Anti-vaxxers to lose $28 a fortnight

Parents who don't vaccinate their children will lose $28 in family benefits every fortnight.

The new policy, announced on Monday, to start from July 2018 will see the two-weekly family tax benefit part A payment docked for each child who doesn't meet immunisation requirements.

Social Services Minister Christian Porter and Health Minister Greg Hunt say reducing fortnightly payments instead of withholding the end-of-year supplement will serve as a constant reminder to parents to vaccinate their children.