The union representing some bank workers says Westpac is refusing to offer staff a pay rise despite making millions in profits.
Finsec wants pay increased by up to 5% but says four days of bargaining ended on Friday with the bank refusing to offer staff anything.
The union says it wants the increase because of expected financial pressure on workers from the Government's Emissions Trading Scheme and GST rise.
Finsec spokesperson Andrew Campbell says Westpac made a $125 million profit in the first six months of the year.
"To come out of a recession whilst still making over a hundred million dollars, and then saying to staff, 'sorry, we're not going to help you' when some of the most significant cost increases in recent memory come on to them, is a very mean-spirited thing for an employer to do," he said.
Mr Campbell says not offering anything to staff is a mean-spirited attitude from the bank.
However, Westpac says negotiations are not over and it is working constructively towards a result.