Known issues

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1 May 2025

National Insurance Calculation incorrect when using Table Method

We have been made aware of an issue with the National Insurance Calculation routine when using the Table method for the calculation. The issue means that some payrolls ran in 2025/26 will have slightly incorrect amounts calculated for Employees and Employers NI and a re-calculation of payroll is required.

For any companies using the Exact Method of calculating National Insurance, the calculation will be correct, and no further action is required

To check the calculation method used, in payroll select Settings > Application Data > Company Settings > NI Calculate Method:

For payroll frequencies that are Weekly, and have the NI Calculate Method set to table, calculations will only be incorrect for employees where earnings for Gross Niable are between the Secondary Threshold (ST) and Lower Earnings Limit (LEL) for the period.
If all employees Gross Niable pay for the period are either below the secondary threshold, or above the lower earnings limit, then National Insurance will be correct and no action is required

Pay Frequency

Secondary Threshold

Lower Earnings Limit

Weekly

97

125

2025/26 payrolls will need to be re-calculated in the following scenarios:

  • Weekly Pay Frequency set to calculate NI using the Table Method, and have employees paid between £97 and £125 in any payroll ran in 2025/26

  • Monthly, Fortnightly and Lunar pay frequencies set to calculate NI using the Table Method

There are two options for when to implement this workaround.

1. Change NI Calculate Method to 'Exact' and re-calculate payrolls now. If changing to the exact method, you will need to continue paying using this method for the rest of the tax year

2. Await the May release of Cascade, currently scheduled for May 14, keep NI Calculate Method as Table and re-calculate payrolls following the release

Workaround 1 – Changing NI Calculate method to Exact

This workaround can be implemented immediately

  1. Ensure you have an export of the Gross Pay Report for each period the payroll has been calculated so far in 2025/26
  2. Restore back to 1st period of tax year
  3. Change NI Calculate Method to Exact via Settings > Application Data > Company Details > Company Settings
  4. Re-Calculate Payrolls
  5. Export Gross Pay Report following the re-calculation of payroll
  6. Send FPS, selecting correction to previous submission if already sent for this period
  7. Submit EPS
  8. Period End
  9. For weekly, fortnightly and lunar payrolls, complete the above for all payrolls calculated in 2025/26
  10. Reconcile Gross Pay Reports from steps 1 and 5.
    1. Check Net Pay initially paid against Net Pay ran in re-calculate
    2. Work out the difference in Net Pay between the two periods
  11. Set up a pay element which is not subject to tax or NI
  12. Use this payment element to pay the employee the difference in Net Pay from Gross Pay Reports in your next payroll run
  13. Continue to calculate all future payrolls using the exact method

 


Workaround 2 – Keeping NI Calculate method as Table

Please wait until the May release of the software on 14th May prior to implementing this workaround

  1. Ensure you have Gross Pay Report for each period the payroll has been calculated so far in 2025/26
  2. Restore back to 1st period of tax year
  3. Re-Calculate Payrolls
  4. Export Gross Pay Report following the re-calculation of payroll
  5. Send FPS, selecting correction to previous submission if already sent for this period
  6. Submit EPS
  7. Period End
  8. For weekly, fortnightly and lunar payrolls, complete the above for all payrolls calculated in 2025/26
  9. Reconcile Gross Pay Reports
    1. Check Net Pay initially paid against Net Pay ran in re-calculate
    2. Work out the difference in Net Pay between the two periods
  10. Set up a payment which is not subject to tax or NI
  11. Use this payment element to pay the employee the difference in Net Pay from Gross Pay Reports in your next payroll run following the 14th May release
  12. Continue to calculate all future payrolls using the Table Method