The taxpayer-funded Bankwest Stadium is bringing a financial benefit of nearly $1 million to Parramatta each time an event is held at the venue.

New economic analysis shows about 450,000 patrons have attended ticketed events at the 30,000 seat stadium - which the state government built for less than its budgeted $360 million - since the venue opened in Sydney's west in April.

The stadium has attracted more than half a million visitors to ticketed events since it opened in April. Credit:Brook Mitchell

Visitors to three of those events injected a combined $2.9 million to the local area's economy in June and July, analysis commissioned by the City of Parramatta Council and Venues NSW found.

The Micromex Research, published on Wednesday, found visitors to the three sporting events spent an estimated $1.27 million inside Bankwest Stadium and about $1.65 million in the Parramatta area.