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Forms C-S and C in Singapore: Applicability, process, and deadline

Discover the differences between Form C, C-S, and C-S Lite in Singapore. A step-by-step guide to corporate tax filing for SMEs and businesses.

Logan Jackonis
Logan JackonisHead of Services & Operations, Commenda
Fact Checked July 22, 2024|2 min read
Forms C-S and C in Singapore: Applicability, process, and deadline

Introduction to Form C-S/C

Form C-S/C is a tax declaration form required by the Inland Revenue Authority of Singapore (IRAS) for companies to declare their income. Companies are required to file either Form C-S or Form C depending on their revenue and whether they qualify for simplified filing.

Who needs to file form C-S/C?

  1. Form C-S: Small and newly incorporated companies that meet certain criteria such as having an annual revenue of less than S$5 million and only deriving income taxable at the prevailing corporate tax rate.
  2. Form C: Companies that do not qualify for Form C-S and have more complex tax matters or higher revenue.

What are the key components of form C-S/C?

  1. Financial Statements: Summary of key financial figures for the year.
  2. Tax Adjustments: Adjustments to financial statements for tax purposes.
  3. Declarations: Compliance declarations regarding transfer pricing and other tax obligations.

What is the deadline for filing form C-S/C?

The deadline for filing Form C-S/C is November 30 of the year following the financial year. For example, for the financial year ending on December 31, 2023, the filing deadline would be November 30, 2024.

What is the process for filing form C-S/C?

  1. Determine Eligibility: Confirm whether your company is eligible to file Form C-S or needs to file Form C.
  2. Prepare Financial Statements: Ensure your financial statements are ready and audited if applicable.
  3. Complete the Form: Fill out Form C-S or Form C with accurate financial information and tax adjustments.
  4. Submit Online: Login to IRAS’s myTax Portal and submit the form electronically before the deadline.

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About the author

Logan Jackonis

Logan Jackonis

Head of Services & Operations, Commenda

Logan leads Commenda’s Services and Operations team, helping controllers, heads of tax, and finance leaders navigate international expansion. He built a global expert network across 70 countries and previously worked in management consulting across the Middle East and Southeast Asia.

Disclaimer: Commenda and its affiliates do not provide tax, accounting, or legal advice. This material has been prepared for informational purposes only, and is not intended to provide or be relied on for tax, accounting, or legal advice. You should consult your own tax, accounting, and legal advisors before engaging in any related activities or transactions.