Free Guides → Duty Reduction
You're probably overpaying. Here's exactly how to stop — all within CBP's own rules.
The U.S. customs duty system has multiple legal mechanisms for reducing dutiable value and obtaining lower effective rates. These aren't loopholes — they're explicitly provided for in U.S. customs law under 19 U.S.C. §1401a. CBP expects sophisticated importers to use them.
Most importers overpay because their brokers file entries using the simplest possible method: take the commercial invoice price, declare it as entered value, apply the HTS rate, done. This is legally sufficient but often not optimal. The difference between "sufficient" and "optimal" can be millions of dollars per year at scale.
Everything in this guide is explicitly authorized under U.S. customs law. We are not describing evasion, undervaluation, or misclassification. We are describing the proper application of valuation statutes that most importers never use. CBP auditors are aware of these methods and expect to see them documented correctly.
Under 19 U.S.C. §1401a(b), certain costs that may be embedded in your invoice price are not part of the dutiable value. If your broker is declaring the full invoice price without deducting these, you're overpaying:
| Excludable Cost | Legal Authority | Typical Savings |
|---|---|---|
| International freight & insurance (CIF/DAP) | §1401a(b)(1) | 5–15% of entered value |
| Origin inland freight to port of export | §1401a(b)(4)(A) | 2–8% of entered value |
| Buying commissions to origin agent | §1401a(b)(1)(A) | 5–15% of entered value |
| U.S. design / IP / engineering fees | §1401a(h)(1)(A)(iv) | Varies — often 10–25% |
| Financing / interest charges | §1401a(b)(1)(C) | 1–3% of entered value |
To use these exclusions, the costs must be separately stated on your commercial invoice or in a supplementary document. You cannot simply subtract them without documentation. We help clients restructure their invoicing with suppliers so these costs are properly separated and documentable.
When goods move through a supply chain — factory → trading company → U.S. importer — there are multiple "sales." By default, your broker declares the last sale price (what you paid the trading company). But U.S. customs law allows you to declare the first sale price — what the trading company paid the factory — if certain conditions are met.
Factory-to-intermediary prices are typically 15–25% lower than what U.S. importers pay. On a $2M annual duty program with a 25% effective rate, declaring the first sale price instead of the last sale price could reduce your dutiable value by $300,000–$500,000 — saving $75,000–$125,000 in duties at that rate before any tariff overlays.
To use First Sale: (1) there must be at least two sales before import, (2) the goods must be "clearly destined for export to the U.S." at the time of the first sale, (3) you must have documentation of the factory invoice, and (4) you must apply for and receive CBP approval of the methodology. We manage this entire process.
While HTS classification must be accurate — not strategically manipulated — the reality is that many products have legitimate alternative classifications at different duty rates. A product that could classify under two different subheadings at 6.5% and 3.5% should obviously be classified at 3.5% if that classification is equally defensible under the GRI rules.
Tariff engineering goes further: physically modifying a product before U.S. entry (completing a manufacturing step in a different country, altering a component) can legitimately change its classification and substantially reduce duties. This requires real physical change — not paperwork changes — and must result in a genuine shift in the article's nature, use, or substantial value.
Shifting manufacturing from China to a country not subject to Section 301 or IEEPA tariffs eliminates those overlay duties entirely. Vietnam, India, Mexico, Bangladesh, and several other countries offer competitive manufacturing without the China duty burden.
This requires genuine manufacturing relocation — not just transshipment or relabeling. CBP aggressively investigates transshipment, and the penalties are severe. But for companies with 12–24 months to shift supply chains, the duty savings can be transformational.
If you import goods, process or manufacture them in the U.S., and then export the finished product, you may be eligible to recover up to 99% of the duties paid on the imported inputs through duty drawback under 19 U.S.C. §1313. This is an underutilized program — particularly for manufacturers, packagers, and companies with meaningful export activity.
Goods entering a Foreign Trade Zone are not considered "imported" until they leave the FTZ for U.S. consumption. This allows importers to: (1) defer duty payment until goods are actually sold, (2) elect the duty rate of either the imported input or the finished product (inverted tariff relief), and (3) avoid duty on goods that are re-exported. FTZs require location near a designated zone and application to the FTZ Board.
Use our interactive calculator to estimate your opportunity based on your specific entered value, duty rate, and reduction scenario:
Our duty savings calculator lets you model conservative, moderate, and aggressive reduction scenarios with live math.
Open the Calculator →Our tariff optimization program is contingency-based. $1,000/container setup + 25% of documented savings. You keep 75%. We only get paid when you recover real money — and we audit your last 6 months of entries at no charge to tell you what's there before you commit to anything.
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