Telco Services Australia, a Perth-based call centre operator for Centrelink, paid no corporate tax for two years despite earning huge revenue. New financial documents show the company made $185 million in 2024-25 yet reported no taxable income. The previous year, it earned $130 million and also paid zero tax. This period matches the company's $90 million plus contract with Services Australia to run call centre operations for social security. Jason Ward, analyst at the Centre for International Corporate Tax Accountability and Research, said the setup "appeared to be structured in ways to have avoided reporting and tax obligations in Australia." Financial reports reveal $166.5 million in related party transactions that “virtually eliminate profits,” leading to no tax. Payments to directors increased, even as the company showed a financial loss. There is no evidence of illegal activity. Telco Services is part of the larger TSA Group with over 4,300 workers across Australia and the Philippines. The group also handles contracts for Telstra and NRMA Insurance. A TSA spokesperson said while Telco Services reported no taxable income, "other associated entities did and the appropriate amount of tax has been paid by them." They added the tax arrangements were reviewed by an independent auditor. However, TSA’s complex structure makes verifying total tax payments difficult. Another arm, Telco Sales, paid around $700,000 in tax in 2022-23 but got a partial refund the next year despite generating $120 million in revenue over two years. Staff for the contract are employed by another TSA entity, Trimatic Management Services, which recently received $5 million in grants from the Western Australia government. Services Australia said it operates one of the largest contact centre networks with mostly permanent public staff supported by contractors. This case raises concerns about transparency and tax practices in firms winning large public contracts. Guardian Australia will continue to follow this story.