Reference

The UAE Tax Calendar

Reference·Updated 27 July 2026

Most UAE tax penalties are not penalties for wrong answers. They are penalties for late ones. The regime runs on a small number of clocks, each starting from a different event, and businesses that lose track of which clock is theirs pay for the confusion in fixed and percentage penalties. Here is every deadline that matters, in one place. Dates reflect the rules as at July 2026; specific cases should always be confirmed against your own registration and the FTA’s current decisions.

Corporate Tax

Obligation	Deadline
Return and payment	Nine months after the end of the tax period. December year end files by 30 September following; March year end by 31 December; June year end by 31 March.
Registration: new companies	Within the FTA’s prescribed window from incorporation, generally three months for newly formed entities. Register on formation, not on first profit.
Registration: natural persons	Required once licensed business revenue exceeds AED 1 million in a calendar year, with registration due by the FTA’s prescribed date following that year. The tax period is always the calendar year.
Elections inside the return	Small Business Relief, transitional relief for pre-regime assets, realisation basis, and tax grouping all have their own windows, mostly anchored to the first relevant return. Missed election windows generally do not reopen.
Transfer Pricing disclosure	Filed with the Corporate Tax return where thresholds are met; Master File and Local File must exist and be producible on FTA request within the prescribed period.
Audited financial statements	Required above AED 50 million revenue and for every Qualifying Free Zone Person, and must exist to support the return by the filing date.

The nine-month runway looks generous and behaves otherwise: the audit has to finish first, positions have to be decided before they can be filed, and elections die quietly inside it. Our working rule for clients: the tax file should be substantively closed within six months of year end, leaving the last quarter for review rather than discovery. Small Business Relief was extended to eligible periods ending on or before 31 December 2029; review the annual election as covered in our relief guide.

VAT

Obligation	Deadline
Return and payment	Within 28 days of the end of each tax period, monthly or quarterly as the FTA assigns. When the deadline lands on a weekend or holiday, it rolls to the next business day.
Registration	Within 30 days of becoming liable: taxable supplies and imports exceeding AED 375,000 over the previous 12 months, or expected to within the next 30 days.
Deregistration	Within 20 business days of ceasing to be eligible: applying late is itself penalised.
Voluntary disclosure	For errors understating tax by more than AED 10,000, within 20 business days of discovering the error. Discovery starts the clock, not convenience. See our disclosure guide.

E-invoicing

Obligation	Deadline
Voluntary and pilot phase	Open since 1 July 2026 to any business choosing to adopt early, without penalty exposure.
Appoint an Accredited Service Provider: revenue AED 50 million or more	30 October 2026, extended from the original 31 July 2026.
Go live: revenue AED 50 million or more	1 January 2027. This date did not move when the appointment deadline was extended.
Appoint a provider: revenue below AED 50 million, and government entities	31 March 2027.
Go live: revenue below AED 50 million	1 July 2027.
Go live: government entities	1 October 2027.
System failure notification	Within the prescribed notification window once live: late notification carries a daily penalty.

These are the only deadlines on this page that cannot be met by working faster at the end, because the obligation is operational rather than a filing. Master data cleanup and tax determination review have longer lead times than the contracting step, so the appointment deadline is not the date to start. Our e-invoicing guide sets out the full framework, and our e-invoicing service describes the sequence we run.

Excise

Obligation	Deadline
Return and payment	Monthly, by the 15th day of the following month.
Registration	Before conducting any activity involving excise goods: there is no threshold and no grace supply.

The clocks people forget

Beyond the routine cycle, four deadlines surface only when something happens, which is exactly when they get missed. An FTA audit notice starts response windows measured in days for information requests. An assessment starts the strict escalation clock: reconsideration, then the Tax Disputes Resolution Committee, then the courts, each stage with its own short window, as our audit defence page sets out. A change of legal form or the death of a sole establishment’s owner triggers deregistration and fresh registration duties on the FTA’s timelines, not the family’s. And a foreign partnership’s tax transparency survives only as long as its annual declaration keeps being filed, a clock with no reminder attached, as covered in our family wealth commentary.

Build the calendar once

Every business needs this reduced to its own dates: its year end, its VAT stagger, its election windows, its declaration cycle. That is a one-page document we produce in every engagement, and then track, because a deadline calendar nobody watches is decoration. If your current advisor has never shown you yours, that is worth asking about. Ours comes standard with the Corporate Tax and VAT practices.

Sources & currency

The positions on this page were last reviewed against published legislation and official guidance on 27 July 2026.

UAE tax law changes, and guidance is amended between reviews. This page is general information, not advice on your own position, and the official sources above prevail over anything stated here. Check the current position before acting, or ask us.

Which of your clocks is already running?

We map every deadline your structure carries, on one page, with the elections that expire this year flagged in copper.

Begin the Conversation →