UAE corporate tax registration deadlines

When UAE corporate tax registration is due

UAE corporate tax registration is the process of applying to the Federal Tax Authority for a Tax Registration Number before the deadline that applies to your business, and it is mandatory for every UAE resident juridical person regardless of whether the business makes a profit. It matters because missing the deadline triggers a fixed AED 10,000 penalty even when no tax is actually owed for the period.

Corporate Tax applies to financial years starting on or after 1 June 2023, under Federal Decree-Law No. 47 of 2022, at a headline rate of 9% on taxable income above AED 375,000 and 0% on taxable income up to that amount. Registration is a separate step from paying tax: a business registers, and files a return, whether or not it ends up owing anything.

The deadline for businesses that existed before March 2024

For resident juridical persons incorporated before 1 March 2024, the Federal Tax Authority tied the registration deadline to the month a business's trade licence was issued, not to the date it started trading. Licences issued in January or February were due to register by 31 May 2024, and licences issued in December were due by 31 December 2024, with the months in between falling progressively across that timetable.

Where a business holds more than one trade licence, the earliest issuance month sets the deadline for the whole legal person, not for each licence separately. A business in this group that has not yet registered is now overdue and should register without further delay, since the fixed penalty and any accrued exposure only grow the longer registration is left outstanding.

The deadline for businesses formed since March 2024

For any resident juridical person incorporated, established or otherwise recognised on or after 1 March 2024, the rule is simpler and is the one that matters for a new UAE business registering today: apply for corporate tax registration within 3 months of the date of incorporation, establishment or recognition.

This 3-month clock starts from the incorporation date on the trade licence, not from the date the business opens its doors or issues its first invoice. A company that incorporates in one month and only begins trading several months later still has to register within 3 months of incorporation, well before its first sale.

• Trigger date: date of incorporation, establishment or recognition on the licence
• Deadline: 3 months from that trigger date
• Applies to: every resident juridical person formed on or after 1 March 2024
• Separate step: registration is required even if the business expects to owe no tax

The AED 10,000 late-registration penalty, and the waiver window

Missing the applicable registration deadline carries a fixed administrative penalty of AED 10,000 under Cabinet Decision No. 10 of 2024, and the fine applies regardless of whether the business actually has any tax liability for the period. There is no reduced or proportional version of the fine for a short delay.

A temporary waiver of the late-registration penalty was made available where a business's first corporate tax return, or its first annual declaration, was filed within 7 months of the end of its first tax period. This route does not remove the registration deadline itself; it addresses the penalty for a business that registered late but still filed its first return promptly, so it is worth checking with a tax adviser whether a specific case still qualifies before assuming the fine stands.

When your first corporate tax return is due

The first, and every subsequent, corporate tax return, together with any payment due, must be filed within 9 months from the end of the relevant tax period, under Article 53 of Federal Decree-Law No. 47 of 2022. For a business whose tax period follows the calendar year and ended 31 December 2025, the return and payment are due by 30 September 2026.

The Federal Tax Authority has publicly urged businesses to file and settle within that 9-month window rather than waiting until the deadline, since a return that surfaces a problem, such as a missing supporting schedule or an unresolved Small Business Relief election, is far easier to fix with weeks in hand than with days. The 9-month clock runs from the tax period end date, not from the registration date, so a business that registered late in its first year does not gain extra time to file: the return deadline is fixed to the period, while the registration deadline is fixed to the incorporation date, and the two run independently of each other.

Registering does not depend on Small Business Relief

A business whose revenue is low enough to qualify for Small Business Relief still has to register for corporate tax by its normal deadline; the relief changes what is owed, not whether registration is required. Electing Small Business Relief happens after registration, when the return is prepared, so a business should not delay registering on the assumption that a low-revenue election will make the step unnecessary.

Our guide on UAE Small Business Relief covers the AED 3,000,000 revenue test, the election itself and when it is worth taking in full; this article only covers the registration step that comes before it.

Free zone businesses register the same way

A free zone company, including one that plans to elect Qualifying Free Zone Person treatment for a 0% rate on qualifying income, is still a resident juridical person under Federal Decree-Law No. 47 of 2022, and it follows the same registration deadlines as a mainland company: 3 months from incorporation for a business formed on or after 1 March 2024, or the licence-month schedule for one formed earlier. The 0% rate on qualifying income is a feature of how the return is calculated, not an exemption from the registration step.

A group that operates through several entities, a mainland company and one or more free zone companies, has to track a separate registration deadline for each legal person, since each incorporation date starts its own 3-month clock. Our guide on UAE free zone versus mainland corporate tax works through how the qualifying and non-qualifying income split actually works once a free zone business has registered.

Records the Federal Tax Authority expects you to keep

Once registered, a business receives a Tax Registration Number, a 15-digit number in which the first 3 digits identify the Federal Tax Authority, the middle 9 identify the business, and the final 3 are check digits. Corporate Tax records and documents must be retained for at least 7 years following the end of the relevant tax period.

Taxable income itself must be determined from duly prepared, unconsolidated financial statements that meet IFRS or the IFRS for SMEs Accounting Standard, per Ministerial Decision No. 114 of 2023; those are the only two accounting bases the Federal Tax Authority accepts for this purpose. A business that cannot produce a clean trial balance, chart of accounts and set of financial statements on request has a registration and record-keeping problem well before it has a tax problem.

A worked registration timeline

Take a trading company incorporated on 15 April 2025, after the 1 March 2024 cutoff, with a tax period that follows the calendar year. Its registration deadline is 3 months from incorporation, so it must register by 15 July 2025. Suppose it misses that date and only registers on 20 August 2025, 36 days late.

Because it registered late, the AED 10,000 penalty applies in principle. Its first tax period runs to 31 December 2025, so the 7-month waiver window for that penalty runs to 31 July 2026; if the business files its first corporate tax return by that date, the late-registration penalty may be waived even though registration itself was late. Separately, its first corporate tax return and any payment are due by 30 September 2026, 9 months after the 31 December 2025 period end, whether or not the waiver applies.

• Incorporation date: 15 April 2025
• Registration deadline: 15 July 2025 (3 months later)
• Actual registration: 20 August 2025 (late, AED 10,000 penalty exposure)
• Penalty-waiver deadline: 31 July 2026 (7 months after the 31 December 2025 period end)
• First return and payment due: 30 September 2026 (9 months after the period end)

Common registration mistakes

Most registration problems are timing problems rather than genuine disputes about liability, so treating the deadlines as fixed dates on a calendar, not as flexible targets, avoids nearly all of them. A finance team that diaries the incorporation date, the 3-month registration deadline and the 9-month return deadline the day a business is formed rarely needs to think about corporate tax registration again until the return itself is due.

• Counting the 3-month period from the trading start date instead of the incorporation date on the licence
• Assuming a business that expects to owe no tax, or that qualifies for Small Business Relief, does not need to register at all
• Registering only the licence with the earliest issuance month and overlooking that it sets the deadline for every other licence the same legal person holds
• Treating the 9-month return deadline and the 3-month registration deadline as the same date
• Waiting for a reminder from the Federal Tax Authority rather than tracking the deadline from the incorporation date

Keeping the records behind UAE corporate tax registration in Skyline Nexus ERP

Corporate tax registration is a filing step, but what it depends on is clean, ongoing records: a chart of accounts, journal entries and financial statements that foot correctly on the day a registration or a return is due. Skyline Nexus ERP's Fiscal Authority module keeps the chart of accounts, trial balance, profit and loss, balance sheet and general ledger in one place, in both English and Arabic account names, so a business is not assembling its first set of financial statements the week its registration deadline falls due.

Its Audit Pack export produces a single workbook for a chosen year, with a sheet for the chart of accounts, trial balance, balance sheet, profit and loss, journal entries and lines, general ledger, sales, purchases and more, which is the kind of pack an adviser preparing a corporate tax registration or a first return typically asks for. Filing the registration and the return itself, along with other UAE corporate-tax-specific connectors, is being rolled out market by market: tell us your country and we will confirm your go-live date.