This investigation highlighted a gap between the exchange-rate basis used to obtain foreign currency and the basis used to value imports for customs. That gap can reduce public revenue and distort competition, but its size depends on the applicable tariff, exemptions, valuation date and declared customs value.
Official-FX and customs valuation rules may apply different bases
Two exchange-rate bases on the same import
A gap between the exchange-rate basis used to finance imports and the basis used for customs valuation can transfer part of the policy benefit away from the treasury and distort competition between formal and informal importers. The size of that effect cannot be measured from the exchange-rate difference alone.
A proper estimate starts with transaction-level customs value, tariff code, statutory rate, exemptions and the legally applicable valuation date. The revenue difference is then calculated duty by duty. Applying one headline exchange-rate gap to total imports would ignore zero-rated goods, exemptions and product-specific charges.
Why the headline gap is not the revenue loss
Under-valuation reduces customs revenue and can favour firms with better access to administrative treatment. Over-valuation, however, can raise consumer prices and create incentives for evasion. The objective is a predictable rule consistent with law and trade practice, not simply the highest possible valuation.
Fair valuation is not maximum valuation
The public record can demonstrate that different valuation bases or circulars existed at particular dates. It cannot show that a particular importer underpaid without the declaration, commodity classification and assessment. A policy gap is not automatically a false declaration.
A reconciliation for customs, banks and tax
Customs, the central bank and commercial banks should use aligned transaction identifiers and exchange-rate dates. Risk analysis can target abnormal unit values, inconsistent classifications and repeated exemptions, while appeal procedures protect legitimate traders from arbitrary reassessment.
Publish the legal valuation rule and every change with an effective date, plus aggregate import value, assessable value, exemptions and revenue by tariff chapter. A reconciliation with financed foreign currency would show how much of the import economy enters the tax base.
Editorial method: This investigation rebuilds the original calculation from the linked public records, preserves the source period and transaction stage, and separates documented figures from estimates, interpretation and allegations.
Mohamed Algarj
Mohamed Algarj