Brisbane City Council's bus network is the least reliable in south-east Queensland and do not meet Translink guidelines according to a state government report.

Brisbane's bus fleet – while the biggest and most complex bus network in the state - is not meeting Translink's guidelines to have 90 per cent of services run on time.

Translink data says Brisbane's buses do not meet on-time targets. Credit:Harrison Saragossi

The Translink Tracker shows in the September to December 2015 quarter only 83.97 per cent of Brisbane's buses ran on time, compared to 94.86 per cent of Gold Coast buses and 97.63 per cent of Sunshine Coast buses.

Rail Back on Track's Robert Dow, who challenged the previous state government for publishing an aggregate south-east Queensland figure showing the buses did meet guidelines, said the low Brisbane figure was revealing.