Input Tax Apportionment

Input tax apportionment is the method a VAT-registered business uses to determine how much VAT on shared costs it can recover when it makes both taxable and exempt supplies. A cost used wholly for taxable business activity is usually treated differently from one used wholly for exempt activity.

Shared overhead requires an allocation that follows the jurisdiction's VAT law and guidance, not an arbitrary management percentage. Start with direct attribution by identifying purchases used only for taxable supplies and those used only for exempt supplies.

A retailer's stock for taxable sales may be straightforward, while a residential letting expense may have different recovery treatment, and a direct link to taxable sales does not override a specific statutory block or documentation requirement. Only genuinely residual or shared costs, such as head-office rent, accounting software and general marketing, belong in the pool, so do not put every invoice there just because the finance team cannot immediately classify it, since better coding makes the calculation more faithful to how resources are used.

The UAE Federal Tax Authority publishes guidance on input tax apportionment and special methods, and its standard method and adjustments need to be followed where applicable. A business seeking an alternative method may need an approved route.

The details of numerator, denominator and excluded supplies matter, so a simple ratio of taxable turnover to all turnover is an illustration, not a universal UAE formula for every entity, and the result can differ materially from the quick calculation. Zero-rated supplies generally count as taxable for VAT purposes, even though the output rate is zero, whereas exempt supplies are different and commonly restrict related input recovery.

Confusing the two can cause a business to underclaim or overclaim, so check the legal classification of a supply rather than reasoning from whether VAT appears on the customer invoice. Documentation is critical: retain tax invoices, expense coding, supply reports, calculation worksheets and the rationale for any method, and reconcile the figures to VAT returns and the general ledger, because a correct rate applied to unreliable source data still produces a wrong claim.

An annual adjustment can compare provisional or periodic recovery with the full-year position under the relevant rules, so plan for the cash effect before year-end. A firm with an expanding exempt line may need to repay input VAT that it previously expected to recover.

Finance should monitor the mix of activity during the year rather than wait for an auditor to find the difference. Special methods aim to produce a more fair and reasonable result when a standard proxy does not reflect the use of costs, so a bank might use transaction counts, floorspace or other measures for particular expenses if the law permits and the authority approves the method where required.

Do not switch to a favourable percentage without following the FTA process, because the test is accuracy under the regime, not the largest refund. For a material mixed-activity business, check the latest FTA guide and obtain tax advice before filing a complex claim.