A UAE tax invoice is a document with a legally defined field list, not a branded PDF with a total on it. The fields come from Article 59 of the VAT Executive Regulations, they differ depending on whether you are issuing a full or a simplified tax invoice, and since 14 April 2026 failing to issue one within the required timeframe carries a fixed penalty of AED 2,500 per detected case under Cabinet Decision No. 129 of 2025. This guide lists the fields, explains which invoice type you are allowed to use, and covers the three things small businesses get wrong most often: the 14-day rule, foreign currency, and credit notes.
Full tax invoice: the mandatory fields
Use this when your customer is VAT-registered and the supply is above AED 10,000. Every one of these has to be on the document.
| Field | Notes |
|---|---|
| The words "Tax Invoice" | Clearly displayed. "Invoice" alone is not sufficient. |
| Supplier's name and address | The legal name on the trade licence, not a trading nickname. |
| Supplier's TRN | 15 digits. |
| Recipient's name and address | The customer's legal entity name. |
| Recipient's TRN | Required where the customer is VAT-registered. |
| A sequential or unique invoice number | Must identify the document uniquely, with no gaps you cannot explain. |
| Date of issue | |
| Date of supply | Where it differs from the date of issue. |
| Description of goods or services | Specific. "Professional services" for AED 40,000 is a weak description. |
| Unit price, quantity or volume, tax rate and amount payable — per line, in AED | The per-line breakdown is mandatory, not optional detail. |
| Any discount offered | Shown, not silently netted off. |
| Gross amount payable, in AED | |
| Tax amount payable, in AED | Plus the exchange rate applied if the invoice is in another currency. |
| A statement about reverse charge | Where the customer accounts for the VAT rather than you. |
Simplified tax invoice: when it is allowed, and what it needs
A simplified tax invoice drops the customer's details. You may issue one in two situations:
- the recipient is not VAT-registered — with no value ceiling at all, which is why retail receipts work this way; or
- the recipient is VAT-registered and the consideration for the supply does not exceed AED 10,000.
The required fields are the short list:
| Field | Notes |
|---|---|
| The words "Tax Invoice" | Still required. |
| Supplier's name, address and TRN | |
| Date of issue | |
| Description of goods or services | |
| Total consideration | Including tax. |
| Tax amount charged |
Threshold: AED 10,000 is the line for a VAT-registered customer. Above it, a full tax invoice with the customer's name, address and TRN is mandatory — and that customer needs it to recover input VAT, so they will ask.
The three rules that catch people out
1. Fourteen days from the date of supply
A tax invoice must be issued within 14 days of the date of supply. The clock starts at the supply, not at the point you decide to bill. The date of supply is generally the earliest of goods being delivered or made available, the service being completed, or payment being received — which means an advance payment can start the clock before any work is done.
This is the rule the AED 2,500 penalty attaches to. Under the amended penalty framework in force since 14 April 2026, failing to issue a tax invoice or a tax credit note within the specified timeframe is a fixed AED 2,500 per detected case. A month of "we'll invoice when the project wraps" on twelve deliveries is not a single mistake in that framework.
The practical fix is boring and works: invoice on delivery, not on milestone sentiment. If the client wants a consolidated bill, issue the invoices and send a statement.
2. Foreign currency has to be converted at the Central Bank rate
You may issue an invoice in USD, EUR or SAR. The VAT amount must still be expressed in AED, converted at the UAE Central Bank exchange rate on the date of supply, and the rate used should be visible on the invoice. Not the rate on the payment date, not your bank's rate, not last month's rate.
Two habits follow from this. First, capture the rate at the moment you raise the document and store it with the transaction — reconstructing a historical Central Bank rate a year later during an audit is miserable. Second, expect a difference between the AED you invoiced and the AED that eventually hits your account; that gap is a foreign-exchange gain or loss in the ledger, not an adjustment to the VAT you already declared.
3. Credit notes have their own rules
A tax credit note is required when the VAT on a supply changes after the invoice — a return, a cancellation, a discount agreed later, a corrected price. It needs the words "Tax Credit Note", the supplier's and recipient's details, the value of the change and the tax adjustment, and a reference to the original tax invoice. Deleting or reissuing the original invoice is not an acceptable alternative, and it breaks the sequence of your invoice numbering.
A pre-send checklist
Run this on any invoice above a few thousand dirhams before it leaves the building:
- Does it say "Tax Invoice"?
- Is the supplier TRN present and correct — 15 digits, matching your VAT certificate?
- If the customer is VAT-registered and the supply exceeds AED 10,000, is the customer's legal name, address and TRN on it?
- Is the invoice number unique and part of an unbroken sequence?
- Is the date of supply shown where it differs from the issue date, and is the invoice within 14 days of it?
- Does each line show quantity, unit price, VAT rate and VAT amount?
- Do the numbers add up — line totals to subtotal, 5% applied correctly, VAT rounded to the nearest fils, subtotal plus VAT equal to the grand total?
- If the invoice is in a foreign currency, is the AED VAT amount and the Central Bank rate shown?
- If reverse charge applies, is the statement there?
- Is a copy retained? VAT records must be kept for five years.
Point 7 sounds trivial and is the most common failure at small companies, because it usually comes from a spreadsheet template where somebody typed over a formula.
From the platform: Invoices in Staks carry both sides of the tax identity — your entity's TRN and secondary tax number, and the customer's — because those fields live on the company record and flow into every document, so a compliant invoice is the default rather than something you remember to add. VAT is applied per line, numbering is sequential, credit notes reference the original invoice, and each document stores the currency and the exchange rate used at the time, which is what makes the AED figures reconstructable years later. One honest note: Staks is not an FTA-accredited e-invoicing service provider, and the 2027 mandate will need one — see below.
What changes with e-invoicing in 2027
Everything above describes the current regime, and it does not go away. Layered on top of it, the UAE's e-invoicing mandate (Ministerial Decisions 243 and 244 of 2025) requires B2B and B2G invoices to be exchanged through Accredited Service Providers on a Peppol-based five-corner model: 1 January 2027 for businesses with revenue of AED 50 million or more, and 1 July 2027 for everyone below that. B2C is out of scope for now.
The field list becomes stricter, not looser, and the data has to be structured. A business whose customer records already carry correct legal names, addresses and TRNs will find 2027 an integration project. A business whose invoices say "Ahmed" in the customer field will find it a data-cleanup project first. There is a full guide here: UAE e-invoicing for small businesses.
Frequently asked questions
Is a quotation or a proforma invoice a tax invoice?
No. Neither creates a VAT obligation and neither entitles your customer to recover input VAT. A proforma marked as a tax invoice is a compliance problem in both directions. See quote vs invoice in the Gulf.
Do I need to issue tax invoices if I am not VAT-registered?
No — and you must not. Charging VAT or issuing a document labelled "Tax Invoice" without a TRN is a serious violation. Below the AED 375,000 mandatory registration threshold you issue ordinary invoices with no VAT line. See UAE VAT registration for small businesses.
Can I issue a tax invoice in Arabic, English, or both?
English is accepted for UAE tax invoices, and bilingual invoices are common. The FTA may request an Arabic translation, so keeping your product and service descriptions available in Arabic is prudent — and it is mandatory in Saudi Arabia, if you sell there too.
What if I discover a missing TRN on an invoice from last quarter?
Issue a corrected document properly: a tax credit note against the original and a new compliant tax invoice, both referenced to each other. Do not edit the original in place; the audit trail is the point.
Does the 14-day rule apply to recurring monthly retainers?
Yes, against each period's date of supply. Recurring invoices generated automatically on the same day each month are the simplest way to never breach it.
Related reading
- How to invoice as a freelancer in the UAE
- UAE VAT registration for small businesses
- Accounting software for agencies in the UAE
Getting the field list right is a one-time fix: correct it in your template and your customer records once, and every invoice after that is compliant by default. Start a 14-day free trial of Staks and set it up properly.