A purchase price plus one fixed tariff percentage no longer supports 2026 U.S. margin planning. Duty-free de minimis changed globally, while temporary and product-specific measures apply by entry date, HTS and exception.

1. The old low-value shipment assumption is no longer valid

CBP guidance states that China-origin products ceased receiving the prior duty-free de minimis treatment on May 2, 2025. The United States then suspended duty-free de minimis treatment for all countries effective August 29, 2025. In 2026, low value no longer means automatic duty-free entry, and postal and nonpostal channels have different mechanics.

Redesign data around transportation mode, entry type, carrier and Importer of Record—not order value alone. Splitting shipments, undervaluation or false origin is not a cost strategy and can cause detention or penalties. Include entry, brokerage, processing, duty cash and returns in the model.

  • Origin rather than shipping country
  • Postal, express and freight modes
  • Entry type and reporting data
  • Importer of Record
  • Brokerage, processing and duty cash

2. Date and scope every 2026 temporary measure

As of July 18, 2026, the February 20 proclamation imposed a 10 percent ad valorem temporary import surcharge on many covered articles, effective February 24 and scheduled through 12:01 a.m. EDT on July 24 unless earlier changed or terminated, or extended by Congress. The proclamation contains product, Section 232, USMCA and other exceptions and stacking rules.

The 10 percent is therefore a dated transaction rule, not an annual standard cost. A June Section 232 action for steel, aluminum and copper further changes product-specific treatment. Confirm each SKU from the current HTS Chapter 99 notes, proclamations and qualified customs review rather than applying a headline rate. This paragraph is a July 18, 2026 snapshot; any model used or published later—especially on or after July 24—requires a fresh official-source check first.

  • Entry date and effective time
  • Base HTS and Chapter 99
  • Section 301, 232 or other measures
  • Temporary-surcharge exceptions
  • Expiration, modification and version control

3. Landed cost begins with customs value but extends beyond it

Duty commonly begins with customs value under the applicable valuation method. CBP explains that the commercial invoice generally starts from the price paid by the U.S. buyer and may require additions for assists, royalties, selling commissions, packing or proceeds. International freight and insurance have specific treatment, while related-party pricing needs separate support.

The finance model then adds ordinary duty, additional measures, Merchandise Processing Fee, broker, bond, port charges, international and domestic freight, insurance, warehousing, returns and loss. Customs value, inventory cost and channel margin are connected but distinct layers that need a reconciliation.

  • Invoice price and valuation additions
  • Ordinary and additional duties
  • MPF, brokerage and bond
  • International and domestic logistics
  • Returns, loss and warehousing

4. Build dynamically by SKU, entry date and channel

Master data should retain ten-digit HTS, description, material, origin, supplier, valuation method and special measures. Transaction data should retain entry number, date, quantity, value, actual duty and fees. This enables estimate-to-actual comparison before liquidation and supports inventory and COGS adjustments.

Pricing should show current, post-expiry and adverse scenarios for DTC, marketplace and wholesale unit margin and cash needs. After de minimis suspension, direct parcel fulfillment may need comparison with bulk import and U.S. fulfillment, including speed, returns, inventory turns and IOR responsibility.

  • SKU HTS and origin master
  • Entry-level value, duty and fees
  • Estimate-to-actual variance
  • Channel margin and cash cycle
  • Current, expiry and adverse scenarios

5. Connect customs, inventory and the ledger every month

Obtain entry summaries and duty statements from the broker, allocate by entry and SKU, and match supplier invoices, logistics and cash. Do not expense every duty payment immediately while ignoring inventory still on hand; confirm the company's accounting method and applicable Section 263A treatment.

Maintain a tariff change log with official source, issue date, effective and end dates, HTS scope, system update and approver. The management margin bridge should separate FX, purchase price, duty, freight and channel fees so pricing decisions follow verifiable drivers rather than attributing every decline to tariffs.