UAE Corporate Tax Filing Deadlines 2026

Missing a UAE Corporate Tax filing deadline is one of the most avoidable, and most expensive, mistakes a UAE business can make. The Federal Tax Authority (FTA) imposes administrative penalties for late filing, late payment and inaccurate returns, and unlike many other compliance regimes, the UAE CT calendar offers no automatic extensions. This guide explains how the deadline is calculated, what the most common deadlines look like by financial year, and what happens if you miss them.

The 9-month rule

Article 53 of the Corporate Tax Law is unambiguous: the Tax Return and any tax payable must be filed and paid within 9 months of the end of the relevant tax period. There is no concept of an automatic extension, and the deadline is the same whether you are a profitable mainland LLC or a freelancer electing Small Business Relief.

"Within 9 months" means the deadline is the same calendar day, nine months later. For example, a financial year that ends on 31 December has a filing and payment deadline of 30 September the following year.

Common financial year-ends and their deadlines

Below are the deadlines for the most common UAE financial year-end dates. Free zone licences in the UAE often dictate non-calendar FY ends, so it's worth checking your trade licence and management accounts for the exact end date.

Where you file: EmaraTax

UAE CT returns are filed online through the EmaraTax portal at eservices.tax.gov.ae. You need to be registered for Corporate Tax (separate from VAT registration) and have a Tax Registration Number (TRN) before you can file. Registration itself has a deadline based on your trade licence issue date. Leaving registration until close to the filing deadline is a common cause of late penalties.

Penalties for late filing

Late submission of the Tax Return triggers a fixed administrative penalty published by Cabinet Decision No. 75 of 2023:

• AED 500 per month for the first 12 months of delay (or part-month);
• AED 1,000 per month from the 13th month onwards;
• Penalties accumulate independent of any tax owed. They apply even if your CT liability is AED 0 (for example because you elected SBR).

A two-year delay therefore costs at least AED 18,000 in late-filing penalties alone, before any payment penalties.

Penalties for late payment

Where the Tax Return shows tax payable and that tax is not settled by the deadline, monthly penalties apply on top of the late-filing penalty:

• 14% per annum on the unpaid tax, calculated monthly from the day after the due date until the tax is settled;
• A one-off 2% immediate penalty on the day the payment becomes overdue;
• A further 4% monthly penalty thereafter on the unpaid amount (uncapped, and compounds quickly).

Other deadline-related risks

Beyond the headline penalties, repeated non-compliance can trigger secondary consequences:

• Tax audits. Late filers are statistically more likely to be audited. An audit that uncovers under-declared tax attracts further penalties (up to 50% of the additional tax owed).
• Trade licence renewal complications. Some mainland and free zone authorities ask for evidence of FTA compliance at renewal time. Outstanding penalties can delay the renewal.
• Director / shareholder visibility. Repeated late-filing for entities you control can affect future tax registrations and good-standing certificates.

Practical tips

• Diarise the deadline twice. Calendar reminder at 6 months after FY end (start the return) and 8 months (final filing window).
• Keep books current. Reactive bookkeeping in month 8 leads to errors and missed elections. SBR and exempt income are easier to identify with year-round tidy records.
• Don't conflate VAT and CT. They have different registration thresholds, different portals (same EmaraTax login, different module), and different deadlines.
• Estimate your liability early. Use the free UAE Tax Calculator at month 6 or 7 to get a sense of what you'll owe. Surprise payment shocks cause most late payments.