The Association of Garda Sergeants and Inspectors has said it is pulling out of talks on the extension of the Croke Park Agreement.
The decision was taken at a special meeting of the national executive in Dublin.
AGSI General Secretary John Redmond warned that his members would resist attempts to cut pay.
Mr Redmond said he did not think there would ever be a chance of the AGSI re-entering the process.
Premium payments were recognition of the frontline nature of the 24/7 role played by gardaí, he said, adding that the AGSI would not be involved in a process that reduces that pay.