Mzdové príplatky (wage supplements) are legal extra payments above the basic salary. Most often: for working at night, on Saturday, Sunday, holidays, and for overtime hours.
Their amounts are tied to the minimum hourly wage and are updated every year (guidelines for 2026: night work +40%, Saturday +50%, Sunday and holidays +100%). Therefore, the real income for shift work is often higher than the "bare" salary advertised in job offers. Check the current percentages at [employment.gov.sk](https://www.employment.gov.sk).