Homelessness charities in Wales could receive less money because of reforms in the way housing-related services are funded.
Under the UK-wide Supporting People programme, funding for housing-related services from local and national authorities, previously from a variety of sources, will be pooled and distributed by local authorities.
Welsh homelessness charities are concerned that money previously earmarked for them could be allocated to organisations working in other areas.
Richard Frame, director of Newport Action for Single Homeless, said: "They could relegate us and other causes not attractive to the public to the bottom of the list."
Andrew Connell, policy officer for supported housing at the Wales Council for Voluntary Action, agreed, but added that some local authorities may see single homelessness as a priority. "Essentially, Supporting People is a good use of support funding despite these concerns,