Assistant Treasurer Stuart Robert was asked "multiple" times by the finance department about his exorbitant home internet bills of up to $2800 per month, but continued on the same plan because there was "no alternative".

Mr Robert, who has a masters degree in information technology, has recorded monthly home data bills about 20 times higher than the average politician's since 2016.

Stuart Robert Credit:AAP

The Fadden MP said he used "around" 300 gigabytes of data in May 2018 and the charge of $2832 was a result of exceeding his data limit of 50GB and having to pay per gigabyte after that.

Mr Robert acknowledged the excessive charges were "much higher than anticipated and higher than what the community expects".