As of 2015[update], its funding consisted of an initiation fee, a per capita tax of 70 cents per member per month, an annual levy, agreements negotiated, sale of supplies and assessments.

It also coordinates the efforts of local unions in the building trades, including contract negotiations with employer organizations and apprenticeship and training programs.

The organization also helps its affiliate unions establish, coordinate and uphold minimum educational standards for apprenticeship and journeyman training programs.

[8] The NABTU´s purpose is described in 13 sections as coordination, organization and formation of local councils, apprenticeship training, health and safety practices, dispute resolution and jurisdiction, engagement with industry, negotiations of wage and working conditions, legislative activity, research and public communications helping members to become elected officials.

[11] NABTU offered a $200,000 reward for information about the hanging of a rope noose at the Y-12 Uranium Processing Facility construction site in Oak Ridge, Tennessee.