In addition, there are generally binding collective agreements. These important agreements also bind disorganized employers and workers who work for them. 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. 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.
 Workers are not required to join a union in a specific workplace. Nevertheless, most industries, with an average union training of 70%, are subject to a collective agreement. An agreement does not prohibit higher wages and better benefits, but sets a legal minimum, much like a minimum wage. In addition, an agreement on national income policy is often, but not always, reached, bringing together all trade unions, employers` organisations and the Finnish government.  One area in which unions and employers are currently in conflict is that wage increases are mandatory bargaining partners. In Acme Die Casting v. NLRB, 26 F.3d 162 (D.C. Cir. 1994), the Court of Appeal analyzed the employer`s historical practice of determining the frequency and size of wage increases and found that the issue of granting a wage increase is not left to the employer`s discretion and cannot be decided without negotiation with the union. Since 2003, the U.S. Supreme Court has failed to resolve whether wage increases are mandatory collective bargaining issues, so federal appels courts have developed their own rules to address this issue. If an employer does not exercise discretion to determine the date or amount of the wage increase, the issue of wage increases is a matter of collective bargaining.
NLRB v. Beverly Enter.-Mass., Inc., 174 F.3d 13 (1st Cir. 1999). Even if an employer exercises some discretion in setting wage increases, such as an annual increase to cover the cost of living, this circumstance does not prevent wage increases from becoming a subject of duty if the company has long been granting such wage increases.