The association will reduce its operating costs to cover the shortfall, it said at its AGM at Melbicks Garden Centre last week.
It also announced that it will be running a conference entitled Managing a Business Through Recessionary Times on 5 March at the Hilton in Bromsgrove. Topics will include cost reduction, smart buying and making the most of staff.
HTA director general David Gwyther said: "An economic downturn provides businesses with the opportunity to make use of many of the initiatives on offer to them from their trade association.
"By maintaining our member rates for a year we hope that many businesses will make use of the business improvement schemes, training, promotional campaigns and advice services that their membership brings, in order that they survive the recession."
Commercial director Andrew Maxted said: "The industry is holding up well."