The action comes after the compliance officers rejected a pay rise that did not consider an equal wage with equivalent London Underground staff.
Unite regional officer Steven Stockwell said: “These workers are putting themselves in harm’s way on a daily basis and just want pay parity compared to other colleagues in London on a different part of the network.”
TfL said: “We are disappointed that the Unite union has announced this strike action for members of our Compliance, Policing, Operations and Security Directorate.
“This action only impacts the bus network, however we have measures in place and still plan to have officers carrying out revenue inspection on buses.”