TFC said the move reflects the growing importance of its commercial and buy-to-let divisions.
Nigel Payne, managing director of TFC, said: “The NACFB is a leading voice for the specialist finance community, in particular the commercial lending sector.
“Not only does it maintain a tight code of conduct for the sectors it covers, it also acts as a champion of the industry, representing its interests to government and helping to shape policy.
“As a responsible, national, specialist distributor, TFC Homeloans shares these goals – to improve standards in the sectors in which we operate and promote the interests of our industry.
“TFC has arranged commercial finance deals for 24 years and we are committed to this sector. We are proud to support the NACFB and look forward to working more closely with them.”