Taxi owners have rejected the WA government's $100,000 plate buyback offer amid concerns the reimbursement scheme is unfair.

The Taxi Operator Legal Defence Group has criticised the government's refund model, which calculates the worth of a plate licence based on when it was purchased or potential earnings of the owner, spokesman Athan Tsirigotis said.

Some taxi owners had been offered $100,000 while others had received offers up to $225,000, Mr Tsirigotis said. Credit:Louise Kennerley

Some taxi owners had been offered $100,000 while others had received offers up to $225,000, Mr Tsirigotis said.

The group's finance and legal advice was to ask the government to revisit the offer to something "fair and equitable... across the board", he told 6PR radio on Monday.