In the UAE, VAT is due at the time of supply, and an advance payment can bring that date forward. If a customer pays you before you deliver, the VAT on the amount received generally becomes due on that earlier date. Deposits and retentions follow their own tests. Misreading them is one of the commonest causes of late-accounted output VAT.
The time of supply rule
For goods, the time of supply is generally the earliest of three events: the goods are made available or transferred, you issue the tax invoice, or you receive payment. For services, it is the earliest of the service being completed, the invoice being issued, or payment being received. If the first event is a payment, VAT on that amount is due then, even though nothing has been delivered.
The date you issue a tax invoice is also one of these events, so an invoice raised in advance can bring VAT forward for that amount. Plan invoice dates deliberately.
Part payments
An advance covers only part of the price. VAT falls due on the part received, not the whole contract. When the balance is later delivered or invoiced, VAT on the balance is due then, and the final invoice should show credit for the advance already taxed.
A worked example
| Date | Event | Net | VAT 5% |
|---|---|---|---|
| 10 March | Customer pays 30% advance on a AED 100,000 order | 30,000 | 1,500 due in the March period |
| 20 May | Goods delivered, final invoice for the balance | 70,000 | 3,500 due in the May period |
The advance invoice is issued within 14 days of 10 March. The final invoice shows the total contract value, the advance already invoiced and the balance payable. Total VAT is AED 5,000, but the timing is split across two periods and two returns.
The 14-day invoice rule
A tax invoice is due within 14 days of the time of supply. For an advance, that means within 14 days of the date you are entitled to the money. The invoice requirements are in tax invoice requirements and you can produce a compliant one with the tax invoice generator.
Deposits
Not every payment received in advance is consideration. A refundable security deposit, held to cover damage or non-performance and returned if all goes well, is not payment for a supply. VAT becomes due only if you keep it, for example because the customer defaulted, and then it is treated as consideration. The FTA has indicated that the question is whether you have unfettered rights to the money. Write the deposit terms clearly in the contract so the intent is evident.
Retentions in construction
Construction contracts often hold back a percentage of each payment until completion. Retention is a timing arrangement, not a discount, and the VAT on the retained amount is generally brought into account when it becomes due or is paid under the contract. The treatment depends on how the contract describes the supply, so contractors should review it with their adviser. See also VAT accounting entries for the postings.
Common mistakes
- Waiting to invoice until delivery when cash has already arrived.
- Treating all advances as deposits.
- Not crediting the advance on the final invoice, which double-counts VAT.
- Missing the 14-day window because the advance was never flagged to accounts.
Late-accounted VAT creates return errors that need voluntary disclosure and carries the penalties set out in VAT penalties in the UAE. If your contracts include advances, our VAT services team can set the tax point rules into your invoicing process.
Services paid in advance
For services, the same logic applies. A retainer paid on 1 January for services to be delivered over the year creates VAT on the amount received when it is received, unless the money is held in a way that gives you no right to it yet. Where the service is delivered in stages and paid on invoice, VAT follows the invoices. Continuous supplies, such as monthly subscriptions, are generally treated as supplied each billing period.
A short control for advances
- Flag every receipt in the bank feed that is not matched to an invoice.
- Ask whether the money is earned, refundable or held for a specific purpose.
- If it is consideration for a future supply, issue a tax invoice within 14 days.
- Record the advance against the order, so the final invoice credits it.
- Review unallocated receipts before every VAT return.
This catches the common situation where a customer transfers money without a request, and the accounts team parks it as a customer balance while the VAT clock runs.
If the advance is refunded
If the order is cancelled and the money is returned, the supply never happens. The VAT accounted for on the advance is corrected through a credit note, and the credit is recovered through the return for the period in which the note is issued. See VAT credit and debit notes.
Evidence of the time of supply
Keep the documents that fix the date: the contract, the delivery note or completion certificate, the invoice, and the bank record of receipt. When the tax point is questioned, these four documents answer most of the question. For long contracts, record when each stage was delivered, so that VAT can be attributed to the right period.
Writing contracts that help
A contract that states when payment is due, whether a deposit is refundable and what happens to retention makes the VAT position clear at the outset. Vague wording invites disputes over whether a payment was consideration. Review standard terms with an adviser once, and every contract benefits. For related guidance, see deemed supply and VAT credit and debit notes.
Why timing matters in practice
An advance that crosses a period end moves VAT from one return to the next. A business that expects a large advance in the last days of a period can find itself with a liability it had planned to pay a quarter later. The effect on cash is the reason finance teams should hear about large advances the day they arrive.
Frequently asked questions
Generally yes. The receipt of payment is one of the events that creates the time of supply, so VAT on the amount received falls due then, even if goods or services have not been delivered.
Within 14 days of the time of supply, which for an advance is the date you are entitled to the money.
Not while it is held as security and is refundable. VAT becomes due if you keep it, for example when the customer defaults.
Show the total contract value, the advance already invoiced and taxed, and the balance payable. VAT is then due only on the balance.
Generally it is accounted for when the retained amount becomes due or is paid under the contract. The result depends on the contract terms, so review the wording.
The return is understated and needs correcting, usually by voluntary disclosure, with penalties that depend on who finds the error first.
