Goods and Services Tax (GST) is one of the most important tax systems for businesses in India. Whether you run a startup, small business, online store, or professional service, understanding GST compliance is essential to avoid penalties and maintain smooth operations.
This guide by The Tax Company covers GST registration, return filing, tax rates, input tax credit, compliance requirements, and penalties — everything you need to stay fully compliant in 2026.
Step by Step
GST Registration Process
1
Visit GST Portal
Go to gstin.gov.in and click on 'New Registration' to begin the process.
2
Submit PAN & Business Details
Enter PAN, mobile, email, state, and type of business entity.
3
Verify with OTP
Authenticate your registered mobile number and email with OTPs sent by the portal.
4
Upload Documents
Upload PAN, Aadhaar, address proof, bank details, and business documents.
5
Receive ARN
Application Reference Number is generated to track your registration status.
6
GSTIN Issued
After verification your unique 15-digit GSTIN is issued within 3–7 working days.
Basics
GST Components
What is GST?
Goods and Services Tax (GST) is a unified indirect tax introduced in India on 1 July 2017, replacing multiple levies such as VAT, service tax, and excise duty. It applies on the supply of goods and services across India and is governed by the GST Council.
CGST — Central GST
Collected by the central government on intra-state supply of goods and services.
SGST — State GST
Collected by the state government on intra-state sales — shared equally with CGST.
IGST — Integrated GST
Levied on inter-state supplies and imports by the central government. Revenue is shared between the centre and destination state.
Eligibility
Who Should Register for GST?
Goods Businesses
Annual turnover above ₹40 lakh (₹20 lakh in special category states).
Service Providers
Annual turnover above ₹20 lakh (₹10 lakh in special category states).
E-commerce Sellers
Mandatory registration regardless of turnover — applies to all marketplace sellers.
Interstate Suppliers
Any business supplying goods or services across state borders must register.
Importers & Exporters
All businesses involved in import or export of goods or services.
Casual Taxable Persons
Seasonal or occasional suppliers operating in states other than their home state.
Paperwork
Documents Required
PAN Card
Of business owner or legal entity — mandatory for all GST registrations.
Aadhaar Card
Identity and address verification for proprietor, partners, or directors.
Business Registration
Certificate of incorporation, partnership deed, or shop act licence.
Address Proof
Electricity bill, rent agreement, or property tax receipt for business premises.
Bank Details
Cancelled cheque or recent bank statement of the registered business account.
Photograph & DSC
Passport-size photo plus digital signature certificate for companies and LLPs.
Filing
GST Returns
Click each return type to view filing details, due dates, and requirements.
GSTR-1 — Outward Supplies Return
Monthly or Quarterly · Sales details
▾
GSTR-1 captures all outward supply (sales) details for the tax period — B2B invoices, B2C transactions, credit notes, and debit notes issued during the month or quarter.
- B2B invoice-level details for all registered buyers
- Summary of B2C sales (invoice-level for inter-state above ₹2.5 lakh)
- Export invoice details with shipping bill and port code
- Credit notes and debit notes issued during the period
GSTR-3B — Monthly Summary Return
Monthly · Tax liability + ITC payment
▾
GSTR-3B is a self-declared summary return filed every month. It consolidates outward supplies, inward supplies, ITC claimed, and net GST liability paid for the period.
- Summary of outward taxable supplies (not invoice-level)
- Total eligible input tax credit claimed for the month
- Net GST payable and confirmation of payment made
- Must be filed even for nil-transaction months
GSTR-9 — Annual Return
Annual · Full year summary reconciliation
▾
GSTR-9 consolidates all monthly or quarterly returns filed during the financial year. It reconciles data across GSTR-1 and GSTR-3B submissions and identifies any discrepancies.
- Full year outward and inward supply summary by quarter
- ITC claimed vs ITC eligible reconciliation
- Tax paid under each head — CGST, SGST, IGST
- Demands, refunds, and late fees paid during the year
GSTR-9C — Reconciliation Statement
Annual · CA certified · Turnover above ₹5 crore
▾
GSTR-9C is a reconciliation statement applicable to taxpayers with annual turnover above ₹5 crore. It must be self-certified (turnover ≤ ₹5 crore) or certified by a Chartered Accountant.
- Reconciles GSTR-9 figures with audited financial statements
- Any differences must be explained with clear reasons
- Identifies unreported supplies or incorrect ITC claims
- Must be signed and certified by a practising CA for applicable taxpayers
Small Businesses
GST Composition Scheme
The Composition Scheme is a simplified GST option for small businesses with turnover up to ₹1.5 crore (₹75 lakh for service providers). Businesses pay a flat rate on turnover instead of regular GST rates and file simplified quarterly statements.
Restriction: Composition dealers cannot claim Input Tax Credit and cannot make inter-state supplies. Ideal for local, small-scale businesses seeking minimal compliance burden.
Lower Tax Rate
Pay a flat 1%–5% on turnover instead of standard GST slab rates — significantly reduces outflow.
Simplified Filing
File CMP-08 quarterly summary and GSTR-4 annually — far simpler than monthly GSTR-1 and GSTR-3B.
No ITC Benefit
Cannot claim input tax credit on purchases — your buyers also cannot claim ITC from your invoices.
No Interstate Sales
Restricted to intra-state supplies only — cannot supply goods or services to other states.
Tax Slabs
GST Rates in India
0%
Essential Goods & Services
Fresh food, milk, eggs, education, basic healthcare — daily necessities exempt from GST.
5%
Basic Goods
Packaged food items, apparel below ₹1,000, passenger transport, economy air tickets.
12%
Standard Goods
Computers, processed and packaged foods, business class travel, non-AC hotel rooms.
18%
Most Services
IT services, professional services, telecom, insurance, restaurants, AC hotels.
28%
Luxury Goods & Demerit Goods
Automobiles, luxury goods, tobacco products, aerated drinks, casinos — may attract additional cess on top of 28%.
Saving Tax
Input Tax Credit (ITC)
Input Tax Credit allows businesses to reduce their GST liability by claiming credit for GST already paid on purchases. Example: your business pays ₹18 GST on raw materials and collects ₹36 GST on sales — you remit only the net ₹18 to the government.
Click to expand conditions and restrictions.
Conditions to Claim ITC
5 mandatory requirements
▾
- Possess a valid GST invoice or debit note from a registered supplier
- The supplier must have filed GSTR-1 and the supply must appear in your GSTR-2B
- GST must have been paid to the government by the supplier
- Goods or services must have been actually received by you
- ITC claim must be made within the stipulated time limit — before filing September return
Blocked ITC — Where Credit Cannot Be Claimed
Section 17(5) restrictions
▾
- Motor vehicles used for personal purposes (except dealers, driving schools, transport operators)
- Food, beverages, and outdoor catering — unless part of your taxable supply chain
- Club memberships and health services provided to employees
- Construction of immovable property on own account
- Goods or services used for personal consumption — not for business purposes
Stay Compliant
GST Compliance Requirements
Issue GST Invoices
Every supply requires a proper tax invoice with GSTIN, HSN/SAC codes, and full tax breakup.
Maintain Records
Keep accurate books of accounts and GST records for a minimum of 6 years.
File Returns on Time
File GSTR-1 and GSTR-3B every month by due dates — nil returns must also be filed.
Pay Tax Liability
Pay full GST liability by the due date to avoid 18% per annum interest charges.
Use HSN / SAC Codes
Correctly classify all goods and services with proper Harmonised System codes on every invoice.
Reconcile GSTR-2B
Match your purchase register with GSTR-2B monthly to identify missing ITC before filing.
Penalties
GST Penalties & Late Fees
| Violation | Penalty / Consequence |
|---|---|
| Late GST return filing | ₹50 per day (₹20/day nil return) — maximum ₹5,000 per return |
| Unpaid or short-paid GST | Interest at 18% p.a. on unpaid amount from original due date |
| Incorrect GST filing | Penalty + interest + risk of scrutiny assessment by the department |
| Non-registration when mandatory | 100% of tax due or minimum ₹10,000 — whichever is higher |
| Tax evasion or fraud | Up to 3× the tax evaded + possible criminal prosecution under GST Act |
| Incorrect ITC claim | Penalty equal to the amount wrongly claimed plus 18% interest |
Avoid These
Common GST Compliance Mistakes
No Registration
Operating without GST registration when legally required invites heavy penalties.
Wrong Rate Classification
Incorrect HSN/SAC codes lead to wrong tax being charged — a common audit trigger.
Missing Filing Deadlines
Late returns attract daily late fees, interest charges, and affect buyers' ITC claims.
Incorrect ITC Claims
Claiming credit without valid invoices or on blocked categories leads to penalties.
Poor Record Keeping
Missing invoices or inconsistent accounting creates problems during assessment.
Not Filing Nil Returns
Even zero-transaction months require a nil GSTR-3B to avoid late fee accumulation.
Advantages
Benefits of GST Compliance
Legal Business Operations
Operate lawfully with a valid GSTIN and issue fully compliant tax invoices.
Avoid Penalties
No late fees, no interest charges, and no scrutiny notices from tax authorities.
Claim Input Tax Credit
Reduce overall tax outflow by claiming ITC on all eligible business purchases.
Financial Clarity
Structured accounting and returns provide clear visibility into business finances.
Business Credibility
GST compliance improves trust with vendors, institutional buyers, and banks.
Smooth Audits
Well-maintained compliance records make assessments and audits hassle-free.
Expert Help
Why Choose The Tax Company for GST?
GST Registration
End-to-end assistance from document collection to GSTIN issuance — fully online.
Return Filing
Monthly and quarterly GSTR-1 and GSTR-3B filing handled accurately on time.
GST Advisory
Expert guidance on applicable rates, correct HSN codes, and compliance strategy.
ITC Maximisation
Review all purchases to identify and claim every eligible input tax credit.
Ongoing Compliance & Notice Management
Continuous GST portal monitoring, notice response management, and proactive regulatory updates to keep your business protected year-round.
FAQ
Frequently Asked Questions
GSTIN is a unique 15-digit number issued to every GST-registered taxpayer. The first two digits represent the state code, the next ten digits are the PAN, and the remaining digits identify the entity type and include a check digit.
Businesses with turnover above ₹40 lakh (goods) or ₹20 lakh (services), all e-commerce sellers, interstate suppliers, casual taxable persons, and importers must register for GST regardless of their turnover.
ITC allows you to offset GST paid on purchases against GST collected on sales — reducing your net liability. Key conditions: valid invoice, supplier must have filed their return, and the tax must have been remitted to the government.
Late fee of ₹50 per day (₹20 per day for nil returns), capped at ₹5,000 per return, plus 18% per annum interest on any unpaid tax amount from the due date.
Yes. All e-commerce sellers on platforms like Amazon, Flipkart, or Meesho must obtain GST registration regardless of their annual turnover. Marketplaces require a valid GSTIN before activating your seller account.
Yes. If your turnover falls below the threshold or you close your business, apply for cancellation on the GST portal. Before the registration is closed you must file a final return (GSTR-10) within 3 months of the cancellation order date.
Knowledge Center
GST Compliance Guides
📘 Guide
GST Rate Classification with HSN Codes — 2026
Read →
⚖️ Comparison
GST Composition Scheme vs Regular Scheme
Read →
📊 Checklist
Monthly GST Compliance Checklist for Businesses
Read →
🔁 ITC
How to Maximise Input Tax Credit Legally
Read →
📅 Deadlines
GST Return Due Dates Calendar 2026
Read →
🛡️ Penalty
How to Avoid GST Penalties & Notices
Read →