GMB members across England, Wales & Northern Ireland have voted to reject the local Government pay offer.
A majority of 64 per cent voted to reject the offer of £1,925 - on a pro rata for part time and term time only workers - for 2023/24.
More than 200,000 members were balloted. Turnouts varied across different workplaces but reached as high as 100 per cent in some.
Unless negotiations are reopened, GMB will move to industrial action ballots.
Sharon Wilde, GMB National Officer, said:
“GMB members across England, Wales & Northern Ireland have voted to reject the NJC pay offer for this year.
“We now call on the Local Government Association (LGA) to return to the table and make an improved offer that recognises the true value of our members working in our schools and across our councils.
“We will also be calling on central government to provide additional funding to allow employers and schools to pay more and invest in their workforce.
“If negotiations aren't reopened and a revised offer made, we will move to industrial action ballots in some areas.”