In a national ballot 61.1% of the quarter of a million members of the Public and Commercial Services Union (PCS) voted for a strike and 83.6% voted for other forms of industrial action, on a 32.4% turnout.
The PCS's national executive committee confirmed the union will prepare for a strike on Thursday 30 June and will work with the National Union of Teachers, Association of Teachers and Lecturers and the University and College Union to co-ordinate any action.
the union stated: "Unless the Government does an about-turn on its plans to force public sector workers to work longer and pay more for much less pension in retirement, this first joint strike will include 750,000 public servants. And there is also a very real prospect of hundreds of thousands more workers joining the dispute later in the year."
The union says the Government's "slash and burn" approach to tackling the budget deficit will mean vital public services are axed, "hundreds of thousands of public sector workers will be thrown out of work, and those that remain will have their pay and pensions cut."
PCS general secretary Mark Serwotka said: "This result shows that public servants, who provide vital services from the cradle to the grave, will not stand back while everything they have ever worked for is taken from them.
"The Government admits that money cut from pensions will go straight to the Treasury to help pay off the deficit in what is nothing more than a tax on working in the public sector. The very modest pay and pensions of public servants did not cause the recession, so they should not be blamed or punished for it.
"Unless ministers abandon their ideological plans to hollow out the public sector, they will face industrial action on a mass scale on 30 June and beyond."
