Billericay, whom Hereford entertain in the FA Trophy on December 15th, have announced their intention to go full time.
Ricay, who currently play at the same level as the Bulls, have already increased the players training hours.
"With promotion to the National League a huge possibility now, the
decision has been made that going fully professional will help the club
realise its ambitions going forward," said chairman Dan Groves.
"We have had a good conversation with the squad and as with any change to working hours, sadly some players will be affected because of other work commitments, however as a club we will do whatever we can to help these players stay with us and work around their other commitments.
"We want players here who want to stay on this journey with us and if we are to look to progress to the next step of the football pyramid these changes have to happen."
Billericay is owned by Glenn Tamplin.