Contractor vs Employee Classification

The distinction between a contractor and an employee is one of the most consequential classification decisions in Australian employment and tax law -- and it directly affects how payments are processed through accounts payable. Employees are paid through payroll, subject to PAYG withholding, superannuation, and leave entitlements under the Fair Work Act. Contractors are paid through AP as supplier invoices, and the paying business has different (but still significant) obligations depending on whether the contractor arrangement is genuine.

The ATO and Fair Work Commission apply a multi-factor test to determine whether a worker is genuinely a contractor or whether the arrangement is, in substance, an employment relationship regardless of how it is documented. The key indicators include: whether the worker can subcontract or delegate the work, whether the business supplies tools and equipment, whether the worker bears financial risk (can make a profit or loss), whether the worker works exclusively or predominantly for one principal, and whether the worker is economically dependent on the principal. No single factor is determinative; the totality of the relationship is assessed.

AP implications of contractor classification

When a genuine contractor provides an invoice with an ABN, the payment is processed through AP: no income tax withholding, no superannuation obligation under standard arrangements (though super may apply in specific circumstances, see below), and GST is handled through the normal ITC process. The contractor manages their own tax and super obligations. The paying business's obligation is limited to ABN verification, TPAR reporting where applicable, and standard AP processing.

When a worker is classified as a contractor but the arrangement meets the ATO's indicators for employment, the paying business faces significant retroactive liability: unpaid PAYG withholding plus interest, unpaid superannuation contributions plus the super guarantee charge, potential Fair Work penalty payments for leave entitlements not provided, and payroll tax liability in most Australian states. These liabilities can be assessed years after the fact and can be substantial for businesses with large contractor workforces.

Superannuation for contractors

Even genuine independent contractors can trigger superannuation guarantee obligations. Under section 12(3) of the Superannuation Guarantee (Administration) Act 1992, an employer must pay superannuation on payments to a contractor who works under a contract that is wholly or principally for their labour -- where the contractor is providing their personal labour rather than the output of a business. This applies regardless of whether the contractor has an ABN or invoices as a company. AP teams processing contractor invoices need to know whether super applies to each contractor relationship so that it is either paid by the business or confirmed to be the contractor's own responsibility.

The practical process for AP teams is to flag contractor invoices for classification review at onboarding -- before the first invoice is paid -- and document the classification decision with the factors considered. This creates an audit trail that demonstrates the business applied a genuine assessment rather than simply labelling workers as contractors for convenience. The ATO's employee or contractor online tool provides a formal assessment that can be relied on if the classification is later disputed.