How Do I Handle International Shipping, Duties, and Customs Compliance for My Merchant Business?

When companies ignore customs compliance because they assume customs regulations only affect logistics companies or traditional importers, it can lead to shipping delays, unexpected costs, or worse, audits that can grind global operations to a halt.

Even for companies aware that they need to manage customs compliance, diving into international shipping for the first time can feel overwhelming, as ecommerce businesses must quickly learn how to handle duties and navigate complex regulations. Other challenges include specific governmental regulations forshipping Hazmat products with health and safety hazards, environmental rules, and even security concerns. As a result, getting prepared for and managing international shipping, requires an intentional effort by businesses or a third party logistics shipping partner who can handle the process on their behalf.

With trade policies shifting so frequently, increasing scrutiny from customs authorities in countries around the world, and high global demand for a wide range of products, getting customs compliance right has never been more important. It could be argued that customs compliance has become essential knowledge for all modern businesses, not just the ones shipping goods cross-border.

What Is Customs Compliance?

Customs compliance refers to adherence to laws and regulations that govern the import and export of goods across international borders. Three foundational elements of customs compliance determine how your goods are treated at borders around the world:

1. Classification (Harmonized System Codes)

To standardize global trade, every product shipped internationally must be assigned the correct commodity code using the Harmonized System (HS) or the Harmonized Tariff Schedule (HTS), which determines duty rates, taxes, restrictions, and eligibility for trade agreement benefits.

Misclassification is a major compliance issue. Using the wrong code can lead to overpaying duties or costly penalties. With customs authorities getting better at spotting classification errors, accurate product classification is essential.

2. Origin (Rules of Origin)

Origin rules determine a product’s true country of origin based on where it was manufactured or “substantially transformed,” not simply where it was shipped from. This matters because origin impacts tariffs, import quotas, and eligibility for trade benefits like those under the US-Mexico-Canada Agreement (USMCA).

Proving origin often requires certificate of origin documentation, and the rules can get complicated when products include components from multiple countries. Getting it right can mean the difference between paying full tariffs and securing preferential rates under trade agreements.

3. Valuation

The declared value of your goods determines customs duties and import Value Added Tax (VAT) calculations. The sum must accurately reflect the full transaction value, including freight, insurance, and related costs associated with transporting the goods to their destination.

Precision is critical. Undervaluing goods can lead to serious penalties, while overvaluing leads to overpayment and may still prompt a customs review.

Any business shipping physical goods globally, including SaaS companies sending servers, ecommerce brands fulfilling D2C international orders, or manufacturers distributing parts or products worldwide, needs to have an understanding of how classification, valuation, and origin rules impact duties and compliance requirements for their goods.

Proper customs compliance means that business goods will be correctly classified, valued, and declared to customs authorities, which helps businesses avoid fines, shipping delays, or even product seizure.

Managing the Customs Clearance Process

The work involved in successfully clearing customs starts well before goods reach the border. Here are the seven steps involved in managing the customs clearance process:

1. Classify Goods and Determine Regulations

Verify if your items are restricted or need special import or export licenses. Those that fall into these categories may require specific documentation, so it’s a good idea to complete this paperwork before they are in transit to avoid delays or extra fees.

2. Gather Required Customs Documentation

Gather all required paperwork, including any licenses, permits, or certificates of origin as well as commercial invoices and packing lists. Discrepancies in documentation is a common cause of customs delays, so it’s a good idea to double check that your paperwork matches.

3. Submit Documents

At this stage, your importer of record or customs broker will file all data and forms electronically with the relevant customs authority. If you are partnered with a full-service 3PL, they will coordinate with your importer of record and customs broker to file the necessary forms and data.

4. Calculate Duties, Taxes, and Fees

Calculate any relevant duties, taxes, and fees, based on declared value, classification (HS/HTS codes), country of origin, and applicable import regulations of the destination country.

5. Pay Duties, Taxes, and Fees

Pay all relevant duties, taxes, and fees. Note that some countries require advance duty payment before goods can be released.

6. Customs Clearance and Release

At this stage, customs authorities may review paperwork or conduct physical inspections of goods. The work you did to classify and value products accurately will reduce – but not eliminate - your risk of products being held.

7. Maintain Records & Conduct Internal Audits

Keep all import and export records for the required period (usually five years in the U.S.), perform annual internal audits, and regularly review HS/HTS codes, since classifications that were correct last year may need updating as regulations change.

Staying Compliant Is Necessary for Growth

In summary, customs compliance is vital for both avoiding penalties and shipping delays as well as establishing predictable costs and global growth. Companies that master compliance gain a clear competitive advantage by accessing faster clearance times, lower total costs, and the ability to scale internationally without compliance bottlenecks.

With trade policies continuing to evolve and customs authorities increasing scrutiny, companies should view customs compliance as a strategic advantage rather than just an obligation.

How G10 Fulfillment Supports International Sellers

G10 Fulfillment’s warehouse team helps customers who make international shipments in a variety of ways:

1. International Shipping Expertise

G10 Fulfillment helps coordinate and manage the logistics involved in international shipping by leveraging relationships with global carriers.

2. Hazmat Fulfillment

G10 handles the storage, handling, and shipping of fully regulated Hazmat/dangerous goods for ecommerce, B2B, and B2C. Our team stays up to date on all Hazmat regulations to protect businesses from fines and penalties.

3. Customs Documentation

International shipments require accurate paperwork, such as:

• Commercial invoices
• Packing lists
• Certificates of origin

G10 prepares and manages these documents so international shipments aren’t delayed at customs.

4. Duties and Taxes

G10 helps manage import duties, taxes, and fees that vary by country by:

• Calculating estimated duties and taxes before shipment
• Prepaying customs fees to prevent delivery delays
• Providing clarity to customers on the total landed cost of their orders

5. Compliance with Regulations

Countries have varying regulations on restricted or prohibited goods. G10 ensures shipments meet local import/export laws and compliance standards to reduce the risk of fines, returns, or confiscation of goods.

6. Tracking and Transparency

G10 provides sellers with real-time tracking updates, including customs status, so both the seller and the buyer know exactly where the shipment is and if there are any delays.

7. Returns Management

If an international order needs to be returned, G10 can help handle international reverse logistics, including shipping back, customs clearance, and restocking.

G10 simplifies global ecommerce for our customers. If you’re ready to expand to international markets, contact us today to request a quote for quality logistics support.