The aim of this thesis is to describe the factors which influence the amount of the employee's wage and the tax base for the calculation of tax on personal income. Chapters therefore deal with the conclusion of the employment contract and the commencement of employment, on the rules of remuneration of employees under the Labor Code and related components of wages, then there is also mentioned reimbursement of expenses, which may arise in relation with the performing work, marginally are mentioned employee benefits. Other chapters deal with deductions from wages in the form of social security, health insurance and tax on personal income. Finally, there is an accounting of the facts, which have been mentioned in the course of thesis