Why Your Duty Bill Is 25% When the Rate Says 3%
Part 3 of “As the Importer of Record” — a series for U.S. subsidiaries of foreign parents
New to the series? Part 1 covers why your company is the Importer of Record, and Part 2 covers why your parent’s tariff codes aren’t your U.S. codes.
The rate you look up is the floor, not the bill. On top of it sits a stack of separate trade measures — and that stack is how a part with a 3% rate ends up costing you 25%.
You look up your part’s duty rate. It says three percent. You budget for three percent. Then the entry clears, and the number is nothing like three percent.
Here’s why: the rate in the tariff schedule is only the base. On top of it sits a duty stack of separate measures, and for a lot of importers, that stack is most of what they actually pay.
The base rate is just the first layer
Every tariff code carries a base rate — the ordinary duty that’s been on the books for years. For many industrial parts it’s low. Sometimes it’s zero.
But the base rate assumes a normal world. Over the last several years, the U.S. has layered extra tariffs on top of it, each with its own logic and its own trigger:
- Metal-based measures. Tariffs aimed at steel, aluminum, and copper — and, increasingly, at finished products that merely contain them. (This is the Section 232 program.) It’s often the single biggest line in the stack, and it keeps expanding to pull in more complete goods, not just raw metal.
- Country-based measures. Tariffs aimed at goods from particular countries or trading practices. (This is Section 301.) They started with China and have broadened well beyond it.
- Broad, temporary measures. From time to time the government adds across-the-board tariffs under emergency or balance-of-payments powers. These come and go — some get struck down in court, some expire on a built-in clock, sometimes within the same year they’re enacted.
- The user fees. A merchandise processing fee, and on ocean freight a harbor maintenance fee. Small individually, real in aggregate.
Stack two or three of those on a low base rate and “three percent” becomes twenty-five — without anyone touching the classification.
Not everything IN THE DUTY STACK adds — and that trips people up
Here’s the part even experienced importers get wrong: the layers don’t all pile on top of each other. Some of them replace each other.
There are measures where, if one applies, you pay it instead of another — not both. Treat the whole stack as additive and you’ll overstate your cost and quote yourself out of deals. Treat it as smaller than it is and you’ll under-collect and get a bill later. The stack has an order of operations, and knowing which layers add and which displace is the difference between a number you can quote on and a guess.
The rule that quietly governs all of it
One principle sits under everything: the tariffs that apply are the ones in force on the date your goods enter the country — not the date you quoted the job, not the date you cut the PO.
That matters because this stack moves constantly. In a single recent stretch, entire layers were added, challenged in court, struck down, and expired on statutory clocks — while others expanded. A rate that was right in the spring can be wrong by the summer. So “what’s our duty on this part?” has no permanent answer. It has a today answer, and the honest version of it always carries a date.
Why your sales team is quoting blind
Now connect it to the thing that actually costs you money. Your parent — or your own systems — quote off the product price. The stack is invisible at that stage. It doesn’t show up until the goods enter and the entry is filed.
So the quote goes out at a margin that assumes a three-percent world, and the real landed cost lands closer to twenty-five. The profit wasn’t lost in some dramatic way. It was buried in a cost nobody quoting the job could see. A good product loses money not because it’s priced wrong, but because it’s priced against the wrong number.
What to do this week
Pick one recent entry on a high-volume part and ask for the landed duty — the base rate plus every measure that actually applied, as of that entry date. Not the rate in the schedule. The real one.
Then ask the harder question: can the people who quote your jobs see that number before the quote goes out? If they can’t, your margin is being set by people looking at half the cost. That’s not a sales failure. It’s a visibility failure — and it’s fixable.
Where this goes next
The biggest single layer in most stacks is the metal-based one. And almost everyone misunderstands what puts them in it.
The intuition is “my part is made of steel, so the steel tariff applies.” That intuition is wrong — in both directions. What actually decides it isn’t what your part is made of.
Next time: it’s made of steel, and that doesn’t mean the steel tariffs apply. That’s Part 4.
Welch Customs & Trade Advisory LLC is a licensed U.S. customs broker practice focused on classification, landed-cost analysis, and duty recovery for importers who are tired of being told what to do without being told why.
This article is general information, not legal advice or a classification determination for any particular article. Trade-remedy programs change frequently; the duty owed depends on the rules in force on the date of entry.