When Is My Corporate Tax Return Due?

Filing deadline by financial year end

The final column is the date that matters if you registered late: Filing within 7 months of financial year end (by 31 July 2026 for a December 2025 year end) waives the AED 10,000 late-registration penalty It falls two months before the filing deadline in every case, which is why a business planning around the filing date alone will miss it.

The full position

The rule is simple and the practical difficulty is entirely in what has to happen before it.

Nine months sounds generous. For a business with clean monthly bookkeeping it is. For a business that closes its books once a year, it is the period in which a year of records has to be reconstructed, financial statements prepared, an audit completed where one is required, a computation built with each adjustment supported, and related party transactions identified and priced.

Which is why the businesses that file comfortably are not the ones that started early. They are the ones that were never behind. The deadline is a symptom of the bookkeeping rather than an event in its own right.

One further point: payment is due with the return, not afterwards. A business that prepares its return on the deadline is making a payment on the deadline, which for a first year of corporate tax is a cash flow event nobody has budgeted for.

A workable timetable, backwards from the deadline

For a December year end filing by 30 September 2026:

• Month 1 to 2: close the accounts. Reconciliations complete, cut-off tested, fixed asset register agreed
• Month 2 to 3: financial statements prepared, with related party transactions identified
• Month 3 to 4: audit, where the free zone or licence requires one. This deadline is frequently tighter than the tax one and drives everything
• Month 4 to 5: computation built, adjustments documented and referenced back to the ledger
• Month 6: review with the business, elections considered, return filed
• Remaining months: slack for questions, rather than the working period

That schedule files three months early. It is not gold-plating: it is what leaves room for the question that arises in month five, which on a compressed timetable becomes a filing risk rather than a query.

Where the free zone deadline overtakes the tax deadline

For most free zone companies, 30 September 2026 is not the binding constraint. The zone’s own requirement for audited financial statements usually falls well before it, several zones expect them within 90 days of the financial year end, and late submission affects licence renewal rather than merely attracting a penalty.

So a DMCC or similar free zone company working backwards from the tax deadline has already missed its real one. The correct approach is to confirm the zone’s current submission date, build the timetable from that, and treat the corporate tax return as the comfortable item that follows.

This is worth checking rather than assuming, because zone requirements change and they differ between zones. Confirm it in your zone’s portal rather than taking it from an article.

What happens if you file late

Late filing is assessed separately from late registration and separately again from late payment. They are independent, so being late on one does not absorb the others.

Where tax was payable and is also late, Cabinet Decision No. 129 of 2025 applies from 14 April 2026 at a flat 14% per annum on overdue tax on the overdue amount. That replaced the previous compounding model, so any exposure figure calculated on monthly compounding is overstated, a point worth raising if somebody has quoted you one.

There is also a reason to file on time that has nothing to do with penalties. In a loss-making year, filing preserves the loss for carry-forward against up to 75 per cent of taxable income in a later period, subject to continuity of ownership and business. An unfiled return in a loss year is a relief you may not be able to claim later, and that can be worth considerably more than the penalty.

What people get wrong

• Treating the deadline as the start date. Nine months is the working period, not the notice period.
• Forgetting the payment falls due with the return, which is a cash flow event in a first corporate tax year.
• Planning around 30 September 2026 when a free zone deadline is tighter and affects licence renewal.
• Missing the seven-month waiver date, which falls two months before the filing deadline.
• Not filing in a loss year, putting the carried-forward loss at risk.
• Assuming a nil return is optional. A return is mandatory for every registered taxable person, including those at 0%, those electing Small Business Relief, and free zone companies with QFZP status
• Working to a monthly-compounding penalty estimate, which is out of date since 14 April 2026.

What to do about it

1. Confirm your financial year end as registered, and check it matches what the accounts are prepared to.
2. Calculate both dates: the filing deadline and the seven-month waiver date.
3. Check your free zone or licensing deadline, which may be earlier and may govern.
4. Work backwards to establish when the accounts actually need to close.
5. Budget for the payment, which lands on the same day as the return.

Related questions

Frequently Asked Questions

Last reviewed 27 July 2026. Rates, thresholds and deadlines change, the e-invoicing provider deadline has already moved once. Confirm current requirements with the Federal Tax Authority before acting, or ask us to check your position.