The FBA Fee Math That Makes Direct Import Worth Running Seriously

Amazon raised FBA fulfillment fees in February 2024. They adjusted the fee structure again in 2025 — and while some adjustments nominally reduced fees on lighter items, the effective cost per unit for most standard-size products that Amazon-native sellers carry has increased consistently year over year since 2019.

If you are running a $2M to $10M FBA business and you have not seriously modeled the unit economics of direct importing your top three to five SKUs, you may be leaving a meaningful margin improvement on the table.

This post walks through the math, explains what “direct import” actually requires operationally, and gives you a framework for deciding whether it is worth pursuing for your business.

What “Direct Import” Means in Practice

“Direct import” in the Amazon seller context means buying inventory from your manufacturer or supplier, shipping it to the US yourself (or through a freight forwarder), clearing US customs, and either sending it directly to FBA or storing it at a third-party 3PL before Amazon inbound.

The alternative — what most Amazon sellers using FBA actually do — is buying inventory from a domestic distributor, using a prep center that handles Amazon compliance, or sourcing from Alibaba Trade Assurance with the supplier handling DDP (Delivered Duty Paid) shipping to Amazon.

DDP sounds easier because the supplier handles customs and delivery. It is easier. It is also structurally more expensive because the supplier or DDP freight forwarder is building their margin into the landed cost you pay.

When you take control of the import, you take on the complexity — but you also capture the margin.

The Unit Economics Framework

Here is a simplified model. Run this against your own numbers.

Current state (buying DDP or from distributor)

Item	Per unit estimate
Product cost (FOB from supplier)	$12.00
DDP shipping + customs (supplier-managed)	$4.50
FBA fulfillment fee (standard size, ~1 lb)	$3.54
FBA storage (monthly average, 6 months)	$0.45
Total landed + fulfilled	$20.49

Direct import scenario

Item	Per unit estimate
Product cost (same FOB)	$12.00
Ocean freight (LCL/FCL amortized per unit)	$1.80
US customs duties (example: 10% on $12 FOB)	$1.20
Customs broker fee (amortized per unit)	$0.15
FBA prep in-country (labeling, poly bag)	$0.40
FBA fulfillment fee (same)	$3.54
FBA storage (same)	$0.45
Total landed + fulfilled	$19.54

Savings per unit: $0.95. On 10,000 units, that is $9,500. On 50,000 units, it is $47,500 — roughly the cost of half a full-time employee.

These are illustrative numbers. The actual delta depends on your product weight and dimensions (FBA fee tier), your origin country (freight rates vary significantly), your HTS code duty rate (ranges from 0% to 145%+ depending on category and Section 301 / IEEPA applicability), and whether you are currently buying DDP or already on FOB terms.

Where the Savings Come From

Ocean freight vs. express air or DDP premium. A 20-foot container (FCL) carrying 2,000–3,000 units from Guangzhou to Los Angeles runs approximately $2,500–$4,500 in a normalized freight market. Per-unit, that is $0.80–$2.25 depending on product density. DDP freight arranged by a Chinese supplier typically costs 30–50% more per unit, because they are adding a margin and using their forwarder relationship, not yours.

In-country FBA prep. Having your supplier or a China-based prep center apply FNSKU labels, poly bags, and carton marks before shipping — rather than at a US 3PL — saves $0.30–$0.80 per unit depending on prep complexity. Amazon’s FBA prep fees run $0.40–$0.80 per unit for standard items; China labor costs are a fraction of US rates.

Customs duty optimization. If you are paying duties on a DDP price that includes freight and supplier margin, you are overpaying. Customs duties are assessed on the commercial invoice value (typically FOB), not the DDP price. By controlling the import, you pay duties on the lower FOB value.

What Direct Import Requires You to Handle

1. ISF filing (Importer Security Filing) US Customs requires an ISF filed at least 24 hours before cargo loads at the foreign port. Your customs broker handles this. It is not complex, but it requires coordination between you, your supplier, and the broker at a specific point in the timeline.

2. HTS classification Every product imported into the US is assigned an HTS (Harmonized Tariff Schedule) code that determines the applicable duty rate. Your customs broker will classify your product, but you should understand the code and applicable duty rate before you model unit economics. The USITC HTS search tool is publicly available.

3. Customs bond You need a customs bond to import goods into the US. A single-entry bond runs approximately $50–$100 per shipment. A continuous bond (covers all entries in a 12-month period) runs approximately $400–$600 per year and is cost-effective if you import more than four to six shipments per year.

4. FBA inbound shipment creation You need to create the inbound shipment in Seller Central before the container arrives, coordinate carton labels with your supplier, and manage the reconciliation if Amazon receives short or loses units.

5. Lead time management Ocean freight from China adds 20–35 days of transit time compared to air freight. Your restock cycle needs to extend accordingly. Most FBA sellers modeling direct import for the first time underestimate the total lead time: factory production + QC + booking + transit + customs clearance + Amazon inbound processing = 90–120 days from PO to available inventory.

How to Model This for Your Top SKUs

Step 1 — Pull your top 5 SKUs by unit volume. These are the candidates. Small-volume SKUs do not justify the operational overhead of direct import until you are running a high total volume.

Step 2 — Get FOB pricing from your supplier. If you are currently buying DDP, ask your supplier for an FOB quote from the origin port. The difference between DDP and FOB is approximately your starting margin opportunity.

Step 3 — Get an ocean freight quote. Contact a freight forwarder with your origin city, destination port, and estimated CBM (cubic meters) or weight. Freightos provides instant marketplace quotes and is a reasonable benchmark.

Step 4 — Look up your HTS code and applicable duty rate. Use hts.usitc.gov. Check both the base MFN rate and whether your HTS code carries Section 301 or IEEPA additional duties.

Step 5 — Model the delta. Compare total landed + fulfilled cost vs. current total landed + fulfilled cost. If the delta is greater than $0.50/unit and your annual volume is above 20,000 units, the operational investment typically pays back within 6–12 months.

Common Objections (and Straight Answers)

“I don’t have time to manage this.” You don’t manage it — a freight forwarder and customs broker manage the logistics and filing. You manage the PO, the booking, and the inbound creation. Net additional time: 2–4 hours per shipment once the relationships are established.

“My supplier doesn’t want to do FOB.” Some suppliers prefer DDP because they profit from the freight arrangement. You can insist on FOB; it is standard trade practice and the supplier does not have to arrange freight beyond loading at the origin port. If a supplier refuses FOB, that is worth understanding why.

“What if my products have high Section 301 duties?” Then your duty cost is higher, and the direct import savings may not fully offset it. For some categories at 25% or higher tariff rates, the duty cost dominates the math. In that case, the more productive exercise is exploring whether alternative sourcing (Vietnam, Mexico, India) reduces your exposure.

The Practical First Step

The fastest way to know whether direct import makes sense for your business is to model one SKU end-to-end with real numbers. That means a freight quote, an HTS classification, and a unit economics comparison.

At BZS, we do this as part of an initial consultation. We look at your top-volume SKUs, your current supplier terms, and your freight structure, and we give you a clear picture of where the direct import opportunity is and what it takes to execute. Our landed-cost simulation gives you accurate planning numbers before you commit to a purchase order — not a back-of-envelope calculation.

If that sounds useful, reach out. No obligation — just a real conversation about your numbers.