- Annual corporate tax return filed by 30 November as part of your compliance engagement.
- ECI submitted to IRAS within three months of financial year end.
- Named account manager handles your filing with full context from your accounts.
- Bookkeeping maintained on Xero, so tax inputs are always accurate and current.
- Same-day response time for IRAS queries and client questions.
Tax filing that starts where your books end
Most Singapore companies treat corporate tax as a separate problem to solve once a year, usually in a panic. The better approach is to have it handled by the same team that manages your bookkeeping and financial statements, because the inputs are the same. At Duellix, corporate tax is part of a broader accounting and compliance engagement, not a standalone transaction. Your named account manager already knows your numbers. Preparing the annual tax return due by 30 November and the Estimated Chargeable Income filing after year end is a natural extension of that work, not a fresh handover to someone who has never seen your accounts.
Two filings, one deadline you cannot miss
Singapore companies have two distinct corporate tax obligations each year. The first is the ECI filing, which estimates your chargeable income and must be submitted to IRAS within three months of your financial year end. The second is the full tax return (Form C or Form C-S), due by 30 November for the preceding year of assessment. Missing either filing triggers penalties from IRAS, and the consequences compound if both slip. Duellix tracks both deadlines as part of your engagement, so you are not relying on a calendar reminder to stay compliant.
A named account manager, not a rotating queue
One of the more frustrating parts of outsourced compliance is re-explaining your business every time a deadline approaches. Duellix assigns a named account manager to each client, and that person handles your tax filing with the context they have already built up through your bookkeeping and financial statements. Same-day response time means that when IRAS sends a query or when you have a question about your tax position, you are not waiting days for someone to pick up the thread. The account manager relationship is the product, not a feature.
Integrated with accounting and financial statements
Corporate tax cannot be filed accurately without reliable accounts. Duellix's tax service sits inside a full accounting engagement that includes bookkeeping on Xero and the preparation of unaudited financial statements. The tax computation draws directly from those statements, which means there is no reconciliation gap between what your books show and what gets filed with IRAS. For SMEs that also run payroll, the same engagement can cover payroll services alongside tax, keeping the compliance picture in one place rather than spread across multiple providers.
The account manager who knows your books is the same person who files your tax return, which is the entire point.
How corporate tax filing works at Duellix
Onboard through your preferred channel
Duellix builds the engagement around how you actually communicate, whether that is email, WhatsApp, or Slack. Your named account manager is introduced at the start, not after something goes wrong. From the first conversation, they are building the context they will need to file accurately on your behalf.
Bookkeeping and accounts are kept current
Your accounts are maintained on Xero throughout the year, which means the data needed for tax filing is always current, not assembled in a rush before a deadline. Unaudited financial statements are prepared from those accounts, forming the basis for the tax computation.
ECI filed within three months of year end
After your financial year closes, your account manager prepares and submits the ECI filing to IRAS within the required three-month window. This is the estimated chargeable income figure, and getting it right matters because it sets expectations with the tax authority before the full return is due.
Annual tax return prepared and submitted
The full tax return (Form C-S for smaller companies, Form C where required) is prepared from your finalised accounts and filed with IRAS by 30 November. Your account manager handles the computation, the filing, and any IRAS correspondence that follows.
Benefits
Deadlines tracked for you
Both the ECI (due within three months of year end) and the annual tax return due by 30 November are tracked and filed by your account manager. You do not need to monitor IRAS calendars or set your own reminders.
No reconciliation gap between books and tax
Because bookkeeping, financial statements, and tax filing are handled by the same team on the same Xero data, the numbers filed with IRAS match your accounts exactly, with no translation layer between providers.
Same-day response on tax queries
When IRAS sends a query or you have a question about your tax position, your named account manager responds the same day, not after a ticket queue clears.
One engagement, full compliance picture
Corporate tax sits inside a broader engagement that can include bookkeeping, financial statements, and payroll, so your compliance obligations are managed in one place rather than split across multiple providers.
Who this service fits
Singapore SME with existing bookkeeping engagement
A local SME already using Duellix for bookkeeping and financial statements adds corporate tax filing to the same engagement. The account manager already has the accounts, so there is no duplication of effort and no risk of the tax return reflecting numbers that differ from the audited books. Both the ECI and the annual return due by 30 November are handled without the founders needing to track the deadlines themselves.
Overseas founder running a Singapore entity remotely
A founder who incorporated a Singapore company remotely and does not have local staff to manage compliance uses Duellix to handle the full administrative picture: bookkeeping, financial statements, and corporate tax. With a named account manager and same-day response time, the founder gets answers to tax questions without needing to navigate IRAS directly or hire locally. The service also integrates with payroll services if the company has Singapore-based employees.
Growing startup approaching its first tax filing
A startup that has been operating for its first full financial year faces its first ECI and tax return obligations, often without knowing exactly what is required. Duellix walks the founding team through both filings, handles the computation, and files on their behalf. Because the accounts have been maintained on Xero throughout the year, there is no scramble to reconstruct records before the deadline.
Corporate tax services: common questions
What is the difference between ECI filing and the annual tax return?
The ECI filing is an estimate of your company's chargeable income, submitted to IRAS within three months of your financial year end. The annual tax return (Form C or Form C-S) is the full filing, due by 30 November for the preceding year of assessment. Both are required, and Duellix handles both as part of the same engagement.
Do I need to have Duellix do my bookkeeping to use the tax filing service?
The corporate tax service is designed to work as part of a broader accounting and compliance engagement that includes bookkeeping and financial statements. Because the tax computation draws directly from your accounts, having the same team manage both is what eliminates the reconciliation gap between your books and your IRAS filing.
Who actually handles my tax filing?
A named account manager is assigned to your engagement and handles your tax filing with the context they have built up through your bookkeeping. You are not passed between staff or re-explaining your business each year. The same person who knows your accounts prepares and submits your return.
What happens if IRAS sends a query after filing?
Your account manager handles IRAS correspondence as part of the engagement. With a same-day response time, queries are picked up and addressed promptly rather than sitting in a queue. You do not need to manage the IRAS relationship directly.