Binding Tariff Information (BTI) — lock in your HS code before you import

When one digit of the HS code rewrites the whole invoice

You are about to import a new article — say a technical textile blend, an electronic component, or a dietary supplement. Two tariff headings look plausible: one at 0%, the other at 12%. You declare the 0% code, the container clears, all is well… until a post-clearance audit eighteen months later, when customs reclassifies the goods and demands the unpaid duty, the associated import tax, interest, and a penalty on top.

This is avoidable. The tool that avoids it is a binding advance classification ruling — called Binding Tariff Information (BTI) in the EU, an Advance Tariff Ruling (ATaR) in the UK, a CBP binding ruling in the US, and an Advance Ruling in India. It is a written decision from the customs authority that fixes the classification of a specific product, before you import, and binds customs itself. This guide covers what it is, how to get one, what it costs, how long it lasts, and how the systems differ across the US, UK, and India.

What a binding ruling actually is

A binding classification ruling is an individual administrative decision in which customs confirms, in advance and in writing, the tariff heading (HS code) that applies to a given product. In the EU its legal basis is Article 33 of the Union Customs Code; in the US, binding rulings are issued by CBP under 19 CFR Part 177 and stored in the public CROSS database.

Three features define it:

• Binding: customs must apply the stated classification to every conforming import, and the holder must use it. It is not a casual opinion.
• Territorial: a ruling is valid only in the issuing customs territory — an EU BTI covers all 27 member states; a US ruling covers the US only.
• Product-specific and holder-specific: it describes one clearly identified product and benefits one holder.

A classification ruling is distinct from an advance origin ruling (which fixes origin, not the code) and from an advance valuation ruling (which fixes the customs value). It answers one question only: which HS code?

Advance rulings around the world: comparison table

Every major customs bloc offers some form of advance classification decision, under different names and timelines:

The logic is identical everywhere: it is cheaper for both the state and the importer to settle the classification once, upstream, than to re-argue it at every entry. Lead times are indicative — a well-documented file is often processed faster than the legal maximum.

How to get a CBP binding ruling in the US

US importers file electronically through CBP's eRulings portal. The process is notably fast for classification questions:

1. Describe the product precisely: composition, function, manufacturing process, intended use, and a clear commercial description. Attach spec sheets and photos.
2. Propose a classification with reasoning (General Rules of Interpretation, section/chapter notes, prior CROSS rulings on similar goods).
3. CBP reviews: a National Commodity Specialist issues an NY ruling, typically within about 30 days for straightforward classification requests; complex cases escalate to a Headquarters (HQ) ruling and take longer.
4. Use and cite: reference the ruling number on your entries; the ruling is published in CROSS and is binding at all US ports.

A practical tip: search CROSS first. If CBP has already ruled on a near-identical product, you can rely on that precedent for classification consistency, or shape your own request to distinguish or align with it.

Duration, scope and early expiry

A US ruling stays in force until CBP modifies or revokes it — there is no automatic 3-year clock as in the EU and UK. But any ruling, in any territory, lapses early if the tariff basis changes:

• An HS amendment — the World Customs Organization revises the Harmonized System roughly every 5-6 years (last major update 2022).
• A court decision or a formal revocation notice (in the US, published in the Customs Bulletin with a comment period).
• Annulment if the ruling rested on inaccurate or incomplete information.

When a ruling is revoked for a genuine change of rule (not fraud), authorities usually grant a short transition window so good-faith holders can honor firm contracts already in place.

Two worked examples

Example 1: textile blend imported into the US

Across 10 shipments a year, the ruling not only locks in $20,000 of savings but removes the risk of a retroactive reclassification and penalty on prior entries.

Example 2: dual-classifiable electronic module from India to the US

Beyond the dollars, a stable classification prevents entry holds and speeds up the supply chain — especially valuable for a fast-moving component with recurring shipments.

Conclusion: legal certainty at (usually) zero cost

A binding ruling turns a costly uncertainty — "did I classify this correctly?" — into an enforceable answer, free of charge in the US, EU and UK. It is not warranted for every SKU, but the moment a product is ambiguous, high-volume, or sits on the border between two headings, requesting one is the mark of a disciplined importer. The golden rule: apply before the first entry, never after a dispute.

To go further, see our guide on classifying a product you have never imported (a strong ruling starts with sound classification), our breakdown of the 6 customs valuation methods (the other pillar of duty calculation), and our post on importing into the post-Brexit UK, where a separate ATaR is required.