Construction Industry Tax Guide
TPAR obligations, subcontractor classification, security of payment, and structure decisions for builders, subbies, and construction businesses in Australia.
Australian construction businesses face sector-specific reporting through the Taxable Payments Annual Report (TPAR), due 28 August each year, covering all payments to contractors where 50% or more of business income comes from construction services. Superannuation obligations extend to labour-only subcontractors under s 12(3) of the Superannuation Guarantee (Administration) Act 1992, with the SG rate at 12% for 2025-26. Misclassifying employees as contractors remains the single highest-penalty audit area in the industry.
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Taxable Payments Annual Report (TPAR)
The TPAR is the ATO's primary tool for the construction industry. Any business earning 50% or more of its total income from building and construction services must report all payments made to contractors during the financial year. The report captures total amounts paid, contractor ABN, name, address, and the type of construction services provided. It is due by 28 August and is lodged electronically through accounting software or the ATO Business Portal. The ATO cross-references TPAR data against each contractor's tax return, BAS lodgements, and superannuation contributions. Gaps between what a head contractor reports paying and what a subcontractor declares earning are flagged automatically. The penalty for failing to lodge can reach $1,110 per 28-day period (administrative penalty under TAA 1953 Schedule 1 Division 286). For businesses operating across multiple trades (for example, a builder who also does property development), the 50% test applies to the business as a whole, not to each activity separately.
Subcontractor vs Employee Classification
Worker classification in construction attracts the highest ATO audit intensity of any sector. From 26 August 2024, the whole-of-relationship test examines the totality of the contractual arrangement, not individual factors in isolation. A genuine subcontractor operates with business independence: they provide their own tools and equipment, carry commercial risk of profit and loss, maintain their own insurance, advertise services to multiple clients, and control how, when, and where work is performed. An employee receives direction and control, is integrated into the business, bears no commercial risk, has equipment provided, works regular hours, and depends on a single income source. Contractual labels alone are irrelevant. The ATO looks at the substance of the working relationship. Getting this wrong triggers back-payment of PAYG withholding, superannuation (plus the super guarantee charge including interest and penalties), workers compensation premiums, and potential penalties under the Fair Work Act 2009.
The principally-for-labour test for SG
Even when a worker is a genuine contractor for income tax purposes, they may still be a deemed employee for superannuation under s 12(3) SGAA 1992. The test asks whether the contract is wholly or principally for the person's labour (more than 50% of the contract value). A tiler who supplies only labour and basic hand tools is principally for labour. A concreting subcontractor who supplies concrete, pumping equipment, and formwork with labour as a smaller component likely falls outside the test. SG at 12% applies on the labour component only, excluding materials, equipment hire, and GST. There is no minimum earnings threshold: super is owed from the first dollar.
Security of Payment Legislation by State
Every Australian state and territory has enacted security of payment (SOP) legislation protecting contractors' right to timely payment for construction work. These laws void 'pay when paid' clauses and establish statutory rights to progress payments, mandated payment timeframes, and rapid adjudication for disputes. SOP legislation cannot be contracted out of. Payment timeframes vary by jurisdiction: NSW allows a maximum of 15 business days from a head contractor and 20 business days for subcontractors. Queensland specifies 25 business days for construction management contracts and 15 business days for commercial building. Victoria's recent amendments void any contractual term requiring payment beyond 20 business days. Western Australia maintains separate timeframes under its own act.
Builder Licensing and Workers Compensation
Builder licensing is state-based and mandatory. NSW licensing sits with Fair Trading, Victoria with the Building and Plumbing Commission, Queensland with the QBCC, and Western Australia with the Building Commission. Each state requires appropriate technical qualifications, demonstrated experience, and financial capacity before issuing a licence. Licence tiers determine the scope and value of work a builder can undertake. Trading without a licence is an offence carrying significant penalties, and contracts entered without a valid licence may be unenforceable. Workers compensation insurance is also state-based and mandatory for employers. The worker's 'state of connection' determines which jurisdiction's scheme applies, based on a five-step test examining where the worker usually works, their usual base, and the employer's principal place of business. Premiums are deductible business expenses. Home building warranty insurance is mandatory in all states except Tasmania for residential work above specified thresholds.
Home building warranty insurance thresholds
NSW requires warranty insurance for residential work exceeding $20,000. Victoria's threshold is being reformed from $16,000 to $20,000, with the Building and Plumbing Commission now providing first-resort domestic building insurance for contracts at or above $20,000. Queensland has the lowest threshold at $3,300. Western Australia matches NSW at $20,000. South Australia, the ACT, and the Northern Territory each set the threshold at $12,000. Tasmania is the only jurisdiction with no mandatory scheme. These thresholds apply to the total value of residential building work, not individual invoices.
GST on Construction Services
Construction services attract standard 10% GST. New residential premises sold by developers attract GST at one-eleventh of the sale price. The margin scheme allows GST to be calculated on the margin (sale price minus purchase price) rather than the full consideration, which is significant for developers who purchased land before GST applied or from a non-registered vendor. Purchaser withholding at settlement requires buyers to withhold one-eleventh of the contract price for fully taxable supplies, or 7% for margin scheme transactions, and remit directly to the ATO. This withholding obligation falls on the purchaser, not the builder, but builders need to understand it because it affects cash flow at settlement. Progress claims should include GST calculated on each claim, and input tax credits on materials, subcontractor invoices, and business expenses are claimed through the BAS.
Deductions: Tools, Vehicles, and Safety
Construction workers and business owners can claim a wide range of work-related deductions. Tools and equipment (hand tools, power tools, machinery) are deductible. Individual assets costing less than $20,000 qualify for the instant asset write-off, and multiple assets can each be claimed separately. Vehicle expenses for utes and work vans used for business are deductible using either the cents-per-km method (88 cents per kilometre for up to 5,000 business kilometres in 2025-26) or the logbook method (actual costs multiplied by business-use percentage). Safety gear and PPE, White Card and confined space training, working at heights certification, sun protection, public liability insurance, income protection insurance, and travel between job sites are all fully deductible. The $20,000 instant asset write-off has been made permanent from 2026-27, which is significant for tradies purchasing tools, small plant, and vehicles.
Sole Trader vs Pty Ltd for Construction Businesses
The structure decision shapes liability exposure, tax outcomes, and compliance costs. A sole trader carpenter earning $95,000 with $18,000 in deductions pays approximately $15,428 in tax and Medicare levy on $77,000 taxable income (2025-26 rates). A subcontractor electrician earning $140,000 through a Pty Ltd company, paying a $60,000 salary plus $7,200 super to themselves as director, faces combined company and personal tax of approximately $25,238, saving roughly $3,259 compared to the sole trader equivalent, plus gaining limited liability protection and the ability to retain $41,250 after-tax profits for reinvestment. The company structure introduces higher compliance costs: ASIC annual review fees, more complex accounting, potential Division 7A issues if loans are drawn from the company, and separate superannuation obligations. The base rate entity company tax rate is 25%. For construction businesses with significant contract values and subcontractor chains, the limited liability protection is often the primary driver rather than tax savings alone.
Statute references
- TAA 1953 Schedule 1 s 12-190 (no-ABN withholding at 47%)
- TAA 1953 Schedule 1 Division 396 (TPAR obligations)
- Superannuation Guarantee (Administration) Act 1992 s 12(3) (contractors deemed employees for SG)
- A New Tax System (Goods and Services Tax) Act 1999 Divisions 40, 75 (GST on construction, margin scheme)
- Fair Work Act 2009 (worker classification, National Employment Standards)
- Building and Construction Industry Security of Payment Acts (state-based)
- ITAA 1997 s 8-1 (general deduction provision)
- ITAA 1997 Division 40 (capital allowances and depreciation)
Frequently asked questions
Do I need to lodge a TPAR if I only used one subcontractor last year?+
My subcontractor has an ABN and invoices me. Do I still owe them super?+
What happens if I pay a contractor who does not quote an ABN?+
Is home building warranty insurance tax deductible?+
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