The Truth About Tariff Accounting: How Product Businesses Should Classify Import Costs

Sam's List Editorial | 2026-06-06

The Truth About Tariff Accounting: How Product Businesses Should Classify Import Costs Most product businesses are accounting for tariffs wrong. They're expensing import duties when the invoice hits, treating them like a utility bill or a software subscription. Under GAAP, that's incorrect — and the distortion it creates in your financials is worse than you'd expect. Tariffs are part of the cost to acquire inventory. Under ASC 330, they belong in inventory cost, not period expenses. Expensing them immediately understates your cost of goods sold and overstates your gross margin in the periods when you're buying but not yet selling. Then when the inventory moves, your COGS is understated again, just in the other direction. With tariff rates in 2026 running high and volatile on a wide range of imported goods, getting this classification right matters more than it did in a stable-rate environment. The numbers are too large to misclassify. GAAP Requires Capitalization, Not Expensing ASC 330 — the GAAP standard governing inventory — requires that inventory be measured at cost, where cost includes "all direct and indirect costs incurred in bringing the inventory to its existing condition and location." Import duties are explicitly part of that definition. That means tariffs paid when goods clear customs are not a separate expense line on your P&L. They increase the carrying cost of your inventory on the balance sheet. They hit your income statement only when the inventory is sold — as part of COGS. The alternative treatment — expensing duties as a period cost when paid — is a cash-basis instinct. It feels intuitive because the cash goes out when the duty is charged. But GAAP doesn't follow cash timing on inventory acquisition costs. It follows the matching principle: costs are recognized when the revenue they helped generate is recognized. If you're on accrual-basis GAAP financials (which any business seeking investors, lenders, or a clean audit should be), inventory cost capitalization is not optional. Landed Cost: What the Number Actually Includes "Landed cost" is the accounting term for the total cost to get a unit of inventory to its first point of sale. It's the number that should be in your inventory cost layer, and it includes more than just the purchase price on the supplier invoice. A complete landed cost typically includes: Purchase price — what you paid the supplier Ocean or air freight — the cost to ship from origin to port or warehouse Customs duties and tariffs — import levies assessed at the border Customs broker fees — service fees for clearing...