Accurate, compliant, and stress-free tax filing handled by qualified accountants.
All Singapore companies must e-File their Corporate Income Tax Returns with IRAS using Form C-S, Form C-S (Lite), Form C, or Form for Dormant Company
The filing deadline for the Year of Assessment (YA) 2025 is 30 November 2025
Tax return covers income earned in the preceding financial year (Year of Assessment YA), reviewed by our Singapore tax advisors.
Best for: Founders who only need company registration and basic compliance
Best for: Businesses that want accounting and tax handled from the start.
Best for: Businesses that need full compliance plus a Singapore registered address
Corporate income tax filing comes standard with Sleek’s accounting solutions.
Anton Blockx | Finance Controller at the Board of Innovation APAC Pte Ltd
Amiya Patanaik
CEO & Co-Founder, Neurobit
“I recommend Sleek to almost all my entrepreneur friends. Whoever is starting a new company, I would say just go for it, one less thing to worry about.”
Navneet Kaur
Founder & CEO, Yours
“My company admin all managed in one place and I have one point of contact to make it super easy for me to manage it”
Expert tax advisors and accountants ensure your books are accurate, your reports are ready, and your filings are always on schedule.
Every submission is reviewed for accuracy and filed before the deadline to maintain full compliance.
Access every document securely in the cloud without chasing paper trails or email attachments.
One transparent price for all your accounting and taxation needs. No hidden fees or unexpected add-ons when you get our tax services Singapore.
Our built-in cloud platform keeps your accounts organized and up to date. No extra software required.
Tax Manager
Singapore
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Form C-S / Form C-S (Lite) / Form C (and Form for Dormant Company, if applicable) are corporate income tax returns that companies must e-file with IRAS each year. For YA 2025, the filing due date is 30 Nov 2025.
Form C-S is a simplified return with fewer fields than Form C. Form C-S (Lite) is for eligible small companies and has six essential fields. Companies must still prepare a tax computation (adjustments to accounting profit) before filing.
Companies that meet the above and have annual revenue ≤ S$200,000 may file Form C-S (Lite).
Failing to file your Corporate Income Tax Return by 30 Nov is an offence under the Income Tax Act and may result in penalties of up to S$5,000. IRAS may also issue an estimated Notice of Assessment (NOA), and payment is due within 1 month of the NOA date. Further enforcement action may follow for non-compliance.
You can simplify the process by contacting our experienced accountants for hassle-free filing.
Yes. All companies must file their Corporate Income Tax Return (Form C-S, Form C-S (Lite), or Form C) by 30 November 2025 for YA 2025, even if they were not profitable or had no revenue during the financial year.
Filing is still required because IRAS needs to confirm the company’s tax position for the year, including any losses that may be carried forward to offset future taxable profits.
The only exception is when a company is dormant (meaning it carried on no business and earned no income for the entire financial year) and IRAS has formally granted a waiver from filing. Dormant companies without a waiver must still file a simplified Form for Dormant Company.
100%. Our goal is to make the transition seamless for you. We’ll directly communicate with your current Singapore tax advisor or accounting service provider, assume responsibility for your financial documents, and conduct a thorough audit to ensure compliance. We’ll address any outstanding matters with IRAS and ACRA, organise historical data, and prepare and file the required Singapore reports. Moreover, we provide ongoing guidance on relevant tax exemptions, enabling you to optimize your tax strategy.
If your accounts are messy, during onboarding, our team will address it by doing an initial accounting review, using Sleek’s in-house accounting software, SleekBooks, in order to help you identify any issues and propose the best corrective measures. This process is known as a ‘Reconstruction of Accounts’ and is a necessary basis to ensure that when our clients join Sleek, your business and money accounts are in a position that is in accordance with Singapore Financial Reporting Standards (SFRS / SFRS for Small Entities).
After that, our accountant will welcome you on board with our hassle-free digital solutions and accounting services.
Leave us your email through the form above or phone us to speak to an accountant or sales for a free consultation on the price of our package or fee for our accounting services today.
Sleek’s accounting plans are priced according to the average monthly expenses of a company and based on a financial year period (not calendar year). A company’s FYE can be found publicly from ACRA’s website or on the First Directors Board Resolution. They can also search their UEN or Company Name on the Open Gov website.
We monitor a client’s monthly expenses over a financial year period and will adjust the final plan price based on the actual expenses resulting in a potential credit or debit based on the initial plan taken.
