For most UAE businesses with a financial year that ended on 31 December 2025, one date now dominates the calendar: 30 September 2026. That is the deadline to both file the Corporate Tax return and pay any tax due for that year. It is not two separate dates and it is not filing now, paying later. Miss either half and administrative penalties follow. With roughly a month to go, this is the checklist to work through so the deadline is a formality rather than a scramble.
One date, two obligations
The single most important thing to understand is that the deadline covers filing and payment together. The Corporate Tax return is due within nine months of the end of the tax period, and for a year ending 31 December 2025 that lands on 30 September 2026. The payment of any tax owed is due by the same date. A business that files a perfect return on time but leaves the payment until later has still missed the deadline in a way that is penalised.
| Obligation | Due | If missed |
|---|---|---|
| File the return | 30 September 2026 | Late-filing penalty |
| Pay the tax due | 30 September 2026 | Late-payment penalty that grows over time |
The four-week checklist
The work divides cleanly into the pieces you can prepare now and the submission itself. Do the preparation first, because it is where the time goes.
| Step | What to do |
|---|---|
| 1. Confirm registration | Have your Corporate Tax registration number ready; you cannot file without it |
| 2. Finalise the accounts | Prepare financial statements for the period you can stand behind |
| 3. Make the tax adjustments | Add back non-deductible items and apply any reliefs to reach taxable income |
| 4. Confirm reliefs and elections | Small Business Relief, free zone treatment, or other positions, with support |
| 5. Calculate the tax | Apply the rate to taxable income above the threshold |
| 6. File on EmaraTax | Complete and submit the return |
| 7. Pay by the deadline | Settle the balance so it clears by 30 September |
Filing at a loss, or below the threshold, still counts
A common and costly misunderstanding is that a business with no tax to pay has nothing to do. That is wrong. A registered taxable person must file a return even if it made a loss or its taxable income sits below the threshold and no tax is due. The obligation is to file, not merely to pay, and the late-filing penalty applies regardless of whether any tax was owed. Do not let a nil or loss position lull you into missing the deadline.
Filing and payment share one date, and filing is required even when no tax is due. The two most expensive assumptions this month are "I will pay later" and "I made a loss, so there is nothing to file."
Leave room for the payment to clear
Payment is where time-pressure bites hardest. Settling the balance is not instant: a bank transfer needs to be initiated early enough to actually reach the Authority and be allocated by the deadline, not merely started on the day. Treat the payment as something to complete a few days ahead, with the reference correct, rather than a last-hour click. A payment that leaves your account on 30 September but arrives after it can still be treated as late.
What to do about it
Work backwards from 30 September. Confirm your registration number and finalise the accounts first, then the adjustments and any reliefs, so the return itself is quick to complete. File on EmaraTax with time to spare, and initiate the payment early enough to clear by the date. If you are in a loss or below-threshold position, file anyway. And if the numbers or the reliefs are not straightforward, get help now rather than in the final week, when everyone else is doing the same. The deadline rewards businesses that started the checklist a month out.
This article is general information and is not tax advice. Deadlines, penalties, and reliefs are set by the Federal Tax Authority and depend on your circumstances. We would be glad to help you prepare and file before 30 September.