Help's crisis services manager, Iona Winter, said officials expected the agency would be funded again through the latest CRF round, but it has missed out unexpectedly.
"So all of a sudden everyone is surprised and we are at ground zero," she said.
"We have to advise staff if we need to have a restructuring or have redundancies. Because it's from the end of January, we have to give notice before Christmas."
Ms Winter said 14 or 15 people, including casuals, could be affected.
The agency still receives funding for other services from the Social Development Ministry, philanthropic trusts and other fundraising, with a total budget this year of $1.6 million.
But Ms Winter said it could not run a 24/7 service without the funding.
"We are looking at potentially having to cut back to running it at about a quarter of what we are running now," she said.
A Social Development spokeswoman said the ministry would keep talking to Help and other agencies about funding.
Minister Paula Bennett has set up an advisory panel to recommend a long-term solution for all sexual abuse services by June.
The Health Ministry was unable to comment before deadline last night.
Crisis management
10,000 crisis calls a year
$1.6m total budget for Auckland Sexual Abuse Help
$365,000 a year funding from ACC up to 2009
$220,000 a year from Social Development Ministry's short-term Community Response Fund