Construction and tradie expenses in New Zealand: schedular payments, provisional tax, and what you can claim

New Zealand has no Construction Industry Scheme, but it has its own version of tax-at-source for the trades: schedular payments. Add provisional tax and GST on top, and the tradie’s real job is keeping records clean enough that withholding, instalments, and GST credits all reconcile at year end. Every figure below is sourced from Inland Revenue guidance in the Sources section.

Schedular payments: withholding for labour-only contractors

Payments to contractors who mainly supply labour can be schedular payments, where the payer withholds tax at source and pays it to Inland Revenue, much like PAYE but for contractors ^[1] . Labour-only building work is a common case. The contractor completes an IR330C tax rate notification and chooses a withholding rate; if no rate is chosen, the payer must use the standard rate ^[2] .

The withheld tax is a credit against the contractor’s end-of-year income tax, not a final tax, so a labour-only builder still files a return and claims expenses against gross income. Keeping the IR330C and every buyer-created or contractor invoice is essential to reconcile the withholding.

Provisional tax

Once a trade business is established, Inland Revenue asks for provisional tax: income tax paid in instalments during the year rather than in one lump sum. The trigger is having residual income tax of more than $5,000 in the prior year ^[3] .

GST

You must register for GST once turnover passes $60,000 in any 12-month period ^[3] . A registered tradie charges 15% GST and claims it back on tools, materials, fuel, and other business costs through GST returns; the mechanics are in the New Zealand GST guide. The common slip is claiming the full GST on an asset that has private use, when the claim should follow the business-use share.

Vehicles and travel

Inland Revenue allows three ways to claim vehicle costs ^[4] :

A vehicle used only for the business can claim the full running costs ^[4] . The claim mileage in New Zealand guide covers the kilometre-rate alternative for lighter business use.

Tools, protective gear, and consumables

Hand tools, power tools, and consumables used in the business are deductible. Protective clothing and safety equipment (boots, hi-vis, hard hats, wet-weather gear) are deductible because the work requires them; ordinary clothing is not. Larger plant is capital and is depreciated rather than expensed, with the deduction spread over the asset’s life.

Low-value assets can usually be written off in full in the year of purchase rather than depreciated, which suits a trade business that buys a steady stream of small tools. Keep the receipt against each purchase so the business-use share is evidenced and the write-off is defensible. Anything bought for mixed business and private use is apportioned, and the same apportionment carries through to the GST claim, so getting the split right once at capture saves untangling it twice later.

Where ExpenseFlow fits

The NZ trade headache is reconciliation: schedular withholding, provisional instalments, and GST credits must all tie back to documents that are easy to lose on a busy site. ExpenseFlow captures each receipt and supplier invoice, extracts the GST and line detail, codes it, and syncs the transaction into Xero or QuickBooks Online with the image attached, building the seven-year record archive as a by-product. It surfaces the figures you need for GST returns and the end-of-year reconciliation; it does not file your returns or set your withholding rate.

Common mistakes

• Not completing an IR330C, so withholding defaults to 20% when a lower correct rate was available ^[2] .
• Treating schedular withholding as a final tax and skipping the income tax return where expenses are claimed ^[1] .
• Being surprised by provisional tax after the first profitable year ^[3] .
• Claiming the full GST on a vehicle or tool with private use.