Introduction
Starting your first corporate tax season raises a number of practical questions: when do you file, what records do you need, and how do IRAS and ACRA requirements interact? This article, How to Plan Your First Corporate Tax Season as a New Company, summarises the key rules and a step-by-step approach for new companies in Singapore.
Understanding the reporting deadlines, GST and payroll obligations, and the role of a corporate secretary in Singapore will help you meet compliance obligations efficiently and avoid penalties. Raffles Corporate Services can assist with filings, compliance, accounting, tax and payroll support where required.
Who this applies to
This guide is intended for directors, officers and founders of newly incorporated companies in Singapore, including private companies limited by shares that have recently completed company incorporation Singapore.
- New private limited companies registered with ACRA
- Foreign companies with a Singapore branch or subsidiary
- Businesses that have recently begun operations and will soon have payroll, GST or corporate tax obligations
Key rules and requirements in Singapore
Singapore’s corporate compliance landscape involves multiple authorities. The main requirements for corporate tax season come from IRAS, ACRA and, for employment matters, MOM.
- ACRA: Company incorporation, changes in officers and Annual Returns are filed via the ACRA BizFile+ portal in accordance with the Companies Act.
- IRAS: Corporate Income Tax (CIT) filing obligations, estimated chargeable income (ECI) reporting, Form C-S/C filing via the myTax Portal, and GST registration/returns where applicable.
- Financial Year End (FYE): Your company’s chosen FYE determines tax filing timelines and the first set of accounts to prepare.
- Payroll: CPF contributions, Singapore payroll reporting, and withholding for foreign payments where applicable. Employment-related rules (Employment Act, Employment Pass, S Pass, Work Permit) affect payroll and benefits.
- Records: Maintain accounting records, receipts and supporting documents for at least five years to satisfy IRAS and ACRA audit or verification requests.
Step-by-step process
Follow these steps to plan for your first corporate tax season.
1. Confirm your Financial Year End
Choose and confirm your FYE when incorporating or as soon as practical. Your FYE determines the accounting period for which you prepare financial statements and when IRAS expects your corporate tax submissions.
2. Prepare accounting records and financial statements
Ensure bookkeeping is up to date and prepare management and statutory financial statements for the FYE. If you are VAT-registered (GST), reconcile GST on supplies and purchases.
3. Report Estimated Chargeable Income (ECI)
If your company’s revenue is more than S$5,000 in the basis period, you must submit ECI to IRAS within three months after the FYE unless exempt. ECI is used to calculate instalment payments and preliminary tax matters.
4. File Form C-S / C
For most small companies that meet qualifying conditions, Form C-S (or C-S (Lite)) can be filed electronically via IRAS myTax Portal. Larger or non-qualifying companies must file Form C with full supporting statements, typically within 3 months of the FYE if e-filing, or 4 months for paper filing.
5. Complete corporate income tax payment
After IRAS issues the Notice of Assessment, pay any tax due by the specified date. If you fall into instalment schemes, ensure payments are made according to the schedule.
6. GST, payroll and CPF compliance
If GST-registered, file GST returns on time. For payroll, ensure CPF contributions are calculated correctly and submitted by the 14th of the following month. Meet MOM obligations for employment passes and work permits.
Common mistakes to avoid
- Missing the ECI deadline—this can affect instalment calculations and lead to penalties.
- Poor record-keeping—insufficient documentation may trigger IRAS queries or audits.
- Incorrect FYE alignment—changing FYE without proper notification complicates tax computations.
- Assuming Form C-S eligibility—some start-ups do not qualify and must prepare full financial statements.
- Overlooking GST or payroll registration thresholds—late registration can lead to backdated liabilities.
Practical examples
These short examples illustrate common scenarios new companies face when preparing for their first corporate tax season in Singapore.
Example 1: Small trading company with simple accounts
A company incorporated in March chooses a 31 December FYE. It has straightforward revenues and meets the conditions for Form C-S. The company files ECI within three months after the FYE and submits Form C-S via IRAS myTax Portal, with accounts prepared by its accountant.
Example 2: Tech start-up with investor funding
A tech start-up receives seed funding and hires staff under Employment Pass and S Pass arrangements. It must ensure accurate payroll processing, timely CPF contributions for eligible employees, and confirm whether any R&D tax incentives apply. The company liaises with its corporate secretary and tax adviser to prepare Form C and associated financial statements.
Example 3: Company exceeding GST threshold
A newly incorporated import-export business exceeds the mandatory GST registration threshold and registers for GST. It must file GST returns and ensure that its bookkeeping separately captures taxable and exempt supplies for GST reporting.
How a corporate secretary can help
A corporate secretary in Singapore plays a practical role beyond statutory filings under the Companies Act. They help ensure governance and compliance are aligned with tax obligations.
- Maintaining statutory registers and filing Annual Returns on ACRA BizFile+.
- Coordinating preparation of financial statements required for Form C filing.
- Assisting with ECI submissions, GST registration, and payroll setup including CPF calculations.
- Advising on timelines, deadlines and the implications of director or shareholder changes.
Raffles Corporate Services can support companies with these tasks, including compliance filings, accounting and payroll services to help reduce administrative burden.
Frequently Asked Questions
When is my first corporate tax return due?
Your first corporate tax return (Form C or C-S) is due based on your company’s FYE. Once IRAS issues the Form C or Form C-S filing notification, typical e-filing deadlines are three months after the FYE for Form C-S; always check IRAS timelines on the myTax Portal.
Do I always need to file ECI?
Not always. ECI filing is required for companies with revenue above certain thresholds or those not exempted. Generally, if your company has assessable income, check IRAS guidance to see if you must submit ECI within three months after the FYE.
What records should I keep and for how long?
Keep all accounting records, invoices, bank statements and supporting documents for at least five years. These records support tax filings and may be requested by IRAS or ACRA for verification.
Can Raffles help with GST and payroll setup?
Yes—Raffles Corporate Services offers support with GST registration and filing, payroll implementation, CPF calculations and ongoing payroll administration in line with Singapore law.
Key takeaways
- Decide and confirm your Financial Year End early; it determines filing timelines.
- Maintain accurate accounting records and prepare statutory financial statements for Form C filing where required.
- Submit ECI within three months after FYE if applicable, and file Form C or C-S via IRAS myTax Portal on time.
- Ensure GST registration and payroll (CPF) obligations are met to avoid penalties.
- Engage a corporate secretary and tax/accounting advisers to streamline compliance and filings.
If you would like to find out more about how Raffles Corporate Services can assist with your company’s compliance and corporate secretarial requirements, please get in touch with the team at [email protected].
Yours sincerely,
The editorial team at Raffles Corporate Services
Requirements may change, so always check the latest guidance from ACRA, IRAS or MOM, or consult a professional adviser.
Disclaimer: This does not constitute legal advice. If you require legal advice, please contact a lawyer.