Almost every student on some school bus routes refuse to pay for their tickets.

The shocking figure was revealed at a roundtable convened at the Queensland Parliament on Wednesday, with educators, police, bus drivers and transport groups meeting to tackle a spike in fare evasion, which costs about $25 million a year in lost revenue.

Transport Minister Mark Bailey opened a roundtable discussion on fare evasion at Parliament. Credit:AAP Image/ Darren England

Teenagers have allegedly been abusing the state's "no child left behind" policy, implemented after the death of schoolboy Daniel Morcombe, to avoid paying for tickets.

School bus drivers recorded more than 1.53 million fare evasions last financial year, up from 875,000 the previous year.