Submit your CIS Monthly Return (CIS 300)

Summary

How to submit your monthly CIS Return in Sage Accounting.

Description

Before you can create CIS transactions or submit CIS Returns, you must set up CIS for your business. Only paid CIS invoices appear on the monthly return.

Your monthly CIS obligations

Each month, you must:

  • Tell HMRC about payments you've made to subcontractors through your monthly return
  • If you make deductions, send a payment and deduction statement within 13 days of the tax month end

Resolution

Deadlines

Send your monthly returns to HMRC by the 19th of the following month if paying by cheque, or the 22nd for electronic payments.  HMRC charges a penalty if you miss the filing deadline.

▼ Create and submit your monthly return

Make sure all your CIS transactions are correct for the period you need to submit, then follow the steps below:

  1. Go to Reports, then select All reports.
  2. Under Construction Industry Scheme Reports, select CIS Monthly Returns.
  3. Select Create CIS Return.
  4. Choose the correct From date and select Continue.
  5. A new tab opens with the CIS Return Details.
  6. Select Create CIS Return again and check the transactions.

    NOTE:

    If you're submitting the return outside of Sage, select Mark as Manual Submission. 

  7. Select Subcontractor Statements from the Export dropdown to review before submitting.
  8. After reviewing, select Submit to HMRC.
  9. Check the Terms & Conditions box and select Submit.
  10. Enter your HMRC credentials and select Sign in & Submit.

HMRC can take a few minutes to respond. When your return submits successfully, you get a confirmation message.

If you don't get a response within five minutes, Sage Accounting returns you to the CIS Monthly Returns List. Refresh the screen for updates.

If your submission fails, select Close and try again. For more information, read CIS Return submission errors.

▼ Resubmit a return

If you've submitted CIS transactions incorrectly or missed transactions, read resubmit a CIS submission.

Related Solutions

Solution Properties

Solution ID
222001000101291
Last Modified Date
Wed Aug 12 10:38:33 UTC 2026
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