Staff numbers at Queensland’s Crime and Corruption Commission have been reduced as the watchdog prepares to investigate only serious corruption.

Seven jobs have been cut in the overhaul of Queensland’s corruption watchdog.

Crime and Corruption Commission acting chairman Ken Levy said staff decreased from 341 last financial year to 334.

Full-time research and legal service staff were cut as well as those who assess complaints.

Dr Levy, who is giving evidence to a budget estimates hearing, said fewer staff were needed as fewer complaints would be be assessed.

After recent reforms, the watchdog will investigate only serious corruption after reports found it was being overwhelmed by minor complaints.

It received about 4000 a year, with fewer than 100 taken further.

The watchdog’s budget was boosted by $1.49 million this financial year, taking total funding to $53 million, the hearing was told.

The extra money is part of an additional $7 million, allocated over a number of budgets, to fight criminal motorcycle gangs and organised crime, and target proceeds of crime.