Monthly Return

All Contractors must complete and submit a monthly return (CIS300) to HMRC regardless of whether or not you have actually made payments in the preceding month. This monthly return must contain details of all payments made to all subcontractors regardless of their tax treatment.  

The monthly return runs from the 06th of month one to 05th of month two and must be filed with HMRC by the 19th of month two (or 22nd if payment is being made electronically).

For example:

For the tax month 06th April to 05th May the monthly return must be submitted by the 19th May.  If no payments have been made a nil return must still be submitted by the required deadline.


Weekly and Monthly Payment Run

Payments can be processed on a tax weekly and/or tax monthly basis at the users discretion. While both payment runs operate independently of each other the records are merged for verification requests and monthly returns to HMRC.

Accessing the Monthly Return

When all payments for the tax month have been finalised, BrightPay will offer to create a CIS300 monthly return for submitting to HMRC. The CIS300 informs HMRC of the payments made to subcontractors in the tax month.




To manually create the CIS300 Monthly Return

Simply select 'CIS' on the menu toolbar.

1) Choose 'Submissions'

2) Click 'New' on the menu toolbar and select 'CIS 300 Monthly Return'


3) Select the appropriate tax month



There are three declarations to consider:


  • Employment status has been considered for all subcontractors and contracts are not contracts of employment


  • All subcontractors have been verified with HMRC or included in CIS returns in this or the previous 2 years


  • The information given in this return is correct

This is the sole responsibility of the contractor.


4) If you know you’re not going to make any payments to subcontractors for up to 6 months, you should include this indicator in the return.

5) Click 'OK', the contents of the monthly return will be displayed on screen. The Monthly Return can be printed, emailed or exported at any time before or after its submission to HMRC.

6) BrightPay will indicate if a monthly return has no subcontractor payments i.e. a Nil return. It is important to tell HMRC that you have not made any payments to subcontractors during the tax month, this is done by making a nil declaration.

7) When ready to submit the Monthly Return to HMRC, click 'Send Now'.

8) Confirmation details will subsequently appear on screen to indicate that your submission has been accepted by HMRC.

9) Should your submission fail, simply click on 'Details' for more information on why your submission has been rejected by HMRC and make amendments where required.



Need help? Support is available at 0345 9390019 or

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