A collective agreement, a collective agreement (TC) or a collective agreement (CBA) is a written collective agreement negotiated by collective bargaining for workers by one or more unions with the management of a company (or with an employer organization) that regulates the commercial conditions of workers in the workplace. These include regulating workers` wages, benefits and obligations, as well as the obligations and responsibilities of the employer, and often includes rules for a dispute resolution process. Portuguese law distinguishes three types of collective agreements according to the nature of the signatories on the employer side (Article 2, Collective Labour Relations Act): association agreements negotiated by employers` organisations; multi-employer agreements negotiated by a number of employers who, whether or not they are members of employer organizations, do not act through any association to negotiate the agreement in question; Agreements concluded at the company level by a single employer. This distinction is used by law to resolve specific conflicts between collective agreements (see also collective bargaining: level of bargaining, instruments of collective labour regulation). Another legal distinction, based on the different nature of the scope of collective agreements, is defined by horizontal and vertical agreements (see below). In Sweden, about 90% of employees are subject to collective agreements and 83% in the private sector (2017).   Collective agreements generally contain minimum wage provisions. Sweden does not have legislation on minimum wages or legislation extending collective agreements to disorganised employers. Unseated employers can sign replacement agreements directly with unions, but many do not. The Swedish model of self-regulation applies only to jobs and workers covered by collective agreements.  There are provisions that are covered by collective agreements that are not governed by legislation.
These issues include travel expenses, vacation bonuses, extra days off (called “pekkasvapaat”) or sick or maternity leave benefits. Collective agreements also include decisions on working time and overtime pay. Trade Union Pro`s collective agreements include, for example, agreements on shift work differences, travel allowances, sick pay, maternity leave benefits, leave pay and child care benefits. The general term refers to agreements between unions and employers or employers` organizations (see ability to enter into collective agreements) to regulate both individual labour relations and relationships established directly between the signatory parties (see below, content). The Portuguese Constitution lays the groundwork for the legal institutionalization of collective bargaining by giving trade unions the power to exercise the right to negotiate (Article 56, paragraph 3, paragraph 4). The normative effects of collective agreements are expressly recognized by law (Article 12, Employment Contracts Act), which is one of the sources of employment contract law (see sources of labour law). Thus, the provisions of collective agreements apply directly to individual labour relations and replace all contractual conditions less favourable to the workers concerned.