Tips on e-Filing for Dormant Company

New! From 1 Sep 2018, CorpPass will be the only login method for online corporate transactions with the Government. You must first be authorised in CorpPass before you can log in to IRAS digital services. Follow the Step-by-Step Guides on how to register for CorpPass.



Before you e-File for Dormant Company

Before you use the "File Form C-S/ C for Dormant Company" e-Service to complete and e-File for dormant company, please do the following:

  1. Ensure that you have been duly authorised by the company as an "Approver" for “Corporate Tax (Filing and Applications)” in CorpPass.
  2. Ensure that you have the company's tax reference number, your CorpPass ID and CorpPass password.
  3. Set aside at least 5 minutes to complete this electronic tax return.

e-File Form for Dormant Company in 3 Simple Steps

Step 1: Ensure that you or the third party has been authorised as an "Approver"


The company will need to authorise its staff or a third party (e.g., tax agent) as an "Approver" for “Corporate Tax (Filing and Applications)" in CorpPass before they can e-File. For assistance on CorpPass setup, please refer to the relevant Step-by-Step Guides

    Step 2: Log in to myTax Portal


    1. Log in to
    2. (i) If you are logging in as a staff of the company:
      • Select Business Tax Matters; and

      • Key in yourOrganisation Tax Ref No, followed by your CorpPass ID and CorpPass password.

      (i) If you are logging in as a tax agent of the company:
      • Select Client Tax Matters; and

      • Key in yourTax Agent Tax Ref No, followed by your CorpPass ID and CorpPass password.

    Step 3: Submit the Completed Form Online


    1. Click on Corporate Tax and select File Form C-S/ C.
    2. Select the Year of Assessment you are filing, followed by Form for Dormant Company to begin completing the Form.
    3. Click on Confirmation Page to verify that the information declared is correct. Thereafter, complete the Declaration and fill in Details of Filer & Contact Person.
    4. Click on Submit.
    5. You will receive an instant acknowledgement upon successful filing.


    Points to Note when e-Filing

    Filing Deadline

    Your company enjoys the extended filing due date of 15 Dec, instead of 30 Nov, when you e-File for dormant company.

    Online Help

    Please click on the iHelp icon <  i2> should you require on-the-spot guidance as you e-File the Form for Dormant Company.


    Please do not leave your filing session idle for more than 20 minutes. Otherwise, the session will expire and you will be required to log in to the portal again. 

    Acknowledgement of Successful e-Filing

    Upon successful e-Filing, you will receive an instant acknowledgement of receipt. The same acknowledgement will also be available at under "View Corporate Tax Notices" e-Service.

    User Guides

    Detailed User Guides for:

     Frequently Asked Questions (FAQs)

     For more details on e-Filing for dormant company, please refer to our FAQs (681KB). 


    Contact Us

    Please contact us if you need assistance or clarification on e-Filing for dormant company:

    •  Email us via myTax Mail
    • IRAS Corporate Tax Helpline: 1800-356 8622 (8 a.m. to 5 p.m. from Mon to Fri)


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