What landed cost actually includes
Landed cost is what imported stock costs you standing on your own shelf: the goods, the freight and insurance, the duty, and the clearing, handling and inland transport. Pricing from the invoice value alone understates the real cost, sometimes by a third or more.
Duty rates depend on the tariff classification of your specific goods and they change, so confirm the rate for your HS code with KRA rather than reusing a figure from an article. This calculator takes the rate as an input for that reason.