How to File Your IRD Tax Return Online via myIR

What is a Tax Return?

An IRD tax return is your annual summary of income, deductions, and tax paid to the Inland Revenue Department. It allows IRD to calculate whether you owe more tax or are entitled to a refund. Most people file their tax return online through the myIR portal.

Who Needs to File?

You may need to file a tax return if you:

• Are self-employed or a sole trader
• Receive rental income
• Earn income from overseas investments
• Have been asked by IRD to file
• Want to claim a tax refund
• Are a company, trust, or partnership

If you're a salary and wage earner with no other income and simple tax affairs, IRD may automatically assess your tax position using data from your employer, banks, and other institutions — you may not need to file a full return.

Step-by-Step Guide to Filing on myIR

1. Log in to myIR — Go to the IRD website and sign in to your myIR account. If you don't have one, you can register with your IRD number and email address.
2. Check your income summary — IRD pre-populates income information from your employer(s), banks, and other sources. Review it carefully for accuracy.
3. Add any missing income — If you have income that isn't showing (e.g. overseas income, freelance work, rental income), you must add it manually.
4. Claim deductions — If you're self-employed or have rental income, you can claim allowable expenses. Keep your receipts and records organised.
5. Review tax credits — Check if you're eligible for any tax credits such as donations, child support, or the independent earner tax credit.
6. Submit your return — Once you're satisfied everything is correct, submit your return electronically. You'll receive a confirmation from IRD.

Key Filing Deadlines for 2026

What Happens After You File?

After you submit your return, IRD will process it and send you a notice of assessment. This will tell you:

• Your total taxable income
• Your total tax liability
• Any tax already paid (through PAYE, RWT, etc.)
• The balance — either a refund owed to you or an amount you need to pay

Refunds are usually processed within 10 working days if filed electronically.

How to Check Your Refund Status

You can check the status of your refund at any time through myIR. Log in and look under the 'Returns and transactions' section for your most recent assessment. If a refund is approved, it will be deposited directly into your nominated bank account.

Common Mistakes to Avoid

• Missing income — Forgetting to declare all income sources, especially overseas or freelance earnings
• Incorrect bank account details — Double-check your account number for refunds
• Missing the deadline — Late filing can result in penalties and interest
• Overlooking deductions — If you're self-employed, you may be entitled to deduct genuine business expenses

Understanding Your Notice of Assessment

Once IRD processes your return, you receive a notice of assessment in myIR showing how your tax was calculated: your total income, deductions, tax credits, tax already paid (PAYE, RWT, resident withholding tax on interest), and the resulting refund or amount owing. A refund is usually paid into your bank account within 10 working days of filing electronically; if you owe money, the due date is shown on the assessment and late payment interest accrues from the day after it falls due. If you disagree with the assessment, you can ask IRD to reassess within the four-month statutory period, or file a notice of proposed adjustment (NOPA) — most disputes are resolved by simply contacting IRD through myIR first.

What Happens If You Miss the Deadline

Filing late triggers a late filing penalty of $50 immediately, plus $4 per day up to a maximum of $1,000. Paying late triggers a late payment penalty of 1% on the day after the due date, a further 4% after seven days, then 1% on the 15th day of each following month — plus use-of-money interest (8.72% per annum for the 2025/26 year) on the outstanding amount. If your return is late but you are owed a refund, no penalties apply, but IRD may still contact you about the missing return. If you cannot pay in full, contact IRD early: instalment arrangements are available, and penalties are often waived for taxpayers who engage with IRD before the debt escalates.

Related Guides

• IRD Tax Refunds - when they are paid and what delays them
• NZ Tax System Explained
• PAYE Guide
• Self-Employed Tax Guide
• NZ Tax Credits
• Tax Year Calendar
• KiwiSaver and Tax
• Trusts and Estates Tax
• IR10 Guide — adding the Financial Statements Summary to your return