UAE Corporate Tax and E-Invoicing: The Deadlines to Plan For

The short answer: corporate tax is 9% on taxable income above AED 375,000, returns and payment are due nine months after your financial year ends (31 December 2025 year end → 30 September 2026), Small Business Relief for revenue up to AED 3 million now runs to 31 December 2029, and businesses over AED 50 million revenue must appoint an accredited e-invoicing service provider by 30 October 2026 ahead of go-live on 1 January 2027.

Corporate tax: the numbers that matter

Item	Position
Rate	0% on taxable income up to AED 375,000, 9% above it
Return and payment deadline	Nine months after the end of the tax period
31 December 2025 year end	File and pay by 30 September 2026
Small Business Relief	Revenue up to AED 3 million, extended to 31 December 2029
Record keeping	Seven years after the end of the tax period

Small Business Relief is not automatic silence: eligible businesses still register and still file, using a simplified return, within the normal deadline. Electing for the relief and then not filing is a common and expensive misunderstanding.

VAT has not changed, but the two get confused

VAT and corporate tax are separate regimes with separate registrations and deadlines. VAT is charged at 5%; registration is mandatory once taxable supplies and imports pass AED 375,000 over the previous twelve months, or when you expect to pass it in the next thirty days; and returns are due 28 days after the end of each tax period, usually quarterly. The identical AED 375,000 figure in both regimes is coincidence, and it trips up more finance teams than any other number in UAE tax.

E-invoicing: the deadline before the deadline

The UAE is moving to structured electronic invoicing exchanged through accredited service providers rather than PDFs sent by email. The mandate goes live on 1 January 2027, but the preparation step has its own date: businesses with annual revenue above AED 50 million must appoint an Accredited Service Provider by 30 October 2026, a deadline the Ministry of Finance extended from 31 July 2026.

Appointing a provider is the easy part. The work that takes months sits behind it:

• Master data. Customer and supplier records, tax registration numbers and item codes have to be complete and consistent — structured invoices fail on gaps that a PDF tolerated.
• Your billing system. Invoices must be produced in the required format with the mandated fields, which usually means an ERP or billing system change rather than a report tweak.
• Process. Credit notes, corrections and rejected invoices all need a defined path once exchange is machine-to-machine.

A sensible sequence for the next few months

1. Confirm your tax period and filing date — it follows your financial year, not the calendar year.
2. Check whether Small Business Relief applies on revenue, and diarise the simplified return anyway.
3. Close the books monthly, not annually. Nine months sounds generous until the audit trail has to be rebuilt from bank statements.
4. Run a data quality pass on customers, suppliers and item masters now, while e-invoicing is still a project rather than a compliance failure.
5. If revenue is above AED 50 million, start provider selection — the October 2026 appointment date assumes you have already evaluated the options.

Where ACOUP fits

Our accounting, tax and audit team keeps client books closed monthly, handles VAT and corporate tax filing, and prepares the schedules auditors ask for. Clients on ACOUP ERP have the ledger, VAT treatment and document flows in one system, which is the same data e-invoicing will draw on — the cleaner it is now, the smaller the 2027 project.

Sources: UAE Ministry of Finance on the Small Business Relief extension; Federal Tax Authority on simplified returns and filing deadlines; Khaleej Times on the e-invoicing service provider deadline extension. Written 18 September 2026. General guidance only — free zone treatment, reliefs and group structures change the answer, so confirm your position with the FTA or your tax adviser.