Customs Act Basics Every Importer Should Understand

Every consignment that enters India passes through one legal gateway: the Customs Act, 1962. It decides how your goods are classified, valued, assessed, taxed, and cleared — and what happens if something is wrong. For an importer, understanding its basics is the difference between smooth clearance and cargo stuck at the port while demurrage mounts. This guide walks through the essentials of the Act as it stands in 2026, including the important 2025 amendments that changed how assessments are finalised.

What Is the Customs Act, 1962?

The Customs Act, 1962 is the principal legislation governing the import and export of goods across India's borders. It came into force on 13 December 1962 (Act No. 52 of 1962) and is administered by the Central Board of Indirect Taxes and Customs (CBIC) under the Ministry of Finance.

The Act does two jobs at once: it raises revenue through customs duties, and it acts as a control mechanism — regulating what may enter or leave, protecting domestic industry, and enforcing prohibitions and restrictions. It works hand in hand with the Customs Tariff Act, 1975, which sets the actual rates of duty, while the Customs Act, 1962 provides the procedural and enforcement framework.

In 2026, the day-to-day reality of the Act is heavily digital: faceless assessment, electronic filing through ICEGATE, and data-driven risk management have made documentation accuracy and procedural discipline more important than ever.

Key Concepts an Importer Must Know

A few defined terms recur throughout the Act and shape every transaction:

• Importer — under the Act, this includes any owner, beneficial owner, or any person holding himself out as the importer between the time of import and clearance for home consumption.
• Dutiable goods — goods chargeable to duty and on which duty has not been paid.
• Prohibited goods — goods whose import or export is barred under the Act or any other law, subject to conditions.
• Proper officer — the customs officer assigned the relevant function, who assesses and clears goods.
• Bill of entry — the core import declaration (more below).

The Bill of Entry: The Importer's Core Document

The single most important document for an importer is the Bill of Entry, filed under Section 46 of the Act. It is the formal declaration of imported goods — their description, classification under the ITC (HS), quantity, and value — presented to customs for assessment and clearance.

There are two principal routes:

• Bill of Entry for home consumption — where goods are cleared for immediate use in India on payment of applicable duty.
• Bill of Entry for warehousing (into-bond) — where goods are deposited in a bonded warehouse and duty is deferred; an ex-bond bill of entry under Section 68 is filed later to clear them for home consumption, deferring the duty until that point.

Under India's self-assessment regime, the importer assesses duty on the declared particulars, and customs verifies, with risk-based checks determining whether goods go through facilitated clearance or physical examination.

How Goods Are Valued and Assessed

Duty is generally levied on the transaction value of the goods. Section 14 governs valuation for assessment — for goods charged on an ad valorem basis, the value is the price actually paid or payable for the goods when sold for export to India, adjusted per the customs valuation rules (adding costs like freight and insurance to arrive at the assessable, CIF-based value).

The rate of duty and tariff valuation are determined as on the date the bill of entry is presented under Section 46, a point that matters when rates change between shipment and filing.

The main levies an importer encounters include Basic Customs Duty (BCD) under the Customs Tariff Act, the Integrated GST (IGST) on imports, applicable cesses and surcharges (such as the Agriculture Infrastructure and Development Cess and Social Welfare Surcharge), and, where relevant, anti-dumping or safeguard duties.

Clearance of Goods

Clearance for home consumption is governed by Section 47: once the proper officer is satisfied that the goods are not prohibited and the importer has paid the assessed duty and any charges, an order permitting clearance is made. In practice, importers meet three broad channels — a facilitated/green route with self-assessment and no examination, and first-check or second-check routes involving physical examination before or after assessment.

Provisional Assessment — and the 2025 Reform

Sometimes goods must be cleared before assessment can be finalised — because test results, documents, or valuation enquiries are pending. Section 18 allows provisional assessment in these cases, with the importer executing a bond and the assessment finalised later.

Historically this was an open-ended process; provisional assessments could remain unfinalised for years. The Finance Act, 2025 changed that by inserting Section 18(1B), which sets a firm time limit: provisional assessments must be finalised within two years, extendable by a further one year by the Principal Commissioner or Commissioner for recorded sufficient cause. CBIC followed up with the Customs (Finalisation of Provisional Assessment) Regulations, 2025, which operationalise the timelines and closure procedure. For importers, this brings long-awaited certainty about when a provisional assessment must end.

Voluntary Revision After Clearance — New Section 18A

The Finance Act, 2025 also introduced Section 18A, a genuinely importer-friendly change. It allows an importer or exporter to voluntarily revise an entry already made in a bill of entry after the goods have been cleared, re-assessing the duty — paying any short-paid amount with interest, or claiming a refund of excess duty. This offers a simpler self-correction route than the older mechanisms of amendment under Section 149 or modification through appeal, and reflects the broader shift toward voluntary compliance.

Duty Drawback on Re-Export

Where imported goods are later re-exported, Section 74 provides for duty drawback — a refund of a portion of the import duty paid. The goods must have been imported with duty paid, be identifiable as the same goods, and be entered for export within two years of duty payment (extendable to three years by the Commissioner for sufficient cause). This prevents double taxation on legitimate temporary imports.

Penalties and Enforcement

The Act carries real teeth. Goods that are mis-declared, undervalued, or imported in breach of prohibitions can be subject to confiscation and to penalties under provisions such as Sections 111 and 112. Accurate classification, honest valuation, and correct documentation are therefore not just good practice — they are the importer's protection against detention, fines, and seizure. With faceless assessment and data analytics now central to enforcement, discrepancies are easier for the department to detect.

Frequently Asked Questions

Which law governs imports into India? The Customs Act, 1962, administered by CBIC, read with the Customs Tariff Act, 1975, which sets duty rates.

What is a bill of entry? The importer's core customs declaration, filed under Section 46, describing and valuing imported goods for assessment and clearance.

How is customs duty calculated? On the assessable value determined under Section 14 (transaction value adjusted per the valuation rules), at the rate in force on the date the bill of entry is presented.

What changed in 2025? A two-year time limit for finalising provisional assessments (Section 18(1B)) and a new voluntary post-clearance revision mechanism (Section 18A), plus CBIC's Customs (Finalisation of Provisional Assessment) Regulations, 2025.

Conclusion

The Customs Act, 1962 is the backbone of every import into India — governing the bill of entry, valuation, assessment, duty, clearance, and enforcement. For importers, the fundamentals are stable, but the 2025 amendments meaningfully improved the process: finite timelines for provisional assessments and a clean route to self-correct errors after clearance. Understanding these basics, and keeping documentation accurate in an increasingly faceless, data-driven system, is the surest way to keep goods moving and avoid costly disputes.

This article is for general guidance and reflects the Customs Act, 1962 as amended (including the Finance Act, 2025), current as of 2026. Customs law changes through Finance Acts, notifications, and CBIC regulations; confirm the current position on the official CBIC portal (cbic.gov.in) before acting.