Customs Duty & Import Tax: A Cross-border Seller's Guide (2026)
You sourced a product from a factory in Shenzhen for $4 per unit. You're going to sell it on Amazon US for $24.99. Seems like a healthy margin, right? But somewhere between the factory door and the Amazon fulfillment center, customs is going to take a cut — and if you haven't factored that in, your margins just evaporated.
Import duty isn't one of those costs you can figure out "later." It hits when your goods clear customs at the border, and by then you can't adjust your pricing. The customs broker is standing there with a bill, your container is sitting at the port racking up demurrage charges, and you either pay or your goods don't move.
The good news: duty rates are predictable if you know your product's HS code and the destination country's tariff schedule. This guide walks through how to estimate customs duty before you place a production order, what de minimis thresholds protect small shipments, and how DDP shipping arrangements shift the responsibility around.
Quick answer: Most consumer goods imported into the US face a duty rate of 0-7% of the customs value (product cost + shipping + insurance). The US de minimis threshold is $800 — shipments valued under this enter duty-free. The EU's de minimis was abolished in 2021; all commercial goods are now subject to VAT and duty regardless of value.
What Customs Duty Actually Is (and What It Isn't)
Customs duty is a tax levied by a government on goods imported across its border. It's calculated as a percentage of the customs value — which is typically the price you paid for the goods plus shipping and insurance to the port of entry. This is called CIF (Cost, Insurance, Freight) valuation in most countries.
Duty is not the same as VAT or sales tax. Duty is charged at the border by customs. VAT is charged on the final sale to the consumer. You can pay duty on import and then charge VAT on the retail sale — they're separate taxes at separate stages. In the EU, your imported goods may be subject to both import duty and import VAT at customs clearance, and then output VAT when you sell to the end customer.
The duty rate depends on two things: the HS code (Harmonized System code, an internationally standardized product classification) and the country of origin. A cotton t-shirt from China entering the US faces a different rate than the same t-shirt from Bangladesh, because of trade agreements and tariff preferences.
HS Codes: The 6-Digit Key That Determines Your Rate
Every product in international trade is classified under an HS code. The first 6 digits are internationally standardized — the same 6 digits for "cotton men's t-shirts" in every country. Countries then extend the code with additional digits for their own tariff schedules. The US uses 10 digits, the EU uses 8, China uses 8.
Getting your HS code right matters because different codes carry very different duty rates. Here are some common e-commerce product categories and their US duty rates:
| Product Category | HS Code (US) | US Duty Rate | Notes |
|---|---|---|---|
| Cotton t-shirts (men's) | 6109.10.0030 | 16.5% | Textiles carry high US rates |
| Stainless steel water bottle | 7323.93.0060 | 3.4% | Metal kitchenware, moderate rate |
| USB cable | 8544.42.0000 | 0% | Electronics often duty-free in US |
| LED desk lamp | 9405.42.8010 | 3.9% | Lighting fixtures, low rate |
| Silicone kitchen mat | 3924.10.0000 | 6.2% | Plastic household articles |
| Wooden cutting board | 4419.00.8020 | 0-2.8% | Wood products, often low or zero |
| Bluetooth speaker | 8518.22.0000 | 0-4.9% | Audio equipment, varies by spec |
A 16.5% duty on cotton t-shirts versus 0% on USB cables means that two products sourced at the same factory cost from China can have wildly different landed costs. You can look up your product's HS code using the HS Code Search tool, then check the applicable rate on the destination country's tariff schedule.
De Minimis Thresholds: The Small Shipment Exemption
De minimis is the value below which a shipment enters a country duty-free and tax-free. It's the reason dropshippers and small-parcel sellers could avoid customs costs for years. Here's the current landscape:
| Country | De Minimis | What It Means for Sellers |
|---|---|---|
| United States | $800 | Shipments valued under $800 enter duty-free. This is why many sellers ship small batches via air freight. |
| Canada | CA$20 (courier) | Very low threshold. Most commercial shipments get taxed. |
| Australia | AUD 1,000 | High threshold, but GST applies to imported low-value goods since 2018. |
| EU | EUR 0 (abolished 2021) | All commercial goods subject to VAT regardless of value. No de minimis exemption. |
| United Kingdom | GBP 0 (post-Brexit) | All commercial goods subject to VAT. GBP 135 threshold for duty only. |
| Japan | JPY 10,000 | Low threshold, but consumption tax applies to all imports above JPY 5,000. |
The US $800 de minimis is exceptionally generous by global standards. It means a seller can ship a batch of 50 units valued at $15 each ($750 total) via DHL or FedEx and clear customs without paying a cent in duty. This is the mechanism that made small-batch air freight viable for Amazon FBA sellers who don't want to deal with ocean freight and full customs clearance.
The EU's elimination of de minimis in 2021 was a game-changer. Before that, any shipment under EUR 22 entered the EU VAT-free. Now every commercial parcel — even a $5 phone case shipped from China — is subject to EU VAT. This is why the EU introduced the IOSS (Import One Stop Shop) scheme for low-value goods under EUR 150.
How to Calculate Landed Cost (With Real Numbers)
Landed cost is the total cost of getting your product from the supplier to your warehouse, including product cost, shipping, insurance, and customs charges. Here's a real calculation for a private label seller importing stainless steel water bottles from China to the US via sea freight:
| Cost Component | Amount | Notes |
|---|---|---|
| Product cost (500 units) | $2,000 ($4/unit) | Factory price ex-works |
| Sea freight + insurance | $500 | Shenzhen to Long Beach |
| US customs entry fee | $125 | Broker fee for entry filing |
| Merchandise processing fee | $28 | 0.3464% of value, min $27.75 |
| Harbor maintenance fee | $25 | 0.125% of value |
| Import duty (3.4%) | $85 | 3.4% x ($2,000 + $500) = $85 |
| Inland freight to FBA | $150 | Trucking from port to Amazon warehouse |
| Total landed cost | $2,913 | $5.83/unit |
That's the number that matters. Not the $4 factory price — the $5.83 landed cost per unit. If you sell at $24.99 and Amazon takes its FBA fees, your profit is calculated against $5.83, not $4. A seller who prices based on factory cost alone will think they have $20.99 of margin to work with; the real number is $19.16.
Use the Customs Duty Calculator to estimate the duty portion of your landed cost before you place a production order. Enter the customs value (product cost + shipping + insurance), pick the destination country, and it applies the correct duty rate based on your HS code category.
DDP vs DDU: Who Pays the Tax Man?
When you ship internationally, the Incoterms (International Commercial Terms) you choose determine who is responsible for paying customs duty and taxes. For e-commerce sellers, two terms matter most:
DDP (Delivered Duty Paid)
The seller (you) is responsible for all costs including customs duty, import VAT, and clearance fees. The buyer receives the package with everything already paid. This is the standard for Amazon FBA shipments — Amazon's designated carriers handle customs and bill you for the charges. DDP is also common for direct-to-consumer stores where you want the customer to see a final price with no surprise charges.
The advantage: customer experience. No one likes getting a card from the post office saying "pay $12 in customs or we won't deliver your package." DDP eliminates that friction. The disadvantage: you eat the customs cost, which means you need to build it into your pricing from the start.
DDU / DAP (Delivered Duty Unpaid / Delivered at Place)
The seller ships the product, but the buyer is responsible for paying customs duty and taxes when the package arrives. This is cheaper for the seller upfront, but creates a terrible customer experience — the buyer gets a surprise bill they weren't expecting, and many will refuse delivery, triggering returns and chargebacks.
For Amazon FBA, you don't get a choice — Amazon requires DDP for inbound shipments to its European fulfillment centers. For your own independent site (Shopify, WooCommerce), the choice is yours, and the trend in 2026 is strongly toward DDP with transparent tax-inclusive pricing.
5 Common Duty Calculation Mistakes
1. Using the Wrong HS Code
HS code classification errors are the #1 cause of duty overpayment and underpayment. A "kitchen timer" could be classified as a clock (low rate) or as a kitchen appliance (different rate) depending on how you describe it. Use the HS Code Search tool to find the correct code, and when in doubt, request a binding ruling from the destination country's customs authority — it's free and gives you legal certainty.
2. Forgetting the Merchandise Processing Fee (US)
In addition to the duty rate, US imports are subject to a Merchandise Processing Fee (MPF) of 0.3464% of the customs value (minimum $27.75, maximum $538.77) and a Harbor Maintenance Fee of 0.125%. These add up — on a $10,000 shipment, that's $34.64 + $12.50 = $47.14 in fees on top of your duty rate.
3. Not Claiming Preferential Tariffs
Many countries have free trade agreements that reduce or eliminate duty on goods from specific partner countries. US imports from countries with US FTAs (Australia, Singapore, South Korea, Mexico/USMCA) often qualify for 0% duty. If your goods originate in a country with a preferential agreement, you need a certificate of origin to claim the reduced rate — without it, you pay the full rate.
4. Underestimating EU Import VAT
EU imports are subject to import VAT at the destination country's standard VAT rate (19-25%) in addition to import duty. This VAT is collected at customs clearance. It's refundable if you're VAT-registered in the EU, but if you're not, it's a real cost. Many sellers forget to account for this and are shocked when their EU freight forwarder sends a bill that's 20%+ higher than expected.
5. Ignoring Anti-dumping Duties
If your product falls in a category that the destination country has determined is being "dumped" (sold below fair market value), an anti-dumping duty is applied on top of the regular duty rate. These can be brutal — anti-dumping duties on Chinese steel products can exceed 250%. Check whether your product category is subject to anti-dumping measures before you commit to sourcing from a specific country.
Estimate Your Customs Duty Now
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Try Free Customs Duty Calculator →FAQ: Customs Duty Questions Sellers Ask Most
Customs duty is a tax on the import of goods, calculated as a percentage of the customs value (product + shipping + insurance). Import VAT is the regular Value Added Tax applied to imported goods at the border, at the same rate as domestic sales. In the EU, you pay both at customs clearance. In the US, there's no federal import VAT — just duty and processing fees.
Start with the HS Code Search tool — enter a product description and it returns candidate codes. Then verify by checking the destination country's tariff schedule, because the last 2-4 digits are country-specific. For products where classification is ambiguous, you can request a binding ruling from US Customs (CBP) or the relevant EU authority — it provides legal certainty and is free.
Yes. The US de minimis threshold of $800 applies to both personal and commercial shipments. If your shipment's customs value is under $800, it enters the US duty-free and tax-free. This is why many Amazon FBA sellers ship small batches via air freight rather than bulk sea freight — staying under $800 saves the entire duty and customs clearance cost.
In some cases, yes. The US offers a drawback program that refunds up to 99% of duties paid on imported goods that are subsequently exported (or destroyed). The EU has a similar mechanism called "outward processing relief." If you import goods to the US and then ship unsold inventory back to your supplier or to another country, you may qualify for a duty drawback claim.
If customs determines you underpaid — typically through an audit or post-entry review — you'll receive a demand for the unpaid amount plus interest. If the underpayment resulted from fraud or negligence, penalties can range from 2x to 4x the duty amount. This is why getting your HS code and customs value right matters. Use a licensed customs broker for high-value shipments.
For shipments valued over $2,500 entering the US, a formal customs entry is required, and most sellers use a licensed customs broker to file it. Broker fees typically range from $100-200 per entry. For air freight shipments under $800 (de minimis), no formal entry is needed — the carrier handles informal clearance. For sea freight, a broker is effectively mandatory regardless of value.
For shipments to Amazon's European fulfillment centers, Amazon requires DDP (Delivered Duty Paid) terms. You or your freight forwarder pays all duties and import VAT at customs clearance, and Amazon receives the goods ready for sale. For US fulfillment centers, you can use your own broker or Amazon's partnered carrier program, which handles customs and bills you for charges.
Final Thoughts
Customs duty is one of those costs that's invisible until it isn't. You can source a great product, negotiate a good factory price, nail your logistics — and then lose 5-15% of your margin to a duty rate you didn't bother to check before you placed the order.
The fix is simple: look up your HS code before sourcing, check the destination country's duty rate, calculate your landed cost, and price accordingly. The Customs Duty Calculator handles the math — you just need to know your product category and your customs value.
Don't be the seller who discovers their 20% margin is actually a 12% margin because they forgot about a 7% duty rate and a 0.3464% merchandise processing fee. It takes 30 seconds to check, and it could save you thousands on your first production order.