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Tax Codes - Tips and Traps
  Tax calculation checklist - what to check if you think the tax is calculated incorrectly
  Monthly printed tax tables - the reason for small discrepancies

Tax Calculation Checklist


At the start of each financial year Ace Payroll receives a number of calls from clients unsure whether the tax is correctly calculated by the program. Here is a simple checklist.
Prior to advising please check the following


  • You are using an up to date version of Ace Payroll - currently 3.37A or later.

  • Check the pay date is after 1st October 2010.

  • Ensure you are referring to the correct printed tax tables, and not the previous years. The date is printed on the front cover.

  • Remember to round the gross down to the nearest lower figure in the printed tax tables. If the weekly gross is $350.99 you calculate tax on $350.

  • If comparing the tax deducted from the pay calculation screen in Ace Payroll, check the tax deduction is shown in black. If blue, then you have typed in the tax from the keyboard.

  • If your deduction is still incorrect after checking all the above, feel free to call the help desk.


Monthly Printed Tax Table Discrepancies


For monthly salaries, why is there a small discrepancy between the IRD printed tax tables, and the figures calculated by Ace Payroll?
This is the issue raised by our client


  • Their employees are paid Monthly and on the M code.

  • As an example, one earns $4,121 gross per month. Ace Payroll taxes this at $981.84, and the tax calculator on the IRD website also says $981.84.

  • The IRD Monthly Printed Tables show a lower amount.


IRD Response

When comparing the Payroll specifications calculations with our paper-based PAYE tax tables you will find a small variance, when the earnings of the employee are in between the value shown in the paper PAYE tax tables. We advise employers using manual payrolls that where the exact amount of earnings is not shown in the table to use the nearest lower gross value.

As the monthly tax tables gross earnings are in $5 increments using your example an employer using a manual payroll would deduct PAYE on $4,120 ($980.37).

The formulas used in our Payroll specification are more accurate and should be used by all employers using a computer software payroll package.

I confirm the calculation you have shown is correct when using a computer software payroll package.

Note: This answer was written by the IRD on 26th April 2004, and the answer is current as at 5th January 2010.

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  Taxing of holiday pay   Deduct tax at a specified percentage
  Overwriting PAYE deductions   Payroll software IRD compliance
  Overwriting default PAYE & student loan   Twice monthly PAYE returns
  Tax Code entry   Tax cuts in terms everyone can understand
  Alphabetical Index FAQ Questions FAQ Contents Back to top
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Updated: 30th June 2010
Published: 30th June 2010
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