Withholding Tax Calculator NZ 2026/2027
Contractor take-home after schedular tax. Handles GST inclusive and exclusive invoices. Runs in your browser. No account.
What are Schedular Payments (Withholding Tax)?
If you are an independent contractor or freelancer in New Zealand, you may be subject to Withholding Tax. Inland Revenue calls this tax on Schedular Payments.
Unlike a standard employee on PAYE, contractors use a flat-rate deduction. When you issue an invoice, your client deducts a flat percentage and sends it to IRD. You receive the remaining net amount in your bank account.
Beware the "GST Trap"
One of the most common and costly mistakes new contractors make is calculating their withholding tax on the total invoice amount, including the GST. That is one of the traps we unpack in contractors vs employees: the GST trap.
Legally, withholding tax is only calculated on your Gross Income (the GST-exclusive amount). Our calculator automatically handles this, and the GST calculator can split 15% GST the same way. Create the tax invoice with the GST invoice generator. Here is exactly how it works if you invoice $1,000 + GST with a 20% tax rate:
- Base Rate: $1,000
- Add GST (15%): $150
- Total Invoice to Client: $1,150
- Withholding Tax Deducted: $200 (Calculated as 20% of the $1,000 base rate, not the $1,150).
- You Receive in Bank: $950
How to choose your tax rate (IR330C)
When you start a new contract, your client is required to ask you to fill out an IR330C (Tax Rate Notification for Contractors). This form tells the client exactly what percentage to deduct from your pay.
While you can elect your own custom rate (down to a minimum of 10% for NZ residents, or 15% for non-residents and temporary visa holders), IRD provides standard baseline rates depending on your industry:
Crucial warning: If you fail to provide an IR330C to your payer, they must deduct tax at the no-notification rate of 45% (or 20% if you are a non-resident contractor company). See IRD deductions from payments to contractors. Director fees sit under GST on directors fees and honoraria, and creative freelancers can also check GST for content creators and the industry specific GST category.
What Happens to Student Loans & ACC?
Unlike standard PAYE workers, withholding tax only covers your core income tax. It does not automatically cover your other obligations.
As an independent contractor, you are essentially self-employed. Year-end tax is on profit after expenses, not on each invoice alone. Model that picture with the self-employed tax calculator, and read GST for contractors basics. This means:
- ACC levies: You will receive a separate bill from ACC each year for your earner's levy and working levy. For 2026/2027 the GST-inclusive earner's levy is 1.75% (cap $156,641).
- Student Loans: Your client will not deduct 12% for your student loan. The 2026/2027 threshold is still $24,128. You must make voluntary repayments to IRD, or pay a lump sum at year end.
- KiwiSaver: You must set up voluntary contributions directly with your provider. See the IRD KiwiSaver guide.
Claiming Expenses & Getting a Tax Refund
Because withholding tax is calculated on your Gross Income, it doesn't take into account the costs you incurred to run your business.
At the end of the financial year (31 March), you will file an IR3 Individual Income Tax Return. Declare your total gross income and deduct legitimate business expenses (home office, vehicle mileage, tools, software). This reduces your taxable profit. Expense claim detail sits in claiming GST on a car or home office and the business and expenses GST category. If IRD requires instalments, use the provisional tax calculator.
Because your clients have been withholding tax on gross income all year, you will often have overpaid once expenses are factored in, so IRD then issues a tax refund.
The three types of withholding tax in New Zealand
People search for a withholding tax calculator for a few different reasons, so it helps to know which one you actually need. In New Zealand there are three main withholding taxes, all administered by Inland Revenue. The calculator at the top of this page works out the first one, tax on schedular payments, but the rules for the other two are set out below so you can use the right rate.
- Schedular payments: a flat rate deducted from contractor invoices, covered by the tool above and the IRD schedular payments rules.
- Resident withholding tax (RWT): tax your bank or fund manager deducts from interest and dividends before it reaches you.
- Non-resident withholding tax (NRWT): tax withheld from New Zealand interest, dividends, and royalties paid to people or businesses overseas.
Resident withholding tax (RWT) on interest and dividends
If you have money in a New Zealand bank account, term deposit, or managed fund, your payer deducts resident withholding tax before paying you the interest. This is a separate system from schedular payments, but it is the answer most people want when they look for a resident withholding tax rate NZ calculator. You nominate the rate that matches your income tax rate, and your bank applies it. Pick a rate that is too low and you get a bill at year end; too high and Inland Revenue simply holds your money until you claim it back.
From 31 July 2024 the RWT rates on interest line up with the personal income tax brackets. If you have not given your payer your IRD number, tax is deducted at 45%. If you have given your IRD number but do not choose a rate, most people default to 33%. You can confirm your own position on the IRD using the right RWT rate page, and staff wages sit on the PAYE tax calculator instead.
A few extra rules are worth knowing. Companies that give their IRD number and company status may use 28%, 33%, or 39%, and 28% applies by default if no rate is chosen. Trustees and Maori authorities have their own options starting at 17.5%. Dividends are treated differently again: the RWT rate on dividends is a flat 33%, reduced by any imputation credits the company attaches. On a joint account you can only use one rate, so the highest earner usually picks the rate to avoid a surprise bill. To model the tax on the income behind the rate, the provisional tax calculator is a useful cross check for investors who pay in instalments.
Non-resident withholding tax (NRWT) on payments overseas
If your New Zealand business pays interest, dividends, or royalties to someone who lives overseas, you generally have to deduct non-resident withholding tax before the money leaves the country. Inland Revenue calls these payments non-resident passive income. As the payer you register for NRWT, deduct the correct amount, and send it to IRD. The detail sits on the IRD non-resident withholding tax page and in the IR291 payer guide.
Under New Zealand domestic law the standard NRWT rates are 15% on royalties, 15% on interest, and up to 30% on dividends, although a fully imputed dividend paid to a shareholder holding 10% or more can be 0% and a fully imputed dividend to a smaller shareholder is usually 15%. There is also an approved issuer levy option of 2% that can replace NRWT on some interest paid to unrelated overseas lenders. Most of these rates are then reduced by a double tax agreement. For example, a payment to an Australian resident is often withheld at 10% on interest and 5% on royalties. Because treaty relief depends on evidence of residence, cross-border payments usually need tailored advice before you settle on a rate.
A note on overseas withholding calculators
This is a New Zealand tool built on Inland Revenue rules, so it does not model overseas payroll systems. If you are looking for a federal or state income tax withholding calculator, a W-4 paycheck estimator, an ATO PAYG withholding calculator for Australia, a BIR withholding tax calculator for the Philippines, or a CRA non-resident withholding calculator for Canada, those belong to a different tax authority and use different brackets. For New Zealand income tax on wages, the PAYE tax calculator is the right starting point, and the GST calculator handles the 15% on your invoices.
Frequently Asked Questions
Is Withholding Tax the same as PAYE?
No. Use this page if your client deducts a flat rate from a contractor invoice (schedular payments). Use the PAYE tax calculator if you are on wages or salary with a tax code (M, ME, SB, and so on). PAYE changes with how much you earn in a pay period. Withholding is a flat percentage of the GST-exclusive amount as a prepayment toward your IR3 bill.
I invoice clients. Which tools do I use together?
Create the tax invoice with the GST invoice generator, check 15% GST on the GST calculator, then use this withholding calculator for what the payer should deduct. If IRD puts you on instalments later, use the provisional tax calculator.
Can I choose a 0% Withholding Tax rate?
Inland Revenue requires a Certificate of Exemption (IR331) if you want 0% deducted from your schedular payments. You must apply directly with IRD, proving you have a good record of filing returns and paying on time.
What if my Withholding Tax rate is too high?
If your expenses are high (meaning your actual profit is low), the standard 20% deduction might mean you are overpaying tax throughout the year. You can supply your client with a new IR330C electing a lower custom rate (minimum 10% for NZ residents, 15% for non-residents and temporary visa holders).
What resident withholding tax (RWT) rate should I choose?
Your RWT rate on interest should match your income tax rate: 10.5% up to $15,600, 17.5% to $53,500, 30% to $78,100, 33% to $180,000, and 39% above that. Companies may use 28%, 33%, or 39%. If you do not give your bank an IRD number, tax is deducted at 45%, and dividends are taxed at a flat 33%. Check your position on the IRD RWT rate page.
What is non-resident withholding tax (NRWT)?
NRWT is tax withheld from New Zealand interest, dividends, and royalties paid to non-residents. Standard domestic rates are 15% on interest and royalties and up to 30% on dividends, though fully imputed dividends and double tax agreements often reduce this. An approved issuer levy of 2% can replace NRWT on some interest. See the IRD NRWT guidance.
Other New Zealand tax calculators
Keepers for contractors and employers. No template farm or PAYE clones.
PAYE tax calculator · GST invoice generator · GST calculator · Provisional tax calculator · Register for GST
Official sources: IRD schedular payments · IR330C · IR331 exemption · Deductions from contractors
Invoice Pay Breakdown
Take-home pay summary • New Zealand • GSTCalc.nz