UAE Corporate Tax Filing: What to Do Before September 30, 2026
If your financial year ended on December 31, 2025, your first stop this month is a date, not a document: September 30, 2026. That is the day your UAE corporate tax return is due, and the day any tax you owe has to be paid.
The rule behind the date is simple. The Federal Tax Authority requires a taxable person to submit a tax return and pay any corporate tax due within nine months of the end of the tax period, filed online through EmaraTax, on a self-assessment basis. That is set out in the FTA's Corporate Tax Returns Guide (CTGTXR1). Nine months after December 31, 2025 is September 30, 2026. A June 30 year end means March 31 of the following year. There is no extension request in the system, so the calendar does the deciding.
Filing and paying are one deadline, not two
This is the part that catches finance teams out. The return and the payment share the same due date. Filing on time while paying late still triggers a penalty, and the two penalties are structured differently.
Under Cabinet Decision No. 75 of 2023 and its amendments:
- Failing to submit a tax return on time costs AED 500 for each month, or part of a month, for the first twelve months, then AED 1,000 per month from the thirteenth month onward. It starts the day after the deadline.
- Failing to settle the payable tax carries a monthly penalty of 14 percent per annum on the unsettled amount, for each month or part of a month.
- Submitting an incorrect return is AED 500, unless you correct it before the filing deadline expires.
The filing penalty is a fixed irritation. The payment penalty scales with the size of the bill, which is why a cash shortfall in September is more expensive than a paperwork delay.
What the return actually asks for
Most of the return is populated from your own books, so the work is in the preparation rather than the portal. Before you open EmaraTax, have these ready:
- Financial statements. The FTA guide makes these a mandatory attachment for all taxable persons, with one exception: businesses that elect Small Business Relief.
- Your revenue figure for the tax period, because it decides which elections and schedules appear.
- Adjustments, including exempt income, non-deductible expenditure, interest limitations, and any transitional rules that apply to your first tax period.
- Related party and connected person disclosures, if you have transactions with either.
- An authorized signatory whose details on the portal are current.
Small Business Relief is an election, not an exemption
If your revenue does not exceed AED 3 million in the current tax period and in every previous one, you may be able to elect Small Business Relief, which treats you as deriving no taxable income for that period. The relief comes from Ministerial Decision No. 73 of 2023 and applies to resident persons, excluding qualifying free zone persons and members of multinational groups.
The word that matters is elect. You still register, you still file a return, and you still make the election inside that return. Doing nothing does not get you the relief. The FTA's returns guide walks through where the election sits in the form.
Free zone companies file too
A qualifying free zone person can benefit from a 0 percent rate on qualifying income, but that is a rate, not a filing waiver. Registration and an annual return are still required, and the qualifying status depends on meeting substance and qualifying activity conditions each year. The Ministry of Finance keeps the current framework and legislation on its corporate tax page.
The cash flow problem hiding behind the date
Corporate tax is due in cash, on a fixed day, calculated on profits you booked up to nine months earlier. For a B2B supplier that sells on credit terms, a good chunk of those profits is still sitting in unpaid invoices.
That gap is normal in this market, not a sign of a badly run business. Atradius, in its Payment Practices Barometer research for the UAE, reports that around half of B2B sales are transacted on credit terms and that roughly two in five invoices are settled late. The World Bank makes the same point globally: access to short-term finance is a leading constraint on small and medium enterprises.
So the September squeeze is predictable. You owe 9 percent on taxable income above AED 375,000, your customers owe you on 60 day terms, and the two dates do not line up.
Four things to do before September 30
- Fix the number now. Close the accounts, compute the liability, and know the figure in the first half of September rather than the last week. Our UAE corporate tax calculator gives you a quick estimate to work from.
- Check the portal details before the queue. Signatory, trade license, and contact details need to be current. Confirming them takes minutes in early September and days at the end of it.
- Map the payment against your collections calendar. List which invoices are expected to land before the deadline, then assume the usual slippage rather than the promised date.
- Close the gap before it becomes a penalty. If collections land after the tax does, arrange the cash rather than paying 14 percent per annum on an unsettled balance.
Where Comfi fits
Comfi lets UAE B2B suppliers get paid on their invoices upfront while their buyers keep 30, 60, or 90 day terms. Instead of choosing between funding a tax payment and paying your own suppliers, you convert receivables you have already earned into cash, typically within hours of submission. It is a way to meet a fixed date with money that is genuinely yours.
Eligibility is straightforward: UAE-registered, B2B, at least six months of operating history, and monthly revenue of AED 300,000 or more. You can model the effect on your own numbers with the invoice discounting calculator, or read more on how corporate tax affects SME cash flow.
The short version
A December year end means September 30, 2026. File and pay on the same day. Attach financial statements unless you elect Small Business Relief. Free zone status does not remove the filing duty. And treat the cash side as a planning problem in early September, not a surprise in the final week.
If the tax bill is due before your customers pay you, get started with Comfi and turn outstanding invoices into working cash.
