GST Law in India: Acts, Rules, Compliance, and Key Provisions

The type of GST depends largely on whether a supply is intra-State or inter-State and the relevant statutory conditions. A business must determine the place of supply before selecting the tax component.

The place-of-supply provisions can produce different outcomes in specific transactions, particularly for services, exports, imports and special categories. 

Businesses should not classify a transaction solely by where an invoice is issued.

A person becomes liable for GST registration when the applicable statutory conditions are met, subject to exemptions and special rules. Registration is generally obtained electronically through the GST common portal using the prescribed application process.

The registration framework covers ordinary taxable persons as well as specified categories such as certain persons making inter-State supplies, e-commerce-related cases and persons required to deduct or collect tax at source, subject to the applicable provisions and exemptions.

The registration certificate is made available electronically after registration is granted. A registered person must also keep registration particulars accurate and amend eligible details when changes occur.

GST registration thresholds are not a single nationwide number for every business or transaction. The applicable threshold depends on the nature of supplies, the State or Union territory, the statutory provision and relevant exemptions.

Certain categories can have compulsory-registration rules even when a general turnover threshold might otherwise apply. Businesses should therefore assess the nature and location of their supplies before deciding that registration is unnecessary.

Because thresholds and compulsory-registration provisions can change through amendments and notifications, verify the current rule for the relevant financial year and business activity before relying on a threshold figure.

GST compliance involves more than paying tax. A registered business must maintain appropriate records, issue prescribed tax documents, reconcile transactions, claim input tax credit only where permitted, file applicable returns and pay tax within the relevant timelines.

• Maintain accurate sales, purchase and tax records.
• Issue tax invoices, credit notes, debit notes or other prescribed documents where applicable.
• Determine the correct tax rate and classification for each taxable supply.
• Reconcile outward supplies, purchases and input tax credit with relevant GST records.
• File applicable GST returns and pay tax, interest or other amounts within the prescribed timelines.
• Keep registration details and supporting records current.
• Respond to notices or requests from the tax authorities within the prescribed period.

Input tax credit (ITC) allows an eligible registered person to offset qualifying input tax against output tax, subject to the conditions and restrictions in the GST law. ITC is not an automatic deduction merely because GST was charged on a purchase.

The business should hold the prescribed tax document, receive the relevant supply, satisfy the applicable return and payment conditions, and comply with restrictions or reversal requirements. Certain goods, services and circumstances can be subject to blocked or restricted credit.

A strong reconciliation process helps identify mismatches, credit-note adjustments, reversals and other issues before the return is filed.

GST law prescribes requirements for tax invoices and other documents, including particulars that help identify the supplier, recipient, supply, tax and consideration. Businesses should use the document type appropriate to the transaction.

E-invoicing is a separate electronic reporting framework for notified taxpayers and documents. The current mandate covers taxpayers meeting the prescribed aggregate annual turnover threshold and other conditions, with specified exemptions.

For taxpayers with aggregate annual turnover of Rs. 10 crore or more, a 30-day reporting restriction applies to covered e-invoices from 1 April 2025. The Invoice Registration Portal can reject reporting after the permitted period.

The return or statement required depends on the taxpayer’s registration type, business activity and applicable scheme. Common compliance forms include GSTR-1 for specified outward-supply details and GSTR-3B for summary reporting and tax payment.

Other forms apply to particular taxpayers or transactions, including composition taxpayers, input service distributors, tax deducted or collected at source, non-resident taxpayers and annual compliance.

Businesses should follow the return calendar applicable to their registration and verify any extensions or portal advisories for the relevant tax period.

GST non-compliance can result in interest, late fees, penalties, recovery proceedings, cancellation or suspension of registration, and other consequences depending on the nature and severity of the default. The applicable consequence depends on the specific statutory provision and facts.

• Late payment can result in interest under the applicable provisions.
• Delayed return filing can attract late fees, subject to applicable waivers or concessions.
• Incorrect reporting can require correction, reversal, additional tax or other action.
• Certain offences or fraudulent conduct can attract statutory penalties and, in specified circumstances, prosecution.
• Failure to comply with registration requirements can create tax and enforcement exposure.

There is no single penalty that applies to every GST mistake. Businesses should identify the specific default and applicable section or rule rather than relying on a generic penalty amount.

GST law has continued to change through legislative amendments, notifications and procedural measures. Major rate reforms recommended at the 56th GST Council meeting took effect for most affected goods and services from 22 September 2025 after the relevant legal instruments were issued.

• The GST rate structure was rationalised, with most supplies moving within a broader 5% and 18% structure and a 40% rate for specified demerit and luxury supplies.
• The Finance Act, 2026 brought the omission of Section 13(8)(b) of the Integrated Goods and Services Tax Act, 2017, concerning intermediary services, into effect from 1 April 2026.
• An amendment to Section 101A of the Central Goods and Services Tax Act, 2017 concerning appeals under the advance-ruling framework took effect from 1 April 2026.
• Other recommended measures concerning post-supply discounts and provisional refunds require the relevant legal provisions and effective dates to be checked before application.
• GSTN has continued to introduce portal and return-process enhancements that affect compliance workflows.

The GST Council’s recommendation date is not necessarily the legal effective date. Businesses should verify the relevant notification, statutory amendment, rule or advisory before changing treatment.

A reliable GST record system should connect invoices, books of account, payment records, returns and supporting documents. The records should allow the business to explain how taxable value, tax liability and input tax credit were determined.

• Retain sales and purchase invoices and other prescribed documents.
• Maintain credit notes, debit notes and adjustment records.
• Keep evidence supporting input tax credit and reversals.
• Retain filed returns, payment challans and reconciliations.
• Track GST registration amendments and correspondence with tax authorities.
• Keep copies of material notifications or professional tax positions relied upon for unusual transactions.

GST affects cash flow because tax may become payable before a customer settles the related invoice, while eligible input tax credit and refunds may be realised at different times. Businesses should therefore include GST liabilities and receivables in working-capital planning.

For example, a growing distributor may need additional working capital when sales rise faster than customer collections. Separately, a business may incur costs for accounting software, tax support or process upgrades when compliance requirements change.

An established business assessing a funding requirement should compare the expected cash-flow gap, borrowing cost and repayment capacity before taking credit.

Eligible established businesses may consider a Bajaj Finance Business Loan for legitimate business expenses such as working capital, technology upgrades or other operational requirements, subject to business loan eligibility, credit assessment and applicable terms.

It offers loan amounts from Rs. 2 lakh to Rs. 80 lakh, repayment tenures from 12 months to 96 months, and interest rates from 14% to 23.50% per annum. Processing fees can be up to 4.72% inclusive of applicable taxes.

Eligibility criteria includes Indian nationality, self-employed status, business vintage of at least 3 years, a CIBIL score of 650 or higher, and age of 21 to 80 years, subject to the applicable maturity condition. Compare the total borrowing cost with projected cash flows before applying.

• Click the 'Check Loan Offer' button to open the online application form.
• Enter basic details, including Name, PAN, Date of Birth, PIN Code, and Business details, and click 'CONTINUE'.
• Complete banking verification and continue.
• View your offer details, select the loan type — Term Loan, Flexi Dropline Loan, or Flexi Hybrid Loan — and choose the repayment tenure.
• Review the details and submit the business loan application.