GST (Goods and Services Tax)
GST (Goods and Services Tax)
GST — Goods and Services Tax — is India's single, unified indirect tax applied on the supply of goods and services across the country. It was introduced on 1st July 2017, replacing a complex, multi-layered system of over 17 central and state taxes including VAT, Service Tax, Central Excise Duty, Octroi, and Entertainment Tax. Before GST, a product could be taxed at multiple stages by different authorities, leading to a cascading "tax on tax" effect that inflated prices and created compliance headaches for businesses operating across states.
GST is levied at every stage of the supply chain — from manufacturer to wholesaler to retailer — but the tax burden ultimately falls on the end consumer. Businesses registered under GST collect the tax on behalf of the government and can offset the tax they have already paid on their inputs through a mechanism called Input Tax Credit (ITC). This removes cascading and ensures only the value added at each stage is taxed.
For Indian freelancers, service providers, and small businesses, GST is the most important tax compliance requirement after income tax. Understanding how GST works — which type applies to your invoice, what rate to charge, which returns to file, and by when — is essential for getting paid correctly and avoiding penalties.
Quick reference
| Full form | Goods and Services Tax |
| Introduced | 1st July 2017 (GST Day) |
| Governed by | CGST Act 2017, IGST Act 2017, respective State GST Acts |
| Types | CGST, SGST, IGST, UTGST |
| GST rate on professional/IT services | 18% |
| GST slabs (post GST 2.0, effective Sept 2025) | 0%, 5%, 18%, 40% |
| Registration threshold — services (normal states) | ₹20 lakh annual turnover |
| Registration threshold — goods (normal states) | ₹40 lakh annual turnover |
| Registration threshold — NE/special category states | ₹10 lakh (services), ₹20 lakh (goods) |
| Composition scheme limit | ₹1.5 crore (goods), ₹50 lakh (services) |
| GSTR-1 monthly due date | 11th of the following month |
| GSTR-3B monthly due date | 20th of the following month |
| GSTR-9 annual return due date | 31st December of the following financial year |
| Late fee for GSTR-3B | ₹50/day (₹20/day for nil returns), maximum ₹10,000 |
| Interest on late GST payment | 18% per annum from the due date |
What GST replaced
Before GST, businesses in India navigated a maze of indirect taxes levied by both the central and state governments. The same product could attract multiple taxes at different stages, and each state had different rates, making inter-state business complicated and expensive.
Central taxes replaced by GST
- Central Excise Duty
- Service Tax
- Central Sales Tax (CST)
- Additional Customs Duty (Countervailing Duty)
- Special Additional Duty of Customs
State taxes replaced by GST
- VAT (Value Added Tax)
- State Excise Duty (on some goods)
- Octroi and Entry Tax
- Entertainment Tax
- Luxury Tax
- Advertisement Tax
GST unified these into a single tax, creating a true common market across India's 28 states and 8 union territories. A retailer in Tamil Nadu buying from a manufacturer in Gujarat now pays one tax (IGST) instead of navigating separate CST, VAT, and entry tax rules.
Three types of GST: CGST, SGST, and IGST
India operates a dual GST structure — the central government and state governments both levy GST simultaneously. Which type applies depends on where the buyer and seller are located.
| Type | Full form | Who levies it | When it applies | Where the revenue goes |
|---|---|---|---|---|
| CGST | Central Goods and Services Tax | Central Government | Intra-state transactions (buyer and seller in same state) | Central Government |
| SGST | State Goods and Services Tax | State Government | Intra-state transactions (buyer and seller in same state) | State Government |
| IGST | Integrated Goods and Services Tax | Central Government | Inter-state transactions + imports | Split between Centre and destination state |
| UTGST | Union Territory GST | Union Territory administration | Intra-UT transactions (UTs without legislature) | Union Territory |
Intra-state: CGST + SGST
When a freelancer in Bengaluru (Karnataka) raises an invoice to a client in Bengaluru (Karnataka), both CGST and SGST apply. For a service taxable at 18%: CGST = 9% and SGST = 9%.
Inter-state: IGST
When the same freelancer in Bengaluru raises an invoice to a client in Mumbai (Maharashtra), only IGST applies at the total rate of 18%. IGST is later apportioned between the Centre and Maharashtra.
Export of services: zero-rated
When the freelancer invoices a client in the United States, the supply qualifies as an export of services. GST is zero-rated — 0% is charged. The freelancer typically files a Letter of Undertaking (LUT) to raise zero-GST invoices without paying IGST upfront.
GST rates in India 2026
India's GST Council completed a major simplification in September 2025 — known as GST 2.0 — that reduced the number of rate slabs. The current rate structure has four primary slabs:
| Rate | What it covers | Examples |
|---|---|---|
| 0% (Nil) | Essential goods and services, basic food items | Fresh vegetables, milk, eggs, rice, wheat, books, educational services |
| 5% | Essential goods and healthcare | Edible oil, sugar, tea, coffee, medicines, packaged food, transport services |
| 18% | Most goods and all professional/IT services | Electronics, FMCG goods, restaurants, IT services, consulting, design, legal, accounting |
| 40% | Sin goods and luxury items | Tobacco, aerated drinks, luxury cars, casinos, online gaming |
For freelancers and service professionals: Almost every professional service — IT development, design, consulting, writing, legal, accounting — attracts 18% GST. This means for every ₹1,00,000 you invoice, you collect ₹18,000 as GST and pay it to the government (after offsetting eligible ITC).
Who must register for GST
Not everyone is required to register. The obligation depends on your annual turnover and the nature of your business.
Threshold-based registration
| Business type | Normal states threshold | Special category states threshold |
|---|---|---|
| Service providers (freelancers, consultants) | ₹20 lakh | ₹10 lakh |
| Goods suppliers (traders, manufacturers) | ₹40 lakh | ₹20 lakh |
Key special category states include Manipur, Mizoram, Nagaland, and Tripura (₹10 lakh for services). Other northeastern and hilly states have ₹20 lakh thresholds.
Mandatory registration regardless of turnover
Some businesses must register for GST even if their turnover is below the threshold:
- Exporters of services (freelancers with foreign clients) — mandatory regardless of income
- Inter-state suppliers — even ₹1 of inter-state sales triggers registration
- E-commerce sellers (selling on Amazon, Flipkart, Meesho, etc.)
- Casual taxable persons (businesses operating temporarily in a different state)
- Non-resident taxable persons
- Businesses required to deduct TDS under GST
- Input Service Distributors (ISDs)
Important for freelancers: If you have even one foreign client and your service qualifies as an export, you must register for GST regardless of how much you earn. Many freelancers earning ₹5–10 lakh/year from a single international client are technically required to be GST-registered.
How GST works on an invoice: two examples
Example 1: Intra-state (same state)
Suresh, a web designer in Hyderabad (Telangana), invoices a client in Hyderabad for ₹50,000.
| Item | Amount |
|---|---|
| Design services | ₹50,000 |
| CGST @ 9% | ₹4,500 |
| SGST @ 9% | ₹4,500 |
| Total invoice | ₹59,000 |
Suresh collects ₹59,000 from the client. He deposits ₹4,500 as CGST to the central government and ₹4,500 as SGST to the Telangana government (offset by any eligible ITC).
Example 2: Inter-state (different states)
Same Suresh in Hyderabad (Telangana) invoices a client in Pune (Maharashtra) for ₹50,000.
| Item | Amount |
|---|---|
| Design services | ₹50,000 |
| IGST @ 18% | ₹9,000 |
| Total invoice | ₹59,000 |
The total GST amount is the same (₹9,000), but Suresh pays it as IGST to the central government. The Centre then transfers the state's share to Maharashtra.
Input Tax Credit (ITC): how GST avoids double taxation
ITC is the mechanism that prevents tax-on-tax by allowing registered businesses to offset the GST they paid on purchases against the GST they collect on sales.
Simple example:
- Priya buys design software (licensed SaaS tool) and pays ₹18,000 including 18% GST (₹2,745 GST on ₹15,254 base).
- She raises an invoice to her client for ₹1,00,000 + 18% GST = ₹1,18,000.
- Instead of paying the full ₹18,000 GST she collected, she deducts the ₹2,745 she already paid and pays only ₹15,255 net GST to the government.
ITC eligibility conditions
To claim ITC, all of the following must be true:
- You are registered under GST
- You have a valid Tax Invoice from your supplier with their GSTIN
- Your supplier has filed their GSTR-1 and the invoice appears in your GSTR-2B
- You have received the goods or services
- You have paid your supplier (including GST) within 180 days of the invoice date
- The goods or services are used for business purposes (not personal use)
Critical: If your supplier has not filed their GSTR-1 or has not paid their tax, your ITC will not appear in GSTR-2B — and you cannot claim it. This is why, for B2B clients, receiving a proper GST-compliant Tax Invoice from every vendor is essential.
GST returns: what to file and when
Every GST-registered business must file returns periodically, reporting their sales, purchases, and tax liability.
For regular taxpayers (monthly)
| Return | What it covers | Due date |
|---|---|---|
| GSTR-1 | All outward supplies (sales invoices) | 11th of the following month |
| GSTR-3B | Summary return + tax payment | 20th of the following month |
| GSTR-9 | Annual return (if turnover > ₹2 crore) | 31st December of following FY |
| GSTR-9C | Reconciliation statement (turnover > ₹5 crore) | 31st December of following FY |
For QRMP scheme taxpayers (quarterly filing, monthly payment)
The QRMP (Quarterly Return Monthly Payment) scheme is available for businesses with annual turnover up to ₹5 crore. They file GSTR-1 and GSTR-3B quarterly but pay estimated tax monthly via Form PMT-06.
| Return / Form | Due date |
|---|---|
| GSTR-1 (quarterly) | 13th of the month following the quarter |
| GSTR-3B (quarterly) | 22nd or 24th of the month following the quarter |
| PMT-06 (monthly payment) | 25th of every month |
Penalties for late filing
| Return | Late fee | Interest |
|---|---|---|
| GSTR-1, GSTR-3B | ₹50/day (₹20/day for nil returns), max ₹10,000 | 18% p.a. on unpaid tax |
| GSTR-9 (annual) | ₹200/day, max 0.25% of turnover | — |
Late fees must be paid in cash — they cannot be offset using ITC.
Composition Scheme: simplified GST for small businesses
The Composition Scheme is an optional simplified GST option for small businesses. Instead of regular GST compliance (collecting 18%, filing monthly returns, maintaining detailed records), they pay a small flat rate on their turnover and file returns quarterly.
| Business type | Turnover limit | Tax rate |
|---|---|---|
| Manufacturers (most goods) | Up to ₹1.5 crore | 1% of turnover |
| Traders / retailers | Up to ₹1.5 crore | 1% of turnover |
| Restaurants (not serving alcohol) | Up to ₹1.5 crore | 5% of turnover |
| Service providers | Up to ₹50 lakh | 6% of turnover |
Key limitations of the Composition Scheme:
- Cannot collect GST from customers (the tax comes from your own pocket)
- Cannot claim Input Tax Credit
- Cannot supply goods outside your state (inter-state restriction)
- Cannot issue a Tax Invoice — must issue a "Bill of Supply" instead
- Not available to exporters or e-commerce sellers
To opt in, file Form CMP-02 on the GST portal by 31st March before the financial year in which you want to use the scheme.
GST for freelancers and service providers
For Indian freelancers and independent professionals, GST touches every invoice they raise. Here is a summary of the key rules:
GST rate: 18% on all professional and IT services.
Registration: Mandatory once annual income exceeds ₹20 lakh from domestic clients, or from the first rupee of export income.
Invoice format: Must issue a Tax Invoice with GSTIN, SAC code, and CGST/SGST or IGST amounts. Non-compliant invoices cannot be used for ITC by your client.
Intra-state vs inter-state: If your client is in the same state as you, charge CGST + SGST (9% + 9%). If in a different state, charge IGST (18%).
Foreign clients: Zero-rated if export conditions are met. File a Letter of Undertaking (LUT) to raise zero-GST invoices. Collect FIRC as proof of foreign exchange receipt.
Returns: File GSTR-1 by the 11th and GSTR-3B by the 20th of every month. If your turnover is under ₹5 crore, consider the QRMP scheme for quarterly filing.
ITC for your clients: If you are registered and issue proper Tax Invoices, your B2B clients can claim ITC on your invoices. This is a key reason many businesses prefer to work with GST-registered freelancers.
Common GST mistakes Indian businesses make
Charging CGST + SGST on an inter-state invoice. If your client is in a different state, IGST applies — not CGST + SGST. Charging the wrong type forces your client to do corrections and delays ITC.
Not registering despite having foreign clients. Freelancers with foreign clients must register for GST regardless of income. Many avoid this assuming they are exempt because they earn below ₹20 lakh — they are not.
Missing GSTR-1 filing. If you do not file GSTR-1 on time, your invoices do not appear in your clients' GSTR-2B. This means your clients cannot claim ITC on your invoices — something they will not be happy about.
Not filing a nil GSTR-3B. Even if you had no transactions in a month, you must file a nil GSTR-3B by the 20th. Failing to do so attracts ₹20/day late fee and can lead to system-generated notices.
Using "Tax Invoice" heading without GST registration. Only registered taxpayers can issue Tax Invoices. If you are not registered, use "Invoice" or "Bill of Services." Issuing a Tax Invoice without registration is an offence under the GST Act.
Claiming ITC on personal expenses. ITC is only available for inputs used for business purposes. Internet bills, phone bills used partly for personal use must be partially reversed. ITC on cars, food and beverages, and membership fees is specifically blocked.
Not paying suppliers within 180 days. If you have claimed ITC on an invoice but have not paid the supplier within 180 days, you must reverse the ITC with interest. Always track supplier payment timelines if you have claimed ITC.
Not reconciling GSTR-2B with purchase records. ITC in GSTR-3B must match GSTR-2B. Claiming ITC on invoices that do not appear in your GSTR-2B is a common reason for GST notices.
Frequently asked questions
What is GST in India?
GST stands for Goods and Services Tax. It is India's unified indirect tax on the supply of goods and services, introduced on 1st July 2017. It replaced over 17 central and state taxes including VAT, Service Tax, and Central Excise Duty. It is administered through three components: CGST (collected by the Centre), SGST (collected by the state), and IGST (collected by the Centre on inter-state transactions and exports).
What is the full form of GST?
GST stands for Goods and Services Tax.
What are the GST rates in India in 2026?
Following the GST 2.0 reforms effective September 2025, India has four primary GST slabs: 0% for essential goods and services, 5% for essential consumer goods and healthcare, 18% for most goods and all professional services, and 40% for sin goods and luxury items. Professional services including IT, consulting, design, and legal work are all taxed at 18%.
Who needs to register for GST in India?
Service providers must register for GST if their annual turnover exceeds ₹20 lakh (₹10 lakh in special category states). Goods suppliers must register above ₹40 lakh. However, registration is mandatory regardless of turnover for exporters of services, inter-state suppliers, e-commerce sellers, and certain other categories. Freelancers with even one foreign client must register for GST.
What is the difference between CGST, SGST, and IGST?
CGST and SGST are charged together on intra-state transactions (buyer and seller in the same state) — each at half the total rate. IGST is charged on inter-state transactions (buyer and seller in different states) at the full rate. For a service taxed at 18%: intra-state means 9% CGST + 9% SGST; inter-state means 18% IGST. The total tax paid by the buyer is the same in both cases.
What is Input Tax Credit under GST?
Input Tax Credit (ITC) allows a GST-registered business to deduct the GST it paid on purchases from the GST it collects on sales. This eliminates the cascading "tax on tax" effect. To claim ITC, you must have a valid Tax Invoice from the supplier, the invoice must appear in your GSTR-2B, you must have received the supply, and you must have paid the supplier within 180 days.
What are the GST returns a freelancer must file?
A GST-registered freelancer must file GSTR-1 (outward supplies) by the 11th of every month and GSTR-3B (summary return and tax payment) by the 20th of every month. If their annual turnover is below ₹5 crore, they can opt for the QRMP scheme and file quarterly returns while paying tax monthly via Form PMT-06. An annual return GSTR-9 is required if turnover exceeds ₹2 crore.
What happens if I do not register for GST even though I should?
Failing to register for GST when mandatory attracts a penalty of 10% of the tax due, subject to a minimum of ₹10,000. In cases of deliberate tax evasion, the penalty can be 100% of the tax due. Additionally, interest at 18% per annum is charged on the tax that should have been collected from the date registration was required. Voluntary registration after the fact is always better than being caught.
Related terms
GSTIN · CGST · SGST · IGST · Input Tax Credit · GSTR-1 · GSTR-3B · Tax Invoice · HSN Code · SAC Code · Composition Scheme · Place of Supply · LUT · Due Date
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