What are the ABU and NBBU cao?

Both agreements set the rules for agency work: how the employment relationship builds up through phases over time, which pay the worker is entitled to, and how allowances, holidays and pension are arranged. The two agreements are similar in structure but differ in details, so it matters which one an agency follows.

A central principle is the hirer's pay (inlenersbeloning): the agency worker is entitled to the same pay elements as employees in an equivalent position at the client. That includes allowances such as ORT and overtime rates from the client's own collective agreement. For time tracking, this means the agency has to apply the client's rules, not its own.