Foreign Trade Zones aren't a tax loophole. They're a 90-year-old federal program that 3,000+ U.S. companies already use to legally defer, reduce, or eliminate customs duties — and most of your competitors are already doing it.
There's no single FTZ magic trick. The savings stack across five distinct mechanisms — and depending on your business, some matter more than others. Here they are, in plain English, with math.
In a normal import flow, you pay duty the moment the container clears Customs. In an FTZ, you pay duty only when the goods are released into U.S. commerce. Goods that sit in your zone for 6 months — slow movers, safety stock, seasonal inventory — accrue zero duty until they ship to a customer.
Goods that arrive in your FTZ and ship back out of the U.S. — to Mexico, Canada, the Caribbean, anywhere — are never considered to have entered U.S. commerce. Zero duty owed. For retailers with North American distribution, or for any company doing destruction or returns processing, this mechanism alone can be enormous.
U.S. tariff schedules are not consistent — sometimes a raw material or component is taxed at a higher rate than the finished product it goes into. In an FTZ, with the right approval, you can manufacture the finished product inside the zone and elect to pay the lower of the two rates when it ships out. For automotive, electronics, and pharma manufacturers, this is often where the largest savings live.
The Merchandise Processing Fee is 0.3464% of entered value, capped at $634.62 per entry. Without an FTZ, every entry — and every container — carries its own MPF. With an FTZ weekly entry, you can consolidate every shipment leaving the zone in a 7-day window into a single CBP filing. One entry. One cap. Massive savings for high-volume importers.
Federal law exempts inventory held in an FTZ from state and local ad valorem taxation. In states with significant inventory taxes — Texas, Louisiana, Mississippi, Kentucky, West Virginia — this can be one of the single largest line items. Combine it with the federal duty mechanisms and the FTZ pays for itself many times over.
It was, before software like Mamora existed. Modern FTZ platforms cut compliance work by 80–95%. The savings now massively outweigh the operational cost — typically by 10x or more in year one.
You don't need one. Distribution centers, retail DCs, and e-commerce fulfillment sites are all eligible. Inverted tariff is just one of five savings mechanisms — the other four apply to pure-play distribution operations too.
Subzone or magnet site activation under the Alternative Site Framework now takes 3–6 months. Most retailers can be operational within a single quarter if they push.
CBP audits an FTZ on average every 3–5 years. With Mamora, your entire audit package — every admission, every movement, every filing — is one click away. Customers using Mamora have had zero adverse findings since 2023.
Brokers handle entries. They don't run inventory methodology, manage FIFO layers, or build duty savings reports for your CFO. An FTZ is operations — not brokerage — and that's what Mamora handles.
Tariffs aren't going away — they're going up. Section 301 rates have been ratcheted up under both major administrations. The MPF cap and state property tax exemption alone usually justify the program even if every duty were repealed tomorrow.
The Foreign-Trade Zones Act passed in 1934. There are now 293 active zones across all 50 states. Among the active operators: Samsung, BMW, Mercedes-Benz, Pfizer, Caterpillar, Whirlpool, GE, Boeing, Tesla, and most of the Fortune 100 that imports anything.
If your competitors are using an FTZ and you aren't, you are paying duty they aren't. That cost shows up on the shelf.
Apply for FTZ activation through your local Grantee under the Alternative Site Framework. We can recommend a consultant. ~3 months.
Mamora deploys, connects to your ERP and WMS, ingests your part master and historical activity. ~4 weeks.
Parallel run with your existing process. We file 214s on one product line first and prove out the workflow. ~2 weeks.
Full cutover. Mamora handles every admission, movement, and weekly entry. Savings show up in your next CFO report. Permanent.