Guides
How-to guides for small importers
Plain-English walkthroughs of the math behind importing: landed cost, tariff layers, shipping weight, and when to reorder. Every guide uses real numbers you can check in our free calculators.
Landed cost
How to calculate landed cost, with a worked example
Follow one $18.75 product from the factory invoice to a $33.02 landed cost, line by line.
Read the guide TariffsHow Section 301 and stacked tariffs affect cost per unit
Why three duty layers on the same product add $7.76 a unit, and how to plan for the next change.
Read the guide ShippingThe July 2026 USPS dimensional weight change
USPS now divides by 139 and rounds every side up. Here's who pays more and how to box smarter.
Read the guide InventoryReorder point and safety stock for imported products
Set a reorder point that survives a 75-day lead time, then round the order to case pack and MOQ.
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