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CGST Act, 2017 — Complete Overview

The Central Goods and Services Tax Act, 2017 is the primary legislation governing GST on intra-state supplies. With 174 sections across 21 chapters, it covers levy, collection, ITC, registration, returns, payments, refunds, assessment, audit, appeals, offences, and penalties — forming the backbone of India's indirect tax system.

Sections
174
Chapters
21
Effective Date
1 Jul 2017
Definitions
121 Terms

Chapter-wise Structure of CGST Act

I

Preliminary

Sec 1–2

Short title, commencement, definitions. Section 2 defines 121 key terms including 'aggregate turnover', 'business', 'capital goods', 'casual taxable person', 'composite supply', 'continuous supply', 'exempt supply', 'input tax credit', 'mixed supply', 'output tax', 'person', 'reverse charge', 'supply', 'taxable supply', and 'zero-rated supply'.

II

Administration

Sec 3–6

Appointment of officers — Commissioner, Additional/Joint/Deputy/Assistant Commissioner, Inspector. Class of officers and their jurisdictions. Powers to delegate authority.

III

Levy & Collection of Tax

Sec 7–11

Section 7: Scope of supply (includes sale, transfer, barter, exchange, license, rental, lease, disposal for consideration in course of business). Section 9: Levy rate, reverse charge. Section 10: Composition scheme (≤₹1.5 Cr turnover, 1-6% tax).

IV

Time of Supply

Sec 12–14

Section 12: Time of supply for goods (invoice date or payment date, whichever is earlier). Section 13: Time of supply for services. Section 14: Change in rate of tax.

V

Value of Supply

Sec 15

Section 15: Transaction value as the basis. Inclusions: packing, commission, interest, late fees, subsidies. Exclusions: discounts before or at supply time. Rules for related-party transactions, pure agent deductions.

VI

Input Tax Credit

Sec 16–21

Section 16: Eligibility and conditions for ITC (possession of invoice, goods/services received, tax paid to government, return filed). Section 17: Apportionment and blocked credits. Section 18: ITC availability in special circumstances. Section 19: ITC on job work.

VII

Registration

Sec 22–30

Section 22: Mandatory registration (T/O > ₹20L/₹40L). Section 24: Compulsory registration regardless of turnover (casual taxable person, NRI, reverse charge, e-commerce operator, TDS/TCS). Section 25: Deemed registration in 3 working days.

VIII

Tax Invoice, Credit & Debit Notes

Sec 31–34

Section 31: Tax invoice (time limits, contents). Section 33: Amount of tax to be indicated. Section 34: Credit and debit notes — issuance, timelines, and reporting in returns.

IX

Returns

Sec 35–48

Section 37: GSTR-1 (outward supplies). Section 38: GSTR-2A/2B (auto-drafted). Section 39: GSTR-3B (monthly summary). Section 44: Annual return GSTR-9. Section 45: Final return GSTR-10.

X

Payment of Tax

Sec 49–53A

Section 49: Electronic cash/credit ledger. Section 50: Interest on delayed payment (18% p.a., reduced to net liability from Sep 2020). Section 51: TDS by government. Section 52: TCS by e-commerce operators.

XI

Refunds

Sec 54–58

Section 54: Claim of refund (exports, inverted duty, excess payment). 2-year time limit. Section 56: Interest on delayed refund (6% p.a. after 60 days). Section 57: Consumer Welfare Fund.

XII

Assessment

Sec 59–64

Self-assessment (Section 59), provisional assessment (Section 60), scrutiny (Section 61), best judgment assessment (Section 62–63), summary assessment (Section 64). Tax officer powers to assess when returns not filed.

XIII

Audit

Sec 65–66

Section 65: Audit by tax authorities (notice period, documentation). Section 66: Special audit — ordered by Commissioner if complexity or revenue leakage suspected. CA/CMA appointed by Commissioner.

XIV

Inspection, Search, Seizure & Arrest

Sec 67–72

Section 67: Power of inspection, search, and seizure (reasons to believe tax evasion). Section 69: Power to arrest (tax evasion > ₹5 Cr = cognizable and non-bailable). Section 70: Power to summon.

XV

Demands & Recovery

Sec 73–84

Section 73: Demand for non-fraud cases (3-year limitation, 10% penalty). Section 74: Demand for fraud/willful misstatement (5-year limitation, 100% penalty). Section 79: Recovery methods — deduction from bank, attachment of property, civil imprisonment.

XVI

Liability in Special Cases

Sec 85–94

Transfer of business, guardian liability, agent liability, joint liability of partners, amalgamation, demerger provisions.

XVII

Advance Ruling

Sec 95–106

Section 95: Definitions (advance ruling, applicant). Section 97: Application process (₹5,000 fee per question). Section 98: Procedure — pronouncement within 90 days. Section 103: Ruling binding on applicant and jurisdictional officer.

XVIII

Appeals & Revision

Sec 107–121

Section 107: Appeal to Appellate Authority (3 months). Section 109: GST Appellate Tribunal (GSTAT). Section 112: Appeal to GSTAT (3 months). Section 117–118: Appeal to High Court and Supreme Court.

XIX

Offences & Penalties

Sec 122–138

Section 122: Penalty for specified offences (₹10,000 or tax amount). Section 129: Detention of goods in transit. Section 130: Confiscation of goods. Section 132: Punishment for certain offences (imprisonment up to 5 years for tax evasion > ₹5 Cr).

XX

Transitional Provisions

Sec 139–142

Migration of existing taxpayers, CENVAT credit carry-forward, pending proceedings, treatment of inputs in stock/transit on appointed day.

XXI

Miscellaneous

Sec 143–174

Job work provisions, GST Practitioners, anti-profiteering (Section 171), power to make rules/regulations, removal of difficulties, repeal and savings.

Key Definitions — Section 2

Aggregate Turnover

Total taxable supplies + exempt supplies + exports + inter-state supplies, excluding inward supplies under reverse charge. Computed on all-India basis for every PAN.

Composite Supply

Supply of two or more goods/services naturally bundled in the ordinary course of business, where one is the principal supply (e.g., goods + insurance + transport).

Mixed Supply

Supply of two or more goods/services NOT naturally bundled, for a single price. Taxed at the rate of the supply attracting the highest tax rate.

Continuous Supply of Goods

Supply where goods are provided on a recurrent basis under a contract, and invoicing is linked to payment milestones or periods.

Input Service Distributor

Office of supplier that receives invoices for input services and distributes ITC among its branches using GSTR-6.

Reverse Charge

Tax liability falls on recipient instead of supplier — applies to specified goods/services (Section 9(3)) and purchases from unregistered persons (Section 9(4)).

CGST Act FAQs

How many sections does the CGST Act have?

The CGST Act, 2017 has 174 sections organized into 21 chapters, covering everything from definitions and levy to offences, penalties, and transitional provisions. It was enacted on April 12, 2017 and came into force on July 1, 2017.

What is the difference between CGST and SGST?

CGST (Central GST) is the tax levied by the Central Government on intra-state supplies. SGST (State GST) is levied by the respective State Government on the same intra-state supply. Both are charged at equal rates. For inter-state supplies, IGST (Integrated GST) is levied by the Central Government at a rate equal to CGST + SGST.

When was the CGST Act implemented?

The CGST Act was passed by Parliament on March 29, 2017, received Presidential assent on April 12, 2017, and came into effect on July 1, 2017 — the date GST was launched across India, replacing 17 indirect taxes including Central Excise, Service Tax, and VAT.

What is Section 9 of CGST Act?

Section 9 is the charging section — it levies CGST on all intra-state supplies of goods or services at rates notified by the government (0%, 5%, 12%, 18%, 28%). Section 9(3) specifies goods/services under reverse charge. Section 9(4) deals with reverse charge on purchases from unregistered persons.

Can CGST credit be used to pay SGST?

No. CGST credit can only be utilized for payment of CGST and IGST (in that order). It cannot be used for SGST/UTGST payment. Similarly, SGST credit can only be used for SGST and IGST. This cross-utilization restriction is prescribed under Section 49 of the CGST Act.

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