Construction industry scheme: verify, deduct, report, repeat

The construction industry scheme makes a contractor deduct tax from what it pays a subcontractor and hand it to the tax authority instead. It exists because construction has a long history of cash payments and disappearing traders, and it works by moving the collection point from the subcontractor to the person paying them. The practical effect is that if you pay anyone for construction work, you may have become a tax collector without noticing — and the obligations run monthly, with penalties for late returns whether or not any tax was due.

Who the construction industry scheme applies to

• Anyone paying subcontractors for construction work, including businesses whose main trade is something else once their construction spend crosses a threshold.
• Subcontractors receiving such payments, who register to reduce the deduction rate rather than to join.
• Both roles at once is common: a subcontractor who engages their own subcontractors is a contractor for those payments.
• Some work is excluded — professional services, manufacturing materials off site, carpet fitting — and the exclusions are narrower than people assume.
• The thresholds, rates, exclusions and return deadlines are jurisdiction-specific and change; the mechanics below are general and the numbers are not.

The monthly cycle

1. Verify the subcontractor before the first payment, through the tax authority’s service, and record the verification reference. Paying at the wrong rate because you skipped verification is your liability, not theirs.
2. Split the invoice: materials are not subject to deduction, labour is. A subcontractor who does not itemise materials is inviting deduction on the whole amount.
3. Deduct at the verified rate, pay the subcontractor the net, and give them a statement showing the deduction.
4. File the monthly return by the deadline, including a nil return in months where you paid nobody — the penalty applies to the missing return, not to missing tax.
5. Pay the deducted amounts over on schedule, separately from your own tax.
6. Keep the verification references, the statements and the invoice splits together, because this is exactly what an enquiry examines.

The nil return is the single most common penalty in the scheme. A contractor with no subcontractor payments in a month still has a filing obligation, and the penalty accrues for a return that would have shown nothing. Diarise the monthly date from the moment you register, not from the first month you actually pay someone.

Where contractors get caught

• Treating a subcontractor as self-employed for the scheme while the same person looks like an employee on the facts — the scheme does not settle employment status, and getting status wrong is a separate and larger problem.
• Materials not itemised, so deduction is applied to the full invoice and the subcontractor is out of pocket for months.
• Verification done once and never repeated, when a subcontractor’s status can change.
• Gross payment status assumed rather than verified, which is the expensive version of the same error.
• Statements not issued, which is a breach in itself and makes the subcontractor’s own return impossible to complete.
• Records spread between the accounts system, an inbox and someone’s notebook — the usual state, and the reason enquiries take weeks.

Public works carry wage obligations beyond the contract. A Davis-Bacon wage determination sets the minimum rates and fringe benefits per classification for a federally funded project, and payroll reporting is checked against it.

Where the records live

Ettex Records keeps one record per subcontractor with the verification reference and date, the rate applied, and each payment with its materials and labour split — which is the form an enquiry asks for and the form that makes the monthly return an export rather than a reconstruction. Keep the deduction statements you issued on the same record rather than in sent mail. It sits next to the supplier onboarding file, since verification belongs in onboarding rather than in a separate compliance step. Ettex does not file returns, does not verify subcontractors with any tax authority and gives no tax advice — the scheme has real penalties and an accountant who knows it is worth the fee.