The order of calculation
- CIF value. Invoice value plus freight plus insurance, converted at the customs rate on the declaration date. Currency movement between order and clearance is a live risk here and should be tested as a scenario, not assumed away.
- Import duty. CIF multiplied by the ECOWAS CET rate for your line. Duty relief exists for some agricultural and industrial inputs and for approved investments.
- ECOWAS levy. A small percentage of CIF, commonly 0.5%, on goods from outside the region.
- Goods and Services Tax at 15%. Charged on a base that includes CIF plus duty plus levies and any excise, so it is always larger than 15% of your invoice.
- Port, clearing and inland costs. Queen Elizabeth II Quay handling, shipping line charges, agent fees, storage and demurrage, and delivery within Freetown or upcountry.
Where importers get caught
- Applying GST to the invoice value instead of the duty-inclusive base.
- Ignoring exchange-rate movement on a shipment that takes weeks to clear.
- Underestimating storage on small consignments that wait for documents.
- Assuming an ECOWAS-origin exemption without a valid certificate of origin.
An illustrative worked example
A retailer imports a part-container of dry goods. Goods value US$9,000, freight US$1,400, insurance US$100. CIF is US$10,500.
At a 20% duty rate, duty is US$2,100. The ECOWAS levy at 0.5% adds US$52.50. GST at 15% on US$12,652.50 is US$1,897.88.
Port handling, agent fees, storage and local delivery of US$1,250 bring the landed total to about US$15,800 — about 76% above the supplier invoice, because freight and fixed clearing costs weigh heavily on a small shipment.
The figures above are illustrative and use round duty bands to show the method. They are not a quotation and not a customer result.
Verify before you commit
Cardinal Toolworks does not publish live tariff rates, and no honest tool should. Rates, levies, exemptions and minimum charges change, and origin changes them again. Confirm your tariff line and the current rates with National Revenue Authority or your licensed clearing agent, record the source and the date, and enter those figures into the calculator. TrueCost keeps that verification record on the report.
The method itself is the same everywhere: how to calculate landed cost, what belongs in a VAT or GST calculation base, and how an HS code decides a duty rate.