Free Trade Zones (FTZ): How to Use Them to Reduce Import Duties

You import USD 5 million in components annually. The components carry a 7% duty. Your finished products carry a 3% duty. Without an FTZ, you pay USD 350,000 in duties on components. With an FTZ using the inverted tariff benefit, you pay USD 150,000 on finished goods. That is USD 200,000 saved every year, legally, with no change to your product or supply chain. This is how Foreign Trade Zones work.

What is a Foreign Trade Zone?

A Foreign Trade Zone (FTZ) is a secure area within the United States that US Customs treats as being outside US customs territory. Goods inside an FTZ have not legally "entered" the US for duty purposes.

This legal fiction creates powerful savings opportunities:

• Goods can sit in an FTZ indefinitely without paying duties
• Goods re-exported from an FTZ never incur US duties
• Manufacturers can choose to pay the duty rate on the finished product instead of individual components
• Multiple shipments can be consolidated into one weekly customs entry

There are 293 FTZ projects across all 50 states plus Puerto Rico. They are not just at ports — many are located at inland distribution centers, manufacturing plants, and industrial parks.

The four core FTZ benefits

1. Duty deferral (cash flow improvement)

Without an FTZ, duties are paid when goods arrive at the port — often weeks or months before you sell them. With an FTZ, duties are deferred until goods leave the zone and enter US commerce.

Impact: If you hold 90 days of inventory and import USD 10 million annually at 5% duty, FTZ deferral frees up approximately USD 125,000 in working capital (USD 500,000 × 90/365).

2. Duty elimination (re-exports)

If you import goods and then re-export them (to Canada, Mexico, or anywhere else), goods stored in an FTZ are never subject to US duties. Without an FTZ, you would pay duties on import and then apply for duty drawback — a refund process that takes months.

Impact: Companies with 10-30% re-export rates save the full duty amount on those goods immediately, without the drawback paperwork.

3. Inverted tariff benefit (manufacturers)

When you manufacture in an FTZ, you can choose to pay the duty rate on the finished product instead of on each imported component. If the finished product has a lower rate than the components — an "inverted tariff" situation — you save the difference.

Scenario	Without FTZ	With FTZ (inverted tariff)
Import USD 100,000 in components at 8%	USD 8,000 duty	—
Manufacture finished goods (value USD 150,000)	—	—
Enter finished goods at 2% rate	—	USD 2,000 duty (on component value)
Total duty paid	USD 8,000	USD 2,000

Note: The inverted tariff benefit applies the lower rate to the value of the foreign-origin components — not the higher finished goods value. Domestic value-added is never dutiable.

4. Weekly entry (reduced fees)

Without an FTZ, every shipment requires a separate customs entry (with associated Merchandise Processing Fee). An FTZ consolidates all entries for that week into a single weekly entry, with one MPF — capped at USD 614.35 per entry.

Impact: An importer receiving 20 shipments per week saves 19 × USD 614.35 = USD 11,672 per week in maximum MPF charges. In practice, savings depend on shipment values.

Who benefits most from an FTZ?

Business type	Primary benefit	Typical savings
Manufacturers (assembly)	Inverted tariff	2-10% of component value
Distributors (high inventory)	Duty deferral	Cash flow improvement of 5-15% of duty
Re-exporters	Duty elimination	100% of duty on re-exported goods
High-volume importers	Weekly entry	USD 10,000-50,000/year in reduced MPF
Companies facing Section 301 tariffs	All of the above	Up to 25% on re-exported/inverted goods

FTZ zone types

General Purpose Zone (Magnet Site)

A shared facility where multiple companies operate. Typically located at ports, airports, or industrial parks. Lower barrier to entry — you lease space within the existing activated zone.

• Lower setup cost and faster activation
• Shared infrastructure and CBP supervision costs
• Good for smaller importers testing FTZ benefits
• Less flexibility in operations

Subzone (at your facility)

Your own warehouse or factory is granted FTZ status. More expensive to set up, but you operate at your existing location with full control.

• Higher setup cost (application + activation)
• No need to relocate goods or operations
• Full flexibility in layout and procedures
• Best for large manufacturers and high-volume distributors

Alternative Site Framework (ASF)

A streamlined process that allows zones to designate new sites without going through the full application to the FTZ Board. Faster (30-60 days vs. 6-12 months).

What can (and cannot) be done in an FTZ

Permitted activities

• Storage (indefinite)
• Relabeling and repackaging
• Testing and quality inspection
• Assembly and manufacturing (with production authority)
• Sorting, grading, and cleaning
• Destruction of defective goods (avoiding duty entirely)
• Mixing and combining
• Display and exhibition

Requires additional authority

• Manufacturing: Requires separate "production authority" approval from the FTZ Board
• Retail sale: Direct retail sales to consumers from an FTZ are not permitted

Costs of operating in an FTZ

FTZ benefits are not free. Typical costs include:

Cost type	Typical range	Notes
Application/activation fee	USD 2,000-10,000	One-time cost
Annual zone/grantee fee	USD 3,000-25,000	Varies by zone operator
CBP annual supervision fee	USD 5,000-15,000	Based on local port charges
Per-entry/transaction fees	USD 25-75 per entry	For weekly entry filings
Space rental	Market rates	Same as any warehouse lease
Inventory control system	USD 10,000-50,000	Must meet CBP tracking requirements
Bonding requirements	Varies	FTZ operator bond required

Break-even analysis

A rough rule of thumb: FTZ benefits typically outweigh costs when annual import volume exceeds USD 1-2 million and duty rates are 3%+ (or when you re-export a meaningful percentage of imports).

How to start using an FTZ

Step 1: Determine if an FTZ makes financial sense

• Calculate your annual duty payments
• Identify inverted tariff opportunities (component rate > finished goods rate)
• Estimate your re-export percentage
• Quantify cash flow benefit of duty deferral
• Compare total savings vs. FTZ operating costs

Step 2: Find your nearest FTZ

The FTZ Board maintains a directory at ia.ita.doc.gov/ftzpage. Each FTZ has a local grantee (usually a port authority or economic development agency) that manages zone operations.

Step 3: Contact the grantee and apply

• For a general purpose zone: Apply to the grantee for activation of space
• For a subzone at your facility: Apply through the grantee to the FTZ Board
• Timeline: 30-120 days for general purpose; 6-12 months for subzone

Step 4: Set up operations

• Install compliant inventory control system (must track every item from admission to withdrawal)
• Establish security measures meeting CBP requirements
• Get your zone activated by CBP (physical inspection of facilities)
• Train staff on FTZ procedures

Step 5: Begin operations

• Admit goods into the zone (file CBP Form 214)
• Choose your status designation: Privileged Foreign (lock in current rate), Non-Privileged Foreign (pay rate at time of entry), or Zone Restricted
• Perform permitted activities
• File weekly entry when goods leave zone for US commerce

FTZ vs. bonded warehouse

Both defer duties, but they are not the same:

Feature	FTZ	Bonded Warehouse
Storage limit	Unlimited	5 years maximum
Manufacturing allowed	Yes (with authority)	No (limited manipulation only)
Inverted tariff benefit	Yes	No
Weekly entry	Yes	No (per-shipment entry)
Goods can be destroyed	Yes (no duty owed)	Limited
Setup complexity	Higher	Lower
Best for	Manufacturers, large volume	Short-term storage, simple deferral

FTZ and Section 301 tariffs

Since 2018, Section 301 tariffs (up to 25% on Chinese goods) have made FTZs more valuable than ever. Key considerations:

• Re-exports: Goods admitted to an FTZ and re-exported avoid Section 301 tariffs entirely
• Manufacturing: If you manufacture in an FTZ and the finished product's HTS code is not on the 301 list, you may avoid 301 tariffs through substantial transformation
• Duty deferral: Even if 301 tariffs apply, deferring a 25% duty on high-value inventory significantly improves cash flow
• Caution: CBP scrutinizes FTZ manufacturing claims related to 301 tariff avoidance. Ensure genuine substantial transformation.

Key takeaways

• FTZs legally defer, reduce, or eliminate US import duties
• Four core benefits: deferral, elimination on re-exports, inverted tariff manufacturing, weekly entry
• 293 FTZs operate across all 50 states — find one near you
• Most cost-effective when importing USD 1M+ annually at duty rates above 3%
• Manufacturers with inverted tariffs (component rate > finished goods rate) see the biggest savings
• FTZ is more powerful than a bonded warehouse but more complex to set up
• Section 301 tariffs at 25% have made FTZs even more attractive for re-exporters and manufacturers
• Start with a cost-benefit analysis — then contact your local FTZ grantee