After five long years, a group of fed-up Canterbury claimants are vowing to take IAG to court.

From today, earthquake claimants in dispute with IAG have the option of joining a group action against the insurer.

Earthquake claimants still in dispute with IAG are being invited to sign on to a bulk packaged legal deal, which will allow individual claimants to file their own claims at a discounted price.

While all the claims will be from different people, they will all focus on one key issue.

Class action group spokesperson Philippa Coory said IAG has a history of assessing earthquake damage against slackened MBIE guidelines, rather than giving claimants what they're entitled to under their policy.

She said she's ready for pay-back.

"It will be like a freight train coming. That's what we are expecting is the amount of people that are just so fed up with what is going on and they all want resolution and what they are entitled to in their policy".

"When multiple people are saying this is not acceptable, one after the other, after the other, after the other, it means it will get the attention that it needs."

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