Frustration with the Trans-Pacific Partnership agreement will be expressed at events in towns and cities around the country on Saturday.
The Day of Action is supported by the NZ Council of Trade Unions, Public Services Association, FIRST Union, Greenpeace, 350.org, Oxfam New Zealand, and SAFE for Animals, organisers say.
Events are planned in Auckland, Wellington, Christchurch, Dunedin, Hokianga, Whangarei, Rotorua, New Plymouth, Palmerston North and Nelson.
The Auckland event is a concert in Victoria Park from 1pm.
"This is a time when families are struggling with high housing costs, insecure work and stagnant wages. The gaps between the haves and have-nots are widening in our society," co-ordinator Barry Coates says.
He says there is a need to "join the dots" between many issues and reclaim democratic rights for citizens and national sovereignty. The organisers are critical of the power of multi-national corporations.