For someone new to importing into the UK, customs clearance can look more complicated than it really is. There are declarations to submit, commodity codes to check, duties and VAT to consider, documents to prepare, and occasionally a customs officer who wants to take a closer look at the shipment.
The good news is that the process follows a fairly clear path.
Once you understand what happens at each stage, customs clearance becomes much easier to manage, and more importantly, you can spot potential problems before they hold up your shipment. So, what actually happens after your goods arrive in the UK? Let's walk through it.
What Is Customs Clearance?
Before goods can be released into free circulation in the UK, they need to be declared to customs.
A customs declaration provides HMRC with the information it needs to establish:
What the goods are
How much they are worth
Where they were manufactured
Which commodity code applies
Who is importing them
What customs procedure is being used
How much duty and VAT is due
The declaration is normally submitted electronically through the UK's Customs Declaration Service (CDS). Once submitted, HMRC assesses the declaration and determines what happens next. And this is where the real customs journey begins.
Step 1: Submit Your Customs Declaration
The first major step is preparing and submitting the import declaration. A customs agent or importer will normally need information from documents such as the:
Commercial Invoice
Packing List
Bill of Lading or Air Waybill
EORI details
Commodity code
Country of origin
Customs value
Freight and other relevant charges
Incoterms
The information across these documents must match. For example, if the invoice states that there are 500 units but the packing list shows 450, this discrepancy could raise questions during a later review. To avoid such issues, review our guide, Common Mistakes Importers Make in Customs Declarations.
Commodity classification matters
One of the most important parts of the declaration is the commodity code. It determines much more than the duty rate. It can also identify whether the goods are subject to licenses, restrictions, additional controls or other requirements.
Getting the commodity code right before the goods leave the exporting country is therefore much better than trying to fix it after the shipment has arrived.
What happens after submission?
Once the declaration is submitted and accepted, a customs reference such as an MRN is generated. The declaration then goes through HMRC's risk and control processes. This doesn't necessarily mean your goods will be inspected. In many cases, everything moves forward without a physical examination.
Step 2: Pay Import Duty and VAT
Once the declaration has been processed, the applicable customs charges need to be accounted for. The two figures importers most commonly look at are:
Import Duty
Customs duty depends on factors including:
Commodity code
Customs value
Country of origin
Any applicable tariff preference
For example, two products with similar prices can have completely different duty rates if they fall under different commodity codes.
Import VAT
Import VAT is generally calculated using the relevant customs value plus applicable duty and certain other costs. For VAT-registered businesses, Postponed VAT Accounting (PVA) can often be used. With PVA, import VAT isn't paid at the border in the usual way. Instead, the importer accounts for it on their VAT return.
This distinction is important because the amount shown on the customs declaration isn't necessarily the amount that needs to be physically paid before the goods can be released.
Don't forget about customs valuation
A common mistake is assuming that customs duty is simply a percentage of the invoice value. It isn't always that straightforward. Freight, insurance and other costs can affect the customs value depending on the circumstances and the valuation method being used.
Step 3: Document Verification
After the declaration has been submitted, customs may decide that additional information or documentation is required. This is where a shipment can suddenly stop moving.
You may receive a request for things such as:
Commercial invoice
Packing list
Product specifications
Certificates
Proof of origin
Import licenses
Product compliance documents
Evidence supporting the declared value
Information about the intended use of the goods
Sometimes the issue is not that anything is wrong with the shipment. The customs authority may simply need more information before it can make a decision.
Why do document checks cause delays?
Usually, it's because the information available to customs isn't sufficient to verify something.
For example:
Invoice: "Plastic goods" That's not particularly helpful if customs need to establish exactly what the product is, what it is made from and how it should be classified. A better description might identify the actual product, material, function and intended use.
Good customs descriptions are specific.
The person reviewing the declaration should be able to understand what is being imported without having to play detective.
Step 4: Physical Inspection: When Does It Happen and Why?
This is the part importers usually worry about most. A shipment can be selected for examination for a number of reasons. It could be:
Random selection
Customs risk profiling
Incorrect or unusual declaration data
Commodity-related concerns
Valuation concerns
Origin verification
Intelligence or enforcement activity
A requirement from another government department
Being selected for inspection does not automatically mean you've done something wrong. Customs controls are designed around risk. Some shipments pass straight through. Others are selected for documentary or physical examination.
What happens during a physical inspection?
Depending on the circumstances, customs may:
Open cartons
Inspect packaging
Examine specific products
Check quantities
Compare goods against the declaration
Take photographs
Take samples
Verify marks or labels
The shipment may remain on hold until the examination has been completed and any outstanding requirements have been satisfied. And this is where delays can become expensive. A container sitting at a port can generate storage, demurrage or detention charges while everyone waits for the next step.
Don't Forget Other Government Departments
Customs isn't always the only authority involved. Depending on what you're importing, other government departments may need to review the goods.
Examples can include controls involving:
Trading Standards
Port Health
Border Force
DEFRA
Food-related authorities
Product safety authorities
This is particularly relevant for goods such as food, cosmetics, toys, electrical products, chemicals, animal products and certain controlled items.
A customs declaration can therefore be technically correct while the shipment is still held because another authority needs to complete its checks.
Step 5: Goods Released for Delivery
Once the customs declaration has been cleared and any required checks have been completed, the shipment can move towards release. But there's an important distinction here:
Customs clearance doesn't always mean the goods are physically ready for collection immediately.
The port, airport or warehouse may still need to complete its own release procedures. Depending on the shipment, there may be:
Terminal charges
Handling charges
Storage charges
Release instructions
Delivery bookings
Warehouse requirements
Once everything is in place, the goods can be collected and delivered to the importer.
For shipments moving to a customs warehouse under transit, the process can be slightly different because the goods may move under a transit procedure rather than being released directly into free circulation.
How Long Does UK Customs Clearance Take?
This is one of the most common questions, and unfortunately there isn't one universal answer. A straightforward shipment with correct documentation can move through customs relatively quickly. But a shipment requiring additional checks can take considerably longer.
A rough way of looking at it is:
Type of clearance | Typical situation |
|---|---|
Straightforward declaration | Often processed quickly |
Documentary check | May take longer depending on the query |
Physical examination | Depends on inspection availability |
Other government department hold | Depends on the relevant authority |
Complex or unresolved issue | Can take significantly longer |
The biggest factor isn't necessarily the declaration itself. It's whether something causes the shipment to stop moving. A clean declaration with complete documents can progress smoothly. A small unresolved issue can turn into several days of delay.
How to Avoid the Most Common Customs Delays
The best way to deal with customs delays is to prevent them in the first place. Here are some of the areas worth checking before your shipment arrives.
1. Check the Commodity Code
Don't guess the commodity code based purely on the product name.
Consider the products:
Material
Function
Composition
Intended use
Construction
If you're unsure, get the classification checked before importing.
2. Use Accurate Product Descriptions
"General goods", "plastic items" or "accessories" don't give customs much to work with. Give a clear description of what the goods actually are. A good description can make the declaration easier to understand and defend.
3. Make Sure the Documents Agree
Check the:
Invoice → Packing List → Bill of Lading/AWB → Customs Declaration
The quantities, weights, values and descriptions should make sense across the documents. Small inconsistencies are surprisingly good at creating big headaches.
4. Check Import Restrictions Before Shipping
Some products require additional approvals, licenses, certificates or compliance documents. Don't wait until the shipment reaches the UK to discover that a document was needed. Research the requirements before the goods leave the supplier.
5. Get the Customs Value Right
Make sure the value declared to customs is supported by the commercial documents and that relevant transport and insurance costs have been considered correctly.
Artificially lowering the value to reduce duty can create much bigger problems than the original duty bill.
6. Prepare Compliance Documents Early
If you're importing regulated products, have the relevant paperwork ready before arrival. This could include product test reports, safety documentation, certificates, licenses or evidence of compliance. Waiting for a government department to request documents after the shipment has already arrived can add unnecessary days to the process.
A Simple Example
Imagine a UK company imports 500 electric kettles from China. Before arrival, the customs agent checks:
Commodity code
Country of origin
Customs value
Commercial invoice
Packing list
Bill of Lading
Product information
Applicable import controls
The declaration is submitted through CDS. HMRC accepts the declaration and calculates the applicable duty and VAT. If there are no further controls, the shipment can proceed towards release. But imagine the shipment is selected for a document check. HMRC requests additional product information. The importer provides it the same day. The declaration is then cleared. Now compare that with an importer who doesn't have the requested documents ready. The shipment may remain at the port while the importer searches for paperwork, and storage charges can start building up.
The difference isn't always customs itself. Sometimes it's simply preparation.
The Customs Clearance Process in One Picture
You can think of the process as a five-stage journey:
Documents prepared
↓
Customs declaration submitted
↓
Duty & VAT accounted for
↓
Customs / government checks
↓
Goods released
↓
Collection & delivery
Most shipments follow this path without drama. The problems usually appear when something is missing, inconsistent or requires additional investigation.
Final Thoughts
UK customs clearance doesn't have to be mysterious. At its core, customs want to establish three things:
What are the goods?
How much are they worth?
Are they legally allowed to enter under the declared procedure?
If your documentation answers those questions clearly and accurately, you're already removing many of the common causes of delay. And when a shipment is selected for a customs check, don't panic. A hold doesn't automatically mean something is wrong. It simply means the relevant authority needs to complete another part of the process.
The key is to respond quickly, provide accurate information, and keep everyone involved updated. Because in customs, a well-prepared shipment doesn't just clear more smoothly. It gives you a much better chance of knowing what is happening when something doesn't go according to plan.
