THE Coalition has vowed to take back superannuation increases granted to workers as part of its promise to rescind the mining tax.

The shadow assistant treasurer, Mathias Cormann, gave the undertaking during a boardroom meeting with superannuation industry representatives late last week.

Given the Coalition would revoke all the measures the tax was slated to fund, that must include superannuation, he said.

The tax is designed to spread the benefits of the mining boom by providing tax cuts for big and small business, infrastructure funding and an increase to the compulsory superannuation from 9 per cent to 12 per cent by 2020.

Super will increase to 9.25 per cent in 2013-14 at a cost of $240 million but Senator Cormann told the Herald that would be abolished if the Coalition were in power by then.