IR330C Schedular Payments NZ: How Contractors, Freelancers & Consultants Set Their WT Rate or 0% Exemption (2026–27)

Short answer: Under Inland Revenue’s IR330C schedular payments NZ rules, self-employed contractors, construction subcontractors, freelance creatives, and real estate or commission agents receiving schedular payments (tax code WT) must hand a completed Form IR330C to their payer before their first invoice is paid—or face a mandatory 45% no-notification withholding deduction. On Form IR330C, you can use your industry’s standard rate (typically 15% to 25%), elect any higher rate, choose a rate down to the 10% minimum for residents, or apply in myIR for a 0% Tailored Tax Rate certificate.

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What Are IR330C Schedular Payments in New Zealand and Who Do They Apply To?

According to official Inland Revenue (IRD) Form IR330C and Schedular Payment rules, a schedular payment is a contract payment for work or services (not wages or salary) from which the payer must deduct withholding tax (WT) before paying your invoice, unless you hold a 0% exemption certificate.

The ir330c schedular payments nz regime covers all three pillars of independent workers in New Zealand:

1. Trades & Construction Subcontractors: Labour-only building, carpentry, electrical, plumbing, roofing, painting, roading, forestry, and commercial cleaning contractors (20% standard WT rate).
2. Freelancers & Creative / Media Pros: Television, film, video production, commercial photography, modelling, journalism, and performing arts freelancers (20% to 25% standard WT rate).
3. Consultants, Commission Agents & Labour-Hire Contractors: Real estate salespersons, insurance/commission agents (20% standard WT rate), contractors placed through recruitment/IT labour-hire agencies (20% standard WT rate), and any independent consultant who enters a Voluntary Schedular Payment Agreement with a corporate client.

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Complete Table of IR330C Tax Rates: Standard Rate vs Elected Rate (10% Min) vs 45% Penalty

Since the schedular payment reforms under Schedule 4 of the Income Tax Act 2007, New Zealand contractors are no longer locked into a rigid industry rate. When you fill in Form IR330C, you have four rate choices:

IR330C Rate Option	Withholding Tax (WT) Rate Deducted	Who Qualifies & When to Use It
1. Standard Industry Rate	15%, 20%, or 25% (most trades, IT labour-hire, real estate & film/video = 20%)	Default rate printed on the back of Form IR330C if you leave the elected-rate box blank
2. Contractor-Elected Rate (Resident Min 10%)	Any whole percentage from 10% up to 100% (15% min for non-residents / temporary entry class)	Best for contractors with high deductible ute/tool/equipment expenses whose true effective tax rate on net profit is closer to 10%–14%
3. Tailored Tax Rate / 0% Exemption (IR23BS)	0% (or custom < 10% rate) approved by IRD	Best for established GST-registered sole traders with good IRD compliance who prefer to manage their own tax and Provisional Tax in Keel
4. No-Notification Penalty Rate (No IR330C Given)	45% mandatory deduction	Triggered automatically if you fail to give your payer a signed Form IR330C containing your name and IRD number before payment

(Note: If you changed your elected rate on Form IR330C twice with the same payer within a 12-month period, you need the payer’s consent for a third change in that same year.)

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How Do You Calculate 15% GST and IR330C Withholding Tax on the Same NZ Invoice?

The #1 invoicing mistake made by GST-registered Kiwi tradies, video producers, and labour-hire consultants is calculating the WT deduction after adding 15% GST. Under IRD rules:

• 15% GST is calculated on the GST-exclusive gross fee (Gross × 0.15).
• IR330C Withholding Tax (WT) is ALSO calculated strictly on the GST-exclusive gross fee (Gross × WT%)—never on the GST portion!

================================================================================
              TAXABLE SUPPLY INFORMATION (SCHEDULAR PAYMENT INVOICE)
================================================================================
FROM:                                      BILL TO (HEAD CONTRACTOR / PAYER):
Kauri Coast Carpentry (Sole Trader)        Southern Cross Builders Ltd
IRD / GST Number: 128-XXX-XXX              NZBN: 942904XXXXXXX
NZBN: 942905XXXXXXX                        Tax Code Provided on IR330C: WT (15%)

INVOICE NUMBER:   INV-2026-089             ISSUE DATE: 2 November 2026
================================================================================
DESCRIPTION                                     QTY      RATE (NZD)   LINE TOTAL
--------------------------------------------------------------------------------
1. Labour-Only Framing & Roof Truss Fix        40.0 hrs     $75.00     $3,000.00
   - Lot 14 Millwater Site (26–30 Oct 2026)
--------------------------------------------------------------------------------
                                           SUBTOTAL (EXCL. GST):       $3,000.00
                                           PLUS 15% GST ($3,000 × 15%): +$450.00
                                           TOTAL TAXABLE SUPPLY:       $3,450.00
                                           LESS IR330C WT (15% OF EX-GST
                                           $3,000.00):                  -$450.00
                                           --------------------------------------
                                           NET CASH PAYABLE TO BANK:   $3,000.00
================================================================================

Notice the elegance of electing a 15% WT rate on Form IR330C when you are GST-registered: the +15% GST (+$450) and the -15% WT (-$450) cancel each other out dollar-for-dollar, so the payer transfers the exact ex-GST subtotal ($3,000) to your bank account while forwarding $450 of prepaid income tax directly to your IRD account!

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When Should a Kiwi Contractor Apply for a 0% Tailored Tax Rate Certificate (Form IR23BS)?

If you have significant deductible overheads—such as commercial ute costs, workshop rent, subcontractor crew payments, or heavy camera and production equipment—having 20% deducted from your gross turnover can starve your working capital. Applying in myIR for a Tailored Tax Rate (Form IR23BS) allows IRD to issue a certificate reducing your withholding rate down to 0% (or a custom single-digit percentage) so you keep 100% of client payments in your bank account and pay tax on your true net profit instead.

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How Does IR330C Compare With Paying Hnry’s 1% + GST Fee?

Many Kiwi sole traders sign up for Hnry (1% + GST of gross income, capped at $1,500 + GST/year) simply because they want automatic tax deductions from client invoices. Yet if you work under ir330c schedular payments nz (or sign a Voluntary Schedular Payment Agreement on Form IR330C with your main B2B clients), your client’s payroll system deducts and sends your income tax to IRD for $0 fee, while Keel tracks your NZBN invoices, expense dockets, $1.17/km vehicle logbook, and GST101A / IR3 return worksheets on your iPhone with 0% cut of your income. See our Self-Employed Taxes in NZ Guide for full IR3 and ACC earner/work levy brackets.

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Frequently asked questions

Can I choose a 10% withholding tax rate on Form IR330C without asking IRD for permission? Yes! Provided you are a New Zealand tax resident (and IRD has not issued a compulsory deduction notice for unpaid tax arrears), you can write any whole percentage from 10% to 100% in Box 8 of Form IR330C and hand it to your payer—no prior myIR application is required unless you want a rate below 10% (such as a 0% Tailored Tax Rate / Certificate of Exemption).

How do I apply for a 0% Tailored Tax Rate (Certificate of Exemption) from schedular payments? Log in to myIR, select your Income Tax account, and choose Apply for a tailored tax rate (or Form IR23BS). If you have a clean filing and payment history and you invoice through an established business structure or prefer to pay via Provisional Tax, IRD can issue a 0% Tailored Tax Rate certificate so your clients pay you 100% gross.

Does IR330C withholding tax cover my ACC levies and GST? No. Withholding tax (WT) deducted under Form IR330C only credits toward your Income Tax on your year-end IR3 return (and reduces or eliminates your Provisional Tax liability). You are still responsible for paying your ACC CoverPlus / self-employed invoice and—if registered—filing and paying your 15% GST (GST101A).

What happens if too much withholding tax was deducted on my IR330C during the year? Because WT is a credit against your final IR3 income tax calculation after subtracting all your business expenses (tools, $1.17/km Tier 1 vehicle logbook, home office, insurance, and phone), any excess WT deducted above your true tax bill on net profit is refunded to your bank account by Inland Revenue after you file your IR3 return after 31 March.

Can I use Form IR330C if my profession is not listed on the standard schedule? Yes. Any self-employed freelancer, management consultant, designer, or contractor in New Zealand can enter a Voluntary Schedular Payment Agreement by ticking the voluntary agreement box on Form IR330C, provided your client agrees in writing to deduct and remit WT on your invoices.

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