Do you need a customs broker?

Not every movement of goods needs professional help — but most commercial shipments and many personal moves between the UK and the EU do. Go through the checklist below.

A simplified path, not a legal test. Regulated goods, transit through the EU and household removals have extra rules; see the checklist below.

You're a business importing or exporting goods between the UK and the EU (or any non-UK country). You'll almost always need an EORI number and a customs declaration — gov.uk explicitly recommends appointing an agent if you don't want to submit declarations yourself.
You're moving goods through the EU in transit (e.g. a UK-registered vehicle driving through France to Poland). You may need a T1 transit document, which most private hauliers arrange through a broker.
You're using a groupage or vehicle-carrying service crossing UK–EU borders. Your goods will usually need a GVMS booking and matching customs paperwork — the haulier or a broker normally sorts this, but it's worth confirming who is responsible before you ship.
You're relocating your household belongings (personal effects / "mienie przesiedleńcze") between the UK and the EU. This has its own simplified customs procedure with conditions attached — most people use a specialist rather than filing it themselves.
You don't have your own CDS/customs software or badge access. Declarations are filed through HMRC's Customs Declaration Service; without the right software and registration, you can't file one yourself even if you wanted to.
You want one point of accountability if something goes wrong at the border — a broker who does this daily is far less likely to make a documentation error that causes a hold-up.

If none of the above applies — for example, you're sending a low-value personal parcel through a courier that already includes customs handling in its service — you may not need a separate broker. Check the terms of your courier or check gov.uk's guidance on goods sent from abroad first.

What happens if you get it wrong?

Under gov.uk guidance, the importer or exporter remains responsible for the accuracy of their customs declarations even when someone else files them on their behalf. Missing or incorrect paperwork typically means goods are held at the border, additional charges, or in some cases penalties — which is the main reason most people choose a broker over doing it themselves for anything beyond the simplest shipment.

Source: gov.uk — Appoint someone to deal with customs on your behalf.

Next step

See what a broker typically costs, or jump straight to comparing a few UK providers, including Easy Clearance, who handle UK–Poland customs and removals.