Employee vs Contractor Payroll: What Software Do You Need?

If you’re running construction crews, labour-hire teams, or industrial services with a mix of employees and contractors on site, your payroll can be a compliance minefield. Contractor payroll alone carries obligations most business owners don’t realise exist until the ATO comes knocking: super requirements, taxable payment reporting, and payroll tax exposure that can catch even experienced operators off guard.

The software question isn’t complicated once you understand what each workforce type actually demands. This guide breaks it down.

Key Insights

• Employees and contractors trigger different payroll, tax, and super obligations – getting the classification wrong is expensive
• You may owe super for contractors even if they have an ABN, depending on how the contract is structured
• Contractor payments can attract payroll tax if the contractor primarily works for one principal
• Construction businesses must lodge a Taxable Payments Annual Report (TPAR) by 28 August each year
• Software that handles contractor payroll needs to manage both classification-based compliance and project-based pay conditions
• One platform for both employee and contractor payroll reduces admin errors and audit risk considerably

Why the Employee vs Contractor Distinction Matters More Than You Think

The employee vs contractor question determines your obligations for PAYG withholding, superannuation, payroll tax, workers’ compensation, and Fair Work entitlements.

According to the ATO, employees work in your business, while independent contractors provide services to your business. That distinction drives everything downstream, from what you withhold on payday to what you report each August.

The problem for most construction and labour-hire businesses is that the workforce rarely sits neatly in one column. You might have full-time employees working alongside engaged contractors on the same site, under the same award, doing the same work. When that’s the case, payroll can’t be a one-size process. You need systems that handle both compliantly.

How the ATO Tests Whether a Worker is an Employee or Contractor

The ATO identifies six key things to check when determining whether a worker is an employee or an independent contractor. These are:

1. Ability to Delegate or Subcontract: If the contract requires a worker to personally perform the work and they can’t delegate or subcontract, that’s a characteristic of an employee. True independent contractors can generally send someone else.
2. Basis of Payment: A set amount per period (such as an award rate, annual salary, or a regular hourly or weekly rate) is a characteristic of an employee. Payment for a result or quoted price characterises a contractor.
3. Who Provides the Equipment: If the business is responsible for providing the equipment, tools, and materials, that is a characteristic of an employee. Contractors typically supply their own.
4. Commercial Risk: Employees bear no financial risk – they get paid regardless. Contractors can profit or lose depending on how efficiently they deliver the outcome.
5. Control: Can you direct how the work is done, not just what gets done? That points toward employment. Contractors are engaged for an outcome.
6. Integration: Is the worker integrated into your team, attending your meetings, using your systems, and present as if they work there? 

No single factor is decisive. What it says on paper matters, but so does whether it reflects the real working relationship.

What Does Contractor Payroll Actually Involve?

Contractor payroll is not the same process as running employee pay runs. Here’s what it requires in practice.

Invoice Management

Most contractors invoice for services rather than submit timesheets. Your contractor payroll system needs to receive, match, and process invoices and flag discrepancies against agreed rates or project conditions.

PAYG Withholding

You generally don’t withhold tax from contractor payments – that’s their responsibility as a separate business entity. But there are exceptions. Labour-hire firms must withhold tax from payments to both employees and independent contractors working under a labour-hire arrangement. If a contractor doesn’t provide an ABN, withholding also applies.

Award and EBA Conditions

On-site contractors under labour-hire or project agreements often work under CFMEU, ETU, or CEPU rates with loadings, allowances, minimum engagements, and travel components baked in. Applying those rules accurately in contractor payroll is where manual systems start falling apart fast.

TPAR (Taxable Payments Annual Report)

If you are running a business primarily in building and construction where 50% or more of your business income is earned from those services, you must lodge a TPAR reporting all payments to contractors by 28 August each year. Your software needs to capture contractor ABNs, payment totals, and GST amounts throughout the year.

The Super Trap Most Construction Businesses Walk Into

Here’s what surprises many business owners: you may have to pay superannuation for contractors.

You must pay superannuation for independent contractors if you pay them mainly for their labour, regardless of whether they have an ABN. The three triggers are:

• The contract is mainly for their personal labour
• They can’t delegate the work to someone else, and
• They’re paid by time rather than for a result

The Super Guarantee rate for 2025–26 is 12%. If you’re paying a labourer $90,000 in annual contractor invoices and the arrangement triggers super obligations, you owe $10,800 per year, per worker, on top of that. Miss those payments, and you’re liable for the Super Guarantee Charge, which is calculated on salary and wages, plus a 10% interest component and $20 per employee per quarter in administration charges.

Contractor Payroll Tax: Another Hidden Headache

Superannuation is an ATO obligation. Payroll tax is a state obligation. And the rules around contractors can be complicated.

Payments to contractors are treated as wages – and are liable for payroll tax – when a contractor provides services exclusively or primarily for one principal in a financial year. In that situation, the principal who engages the contractor is deemed to be an employer, and the payments made are deemed wages. These rules apply in Victoria, and similar provisions exist in NSW, Queensland, and other states.

Exemptions exist. For example, where the contractor works fewer than 90 days in a financial year, engages others to do the work, or provides services to a range of clients. But they’re not automatic. You need to assess each contractor relationship against your state’s Payroll Tax Act and document your reasoning.

This is exactly the kind of ongoing assessment that shouldn’t live in a spreadsheet. Good contractor payroll software surfaces these flags (or, at minimum, generates the data your payroll manager or accountant needs to make the call) before a state revenue audit does it for you.

What Software Do You Need to Handle Both?

Your software needs to handle the employee vs contractor split correctly at every step, not just pay processing, but classification logic, compliance obligations, reporting, and audit trail.

For employee payroll, the non-negotiables are:

• Single Touch Payroll (STP Phase 2) reporting to the ATO
• Award interpretation software, especially in construction, where the Building and Construction General On-Site Award, CFMEU agreements, and enterprise bargaining arrangements layer on top of minimum rates
• Super calculated at the right rate, sent to the right fund, on time
• Leave management and termination processing

For contractor payroll, you need:

• Invoice processing and matching to project conditions
• Project-based pay rules for allowances, loadings, minimum engagements, and travel
• TPAR data capture throughout the year, not just in August
• Super obligation flagging where labour contracts trigger SG requirements
• Payroll tax reporting for deemed wages

And if you’re running both through the same platform, you need clean separation between the two (tax treatments, reporting pathways, pay logic) – all without doubling your admin.

The worst-case scenario is running employee pay through one tool, contractor timesheets through another, and reconciling everything manually at month-end. That’s where errors compound, TPAR details go missing, and payroll tax exposure builds unnoticed until an audit surfaces it three years later.

Find Software You Can Trust to Do It All

Getting contractor payroll right in construction and labour-hire isn’t optional. Between super obligations on labour-based contracts, payroll tax exposure, TPAR reporting, and the ever-present risk of misclassification, the compliance burden on businesses running mixed workforces is real – and it keeps growing.

Wojo’s contractor payroll software is built specifically for this environment. It reads labour-hire agreements, project contracts, and EBAs, automatically applying loadings, allowances, minimum engagements, and travel conditions. And it connects directly to your payroll engine, so contractor and employee pay flows through the same platform without the data-reconciliation headaches.

If your current setup involves a payroll system, a separate contractor spreadsheet, and a frantic TPAR scramble every August, it’s worth a conversation. Book a call with the Wojo team and see how it works in practice.