The latest mining tax take would barely cover the annual salary of a single senior public servant.

In the past three months the minerals resource rent tax (MRRT) raised just $600,000 - far less than even the Abbott government's downgraded projections when it took over Labor's impost on coal and iron ore companies.

Treasurer Joe Hockey says Labor must support the coalition's attempts to repeal the tax.

"It continues to defy logic that Labor, under the leadership of Bill Shorten, would continue to support a tax which has raised next to no revenue but is linked to spending of $17 billion over the next four years alone," he said in a statement.

The Senate opposed the government's attempt to repeal the MRRT earlier this month because it wants to keep spending measures like the schoolkids bonus and the low income superannuation support, which are supposed to be funded by the tax.