UAE Corporate Tax Deadline: 30 September 2026

Businesses with a financial year ending on 31 December 2025 should prepare to file their UAE Corporate Tax Return and settle any Corporate Tax payable by 30 September 2026.

Under the general UAE Corporate Tax filing rules, taxable businesses must submit their return within nine months from the end of the relevant tax period. Preparing early allows businesses to review their records, identify accounting errors and avoid last-minute filing complications.

Who Does the 30 September 2026 Deadline Apply To?

The 30 September 2026 Corporate Tax deadline generally applies to businesses whose tax period runs from 1 January 2025 to 31 December 2025.

The filing requirement may apply to:

• UAE mainland companies
• Free zone companies
• Qualifying Free Zone Persons
• Foreign companies with a taxable presence in the UAE
• Other taxable persons registered for UAE Corporate Tax

A business benefiting from a 0% Corporate Tax rate may still have registration, record-keeping and return-filing obligations.

What Must Businesses Complete Before the Deadline?

Before submitting a UAE Corporate Tax Return, businesses should ensure that their financial and accounting records are accurate and complete.

Important preparations may include:

• Finalising the financial statements for the tax period
• Reconciling business income and expenses
• Reviewing taxable and exempt income
• Identifying non-deductible expenses
• Calculating taxable income
• Reviewing related-party transactions
• Checking available tax losses or reliefs
• Preparing the required supporting documents
• Calculating the final Corporate Tax liability
• Filing the return through the EmaraTax portal
• Paying any Corporate Tax due

Documents Required for Corporate Tax Filing

The documents required may differ depending on the company’s activities, structure and tax position. Businesses should generally prepare:

• Trial balance and general ledger
• Profit and loss statement
• Balance sheet
• Bank statements and reconciliations
• Sales and purchase records
• Expense invoices and receipts
• Fixed asset register
• Payroll and employee-related records
• Related-party transaction details
• Tax registration information
• Previous tax records, where applicable
• Supporting documents for exemptions, reliefs or adjustments

Maintaining organised records can make the filing process more accurate and reduce the risk of inconsistencies.

Common Corporate Tax Filing Mistakes

Corporate Tax errors can result from incomplete records, incorrect calculations or misunderstandings about filing obligations.

Common mistakes include:

• Waiting until the deadline to prepare the return
• Using incomplete or unreconciled accounting records
• Treating personal expenses as business expenses
• Claiming expenses without supporting documents
• Incorrectly calculating taxable income
• Overlooking related-party transaction requirements
• Assuming a free zone company does not need to file
• Missing available tax reliefs or adjustments
• Entering incorrect information in the tax return
• Filing the return without conducting a final review

A careful review before submission can help businesses identify and correct these issues.

What Happens If a Business Misses the Deadline?

Failure to file a Corporate Tax Return or pay the applicable tax within the prescribed period may result in administrative penalties.

Late preparation can also create additional problems, including incomplete calculations, missing supporting documents and errors in the submitted return. Businesses should therefore confirm their applicable deadline and take action early.

When is the UAE Corporate Tax deadline for a financial year ending on 31 December 2025?

The general filing and payment deadline is 30 September 2026, which is nine months after the end of the relevant tax period.

Does a free zone company need to file a Corporate Tax Return?

A free zone company may still be required to register, maintain records and file a Corporate Tax Return, even if it qualifies for a 0% rate on qualifying income.

Where is the Corporate Tax Return submitted?

Corporate Tax Returns are submitted electronically through the UAE Federal Tax Authority’s EmaraTax portal.

Is the Corporate Tax payment deadline the same as the filing deadline?

Generally, any Corporate Tax payable must be settled within the same nine-month period applicable to filing the return.

Should a company wait until September 2026 to begin preparing?

No. Businesses should finalise their accounts and review their tax position well in advance. Starting early provides time to correct errors and gather missing information.

Prepare for the UAE Corporate Tax Deadline

Businesses with a financial year ending on 31 December 2025 should treat 30 September 2026 as an important compliance date.

Accurate bookkeeping, complete supporting documents and a detailed review of the company’s tax position are essential for completing the filing correctly and on time.

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