Tax Bill From IRD: Why You Owe Tax and What to Do Next

Q: Why did I get a tax bill from IRD?

You may receive a tax bill from IRD when the tax already paid during the year is less than your final tax liability. Common causes include incorrect tax codes, multiple income sources, changes in income and incorrect investment tax rates.

Understanding an IRD Tax Bill

A tax bill from IRD generally means the amount of tax already paid during the year was less than your final income tax liability. This can happen because of an incorrect tax code, multiple income sources, changes in income, incorrect investment tax rates or other taxable income.

Receiving an IRD tax bill does not automatically mean you have done something wrong. Inland Revenue assesses your income and tax information to determine your final tax position.

If your assessment shows tax to pay, check the calculation, confirm the payment due date and make arrangements to pay. If you cannot pay the full amount, an instalment arrangement or other relief may be available depending on your circumstances.

Quick answer: An IRD tax bill usually occurs when the tax already deducted or paid during the year does not cover your final tax liability. Common causes include incorrect tax codes, multiple jobs, changes in income and incorrectly taxed investment or other income.

Got an Unexpected Tax Bill From IRD? Here’s What It Means

Receiving a tax bill from IRD can be confusing, especially when tax has already been deducted from your salary through PAYE.

However, the tax deducted throughout the year is not necessarily the same as your final annual tax liability.

After the tax year ends, Inland Revenue can assess your income and the tax already paid to determine whether you have:

paid the correct amount
overpaid and are due a refund
underpaid and have tax to pay

The New Zealand income tax year runs from 1 April to 31 March.

If your assessment shows an amount owing, the first step is to understand why the tax is payable rather than assuming that an error has occurred.

What Is an IRD Tax Bill?

An IRD tax bill is an amount Inland Revenue says you need to pay after your income tax position has been assessed.

In simple terms, it usually means your final tax liability was higher than the amount of tax already paid during the year.

For employees, PAYE is normally deducted from wages. However, other income and changes in circumstances can affect the final calculation.

You may have tax to pay if you:

have more than one job
use an incorrect tax code
receive investment income
earn contracting or other taxable income
experience a significant change in income
receive certain payments or benefits
have tax deducted at an incorrect rate

Why Do You Owe Tax to IRD?

There are several reasons why Inland Revenue may calculate additional tax after the end of the year.

1. Your Income Changed During the Year

If your income increased significantly, the tax deducted earlier in the year may not have been enough to cover your final liability.

A promotion, salary increase, bonus, new job or additional income source can affect your annual tax position.

2. You Used the Wrong Tax Code

Your tax code helps your employer or income payer determine how much tax should be deducted.

Using an incorrect code can result in too little tax being deducted and may leave you with an amount to pay after your assessment.

This is particularly important when you have more than one source of employment income.

Read our guide to Secondary Tax Codes in New Zealand.

3. You Had Multiple Income Sources

Having more than one income source can change your overall tax position.

You could have:

a main job
a second job
contracting income
investment income
rental income
other taxable income

If insufficient tax was paid on one of these income sources, your end-of-year assessment may show additional tax to pay.

4. The Wrong Investment Tax Rate Was Used

Investment income such as interest, dividends or PIE income can be subject to specific tax rates.

If the wrong RWT or PIR was used, the amount deducted during the year may not match your final liability.

This can create an unexpected amount owing after your assessment.

5. Some Income Was Not Taxed Correctly

Certain types of income may not have had enough tax deducted before you received them.

Examples can include some schedular payments and employer share scheme income.

If insufficient tax was paid, Inland Revenue can calculate the additional amount after the tax year.

6. Your Tax Credit Circumstances Changed

Some tax credits depend on your annual income or personal circumstances.

If your circumstances changed during the year, your final assessment may result in additional tax being payable.

Can Having Two Jobs Cause You to Owe More Tax?

Yes. Having two jobs can contribute to an unexpected tax bill if the appropriate tax code is not used.

When you have multiple jobs, your total expected income is important when determining how your employment income should be taxed.

For example, imagine someone earns $60,000 from their main job and $15,000 from a second job. Their total income is $75,000.

If the incorrect tax code is used, insufficient tax may be deducted from the additional employment income.

This may result in additional tax being payable after the end-of-year assessment.

Related resource: Secondary Tax Code NZ

Why Do I Owe Tax If PAYE Was Already Deducted?

This is one of the most common questions people ask when they receive a tax bill from IRD.

PAYE is tax deducted from your salary or wages during the year. It does not necessarily guarantee that your final annual tax liability has been fully paid.

Your final position can be affected by:

salary increases
multiple employers
incorrect tax codes
investment income
other taxable income
incorrect withholding rates
certain tax credits

Therefore, owing tax does not necessarily mean your employer failed to deduct PAYE.

How Do I Check Why I Owe IRD Money?

If you receive a tax bill from IRD and do not understand the amount, review your income tax assessment through myIR.

Step 1: Log in to myIR

Open your myIR account and locate your income tax assessment.

Step 2: Check Your Income

Compare the income shown in your assessment with the income you actually received.

Step 3: Check Your Tax Already Paid

Review PAYE, withholding tax and other tax amounts already paid.

Step 4: Check Other Income

Look for interest, dividends, PIE income, contracting income, secondary employment and other taxable income.

Step 5: Review Your Tax Code

If you had multiple jobs, check whether the appropriate tax code was used.

Step 6: Contact Inland Revenue if Necessary

If something appears incorrect or missing, contact IRD or send a message through myIR.

Understanding your assessment can help you determine exactly why an amount is owing.

When Is Your Tax Payment Due?

The payment date depends on your circumstances and the due date shown on your income tax assessment.

For many individuals, the standard payment date is 7 February of the following year.

If you have a tax agent and qualify for an extension of time, the payment date may be 7 April.

Always check the due date shown by Inland Revenue because individual circumstances can affect when payment is required.

What If You Cannot Pay Your Tax Bill?

If you cannot afford to pay your tax bill from IRD in full by the due date, do not ignore the amount owing.

IRD provides options for people who cannot immediately pay their tax debt.

Instalment Arrangements

An instalment arrangement allows eligible taxpayers to repay their debt over an agreed period.

This can be useful if paying the entire amount at once would create financial difficulty.

Depending on your circumstances, payments may be arranged weekly, fortnightly or monthly.

Financial Relief

In some circumstances, taxpayers may be able to apply for financial relief.

Whether relief is available depends on your financial circumstances and the relevant IRD rules.

Can I Set Up an IRD Payment Plan?

If you cannot pay the full amount you owe, you may be able to request an instalment arrangement.

The arrangement can allow you to spread repayments over time rather than making one large payment.

Before requesting an arrangement, consider:

how much you can realistically afford
how often you can make payments
when you can begin repayments
whether you have other outstanding tax debt

An agreed payment arrangement can make managing tax debt more manageable.

What Happens If You Ignore an IRD Tax Bill?

Ignoring an amount owed to Inland Revenue can make the situation more difficult.

Late-payment penalties may apply after the relevant due date, and interest can also apply depending on the circumstances.

If you know you cannot pay your tax bill from IRD, it is generally better to investigate your options early rather than allowing the amount to remain unpaid.

Contact IRD or seek professional advice if you are unsure how to proceed.

Can IRD Write Off My Tax Bill?

Some tax amounts may qualify for automatic write-off under specific conditions.

However, not every tax bill will qualify.

There are specific rules surrounding automatic write-offs, including circumstances involving incorrect tax codes or tax rates.

You should therefore check the applicable IRD rules rather than assuming that an amount owing will automatically be cancelled.

Will an IRD Tax Bill Mean I Have to Pay Provisional Tax?

It can.

If your residual income tax is more than the applicable threshold, you may need to start paying provisional tax.

IRD currently states that provisional tax generally applies when residual income tax is more than $5,000.

This means a large end-of-year tax liability can also affect your tax payments during the following year.

How Can I Avoid an Unexpected Tax Bill?

You cannot always prevent an unexpected tax bill, but keeping your tax information accurate can reduce the risk.

Check Your Tax Code

Make sure the correct tax code is being used for your employment income.

Review Your Income

If your salary changes, you start another job or you receive additional income, review your tax position.

Check Investment Tax Rates

Make sure the appropriate RWT or PIR is being applied where relevant.

Keep Records

Keep records of income that does not come through your regular salary.

Check myIR

Regularly review important tax information and notices in your myIR account.

Why You Might Receive an IRD Tax Bill: Examples

Example 1: Two Jobs

Sarah earns $60,000 from her main job and $15,000 from a second job. If the incorrect tax code is used for the second job, not enough tax may be deducted.

Her end-of-year assessment could therefore show additional tax to pay.

Example 2: Salary Increase

John receives a substantial salary increase during the year. His tax deductions earlier in the year were based on his lower income.

His final annual tax calculation may therefore be higher than the tax already paid.

Example 3: Investment Income

Emma receives interest and PIE investment income but an incorrect tax rate was applied.

Her final assessment may show additional tax owing.

Example 4: Additional Income

Michael earns income from contracting alongside his regular employment. Not enough tax was paid on the additional income during the year.

His assessment can therefore result in a tax bill from IRD.

What Is the Difference Between an IRD Tax Bill and Tax Debt?

An IRD tax bill is an amount shown as tax to pay after your assessment.

Tax debt generally refers to money owed to Inland Revenue that remains unpaid.

If you pay your tax bill by the applicable due date, it does not necessarily become overdue debt.

If you cannot pay, you should consider the available payment arrangements before the amount becomes overdue.

Need Professional Help With Your NZ Tax Position?

If your tax bill from IRD is larger than expected, you have several income sources or you are unsure how your tax position was calculated, professional tax advice may help.

DFK Orb360 O’Halloran provides accounting, tax advisory and compliance services for individuals and businesses across New Zealand.

Learn more about their tax advisory services:

DFK Orb360 O’Halloran – Tax Advisory Services New Zealand

You can also explore:

DFK Orb360 O’Halloran – Tax Expert NZ

For tax return assistance:

DFK Orb360 O’Halloran – Tax Return Services Auckland

IRD Tax Bill: Quick Answers

Question	Quick Answer
Why do I owe IRD money?	Your final tax liability may be higher than the tax already paid.
Can two jobs cause an IRD tax bill?	Yes, particularly if the wrong tax code is used.
Why do I owe tax if PAYE was deducted?	Other income or changes in circumstances can affect your final tax position.
Can I pay IRD in instalments?	An instalment arrangement may be available if you cannot pay in full.
Can IRD write off tax?	Some amounts may qualify under specific write-off rules.
Can an incorrect tax code cause additional tax?	Yes.
Can investment income affect my tax?	Yes. Incorrect RWT or PIR can result in additional tax.
When can provisional tax apply?	Generally when residual income tax exceeds $5,000.

Final Takeaway: What to Do If You Owe Tax to IRD

Receiving a tax bill from IRD does not automatically mean that you have made a mistake. It means your income tax assessment shows that additional tax is payable.

Start by checking:

your total income
PAYE and other tax deductions
your tax codes
secondary employment
investment income
other taxable income
tax credits
the amount owing
the payment due date

If the assessment is correct, arrange payment by the due date. If you cannot pay the full amount, look into an instalment arrangement or other options available through Inland Revenue.

For complicated tax situations, multiple income sources, business income or a significant amount owing, professional tax advice can help you understand your obligations and available options.

Related IRD Tax Guides

Official IRD Resources

Tax Information Disclaimer

This article provides general information about New Zealand tax bills, income tax assessments and Inland Revenue processes. It is not personalised tax, accounting or financial advice.

Tax rules, thresholds, payment dates and Inland Revenue processes can change. Always check the latest information from IRD or speak with a qualified tax professional before making decisions about your tax obligations.

Why Did I Get a Tax Bill From IRD? NZ Tax Bill Explained