It is estimated that hundreds of thousands of people work as self-employed professionals in Portugal. Whether as a primary occupation or a secondary source of income, working under the green receipt (recibos verdes) system remains an increasingly popular choice, largely due to the flexibility it offers.
However, being self-employed also comes with a range of tax and social security obligations that must be fulfilled to avoid penalties and fines.
In this updated 2026 guide, we explain the main rights and responsibilities of self-employed workers, the taxes they may have to pay, and the key deadlines they should be aware of.
What is a Self-Employed Worker?
A self-employed worker is an individual who carries out a professional activity independently, without an employment contract with an employer. Income is generally documented through the issuance of invoices, invoice-receipts, or electronic green receipts (recibos verdes).
When registering their activity with the Portuguese Tax Authority (Autoridade Tributária e Aduaneira), the individual is assigned a tax and social security framework that determines their obligations towards both the Tax Authority and the Portuguese Social Security system.
What are the main taxes for Self-Employed Workers?
Self-employed professionals should pay particular attention to two main taxes:
- VAT (Value Added Tax – IVA);
- Personal Income Tax (IRS).
Although both relate to business activity, they operate under different rules.
VAT: When is it mandatory to charge it?
Not all self-employed workers are required to VAT to their clients.
In many cases, it is possible to benefit from the VAT exemption provided under Article 53 of the Portuguese VAT Code, provided the legal requirements are met.
When covered by this exemption:
- VAT is not charged on invoices or green receipts;
- Periodic VAT returns are not required;
- VAT incurred on business expenses cannot be deducted.
Once the conditions for the exemption are no longer met, the self-employed professional must begin charging VAT to clients and submit the corresponding periodic VAT returns.
In mainland Portugal, the standard VAT rate remains 23%, although certain goods and services are subject to reduced or intermediate rates.
Before starting a business activity, it is therefore important to confirm which VAT regime applies to your specific circumstances.
Periodic VAT Returns
Self-employed workers operating under the standard VAT regime must submit periodic VAT returns through the Portuguese Tax Portal (Portal das Finanças).
Depending on annual turnover, VAT reporting may fall under one of the following regimes:
- Quarterly VAT regime – applicable to most self-employed professionals;
- Monthly VAT regime – mandatory for taxpayers whose annual turnover exceeds the legal threshold established by the Portuguese Tax Authority.
In addition to filing the VAT return, any VAT due must be paid within the deadlines established by the Tax Authority.
Do All Self-Employed Workers Have to Pay IRS?
One of the most common questions concerns Personal Income Tax (IRS).
Contrary to popular belief, there is no automatic exemption from IRS simply because your turnover is below a certain amount.
The amount of tax ultimately payable depends on several factors, including:
- Annual income earned;
- Tax-deductible expenses;
- The applicable tax regime;
- Family circumstances;
- Available tax deductions.
Even if you qualify for an exemption from withholding tax during the year, this does not mean you are exempt from submitting an annual IRS return or that no tax will ultimately be payable following the final tax assessment.
Withholding Tax
In certain situations, self-employed workers may qualify for an exemption from withholding tax, provided they meet the legal requirements.
Where withholding tax applies, part of the income is paid in advance to the State and treated as an advance payment of the IRS liability, which is reconciled when the annual tax return is submitted.
Annual IRS Tax Return
Every year, self-employed workers must submit an IRS tax return declaring the income earned during the previous calendar year.
Income from self-employment falls under Category B of the Portuguese Personal Income Tax system.
When completing the tax return, several factors may affect the final tax calculation, including deductible expenses, withholding tax already paid, and any applicable tax benefits.
Simplified Regime or Organised Accounting?
When registering a business activity, self-employed workers are placed under one of two tax regimes.
- Simplified Tax Regime
This is the regime applicable to the majority of self-employed professionals.
Under this system:
- Accounting requirements are considerably simpler;
- There is no legal obligation to appoint a Certified Accountant;
- Taxable income is calculated using statutory coefficients, although part of the business expenses may need to be substantiated.
For many professionals, this remains the simplest and most cost-effective option.
- Organized Accounting
The Organized Accounting Regime becomes mandatory when annual turnover exceeds the legal threshold for remaining under the Simplified Regime. It may also be chosen voluntarily.
Under this regime:
- Appointing a Certified Accountant is mandatory;
- Taxable profit is determined based on the accounting records of the business;
- A wider range of business expenses may be deducted.
The choice between the two regimes should be assessed individually, taking into account annual turnover, operating costs, and the nature of the business activity.
Social Security: What Are the Obligations?
In addition to tax obligations, self-employed workers are generally required to contribute to the Portuguese Social Security system.
In most cases, they must submit a quarterly income declaration, reporting the income earned during the previous three months.
The usual submission deadlines are:
- By 31 January;
- By 30 April;
- By 31 July;
- By 31 October.
The declared income is then used to calculate the social security contributions payable during the following months.
Certain legal exemptions exist, meaning that not every self-employed worker is required to submit quarterly declarations.
What Rights Do Self-Employed Workers Have?
Although they are not employees, self-employed workers are entitled to several social security benefits, provided they fulfil their contribution obligations.
These rights include:
- Sickness benefits;
- Parental benefits;
- Childcare assistance benefits;
- Invalidity protection;
- State retirement pension;
- Protection in certain situations involving the cessation of business activity.
Conclusion
Being self-employed offers greater independence and flexibility, but it also requires careful management of tax and social security obligations.
Understanding the rules relating to VAT, IRS, Social Security contributions, and your accounting framework is essential to avoid mistakes, comply with legal deadlines, and manage your business efficiently.
As Portuguese tax legislation changes frequently, seeking advice from a Certified Accountant is strongly recommended. Professional guidance can help ensure full compliance with your obligations while optimizing your tax position.
If you are planning to start a self-employed activity or would like clarification about your tax status, contact us today. Our team is ready to help you manage your business with confidence, security, and peace of mind.