# First time importer customs checklist US: the complete first-order walkthrough
Your first import lives or dies on paperwork you handle before the goods exist. Most first-time customs problems, a shipment held at the port, a surprise duty bill, a fine for a filing nobody told you about, trace back to steps the importer skipped while the factory was still producing. Every one of those skipped steps sits on the first time importer customs checklist US buyers should have worked through before ordering. This first time importer customs checklist US edition walks through every step in order, from setting yourself up as an importer to keeping records after the goods arrive.
Read it before you place the order, not after. The first time importer customs checklist US rewards early action and punishes late discovery. Almost everything on this list is cheaper and easier to do early.
Set yourself up as the importer of record
US Customs needs to know who is legally responsible for the shipment. That party is the importer of record, and on your first order, it is you or your company.
The practical step is getting an Employer Identification Number (EIN) from the IRS if you are importing as a business. Individuals can import with a Social Security number, but a business should operate under its EIN. Your customs broker uses this number to file entries under your name. The EIN is item one on the first time importer customs checklist US for a reason: without it, nothing moves.
Being the importer of record also means owning compliance. If the product needs FCC certification, CPSIA testing for children's products, or FDA clearance for food-contact goods, that obligation sits with you, not the factory. This is the step of the first time importer customs checklist US importers most often skip, and the one that hurts most when skipped. Confirm what your product category requires before you order, because retrofitting compliance onto goods already on the water is expensive or impossible.
One decision to make now, and a core entry on the first time importer customs checklist US: whether you will work with a licensed customs broker. For a first import, the answer should be yes. A broker files the entry, pays duties on your behalf, and keeps you out of the procedural traps below. Interview one before you need one.
Confirm the HS classification before you order
Every product entering the US gets a Harmonized System (HS) code, and the code determines the duty rate. Get this wrong and you either overpay for years or underpay and face penalties.
Get the HS code wrong and the duty math collapses; that is why the first time importer customs checklist US puts classification before ordering. Send the broker the product specs, photos, and materials breakdown, and get the HS code in writing. The supplier's proforma invoice should carry that HS code, and it should match what the broker files. A mismatch between the invoice and the entry is the kind of discrepancy that gets a shipment flagged.
Trade policy moves, so the first time importer customs checklist US is not a one-time read. Check the current official sources for the duty rate on your HS code at the time of ordering, and build the landed cost on the current rate plus a buffer. Never price a product on a duty rate someone quoted you last year.
Choose your Incoterms deliberately
Incoterms decide who handles what between the factory gate and your warehouse: who books the freight, who buys the insurance, who clears export, who bears the risk at each handoff.
First-time importers usually see two options, EXW and FOB, and choosing between them is where the first time importer customs checklist US turns to logistics. EXW (Ex Works) means you handle everything from the factory door. FOB (Free On Board) means the supplier gets the goods onto the vessel and you take it from there. FOB is the common starting point because the supplier handles export clearance in China, which is the part first-timers are least equipped to manage.
Whatever you choose, normalize it across quotes. Comparing a supplier's EXW price against another's FOB price is meaningless until you add the missing freight leg to the EXW quote. The cheapest quote often excludes what the others include, and Incoterms are the most common place that happens.
Write the Incoterms on the proforma invoice and reference them in your purchase order, because the first time importer customs checklist US assumes nothing verbal survives. If the terms are not written down, they will be reinterpreted later, usually not in your favor.
File the ISF on time: the 24-hour rule
The Importer Security Filing, the item on the first time importer customs checklist US with the hardest deadline, is the filing US Customs requires before the goods sail. Usually called ISF or "10+2," the headline rule is simple: it must be filed at least 24 hours before the vessel loads at the foreign port.
Miss the ISF deadline and the penalties are real, assessed per violation, and entirely avoidable. Your forwarder or broker usually files the ISF for you, but they can only file what you give them. That means getting the supplier's final packing details, the manufacturer information, and the container stuffing location to your filer with time to spare.
Build the ISF into your timeline and tell the supplier the ISF deadline when you confirm the ship date, not after. The first time importer customs checklist US treats supplier communication as part of compliance: a supplier who sends the final packing list the day the container loads has already made the ISF late. A supplier who sends the final packing list the day the container loads has already made the ISF late, and the ISF deadline is the least flexible date on the first time importer customs checklist US timeline.
Make the invoice and packing list match reality
Customs compares your documents against each other and against the goods, which is why the first time importer customs checklist US spends a whole section on the invoice and packing list. They are the two documents everything hangs on, and they must match.
The invoice states what the goods are worth, the quantities, the HS codes, the Incoterms, and the buyer and seller. The packing list states how the goods are packed: cartons, weights, dimensions, marks. When the invoice says 500 units and the packing list describes 480, or the weights do not line up, the entry gets questioned.
Get both documents from the supplier before the goods ship and read them, because the first time importer customs checklist US has one mantra: fix errors while the supplier can still reissue the documents. Check the quantities against your purchase order. Check the values against what you actually paid. Check that the product descriptions are specific, not vague category names. Fix errors while the supplier can still reissue the documents, because reissuing after arrival means delays.
Declare the actual value
This one deserves its own section because the temptation runs the other way. Some suppliers offer to declare a lower value on the commercial invoice to reduce duties. Do not accept.
US Customs requires the transaction value: what you actually paid, and the first time importer customs checklist US is blunt about it. Undervaluation is fraud, and the penalties dwarf whatever duty you might have saved. It also corrupts your own records. Your landed cost math, your insurance coverage, and your duty drawback claims all depend on the real number.
If a supplier suggests a second invoice with a lower value, treat it as a red flag about the supplier, not a favor. Legitimate suppliers declare the real value without being asked twice.
Budget the full landed cost, not just the product price
First-timers consistently underestimate what the goods actually cost to land. The unit price from the factory is the beginning, not the total.
The landed cost formula is straightforward, and running it early is what the first time importer customs checklist US demands. Add the product cost, international freight, insurance, duties, the Merchandise Processing Fee (MPF), the Harbor Maintenance Fee (HMF) for ocean shipments, broker fees, and inland delivery, then divide by the number of sellable units. That per-unit number is your real cost, and it is the number your pricing should be built on.
Two line items surprise first-timers most. Broker and forwarder fees are fixed costs that hit small shipments hardest, which is why tiny first orders often land at shocking per-unit costs. MPF and HMF are government fees calculated on the shipment value and the mode of transport; your broker includes them in the entry, but you should know they exist before the invoice arrives.
Get quotes for every leg before you commit to the order size. The first time importer customs checklist US treats freight economics as a go/no-go input: a product with a great factory price and terrible freight economics is not a great product. The landed cost per unit, not the factory unit price, is the real decision variable.
Plan for the port: what happens when the goods arrive
When the vessel arrives, your broker files the customs entry, US Customs reviews it, and the goods are released or held for examination. The first time importer customs checklist US does not end at the port: most shipments clear without drama when the paperwork is right.
Examinations happen, and the first time importer customs checklist US frames them as routine, not trouble. Customs selects shipments for document review, X-ray, or physical inspection on criteria you cannot control. If your shipment is examined, you pay the examination fees and wait. Accurate paperwork keeps examinations short; discrepancies make them long.
Have your broker's contact details and your entry documents accessible during the arrival window. If customs asks a question, the speed of your answer affects the speed of your release.
Keep records for five years
US Customs requires importers to keep import records for five years from the date of entry, and the first time importer customs checklist US ends where it begins, with paperwork. This is not optional, and it is not something to reconstruct later.
Keep the commercial invoice, packing list, bill of lading, customs entry documents, proof of payment to the supplier, and any correspondence about valuation or classification. Store them where you can find them: a shared drive folder per shipment, named consistently. If customs audits the entry two years from now, the importers who produce clean records quickly have short audits. The ones who cannot find the invoice do not.
The mistakes first-time importers keep making
The same errors show up on first orders again and again. Every one of them is a first time importer customs checklist US item ignored:
Ordering before confirming the HS code. The duty rate turns out to be double the estimate, and the margin is gone before the goods ship. Classify first, order second.
No broker until the goods are on the water. Then the ISF is late, the entry is rushed, and every question costs a day. Engage the broker when you place the order.
Vague product descriptions on the invoice. "Gift items" or "plastic products" instead of specific descriptions invites examination. Make the supplier describe the goods precisely.
Ignoring the holiday calendar. Ordering in December for a February delivery runs straight into Chinese New Year, when factories shut for about three weeks. Production scheduled across the shutdown slips by a month.
Paying the balance before inspection. The pre-shipment inspection is your last leverage. Once the full amount is paid and the goods have shipped, quality problems become your problems. Tie the balance to a passed inspection.
Mismatched documents. The invoice, packing list, and purchase order disagree on quantities or values, and customs notices. Reconcile the three before the forwarder files.
Each of these is preventable with the first time importer customs checklist US above and a habit of reading documents before they are filed rather than after.
Where a China-side partner fits
Most of the first time importer customs checklist US is US-side work: your broker, your filings, your records. But the documents customs reads are produced in China, by your supplier. The invoice, the packing list, the carton markings, the timing of the packing details for the ISF: all of it depends on a supplier who sends accurate paperwork on time.
That is the part first-timers struggle to control from a distance. A partner on the ground who checks the documents against the purchase order, confirms the packing details before the ISF deadline, and verifies the goods at pre-shipment inspection closes the gap between the two sides of this checklist. Shenzhen-based Sourcing Ally provides that China-side coverage, with QC at the sample, production, and final stages, for importers running their first orders through this process.
Conclusion: the first time importer customs checklist US importers should print
The first time importer customs checklist US version comes down to sequence: set up as the importer of record, confirm the HS code with your broker before ordering, choose Incoterms deliberately, hit the ISF 24-hour deadline, make the invoice and packing list match, declare the actual value, budget the full landed cost, and keep every record for five years. Do these in order and the first shipment clears like a tenth shipment. That sequence is the entire first time importer customs checklist US in one paragraph: order of operations, not heroics. Skip them and you will learn each lesson at port prices.
FAQ: first time importer customs checklist US
The first time importer customs checklist US questions below come up on nearly every first order.
### Do I need a customs broker for my first import?
You are not legally required to have one in every case, but for a first import the answer is effectively yes. A broker files the entry, handles the ISF timing, pays duties on your behalf, and keeps the procedural steps in order. Broker timing is the most repeated advice on the first time importer customs checklist US for a reason: engage one when you place the order, not when the goods sail.
### What is the ISF 24-hour rule?
The Importer Security Filing must be submitted at least 24 hours before the vessel loads at the foreign port. Your forwarder or broker usually files it, but they need the supplier's final packing and manufacturer details in time. Late ISF filings draw penalties, so build the deadline into your supplier timeline.
### How do I find the right HS code for my product?
Send your broker the product specs, photos, and materials breakdown before you order, and get the classification in writing. The supplier's proforma invoice should carry the same HS code. Check current official sources for the duty rate on that code at the time of ordering.
### What are MPF and HMF?
The Merchandise Processing Fee and the Harbor Maintenance Fee are US government fees on imports. MPF applies to formal entries and HMF to ocean shipments. Your broker includes them in the entry and the landed cost. Know they exist before the invoice arrives so the total does not surprise you.
### How long must I keep import records?
Five years from the date of entry. That retention rule is the final line of the first time importer customs checklist US: keep the commercial invoice, packing list, bill of lading, customs entry documents, proof of payment, and related correspondence in a consistent per-shipment folder.
### Can I import without an EIN?
Businesses should import under an EIN, which your broker uses to file entries. Individuals can sometimes import under a Social Security number, but a business operating without an EIN creates problems at every step. Get the EIN before you order.