The Opposition has been challenged to include in its sport and recreation policy provision to compensate sporting clubs for the impact of the Liberals' proposed GST.
Sport and Recreation Minister Graham Edwards said that while the election of a federal coalition government might save Richard Court's budget, it would destroy the budgets of sporting clubs and sporting families.
"GST will hit WA sport for six," Mr Edwards said.
"It will price some clubs and families right out of sport.
"Entry fees to sporting events - such as Test cricket and Eagles' matches - will attract GST, as will fees for sports such as golf, tennis, indoor cricket and swimming.
"Membership of sporting organisations, from local netball clubs to exclusive yacht clubs, will be subject to GST. So will coaching fees and the hire of sporting facilities and equipment.
"The cost of sports clothing and registration fees for district competitions will also increase by 15 per cent."
Mr Edwards said sporting and recreation clubs would have to carry the financial and administrative burden of complying with GST requirements, particularly on the sale of food and drink.
The limited exemptions available to non-profit organisations would involve complex paperwork and provide club officials - most of them volunteers - with unwarranted headaches.
"In soccer parlance, GST is an own goal for Mr Court," Mr Edwards said.
"It is about time he started standing up for WA sport instead of letting it become the scapegoat for his election promises.
"Instead of defending Fightback he should be fighting against it and protecting the thousands of sporting organisations and hundreds of thousands of participants and spectators who would be punished by the GST."