How Many Hours Can a Volunteer Work? Law 2026

One of the most common questions HR departments receive when planning a volunteer program is: "How many hours can a volunteer work without creating legal issues?" It’s a reasonable question. And the answer has important nuances that should be clearly understood before designing any program. Here you’ll find everything you need to know about the Spanish legal framework for volunteering, with a special focus on hour limits, protections, and the obligations of all parties. Legal Framework for Volunteering in Spain Law 45/2015 on Volunteering The key legislation is Law 45/2015, of October 14, on Volunteering , published in the Official State Gazette (BOE). This law establishes the general framework for all volunteer activities in Spain, whether organized by an NGO or promoted by a company as part of its corporate program. The basic principles it sets forth are: freedom (no one can be forced to volunteer), altruism (the activity cannot involve direct financial compensation, although there are exceptions in paid models), solidarity (oriented toward the common good), and complementarity (it cannot replace paid employment). Legal Definition of Volunteering According to Article 3 of the Law, volunteering is “the set of activities of general interest carried out by individuals, provided that such activities are not performed under an employment, civil service, commercial, or any other paid relationship and meet the following requirements: that they are of a charitable nature, that they are performed freely, without being based on a personal obligation or legal duty, and that they are carried out without financial compensation." This is key: if at any point the volunteer activity begins to resemble an employment relationship too closely—with fixed hours, organizational dependence, and a stable nature—there is a risk of legal reclassification as an employment relationship, with all its implications (social security contributions, income tax, severance pay, etc.). Hour Limits: What Is the Maximum? No Specific Legal Limit Here is the straightforward answer: Law 45/2015 does not establish a maximum limit on volunteer hours . There is no specific number stating that “more than X hours is illegal.” This may come as a surprise, but it makes sense: the nature of volunteering is so diverse that setting a single limit would be impossible. A volunteer helping during a natural disaster might work 40 hours in a week. A corporate mentor might dedicate 2 hours a month for a year. Both are legitimate forms of volunteering. Recommended Weekly Hours for Corporate Volunteering However, there is a standard industry recommendation: in the context of corporate volunteering integrated into the workday, it is customary to range from 4 to a maximum of 8 hours per week , or to engage in occasional volunteer shifts (one or two per year per employee). This recommendation has a practical rationale: beyond that threshold, the activity begins to resemble a second job. And if a company is paying for that time (the volunteer’s employer “releases” them from work hours), the situation can raise questions about whether the recipient NGO is receiving disguised labor without paying the corresponding social security contributions. The key criterion: Is paid employment being replaced? The most important indicator is not the number of hours per se, but whether the volunteering is replacing a paid position that should exist. This is expressly prohibited by law. If an organization stops hiring someone because it has volunteers who do that work on a stable and continuous basis, there is a legal problem. For corporate volunteering, this is rarely an issue if the program is well-designed: the activities are complementary, not a substitute for employment at the host NGO. Difference Between a Volunteer and an Employee Nature of the Relationship The fundamental difference is the presence or absence of an employment relationship. An employee has an employment contract, receives a salary, contributes to Social Security, and has full labor rights (vacation, severance pay, etc.). The volunteer has a participation agreement (not an employment contract), does not receive a salary (or may receive a small stipend), and their protections are of a different nature. Protections for Volunteers Although volunteers do not have labor rights in the strict sense, Law 45/2015 grants them important protections: the right to be clearly informed of their role, accident insurance during the activity, civil liability coverage, and the right to withdraw from the activity without reprisal if there is just cause. Volunteer Obligations Regarding Taxes Unpaid volunteering does not generate tax obligations. Expenses covered by the organization (transportation, meals) are also not taxable if they are reasonable and documented. In the case of paid volunteering, the compensation is taxable as income from work, even if it is in the form of a stipend. For a guide on the full differences between volu