issuing an Invoice-Receipt:

1. Access the Portal das Finanças > Faturas e Recibos Verdes > Emitir.
2. Select the document type (Fatura-Recibo).
3. Enter the date of the service provision and the client's data, including NIF, name, and address.
4. Describe in detail the service provided or the goods sold.
5. Enter the base amount (before taxes).
6. Select the applicable VAT regime (e.g., "IVA - regime de isenção [art. 53.º]" or the corresponding VAT rate).
7. Indicate the IRS base (usually 100% of the value) and the withholding tax regime (e.g., "Sem retenção - art. 101.º-B, n.º1, al. a) e b), do CIRS" for those invoicing less than €15,000 annually, or the applicable withholding rate).
8. Confirm and issue. The document becomes available as a PDF to be sent to the client.

Certified Invoicing Software

As an alternative to the Portal das Finanças, independent workers can use invoicing software certified by the Tax Authority. The use of certified software becomes mandatory, under the terms of Article 3 of Decree-Law No. 28/2019, for independent workers who, in the previous year, had income exceeding €50,000 (if under the simplified regime) or for all those in organized accounting. This software automates the issuance of invoices and ensures the communication of invoice elements to the AT through the SAFT-PT file (Standard Audit File for Tax Purposes - Portuguese version). The monthly SAFT communication must be made by the 5th of the month following the invoice issuance. The communication of the SAFT(PT) file to the AT is mandatory by the 5th of the following month for all users of certified invoicing software.

High-Value-Added Activities and the Tax Regime for former NHRs

Portugal has created specific tax incentives to attract qualified professionals in certain areas considered to be of high added value. Although the popular Non-Habitual Resident (NHR) regime ended for new applicants from 2024, its benefits for those who already held it remain, and a new tax incentive for scientific research and innovation has been created. The list of high-value-added activities remains relevant.

High-Value-Added Activities

The list of these activities is defined in Ordinance No. 230/2019, of July 23, and includes professions such as:

• Architects, engineers, and similar technicians.
• Visual artists, actors, and musicians.
• Auditors and tax consultants.
• Doctors and dentists.
• University professors.
• Information and Communication Technology (ICT) specialists, such as programmers, consultants, and IT designers.
• Researchers.
• Company directors and managers.

The classification of an activity as being of high added value, according to Article 151 of the CIRS, is crucial for accessing certain tax benefits. Professionals engaged in high-value-added activities, as per Article 151 of the CIRS, could, under the NHR regime, benefit from a flat IRS rate of 20%.

Relevance in the Simplified Regime

Anyone starting an activity gets a benefit in the simplified regime. In the tax period in which the activity starts, the 0.75 coefficient is reduced by 50%, to 0.375, and in the following period by 25%, to 0.5625 (Article 31(10) of the CIRS), provided no Category A or H income is earned in those periods. The reduction does not apply to anyone who ceased activity less than five years earlier (Article 31(11)), and it is not exclusive to these activities: the 0.35 coefficient for other services is reduced too.

Practical Case

A software engineer starts an activity as an independent worker in 2025. Their activity is on the high-value-added list. In their first year, they invoice €50,000.

• Calculation of Taxable Income (1st year):
• Gross Income: €50,000
• Reduced Coefficient: 0.375
• Income Subject to IRS: €50,000 * 0.375 = €18,750
• Comparison with the normal regime:
• Normal Coefficient: 0.75
• Income Subject to IRS: €50,000 * 0.75 = €37,500

The benefit results in a drastic reduction of the income subject to tax, representing significant tax savings in the first year of activity and, to a lesser extent, in the second (coefficient 0.5625). This incentive underscores the importance of checking if your activity falls into this list and meeting the requirements for its application. Consulting a tax specialist can be decisive in optimizing these benefits, especially in the context of the new rules that succeeded the NHR. For more information on tax optimization, check our consulting plans.

Common Errors and Tax Planning for Independent Workers

The tax management of an independent activity can be complex, and some errors are recurrent. Avoiding them through careful planning is essential for the financial health of the business and to avoid fines and late payment interest.

Common Errors to Avoid

1. Not Submitting Quarterly Social Security Declarations: This is one of the most common and serious errors. Failure to submit, even in quarters with no income, results in fines and the default setting of a contribution base, often higher than the actual one.
2. Exceeding the VAT Exemption Threshold and Not Changing Regimes: Many independent workers do not monitor their cumulative turnover. By exceeding €15,000 (art. 53(1) of the VAT Code, as amended by Decree-Law 35/2025) in a year, they become obliged to charge VAT the following year. Failure to submit the declaration of changes and to start charging VAT leads to the official assessment of the tax by the AT, plus interest and fines.
3. Ignoring the Need for Expenses for the Simplified Regime: Not associating expenses with the NIF on the e-fatura portal to justify the 15% of gross income results in an unnecessary increase in the IRS taxable base. It is essential to always ask for an invoice with NIF for all activity-related expenses.
4. Inadequate Choice Between Simplified Regime and Organized Accounting: Remaining in the simplified regime when real and deductible expenses far exceed the presumed 25% can lead to paying more tax than necessary. An annual simulation is crucial.
5. Confusing Deadlines: Tax obligations have strict deadlines (VAT submission, payments on account, IRS return, SS declarations). Failure to meet any of these deadlines results in penalties.

Tax Planning Strategies

• Annual Review of the Tax Regime: Before March 31 of each year, re-evaluate if the simplified regime is still the best option. Calculate your taxable profit under both scenarios (simplified vs. organized accounting) based on the previous year's data.
• Optimization of Deductible Expenses: Keep a rigorous record of all activity-related expenses. In organized accounting, this is straightforward. In the simplified regime, it ensures you reach the 15% threshold and avoid penalties.
• Contributing to a PPR (Pension Savings Plan): Contributions to a PPR are one of the few remaining tax credits in IRS. An independent worker can deduct 20% of the invested amount, with limits that vary with age (e.g., up to €400 for those under 35).
• Cash Flow Management: Set aside funds for tax payments. A good practice is to reserve a percentage of each invoice received (e.g., 25-30%) in a separate account to cover future IRS, VAT, and Social Security obligations.
• Professional Consultation: The Portuguese tax system is complex and constantly changing. Investing in professional tax consulting is not a cost, but an investment that can generate significant savings and ensure legal compliance.

The submission of the quarterly declaration to Social Security is mandatory even for independent workers with no income in a given quarter. Omitting this obligation can result in fines and the application of default contributions.

Sources and Legal References

• Personal Income Tax Code (CIRS): Decree-Law No. 442-A/88, of November 30.
• Article 28 of CIRS: Rules for determining taxable income under the Simplified Regime.
• Article 101 of CIRS: Withholding tax rates for Category B.
• Article 151 of CIRS: Table of activities referred to in Article 3(2).
• Value Added Tax Code (CIVA): Decree-Law No. 394-B/84, of December 26.
• Article 9 of CIVA: Exemptions on domestic transactions (e.g., medical services, training).
• Article 53 of CIVA: Special exemption regime.
• Code of Contributory Regimes of the Social Security System: Law No. 110/2009, of September 16.
• Article 134 of the Code of Contributory Regimes: Determination of the relevant income of independent workers.
• Ordinance No. 230/2019, of July 23: Defines the high-value-added activities for IRS purposes.
• Decree-Law No. 28/2019, of February 15: Regulates invoicing obligations.