The New South Wales Nurses Association is seeking support from Hunter residents in its push for tax reform to fund public health services and secure the future of Medicare.

The association will hold a forum in Newcastle tonight to discuss its calls for the government to consider introducing a financial transaction tax, or Robin Hood tax, to generate revenue.

The Robin Hood tax involves a levy of between 0.005 and 0.05 per cent on the trading of financial instruments, such as stock and bonds.

The association's general secretary Brett Holmes said it would be a tax that would not impact significantly on ordinary Australians.

"As one solution to increasing the revenue that is available to our governments in order to provide our essential services like public health, aged care, education, social services, that are critical to a good and healthy society," he said.

Mr Holmes said, given the turnover of the financial system in Australia, the government could generate millions of dollars.

"The ordinary Australian wouldn't feel any great impact from these taxes, and it could be designed to avoid any impacts at all on low income people," he said.

"This is a tax that really would impact on those people that can afford to invest in those financial instruments, and it would have an impact on the large banks and financial institutions."