35. Costs of employee benefits

 31.12.201631.12.2015
Payroll expenses: (1 084 141) (723 197)
- current salaries and wages (1 002 605) (659 269)
- jubilee bonuses (20 874) (50 420)
- retirement benefits (3 236) (9 364)
- other (57 426) (4 144)
Social security and other benefits (406 611) (266 292)
- Social Security premiums (226 871) (154 480)
- appropriation to the Company’s Social Benefits Fund (42 792) (27 647)
- other social benefits (74 114) (59 491)
- other post-employment benefits (11 728) (12 016)
- other (51 106) (12 658)
Total (1 490 752) (989 489)

Employment guarantees

Based on an arrangement entered into by the Group and labor unions, specific employment guarantees have been given to people employed by the Group before 29 June 2007, which expire on 31 December 2018.

Furthermore, the provisions of the aforementioned arrangement will remain in force longer for employees who, at the expiry of the guarantees, have maximum four years to satisfy the conditions to acquire pension rights. This implies that in the event the employer fails to comply with the guarantees, employment contracts may not be terminated without payment of additional benefits to employees who, at the expiry of the guarantees, have maximum four years to satisfy the conditions to acquire pension rights.

Under the employment guarantees, in case the employement contract is terminated by the employer, the Group is obliged to pay an employee an amount being the product of their monthly salary and the remaining period of the guarantee validity. 

Under the social agreement concluded on 10 August 2007 between Enea Wytwarzanie S.A. and trade unions workers employed in Enea Wytwarzanie S.A., at the date of entry into force of the agreement, the employment guarantees has been extended for further 11 years, ie. till 30 January 2019.