1 Sep 2025

Detailed Write-up on GST Compliance under CGST/SGST/UTGST Laws — With Examples and Notes

1. Registration (Sections 22–30, Rule 8–19)

Key Points:

  • Mandatory Registration:
    Required when turnover crosses threshold limits:
    • ₹40 Lakh for goods suppliers (in most states)
    • ₹20 Lakh for service providers
      Specific cases mandate registration irrespective of turnover, e.g., interstate suppliers, casual taxable persons, NRI suppliers, e-commerce operators, Input Service Distributor (ISD).
  • Voluntary Registration:
    Any person can register voluntarily to avail GST benefits even if turnover below threshold.
  • Casual/NRI Registration:
    Valid for 90 days, requires advance tax deposit. Extendable on request.
  • Amendments & Cancellation:
    • Amendments to business details through Form GST REG-14.
    • Cancellation via Form GST REG-16; revocation via Form REG-21.
  • Suo Moto Registration:
    Tax authorities may register a person if liable but not registered.
  • Input Service Distributor (ISD) Registration:
    Mandatory irrespective of turnover; ISDs distribute ITC within group entities (See Note 1).

Example:
A trader supplying goods only within a state and having turnover ₹42 Lakh must register. A small consultancy firm with ₹15 Lakh turnover may voluntarily register.

2. Tax Invoice, Debit & Credit Notes (Sections 31–34, Rule 46–55A)

Invoice Essentials:

  • Name, address, GSTIN of supplier
  • Consecutive serial number unique per financial year
  • Date of issue
  • Recipient details and GSTIN (if registered)
  • HSN/SAC codes
  • Quantity and value of goods/services
  • Tax rate and amount (CGST, SGST, IGST)
  • Place of supply and State Code

Time Limits:

  • Goods: Invoice before or at time of removal
  • Services: Invoice within 30 days from supply date

Bill of Supply:
Issued by exempted or composition scheme taxpayers in place of tax invoice.

E-Invoicing:
Mandatory for turnover exceeding ₹5 Crore from 1 August 2023 onwards, for B2B supplies.

Debit/Credit Notes:

  • Credit Note issued to reduce tax liability (e.g., after goods return, discount).
  • Debit Note issued to increase taxable value (e.g., price escalation).
  • Credit Note must be issued by 30 November following financial year or annual return filing deadline, whichever earlier.
  • No time limit for Debit Notes but must be reported in returns.

Example:

  • A retailer returns ₹20,000 worth of defective goods — the supplier issues a credit note reducing invoice value and tax.
  • Subsequently, supplier revises price upwards by ₹5,000 and issues a debit note accordingly.

3. Input Tax Credit (Sections 16–21, Rule 36–45)

Eligibility Conditions:

  • Possession of Tax Invoice/Debit Note
  • Receipt of goods/services
  • Tax paid to supplier (cash or credit) and reflected in returns
  • Filing of GST returns

Time Limits:

  • ITC claim must be made before 30 November following end of Financial Year or filing of Annual Return (whichever earlier).

Blocked Credit (Section 17(5)):

  • Motor vehicles for personal use (except specified cases)
  • Food/beverages, outdoor catering
  • Membership of clubs, health/fitness centres
  • Works contract services related to construction of immovable property (except plant/machinery)
  • Goods and services used for personal consumption

(See Note 3 for detailed blocked credit categories)

180-Day Reversal Rule:
If payment is not made to supplier within 180 days from invoice date, ITC claimed must be reversed with interest. ITC can be reclaimed after payment is made.

ISD Credit Distribution:

  • ITC on common input services distributed monthly to branches based on turnover ratio.
  • Requires separate ISD registration and monthly filing of GSTR-6. (See Note 1)

Job Work Credits:

  • Inputs must be returned within 1 year; capital goods within 3 years or else treated as supply.
  • ITC can be claimed on goods sent to job worker.

Example:

  • Company A avails ITC on input goods invoiced on 1st Jan 2025 but pays supplier only after 20th Jul 2025 (>180 days): ITC must be reversed in July 2025 return with interest.
  • Later on payment to supplier is made: ITC can be reclaimed in subsequent return (no interest refund).

4. Returns (Sections 37–48, Rule 59–83)

Return FormApplicabilityFiling FrequencyKey Contents
GSTR-1All registered taxpayersMonthly/Quarterly (QRMP scheme)Outward Supply invoices (details of sales)
GSTR-3BAll registered taxpayersMonthlySummary of inward/outward supplies and tax payment
GSTR-9Turnover > ₹2 CrAnnualAnnual return with supply & ITC details
GSTR-9CTurnover > ₹5 CrAnnualReconciliation & audit certification of returns
CMP-08Composition taxpayersQuarterlyDetails of tax payment under composition
GSTR-4Composition taxpayersAnnualAnnual return under composition scheme
GSTR-5Non-resident taxable personsMonthlyReturn for NRI suppliers
GSTR-6ISDMonthlyITC distribution details
GSTR-7TDS deductorsMonthlyTDS deducted under GST
GSTR-8E-commerce operatorsMonthlyTCS collected details
GSTR-10CancellationOnceFinal return post cancellation

 5. Tax Payment (Sections 49–53, Rule 85–88C)

Electronic Ledgers:

  • Cash Ledger: Cash and credited tax payments
  • Credit Ledger: ITC balance
  • Liability Ledger: Tax and interest liabilities

Order of Payment:

  • ITC utilized first (CGST, SGST, IGST in order as per Sec 49A)
  • Balance from cash ledger

Interest:

  • 18% p.a. on late payment of tax
  • 24% p.a. on excess ITC claims or when availed erroneously (unjust enrichment)

6. Refunds (Sections 54–58, Rule 89–97A)

Types of Refunds:

  • Excess balance in electronic cash ledger
  • Export of goods or services (zero-rated supplies)
  • Refund due to inverted duty structure (tax on inputs higher than on outputs)
  • Refund after assessment or order

Time Limit:

  • File within 2 years from relevant date.

Interest:

  • Payable if refund not processed within 60 days.

Documentation:

  • Exporters must furnish export invoices and bank realization certificates.
  • For inverted duty structure, statement of inputs and outputs is required.

7. Assessment & Audit (Sections 59–66)

Assessment Types:

  • Self-assessment: Taxpayer determines tax liability.
  • Provisional: Temporary assessment on request with security deposit.
  • Scrutiny: Examination of returns/documents by tax officers.
  • Best Judgment: When taxpayer fails to comply.

Audit:

  • Tax Authority Audit: Physical/financial audit of records.
  • Special Audit: Conducted by CA/CMA appointed by authority if needed.

8. TDS & TCS (Sections 51–52)

TDS:

  • Deducted by government departments, local authorities, PSUs on payments exceeding ₹2.5 Lakh at 2% (CGST+SGST or IGST).
  • Deductor files GSTR-7 monthly.

TCS:

  • Collected by e-commerce operators at 1% on net taxable value of supplies made through them.
  • Filed through GSTR-8 monthly.

9. Annual Return & Reconciliation (Section 44)

  • GSTR-9: Annual return for taxpayers with turnover > ₹2 Cr. Contains detailed supply and ITC information.
  • GSTR-9C: Reconciliation statement signed by CA/CMA for taxpayers with turnover > ₹5 Cr.
  • Obligatory reconciliation between books of account, GSTR-3B, and GSTR-1 returns.

10. Accounts & Records (Sections 35–36, Rule 56–58)

  • Maintain records of sales, purchases, input/output taxes, production, stock, and consignment for 6 years.
  • Electronic records allowed.
  • Period starts from due date of filing annual return.

11. E-way Bills (Rules 138–138D)

  • Needed if goods value > ₹50,000 for inter/intra-state movement.
  • Validity depends on distance traveled:
    • 1 day for up to 100 km
    • Additional day per 100 km for subsequent distances
  • Must be carried along with invoice or bill of supply.
  • Random inspection allowed; report to be filed electronically.
  • Detention report through e-way bill portal in case of delay.

Exceptions:

  • Non-motorized conveyance
  • Goods exempted under GST
  • Goods transported under customs supervision

12. Penalties, Offences & Appeals (Sections 122–138)

  • Penalties: For fraud, default, non-filing – minimum ₹10,000 or tax evaded.
  • Offences: Fraudulent activities, false invoicing, non-payment, or mis-reporting.
  • Appeals: To Commissioner, Appellate Tribunal, High Court, or Supreme Court within prescribed timelines using GST APL forms.

13. Reverse Charge Mechanism (RCM)

Concept:

Under RCM, recipient is liable to pay GST instead of supplier for notified goods/services or under specific circumstances.

Legal Provisions:

SectionDescription
Section 9(3)Notified goods/services under RCM
Section 9(4)Supply from unregistered supplier to registered recipient (notifications restrict applicability)
IGST Sections 5(3) & 5(4)Reverse charge for interstate transactions

Common RCM Goods and Services:

  • Services under RCM:
    Goods Transport Agency (GTA), legal services by advocates, director’s remuneration (if contractual), sponsorships, security services by non-body corporates, government rents, insurance agents.
  • Goods under RCM:
    Cashew nuts (unprocessed), bidi wrapper leaves, tobacco leaves, silk yarn, government-used vehicles sold.

Compliance Requirements:

  • Tax Payment:
    • Must be paid in cash (no ITC use) at applicable rates.
  • Time of Supply:
    • Goods: Earlier of receipt or payment (or 30 days from invoice).
    • Services: Earlier of payment or 60 days from invoice.
  • Input Tax Credit:
    • Allowed only after tax paid under RCM.
    • Claimable in same month’s return (Form GSTR-3B).
  • Invoice & Records:
    • Self-invoice if supplier unregistered.
    • Maintain detailed records.
  • Return Reporting:
    • Disclose RCM tax paid in GSTR-3B Table 3.1(d), ITC claimed in Table 4A(3).

Special Cases:

  • Director’s Remuneration:
    Taxable under RCM if director is contractually engaged, not an employee.
  • GTA Services:
    RCM applicable to specified recipients like factories, companies, partnership firms, except if they opt for forward charge.
  • Real Estate:
    Promoters paying for construction goods/services from unregistered suppliers must pay RCM if <80% supplies from registered suppliers.

RCM on Rent:

ConditionGST Applicability
Registered tenant to unregistered landlordRCM applies on rent paid for commercial property
Registered tenant to registered landlordGST payable by landlord (forward charge)
Residential property rented for business useRCM applies if tenant is registered and if tenant is unregistered, no RCM.
Residential property rented for personal useExempt under GST

Tax rate: Standard 18%

NOTES

Note 1: Input Service Distributor (ISD)

  • ISD distributes ITC of input services (not goods) to branches with same PAN but different GSTINs.
  • Separate GSTIN required.
  • Must distribute ITC monthly in form GSTR-6 using turnover ratios.
  • Recent amendments (July 2024) allow internal transfers from units to ISD.
  • ISD invoices issued for credit distribution.

Note 2: Debit and Credit Notes

  • Credit Note reduces taxable value/tax liability and must be issued before prescribed deadline (30 Nov post FY or annual return).
  • Debit Note increases taxable value, no time limit but must be declared in returns.
  • Both must follow prescribed format including serial no, GSTIN, related invoice no.
  • For credit note issue, buyer of goods/ services must accept credit note in his GST portal thru IMS.

Note 3: Blocked Credits under Section 17(5)

  • ITC blocked on motor vehicles unless registered for transportation of passengers or used for taxable supplies.
  • No ITC on food, beverage, health, membership charges except for taxable outward supplies.
  • Works contracts related to immovable property construction blocked (except plant/machinery).
  • Services of general insurance, repairs of vehicles, gift or free sample,

Note 4: Reversal of ITC for Non-Payment within 180 Days

  • If payment to supplier not made within 180 days from invoice, ITC reversed with interest.
  • Reversal done in next monthly GSTR-3B.
  • ITC can be reclaimed when payment is made later; interest (paid earlier) not refundable.
  • Exemptions apply for RCM payments and deemed supplies.

Note 5: Job Work Provisions

  • Inputs must be returned within 1 year, capital goods within 3 years or deemed supply arises.
  • Goods can be sent to job worker without tax payment on challan basis.
  • Return of inputs must be recorded in Form ITC-04 quarterly.
  • Multiple job workers allowed.

Note 6: TDS & TCS under GST

  • Government and notified entities deduct 2% TDS on contracts > ₹2.5 Lakh.
  • TDS deposit and return filing within 10 days of month-end.
  • E-commerce operators collect 1% TCS on supplies through them.
  • Proper certificate issuance and monthly returns mandatory.

Note 7: E-way Bill Rules Summary

  • E-way bill mandatory before goods movement above ₹50,000.
  • Must carry invoice and e-way bill.
  • Vehicle can be inspected; report to be filed electronically.
  • Detention reporting available if vehicle stopped > 30 minutes.
  • Validity depends on distance; exemptions apply for certain goods and intrastate movement under ₹50,000.

Illustrative Example to Summarize Key Compliance Flow

ActivityCompliance NeededTimelineForm/Return
Cross threshold turnoverRegister under GSTUpon crossing limitGST REG-01
Supply goods > ₹50,000Generate E-way BillBefore movementGST EWB-01
Issue Tax InvoiceInvoice to contain complete detailsAt or before supplyManual/Software generated
Avail Input Tax CreditEnsure invoice, receipt & payment within 180 daysWithin 30 Nov next FYGSTR-3B
File Outward Supply ReturnDeclare invoices and supplies in GSTR-1Monthly/QuarterlyGSTR-1
File Summary ReturnPay tax and claim ITC in GSTR-3BMonthlyGSTR-3B
Pay tax under RCMIf applicable, pay tax in cashAs per time of supplyGSTR-3B with RCM details
File Annual ReturnIf turnover exceeds ₹2 CrAnnuallyGSTR-9
Undergo GST AuditIf turnover exceeds ₹5 Cr or as directedWhen calledGST Audit Report GSTR-9C

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