The Council of Trade Unions is calling on the Government not to reduce workers' leave entitlements in changes to be made to the Holidays Act.
Labour Minister Kate Wilkinson is considering recommendations from a ministerial advisory group which included both union members and employer representatives.
CTU President Helen Kelly says employers' recommendations include reductions to workers' entitlement to sick leave, and would mean they receive less holiday pay.
Ms Kelly says if the Government does reduce entitlements, it would send a very bad message about where its priorities lie.
Business New Zealand chief executive Phil O'Reilly says while there may be differences between the views of employers and unions, no decisions have yet been made, the minister is still consulting, and it is important that no-one jumps to conclusions.
A spokesperson from Ms Wilkinson's office says a decision will be made next month.