The Single Social Tax (TSU) in 2026 remains at 34.75% under the general regime for employed persons: 23.75% borne by the employer and 11% deducted from the employee. Managers and directors with management functions pay the same rate, although with a minimum contribution base of €537.13 (1 IAS). For self-employed workers, the rate is 21.4%, and for Sole Proprietors (ENI) it is 25.2%. The main new features for 2026 are procedural: the introduction of the new contribution cycle, which replaces the Monthly Remuneration Statement (DMR) with an automatic Social Security assessment, and the extension of the payment deadline for contributions until the 25th of the following month. Additionally, the Social Support Index (IAS) is updated to €537.13, impacting various contribution and exemption thresholds.
What is TSU and its legal framework in Portugal for 2026?
The Single Social Tax (TSU), formally designated as Social Security contributions, constitutes a fundamental pillar of the social protection system in Portugal. It is a mandatory contribution levied on employment income and aims to finance a wide range of social benefits. These include, but are not limited to, retirement and invalidity pensions, unemployment benefit, sickness benefit, parental benefit, and other parental protection benefits, as well as social support in situations of economic hardship.
Under the general regime for employed persons, the TSU is jointly borne by the employer and the employee. The responsibility for withholding and remitting the total contributions to Social Security lies with the employer, who withholds the employee's portion at the time of payroll processing. This mechanism ensures the effective collection of funds necessary for the system's operation.
Contribution rates are established by specific legislation, namely the Code of Contributory Regimes of the Social Security System, approved by Law no. 110/2009, of 16 September, and its subsequent amendments. For the year 2026, the State Budget (Law no. 73-A/2025, of 30 December) did not introduce changes to the current contribution rates. The innovations for 2026 focus essentially on procedural aspects and the update of values indexed to the Social Support Index (IAS), which amounts to €537.13.
It is crucial to note that the TSU is not merely a tax on labour; it is a contribution that confers rights. Regular payment of these contributions guarantees workers and their beneficiaries access to various social benefits in times of need, functioning as a social safety net.
Objectives and Funding of Social Security
The Portuguese Social Security system, largely funded by the TSU, has the following main objectives:
- Protection in old age and invalidity: Through the granting of pensions.
- Unemployment protection: With the granting of unemployment benefits.
- Sickness and parental protection: Ensuring benefits that cover periods of labour inactivity due to health reasons or family responsibilities.
- Dependency protection: Support for people in situations of dependency.
- Family protection: Through family allowances and other benefits.
The system's funding is predominantly contributory, i.e., based on contributions from workers and employers. This intergenerational and interprofessional solidarity is the basis of the Portuguese Social Security model.
TSU Rates in 2026: A Detailed Overview
The TSU rates for 2026, as provided for in current legislation and without changes by the 2026 State Budget, remain as follows for the various categories of contributors:
| Contributor Category | Employer | Employee | Total |
|---|---|---|---|
| Employed persons (general regime) | 23.75% | 11% | 34.75% |
| Managers and directors (with management functions) | 23.75% | 11% | 34.75% |
| Members of statutory bodies without management functions | 20.3% | 9.3% | 29.6% |
| Self-employed workers (general rule) | — | 21.4% | 21.4% |
| Sole Proprietors (ENI) and holders of EIRL | — | 25.2% | 25.2% |
| Contracting entities (economic dependence >50% and ≤80%) | 7% | — | 7% |
| Contracting entities (economic dependence >80%) | 10% | — | 10% |
It is important to highlight the distinctions between the various categories:
- Employed persons (general regime): These are the majority of workers, subject to the full rate of 34.75%. The employer bears 23.75% and the employee 11%.
- Managers and directors with management functions: The same rate as the general regime (34.75%) applies to these, as they have benefited from unemployment protection since 2011. The minimum contribution base for these contributors is 1 IAS (€537.13 in 2026), as per Article 46 of the Code of Contributory Regimes.
- Members of statutory bodies without management functions: The rate for this category is lower (29.6%), as their scope of social protection is more limited, not including, for example, unemployment benefit. This distinction is fundamental and is provided for in Article 63 of the Code of Contributory Regimes.
- Self-employed workers: These professionals bear the full contribution (21.4%), calculated on a contribution base assessed quarterly. The contribution base is defined in Article 162 of the Code of Contributory Regimes.
- Sole Proprietors (ENI) and holders of Individual Limited Liability Establishments (EIRL): The rate of 25.2% reflects a specificity of their contributory framework.
- Contracting entities: These contributions apply when there is a strong economic dependence of a self-employed worker on a single entity. The rates of 7% or 10% are a mechanism to mitigate precariousness and ensure some social protection. The criteria for applying these rates are defined in Article 157 of the Code of Contributory Regimes.
Practical Examples of TSU Calculation in 2026
To illustrate the impact of TSU, let's look at some examples with real salaries, considering a 14-month regime (12 monthly salaries + holiday allowance + Christmas bonus).
Example 1: Employee with a Gross Salary of €1,000
Consider an employee with a gross monthly salary of €1,000.
| Gross Monthly Salary | Employer TSU (23.75%) | Employee Deduction (11%) | Total SS/Month | Monthly Cost to Company (Salary + TSU) |
|---|---|---|---|---|
| €1,000 | €237.50 | €110.00 | €347.50 | €1,237.50 |
Annual Calculation (14 months):
- Annual Gross Salary: €1,000 * 14 = €14,000
- Annual Employer TSU: €237.50 * 14 = €3,325
- Annual Employee Deduction: €110.00 * 14 = €1,540
- Total Annual TSU: €3,325 + €1,540 = €4,865
- Total Annual Cost to Company: €14,000 (salaries) + €3,325 (employer TSU) = €17,325
This example demonstrates that the real cost of an employee to the company is significantly higher than the gross salary, due to the employer's TSU. It is important to note that this calculation does not include other charges such as accident insurance, meal allowance, occupational medicine costs, among others, which can be consulted in our guide how much an employee costs the company.
Example 2: Manager with Minimum Contribution Base
A manager who, for example, declares remuneration of €400, but whose minimum contribution base is the IAS (€537.13 in 2026).
- Minimum Contribution Base: €537.13
- Employer TSU (23.75%): €537.13 * 0.2375 = €127.61
- Manager Deduction (11%): €537.13 * 0.11 = €59.08
- Total Monthly TSU: €127.61 + €59.08 = €186.69
In this case, even if the effective remuneration is lower, contributions are calculated on the legal minimum base. This rule is provided for in Article 46 of the Code of Contributory Regimes, which establishes that the contributory base for managers and directors cannot be less than the IAS value.
Example 3: Self-Employed Worker with Quarterly Income of €3,000
A self-employed worker who provides services and has a gross income of €3,000 in a quarter (e.g., January, February, March).
- Gross Quarterly Income: €3,000
- Contribution Base (70% of income): €3,000 * 0.70 = €2,100 (as per Article 162, no. 1, paragraph a) of the Code of Contributory Regimes)
- Monthly Contribution Base: €2,100 / 3 = €700
- Self-Employed TSU (21.4%): €700 * 0.214 = €149.80 per month
This amount of €149.80 will be the monthly contribution due for the months of April, May, and June, resulting from the quarterly income declaration made in April. It is possible to adjust this base by 25% up or down, in 5% intervals, as per Article 163 of the Code of Contributory Regimes.
Managers and Directors: Specifics of the Contribution Base
The situation of company managers and directors is a particular point of attention within the scope of TSU. Although the overall rate is the same as for employed persons (34.75%), the contributory base has specific rules, as per Article 46 of the Code of Contributory Regimes.
The contribution base generally corresponds to the remuneration actually received. However, there is a minimum limit: this base cannot be less than the value of the Social Support Index (IAS). In 2026, with the IAS set at €537.13, this means that even if a manager is not remunerated or receives a lower amount, Social Security requires contributions on at least €537.13 per month. This represents a minimum monthly contribution of €186.69 (34.75% of €537.13).
There are, however, exceptions to this rule. One of the most common occurs when the manager combines their activity with another professional activity already subject to Social Security contributions on an amount equal to or greater than 1 IAS. In these cases, the exemption from the minimum base may be applicable, but each situation must be carefully analysed and validated with a certified accountant or directly with Social Security, to avoid non-compliance and penalties.
Unemployment protection for effective managers and directors, introduced in 2011, justifies the application of the full rate, as these contributors have access to a wider range of social benefits.
Self-Employed Workers and Contracting Entities in 2026
The regime for self-employed workers (TI) is one of the most particular, especially regarding the determination of the contribution base and payment deadlines. The rate of 21.4% for most TIs and 25.2% for ENI and EIRL holders remains unchanged in 2026.
The contribution base for self-employed workers is assessed quarterly, based on income declared to Social Security Direta in the previous three months. For most service provisions, the contribution base corresponds to 70% of the value of services rendered. For the production and sale of goods, as well as hospitality and catering activities, the base is 20% of the sales volume. This quarterly base is divided by three to obtain the monthly base on which the contribution is levied. The income declaration must be submitted by the last day of January, April, July, and October.
Key points to consider in 2026 for self-employed workers:
- Minimum contribution: Even in the absence of income in a given quarter, if there is an obligation to contribute, there is a minimum contribution of €20/month. This rule aims to ensure a minimum level of system sustainability and protection for the TI themselves.
- First registration: Anyone starting activity as a self-employed worker for the first time is only registered on the 1st day of the 12th month following the start of activity. In practice, this means a period of about 12 months without an obligation to contribute, but also without any social protection during that period. This initial exemption is provided for in Article 157-A of the Code of Contributory Regimes.
- Accumulation with employed work: Legislation provides for situations of exemption from contributions as a self-employed worker when there is accumulation with employed work. This exemption applies if the average monthly independent income for the quarter is less than 4 times the IAS (€2,148.52 in 2026), if the employed salary is at least 1 IAS (€537.13), and if the activities are provided to different entities. This exemption is detailed in Article 157, no. 2, paragraph b) of the Code of Contributory Regimes.
- Contracting Entities: Entities that benefit from more than 50% of a self-employed worker's annual activity may be required to pay an additional contribution. If economic dependence is greater than 50% and equal to or less than 80%, the rate is 7%. If it is greater than 80%, the rate increases to 10%. This obligation only applies if the self-employed worker's annual income exceeds 6 times the IAS (€3,222.78 in 2026). This measure aims to combat "false green receipts" and ensure greater social protection. Article 157 of the Code of Contributory Regimes establishes the criteria for this contribution.
Procedural Changes and Payment Deadlines in 2026
The year 2026 brings important new procedural features regarding the assessment and payment of Social Security contributions. These changes aim to simplify and modernise the process, reducing the administrative burden for companies.
New Contribution Cycle: The End of the DMR
The main change is the introduction of the new contribution cycle, established by Decree-Law no. 127/2025, in force since 1 January 2026. This diploma replaces the traditional Monthly Remuneration Statement (DMR) with a system of automatic assessment of contributions by Social Security itself.
Under the new model, employers no longer have the responsibility to calculate and submit the DMR monthly. Instead, Social Security, based on worker admission and termination data and communicated remuneration (through remuneration files, for example), automatically assesses the amounts due. Employers will have a period (until the 20th of the following month) to validate or, if necessary, correct the amounts assessed by Social Security. After validation, payment must be made by the 25th of the following month.
For 2026, adherence to this new model is voluntary and phased for employers. However, from 1 January 2027, the new contribution cycle will become mandatory for all employers. This transition represents an initial challenge, but it is expected to bring greater efficiency and a lower probability of administrative errors in the long term.
The communication of worker admissions also undergoes changes: it must now be made before the start of the employment contract, and not 24 hours before, as was the general rule. This flexibility aims to adapt to the reality of companies.
Payment Deadlines
| Payment Regime | Payment Deadline | Applies to |
|---|---|---|
| Classic Regime | 10th to 20th of the following month | Employers who have not adhered to the new model in 2026 and self-employed workers |
| New Contribution Cycle (DL no. 127/2025) | 1st to 25th of the following month | Employers who voluntarily adhered in 2026; mandatory for all from 1/1/2027 |
The extension of the payment deadline until the 25th (for companies in the new cycle) is a measure aimed at providing greater financial flexibility to companies, allowing for better treasury planning.
Other Relevant News in 2026
- IAS Update: The Social Support Index (IAS) is updated to €537.13 (Ordinance no. 480-A/2025/1), an increase of 2.8% compared to €522.50 in 2025. This update directly impacts all indexed thresholds and values, such as the minimum base for managers, exemption criteria for self-employed workers, and values for applying contracting entity contributions.
- Productivity bonuses without TSU and IRS: Article 96 of the 2026 State Budget introduces a measure to incentivise productivity. Productivity bonuses, profit-sharing, and balance sheet gratuities paid in 2026 may be excluded from the Social Security contribution base (and exempt from IRS), up to a limit of 6% of the worker's annual basic remuneration. For this, it is necessary that these bonuses are voluntary, not regular in nature, and that the company has granted eligible salary increases of at least 4.6%. This measure aims to encourage the sharing of results with workers and boost productivity.
- Unchanged rates: It is fundamental to reiterate that, despite the procedural changes and the IAS update, Social Security contribution rates have not undergone any alteration compared to 2025.
Common Errors to Avoid in TSU Management in 2026
TSU management can be complex, and errors can lead to fines, late payment interest, and problems with Social Security. Here are some of the most common errors to avoid:
- 1. Failure to communicate admissions/terminations in a timely manner: Admissions must be communicated before the start of the employment contract and terminations within the legal deadline. Non-compliance with these deadlines can result in fines and problems in the assessment of contributions and access to social benefits.
- 2. Errors in calculating the contribution base: Calculating TSU on an incorrect contribution base, either due to an error in the declared remuneration or by not considering the specific rules for managers or self-employed workers, is a frequent error that can lead to under or over-contributions.
- 3. Lack of knowledge of the specifics of self-employed workers: The rules for self-employed workers are complex (contribution base, quarterly declarations, exemptions, minimum contribution). Non-compliance with these specifics can result in debts to Social Security or loss of rights.
- 4. Not considering the updated IAS: The IAS is a dynamic value that affects various thresholds. Not using the 2026 value (€537.13) for the minimum base of managers or independent exemption criteria can lead to calculation errors.
- 5. Failure to adapt to the new contribution cycle: The transition to the new automatic assessment model requires companies and accountants to adapt to the new validation and communication procedures. Failure to adapt can lead to delays and failures in fulfilling obligations.
- 6. Ignoring the rules for contracting entities: Companies that hire self-employed workers with strong economic dependence must be aware of their obligation to contribute as a contracting entity. Omission of this contribution can result in fines and interest.
- 7. Failure to communicate productivity bonuses for exemption: To benefit from the TSU and IRS exemption on productivity bonuses, it is essential to comply with all requirements established in the OE2026 and correctly communicate these values, ensuring that they are not considered for the contributory base.
Conclusion and Practical Recommendations
The management of the Single Social Tax in 2026, although with unchanged rates, presents important challenges due to significant procedural changes, particularly the implementation of the new contribution cycle. For companies and professionals, it is imperative to stay updated and adapt their procedures to ensure compliance with legal obligations and avoid penalties.
Practical recommendations:
- Stay informed about the new contribution cycle: Companies should familiarise themselves with Decree-Law no. 127/2025 and prepare for the transition to automatic Social Security assessment. If voluntary adherence in 2026 is feasible, it is advisable to do so to test the system before it becomes mandatory in 2027.
- Update your human resources management systems: Ensure that your payroll and personnel management software is updated to reflect the new rules and the IAS value for 2026.
- Review contribution bases: Confirm that the contribution bases for managers, self-employed workers, and other categories are correctly applied, taking into account the new IAS value and respective exceptions.
- Take advantage of productivity bonus exemptions: Evaluate the possibility of implementing a productivity bonus plan that meets the requirements of OE2026 to benefit from the TSU and IRS exemption, incentivising your employees and optimising costs.
- Consult an expert: Given the complexity of Social Security legislation, it is highly recommended to rely on the support of a certified accountant or specialised consultant. A qualified professional can provide personalised advice, ensure compliance with all obligations, and identify opportunities for tax and contributory optimisation.
HVR Business Consulting is prepared to assist your company in managing all Social Security-related obligations, including payroll processing, monitoring the new rules of the contribution cycle, and optimising your contributory situation. With over 25 years of experience and a team of certified accountants, we offer complete accounting solutions for companies starting from €150/month. Do not hesitate to contact us to schedule a consultation or learn more about our accounting services. Ensure compliance and peace of mind for your management.
Sources and Legal References
- Law no. 110/2009, of 16 September - Code of Contributory Regimes of the Social Security System (Articles 46, 63, 157, 157-A, 162, 163).
- Law no. 73-A/2025, of 30 December - State Budget for 2026 (Article 96).
- Decree-Law no. 127/2025, of 30 December - Establishes the new Social Security contribution cycle.
- Ordinance no. 480-A/2025/1, of 30 December - Update of the Social Support Index (IAS) for 2026.
- Labour Code (Law no. 7/2009, of 12 February, and its amendments) - For framing labour relations.
- Segurança Social Direta - Official portal for consulting information and submitting declarations.