Financial Year End in Singapore: How to Choose Your FYE and Change It Later

Singapore lets your company choose any date as its financial year end (FYE). You set it on Bizfile at incorporation, and it drives a private company's deadlines: Estimated Chargeable Income within 3 months, AGM within 6 months, annual return within 7 months and Form C-S by 30 November of the next year. Pick a month-end that suits your business and keeps the first year at or just under 12 months.

This guide is for founders about to incorporate and directors thinking of moving an existing year end. The date decides how much of your start-up tax exemption you use, how many sets of accounts you prepare early on, and whether your deadlines pile up in November.

Amounts are in Singapore dollars (SGD), and the rules are as at November 2026.

Key takeaways

• Any date works. ACRA accepts any FYE, with 12-month or 52-week periods, and IRAS does not set it for you.
• Deadlines run from the FYE: ECI 3 months, AGM 6 months, annual return 7 months. Form C-S is due 30 November of the following year, between 11 and 22 months after a month-end FYE.
• A first period over 12 months is split into two Years of Assessment, and the short stub uses up one of your three start-up exemption years, even with no income.
• Keep the first year at or just under 12 months by ending it on the last day of the month before your incorporation month, a year later (incorporated 15 November 2026: 31 October 2027). Getting this wrong can cost up to $3,825 of tax in the year that drops out of the exemption.
• Changing your FYE is free on Bizfile. IRAS picks it up from ACRA, but GST periods do not change automatically.

Table of Contents

1. The Rules for Choosing a Financial Year End
2. How Does Your Financial Year End Affect Your Filing Deadlines?
3. Does Your Financial Year End Affect the Start-Up Tax Exemption?
4. Practical Factors to Weigh When You Choose a Financial Year End
5. What Is the Best Financial Year End for a New Company in Singapore?
6. How Do I Change My Financial Year End with ACRA?
7. Common Mistakes to Avoid
8. When to Get Professional Help
9. Frequently Asked Questions
10. Official Sources

The Rules for Choosing a Financial Year End

IRAS's basic guide says your company decides its financial year end based on what suits its business; IRAS does not set it. ACRA's rules are few.

• State it at incorporation. This has been a legal requirement since 31 August 2018, and the Bizfile incorporation form asks for the FYE and the financial year period.
• Any date is allowed. ACRA lists 31 March, 30 June, 30 September and 31 December as common choices.
• Later years run 12 months or 52 weeks. Flag a 52-week year when you incorporate or file a change, so you do not have to change your year end every year.
• The first period can be shorter or longer than 12 months. IRAS's own examples include first periods of 6 and 18 months.

Is There an 18-Month Limit on the First Financial Year?

Yes. Section 198(2) of the Companies Act 1967 says a company's first financial year must not be longer than 18 months unless the Registrar approves a longer one on the company's application. ACRA's FYE page mentions the 18-month figure only for changes of year end, but the Act applies it to the first year as well.

Treat 18 months as an outer limit, not a target. A long first period delays your first accounts and, as the start-up exemption section shows, gives you no extra tax exemption.

How Does Your Financial Year End Affect Your Filing Deadlines?

Four deadlines count from the FYE itself. The tax return follows the Year of Assessment.

Financial Year End and Year of Assessment

Companies are taxed on a preceding-year basis: the basis period for a Year of Assessment (YA) is the financial year ending in the year before it. In IRAS's example, a 31 March year end gives YA 2026 a basis period of 1 April 2024 to 31 March 2025. So any financial year ending in 2026 falls into YA 2027, and its Form C-S, C-S (Lite) or C is due by 30 November 2027. Our corporate tax filing guide explains which form applies.

Here is what each month-end means for a private company whose financial year ends in 2026.

ACRA counts to the same date: its examples give a 30 June year end an AGM date of 30 December and an annual return date of 30 January. IRAS counts to the month end: its example gives a 30 September year end an ECI date of 31 December. Where a date does not exist, the month's last day applies (29 February in a leap year). A company with a branch register outside Singapore has 8 months for its annual return. No ECI is needed if revenue is $5 million or less and the ECI is nil.

What the table tells you:

• Filing time is not payment time. A January year end gives 22 months to file Form C-S, December only 11. But a company with chargeable income files ECI within 3 months, and the tax on IRAS's assessment of it is due within 1 month, or in up to 10 GIRO instalments if you e-file the ECI by the 26th of the month after your year end. Whichever month you pick, the cash starts leaving at about the same point after your year end.
• Some year ends put a second deadline on 30 November, every company's Form C-S date: April (annual return), May (AGM), June (financial statements to members) and August (ECI).
• The 5-month date is your real accounts deadline if you skip the AGM by sending financial statements to members instead.

Get the dates for your own company from our company filing deadline calculator, and see the ECI filing guide for the waiver and instalments.

Does Your Financial Year End Affect the Start-Up Tax Exemption?

Yes, through your first year. The start-up tax exemption (SUTE, under section 43 of the Income Tax Act 1947) exempts 75% of the first $100,000 and 50% of the next $100,000 of normal chargeable income, up to $125,000 a YA, for a qualifying company's first 3 consecutive YAs. Three IRAS rules decide how much of it you use:

1. The first YA is the one whose basis period includes your incorporation date.
2. The basis period for each YA should not exceed 12 months, so first accounts longer than that are split across two YAs, by time apportionment where income and expenses cannot be matched to each period.
3. A YA with a loss or no income still counts as one of the three.

So any short stretch before your FYE date first comes round becomes exemption year one, whether you close accounts on that date or roll the stretch into a longer first period.

Worked Example with Three First-Year Options

Company A is incorporated on 1 November 2026.

The long first year buys nothing for tax: IRAS carves November and December 2026 back out as YA 2027, as if the accounts had closed on 31 December 2026. It only saves a set of accounts: IRAS's Form C-S notes have the company split its adjusted profit or loss between the two YAs in its first return, and apply the $5 million revenue test to the 12 months ending on its FYE.

The December options spend a whole exemption year on two months of trading. With 31 October, three full trading years sit inside the exemption. With either December option, the exemption ends with calendar 2028, so profit from 2029 (YA 2030) gets only the partial tax exemption: 75% of the first $10,000 and 50% of the next $190,000. On $100,000 of chargeable income in a YA, the partial exemption leaves $8,075 of tax against $4,250 under the start-up exemption: $3,825 more before any rebate, and the largest gap possible in a single YA.

The 12-Months-and-a-Few-Days Trap

The split applies even when the first period overruns by days. If Company B, incorporated on 15 November 2026, picks 30 November 2027, its first accounts run 12 months and 16 days, and YA 2027 covers just 15 to 30 November 2026, using up a whole exemption year. With 31 October 2027 (about 11.5 months), everything sits in YA 2028. The safe rule is to end the first year on the last day of the month before your incorporation month, one year on.

Short First Years Trigger Filings Without a Reminder

IRAS sends its first ECI notice in the year after the year of incorporation, and its first Form C-S notice by May of the second year after it (May 2028 for a company formed in 2026). If your first accounts close in the year of incorporation, no reminder comes. File ECI within 3 months of that FYE unless the waiver applies, and if the company started business or received income, request a return with IRAS's "Request for Income Tax Return for Newly Incorporated Companies" form. For Company A's 31 December 2026 option, that means a YA 2027 ECI by 31 March 2027 (unless waived) and a YA 2027 return by 30 November 2027.

See our start-up tax exemption guide for who qualifies, and the new company compliance checklist for other first-year filings.

Practical Factors to Weigh When You Choose a Financial Year End

Over the life of the company, these usually matter more than tax timing.

• Business cycle. End the year after your busiest season, so the accounts show a full cycle and you close the books in a quiet month. A business that peaks over the festive season might prefer 31 January or 28 February to 31 December.
• Stock counts. If you hold inventory, pick a month when stock is low and staff are free, not the week of a big sale or a holiday shutdown.
• Group alignment. Give a parent and its subsidiaries one year end. Consolidation is far simpler when every company closes on the same date.
• GST quarters. If you register for GST, IRAS's standard quarters end in your year-end month and every third month after it, so a March, June, September or December year end gives calendar quarters. Changing the year end later does not move them: you must ask IRAS, and any new periods must still align with your financial year.
• Calendar-year simplicity. 31 December matches the calendar year behind IR8A reporting (due 1 March), the CPF Additional Wage ceiling, the retrospective GST registration test and your own personal income tax.
• Your accountant's calendar. ACRA lists 31 December among the common year ends, so many companies' accounts fall due in May and June, and every company's tax return is due on 30 November. A different year end can make it easier to book time with your accountant or auditor.
• Not rebates. Corporate income tax rebates are set Budget by Budget for particular YAs: 50% for YA 2026, and as at November 2026 IRAS lists none for later YAs. Choosing a year end to land in a rebate year is guesswork.

What Is the Best Financial Year End for a New Company in Singapore?

There is no single best date. Work through these questions in order:

1. Must you match a parent or group? Use its year end.
2. Is the business seasonal or stock-heavy? Use the month-end after your peak, when stock is lowest.
3. Do you want calendar-year simplicity? Use 31 December, ideally if you incorporate early in the year.
4. Is your first period far from 12 months? Compare your preferred date with the last day of the month before your incorporation month, a year on. Weigh up to $3,825 of tax in the year that drops out of the exemption (if you expect chargeable income of $100,000 or more by then) against convenience.

This does not lock you in: once the three exemption years are used, you can move to 31 December using the steps below.

How Do I Change My Financial Year End with ACRA?

ACRA lets you move an existing year end, with conditions:

• You can only change the current or the immediately previous financial year, and not once the deadline to hold the AGM, file the annual return or send the financial statements has passed.
• The Registrar must approve, with a written reason, a change that creates a financial year longer than 18 months, or one that falls within 5 years of the end of a year last changed on or after 31 August 2018. Otherwise the change takes effect immediately.
• Filing is free. Where approval is needed, ACRA says it takes up to 14 working days.

Steps to Change Your Financial Year End

1. Map the transition. List each period the change creates, its YA, and the ECI and tax computation it needs. If the change leaves two year ends in one calendar year, or none in a year, agree the basis periods with your accountant first.
2. Record the decision in a directors' resolution and keep it with the company's records.
3. File on Bizfile. Log in as a Business User through Corppass, then choose Manage, Local company and "Update change of financial year end date". Enter your UEN, the revised FYE and the financial year period. A position holder such as a director can file, or a corporate service provider can file for you.
4. Attach a reason if approval is needed. Where the 18-month or 5-year rule applies, upload a PDF explaining why. ACRA confirms the outcome in your Bizfile inbox.
5. Plan your ECIs. IRAS updates its records from your ACRA filing, so there is no separate tax form. File each ECI on time, even if myTax Portal still shows the old year end.
6. Change your GST periods. They do not change automatically. Write in through myTax Mail (category "GST (Filing and Applications)", subject "Notify Business Changes") at least 30 days before the first period you want changed. IRAS must approve the request.

IRAS's own example. A company that moves its year end from 31 December 2024 to 31 March 2025 prepares two tax computations and files two ECIs: YA 2025 (1 January to 31 December 2024, ECI due 31 March 2025) and YA 2026 (1 January to 31 March 2025, ECI due 30 June 2025). YA 2027 then covers 1 April 2025 to 31 March 2026. The first ECI falls due on the day the 15-month financial year closes, so expect to estimate before your accounts are final.

Common Mistakes to Avoid

1. Overrunning 12 months in the first year by days or weeks, which turns the stub into exemption year one.
2. Waiting for IRAS notices after closing your first year in the incorporation year. ECI, and possibly a Form C-S, are due anyway.
3. Using an FYE change to fix a missed deadline. ACRA will not allow it; apply for an extension of time before the deadline instead.
4. Forgetting the GST periods after you change your year end.
5. Changing again within 5 years without allowing for the Registrar's approval.

When to Get Professional Help

You may not need help at all. If your company is a straightforward service business incorporated early in the year, 31 December is a sensible choice you can make yourself on the incorporation form.

Advice is worth paying for when you are incorporating mid-year and expect a profit within three years, when the business is seasonal, holds stock or belongs to a group, when you plan to change an existing year end, or when you have already closed a short first year and are unsure what IRAS expects.

Tax Filing SG is run by ex-Big 4 Singapore Chartered Accountants (ISCA members) who work with Singapore SMEs. We can map your deadlines, prepare transition-year accounts through our accounting services and handle the tax computations and returns through our corporate tax filing service.

Frequently Asked Questions

Can my first financial year be longer than 12 months?

Yes. In one of IRAS's own examples, a company incorporated on 1 July 2023 closed its first accounts 18 months later, on 31 December 2024. IRAS splits any first period longer than 12 months into two Years of Assessment, because the basis period for each YA should not exceed 12 months. Keep a first year within 18 months: the Companies Act requires ACRA's approval for anything longer, and a longer first year would only delay your first accounts and add no start-up exemption.

Is 31 December the best financial year end for a small company?

It is a sound default for a non-seasonal service company, because it matches the calendar year used for IR8A reporting, the CPF Additional Wage ceiling and the retrospective GST registration test. It is a weaker choice if you incorporate late in the year, because the short stub uses up a start-up exemption year, or if December is your peak trading or stock month.

Does a later financial year end give me more time to pay tax?

Not much. Form C-S is due on 30 November of the year after your year end, so a January year end gives 22 months to file against 11 for December. But a company with chargeable income must file ECI within 3 months of its year end, and tax on IRAS's assessment of that estimate is due within 1 month or by GIRO instalments, whichever month you choose.

Do I need to tell IRAS when I change my financial year end?

Not for income tax. You file the change with ACRA on Bizfile and IRAS updates its records from that filing; if myTax Portal still shows the old year end, file your ECI on time anyway. GST is separate: your GST periods do not change automatically, so a GST-registered company that wants new periods must write to IRAS through myTax Mail at least 30 days before the first one starts.

Can I change my financial year end after missing my AGM or annual return deadline?

No. ACRA does not allow a change of year end once the deadline to hold the AGM, file the annual return or send the financial statements has passed, so a new year end cannot cure a late filing. If you only need more time, apply on Bizfile for a 60-day extension of time before the deadline. Each application costs $200, and ACRA advises applying at least 14 working days ahead.

Can my company use a 52-week financial year?

Yes. ACRA accepts accounting periods of 12 months or 52 weeks, which suits businesses such as retailers that close on the same weekday each year. Flag the 52-week option when you incorporate or file a change of year end, so you do not have to change the year end every year. If you are GST-registered, ask IRAS for special accounting periods to match.

Official Sources

• ACRA: Choosing a company's financial year end
• ACRA: Updating changes to your financial year end
• ACRA: Holding annual general meetings, due dates and requirements
• IRAS: Basic guide to corporate income tax for companies
• IRAS: Estimated Chargeable Income (ECI) filing
• IRAS: Corporate income tax rate, rebates and tax exemption schemes
• IRAS: Explanatory notes to Form C-S for YA 2026 (PDF)
• IRAS: Changing GST accounting periods

About Tax Filing SG — We are a Singapore accounting practice run by ex-Big 4 Singapore Chartered Accountants (ISCA). We handle accounting, corporate tax, GST and company secretarial work for Singapore SMEs, including overdue and late filings.

Last updated: 9 November 2026. This article is general information based on IRAS and ACRA guidance as at November 2026, not advice for your specific situation. Rules, rates and deadlines change, so check the official sources above or speak to us before acting.