UAE Corporate Tax Deadline 2026

Your UAE corporate tax deadline is nine months after the end of your financial year. For a business with a financial year ending 31 December 2025, the corporate tax return and payment are both due by 30 September 2026. Filing and payment are a single obligation, with no instalments and no routine extensions.

The nine-month rule

There is no single nationwide filing date. Your deadline is always nine months from the last day of your financial year, so it depends on the year end your business uses. Because most UAE businesses use the calendar year, 30 September 2026 is the date that applies to the majority, and for many it is their second corporate tax return.

Key deadlines that fall in 2026

If your year end is not listed, apply the same rule: count nine months forward from the last day of your financial year.

Filing and payment are one obligation

The Federal Tax Authority treats the return and the payment as a single deadline. You cannot file now and pay later, and there are no provisional or advance instalments. The payment must actually reach the FTA by the deadline, so allow time for bank transfers to clear. A last-minute payment that settles a day late is still a late payment.

Registration deadlines

Filing is separate from registration. Newly incorporated businesses must register within three months of incorporation. Missing the registration deadline triggers an AED 10,000 penalty, regardless of whether any tax is eventually due.

The late registration penalty waiver

The FTA is currently running a relief initiative on the AED 10,000 late registration penalty. If you file your first corporate tax return, or annual declaration, within seven months of the end of your first tax period, rather than the usual nine, the penalty is waived, and credited back if you have already paid it.

For a business whose first tax period ended on 31 December 2025, that means filing the first return by 31 July 2026. This applies to the first return only, so if it is relevant to you, acting early is essential.

Penalties for missing the deadline

The penalties apply automatically:

• Late registration: AED 10,000
• Late filing: AED 500 per month for the first twelve months, then AED 1,000 per month
• Late payment: 14% per annum on the unpaid tax, charged monthly until settled

Free zone and nil returns

Free zone companies must file, even a Qualifying Free Zone Person taxed at 0%. A business with no tax to pay, or a loss, still files a return by the same deadline. Filing is mandatory for every taxable person, whatever the result.

The practical takeaway for 2026 is simple: confirm your financial year end, count nine months, and treat that date as fixed. Closing your books early is the single best way to avoid a rushed first or second filing.