UAE Tax Deadlines 2026: Corporate Tax & VAT Rules

UAE Tax Deadlines 2026: Corporate Tax Filing and New VAT Supplier Rules

Two significant tax deadlines are landing back to back this autumn, and both apply to a very wide range of UAE businesses. On 30 September 2026, Corporate Tax returns are due for companies with a calendar-year financial year. The very next day, on 1 October 2026, a new FTA rule takes effect requiring businesses to verify their suppliers before claiming input VAT - or risk losing that recovery altogether.

Neither deadline is optional, and neither comes with much room for error. This guide walks through what each one requires, who it affects, and what UAE businesses should be doing right now to avoid a costly September and October.

At a Glance: The Two Deadlines

Deadline	Detail
Corporate Tax return & payment	30 September 2026, for businesses with a financial year ending 31 December 2025
Late filing penalty	AED 500/month for the first 12 months, then AED 1,000/month thereafter
Late payment penalty	14% per annum on the unpaid amount, calculated monthly
VAT supplier verification rules	FTA Decision No. 13 of 2026, effective 1 October 2026
Enhanced due diligence threshold	Suppliers exceeding AED 375,000 in a rolling 12-month period

The September 30 Corporate Tax Deadline

Who This Applies To

Corporate Tax returns and any tax owed must be submitted within nine months of the end of a business's Tax Period. For the large majority of UAE companies - those on a calendar-year financial period ending 31 December 2025 - that nine-month window closes on 30 September 2026. This is the second full filing cycle since Corporate Tax was introduced, and the FTA has been clear that it does not grant routine extensions.

The Obligation to File Exists Even Without Tax Owed

A common misconception is that filing only matters if tax is actually due. It doesn't work that way. The obligation to submit a return is separate from the obligation to pay, and businesses that qualify for Small Business Relief, or that fall entirely within the 0% Corporate Tax band, still need to file a return by the same deadline. Free zone companies, including Qualifying Free Zone Persons benefiting from a potential 0% rate on Qualifying Income, are not exempt from registering and filing either.

Filing and Payment: Two Separate Clocks

The FTA has clarified that filing and payment do not need to happen at the same moment - a business can file its return first and settle the tax owed shortly after, provided both occur within the nine-month window. Because bank transfers to the FTA can take a few days to clear, it's worth paying several days ahead of the deadline rather than on the final day itself.

Key point. Filing late and paying late are treated as two separate breaches, each carrying its own penalty. A business that is late on both will see both penalties apply simultaneously, not just the larger of the two.

What Happens If You Miss the Deadline

The Penalty Structure

Under the current administrative penalty schedule, late filing costs AED 500 for each month, or part of a month, for the first twelve months of delay - rising to AED 1,000 per month after that. Separately, unpaid tax accrues interest at 14% per annum, calculated monthly, from the day after the payment deadline until the amount is settled. These two penalties run independently and compound over time; a delay of even a few months can add up quickly, especially once both filing and payment are overdue at once.

No Extensions, No Grace Period

The FTA does not offer routine extensions for the Corporate Tax filing deadline, and penalties begin accruing the day after 30 September passes - regardless of whether the delay was intentional, an oversight, or the result of incomplete records. Waiting until the final days to prepare a return leaves very little room to fix a reconciliation error, resolve an EmaraTax access issue, or handle a delayed bank transfer.

Key point. A business that owes no Corporate Tax can still face a full penalty for simply failing to file on time. The filing obligation and the tax liability are legally distinct - don't let a zero-tax position create a false sense that the deadline doesn't matter.

The New VAT Supplier Verification Rules

What Changed

Starting 1 October 2026, a valid tax invoice will no longer be enough on its own to support an input VAT claim. Under FTA Decision No. 13 of 2026, which implements Article 54 bis of the VAT Law, the FTA can deny a business's input VAT recovery where a supply forms part of a chain connected to tax evasion - and the business knew, or reasonably should have known, about that connection. Crucially, failing to carry out the required verification checks can itself be treated as evidence that a business "should have known."

What Businesses Must Now Verify

Before deducting input VAT, a taxable person must verify the supplier's identity, confirm they have a genuine business presence, and check for relevant risk indicators. For individual suppliers, this means obtaining identification and meeting them physically or virtually. For corporate suppliers, it means verifying their incorporation and the identity of whoever is authorised to represent them. Businesses must also be able to show that each transaction had genuine commercial substance, reasonable market-based pricing, and consistency with the supplier's actual licensed activity.

Higher-Value Suppliers Need Extra Checks

For suppliers exceeding AED 375,000 in supplies over a rolling 12-month period, the verification bar rises further: businesses must also obtain written bank account confirmation and screen the supplier's public reputation and media coverage. Verification generally needs to be repeated at least every 12 months, or whenever dealing with a supplier for the first time.

A Narrow Exemption for Small Supplies

Supplies under AED 10,000 (excluding VAT) are generally exempt from these verification requirements - but only if the same supplier's total supplies stay below AED 100,000 across a rolling 12-month period. Cross that threshold, and full verification applies regardless of how small any individual invoice was.

Key point. Businesses need a written verification policy that names who is responsible for carrying out these checks, and they need to keep documented evidence that the checks were actually performed - not just that a policy exists on paper.

2026 Tax Deadline Compliance Checklist

• Step 1. Confirm your Corporate Tax Period end date and calculate your exact nine-month filing deadline
• Step 2. Complete management accounts and bank reconciliations well before the deadline, not in the final days
• Step 3. File your return even if you qualify for Small Business Relief or a 0% rate
• Step 4. Pay several days ahead of the deadline to allow for bank transfer processing time
• Step 5. Map your suppliers and identify which ones exceed the AED 375,000 enhanced due-diligence threshold
• Step 6. Put a written supplier verification policy in place before 1 October 2026, naming who is responsible
• Step 7. Start collecting and documenting supplier identity, incorporation, and commercial-substance evidence now

At QLegal, we help businesses work through both deadlines together, since the same finance and compliance teams are often responsible for handling each one.

How QLegal Consultants Helps with UAE Tax Compliance

QLegal Consultants supports businesses across the UAE with corporate, commercial, and regulatory compliance matters, including the tax obligations that come with operating a company here.

Our support includes:

• advising on Corporate Tax filing obligations and deadlines for your specific financial year
• reviewing your position ahead of the 30 September deadline, including Small Business Relief and Qualifying Free Zone status
• helping structure a written VAT supplier verification policy ahead of the 1 October rules
• advising on commercial and corporate compliance more broadly as UAE tax rules continue to evolve
• general legal advisory support for businesses managing overlapping regulatory deadlines

If you're also reviewing broader 2026 regulatory changes, our related guide on e-invoicing, tax procedures, and data protection rules may also be useful.

Key point. With both deadlines just weeks apart, checking your position now - rather than in the final days of September - gives you room to fix problems before they become penalties. Contact QLegal today for a confidential consultation.

Contact QLegal: UAE Tax Compliance Advice

QLegal Consultants provides practical legal support for businesses navigating Corporate Tax, VAT, and broader regulatory compliance across the UAE, including Dubai, Abu Dhabi, Sharjah, and the Northern Emirates.

To discuss your Corporate Tax filing or VAT compliance position, contact our team via WhatsApp, email, or through our website at qlegal.ae. We typically respond within one business day.

 

Contact QLegal Consultants today for tailored UAE legal support. Discuss Your Tax Compliance via WhatsApp.

Call / WhatsApp: +971 56 991 6077

Email: info@qlegal.ae

Location: Dubai, United Arab Emirates

** Disclaimer: This article is for general informational purposes only and does not constitute legal or tax advice. You should seek advice from a qualified UAE legal or tax professional before taking action.**