Most audit findings do not come from ignorance of the rate, but from an incomplete invoice, an input deduction that was not due, or a transaction reported in the wrong period.
1 Computing the tax
Three common cases
- An amount exclusive of tax: tax = amount × rate
- An amount inclusive of tax: tax = amount × rate ÷ (1 + rate)
- Net tax due for the period = output tax − deductible input tax
Assuming a 15% rate and an amount of SAR 2,300:
| Case | Calculation | Tax | Total |
|---|---|---|---|
| Exclusive | 2,300 × 15% | 345 | 2,645 |
| Inclusive | 2,300 × 15 ÷ 115 | 300 | 2,300 |
The cost of getting it wrong: treating an inclusive amount as exclusive bills the customer for more than is due; the reverse means the business pays the tax out of its own margin. State it explicitly in quotes and contracts: “the price is inclusive / exclusive of value added tax”.
2 Conditions for deducting input tax
- The business must be registered for VAT.
- The purchase must be for the purposes of the taxable economic activity, not personal.
- It must hold a valid tax invoice with the required particulars.
- The item must not be among the exclusions the regulations bar from deduction.
- The deduction must be claimed within the statutory period allowed.
Expenses that are usually not deductible
Hospitality and entertainment, expenses of a personal nature, and certain vehicles and their uses — the regulations bar or restrict deduction of their tax. Check the text of the regulations before deducting: these are the items most often adjusted on audit.
3 The tax invoice
An invoice is not merely a demand for payment; it is the basis of your right to deduct and the evidence of your compliance. Its essential particulars include:
| Particular | Note |
|---|---|
| Date of issue and a sequential number | No duplicates and no unexplained gaps |
| Supplier’s name, address and tax number | Essential for the invoice to be accepted |
| Customer’s name and tax number | On business-to-business invoices |
| Description of the goods or services and quantities | A clear description, not generic wording |
| Amount before tax, the rate, and the tax amount | Shown separately, not merged |
| Total including tax | — |
In the Kingdom e-invoicing applies in two phases: the generation and archiving phase electronically, then the integration phase with the Authority’s system, according to groups and timetables the Authority announces for each category of taxpayer.
4 Credit and debit notes
If the value of a supply changes after the invoice — a return, a later discount, or a pricing error — the original invoice is not amended. A credit note (to reduce) or a debit note (to increase) is issued, linked to the original invoice number, and its effect is reflected in the period’s return.
5 The return and payment
Gather the data
Sales and purchases for the period
Reconcile
Books against invoices and the system
Complete the return
According to the boxes on the form
File and pay
Before the statutory deadline
Archive
Documents, the return and the payment receipt
The filing frequency (monthly or quarterly) is set by the level of supplies under the law
| Item | Base | Tax |
|---|---|---|
| Sales taxable at the standard rate | 1,800,000 | 270,000 |
| Zero-rated exports | 400,000 | 0 |
| Total output tax | — | 270,000 |
| Deductible purchases and expenses | 1,200,000 | 180,000 |
| Tax on hospitality (not deductible) | 40,000 | Excluded |
| Net tax payable | — | 90,000 |
Note that exports are reported in the return at zero rather than omitted, and that the hospitality tax was excluded from deduction even though an invoice exists.
Lesson summary
- State explicitly in quotes and contracts whether an amount is inclusive or exclusive of tax.
- Deduction requires registration, business purpose, a valid invoice, no exclusion, and timeliness.
- The tax invoice is the basis of deduction, and missing particulars forfeit the right.
- Later adjustments are made by credit or debit note, not by amending the original invoice.
- Zero-rated supplies are reported in the return, not omitted.
6 Test yourself
Three quick questions
Choose the answer you think is correct — the result appears immediately.
1. An amount of SAR 1,150 is inclusive of 15% tax. How much tax does it contain?
1,150 × 15 ÷ 115 = 150, and the base is 1,000. Multiplying an inclusive amount by 15% gives the wrong figure.
2. Purchases for customer hospitality supported by a valid tax invoice. Is the tax deductible?
A valid invoice is a necessary condition, not a sufficient one; the item must also not be excluded by the regulations.
3. A customer returned goods after the invoice was issued. What is the correct step?
A credit note preserves the trace of the original transaction and documents the adjustment, unlike amending or deleting the invoice.