Free GST Calculator Online - Calculate CGST, SGST & IGST Instantly (2026)
Add or remove GST from any amount. Get CGST & SGST split for intra-state, or IGST for interstate transactions. Supports all GST 2.0 rate slabs.
GST Calculator
† Legacy slabs (12%, 28%) abolished under GST 2.0 (Sept 2025) - shown for old invoice reference.
Enter an amount to calculate GST
Essentials (0%) - GST 2.0
Fresh milk, bread, eggs, vegetables, fruits, salt, educational services, healthcare, unbranded food
Basic goods (5%) - GST 2.0
Packaged food, sugar, tea, coffee, medicines, life insurance, economy class air tickets, solar panels
Standard / Services (18%) - GST 2.0
AC restaurants, telecom, IT & software services, TVs, ACs, refrigerators, hotels above ₹7500, most business services, banking, consulting
Luxury (40%) - GST 2.0
Tobacco, cigarettes, aerated drinks, casinos, luxury cars, lottery, pan masala, sin goods
Legacy: Standard goods (12%) - Pre-2025
[Old slab - abolished Sept 2025] Butter, ghee, fruit juice, notebooks, mobile phones, business class air tickets, hotels ₹1001–₹7500
Legacy: Luxury (28%) - Pre-2025
[Old slab - abolished Sept 2025] Cars, motorcycles, tobacco, aerated drinks, 5-star hotels
Bill Calculator
Add multiple items with different GST rates
Add Item
| # | Item | Price | Qty | Base | Rate | CGST | SGST | IGST | Total | |
|---|---|---|---|---|---|---|---|---|---|---|
| No items yet. Add your first item above. | ||||||||||
GST Slab Quick Reference
Essentials (0%) - GST 2.0
Fresh milk, bread, eggs, vegetables, fruits, salt, educational services, healthcare, unbranded food
Basic goods (5%) - GST 2.0
Packaged food, sugar, tea, coffee, medicines, life insurance, economy class air tickets, solar panels
Standard / Services (18%) - GST 2.0
AC restaurants, telecom, IT & software services, TVs, ACs, refrigerators, hotels above ₹7500, most business services, banking, consulting
Luxury (40%) - GST 2.0
Tobacco, cigarettes, aerated drinks, casinos, luxury cars, lottery, pan masala, sin goods
Legacy: Standard goods (12%) - Pre-2025
[Old slab - abolished Sept 2025] Butter, ghee, fruit juice, notebooks, mobile phones, business class air tickets, hotels ₹1001–₹7500
Legacy: Luxury (28%) - Pre-2025
[Old slab - abolished Sept 2025] Cars, motorcycles, tobacco, aerated drinks, 5-star hotels
100% Free & 100% Private
All processing happens entirely in your browser. We never upload your data to any server. No signup, no account, no hidden fees. Just free, secure tools.
How to Use?
- Add GST: Enter the base price and select a rate (e.g., 18%). We'll add the tax to give you the total.
- Remove GST: Choose "Remove GST", enter the final bill amount, and we'll calculate the original pre-tax price.
- Intra vs Inter-state: Toggle between Intra-state (CGST + SGST) and Inter-state (IGST) - the breakdown updates instantly.
- Multi-Item Bill: Use the table below the calculator to add multiple products with different rates and get a grand total.
Selling Across States? Use IGST
When buyer and seller are in different states, CGST + SGST is replaced by a single IGST (Integrated GST) charge. The full tax amount goes to the central government, and Input Tax Credit flows seamlessly across state lines.
Toggle to "Inter-state (IGST)" in our calculator to handle cross-state transactions. Common use cases: e-commerce sellers shipping nationwide, exporters, and service providers with clients in other states.
GST 2.0 Rate Changes (Effective September 22, 2025)
The GST Council overhauled India's tax structure on September 22, 2025. The old slabs of 12% and 28% have been abolished. The new rate structure under GST 2.0 is:
Essentials - fresh food, healthcare, education
Basic goods - packaged food, medicines, economy travel
Standard - most services, electronics, IT, telecom
Luxury - tobacco, aerated drinks, casinos, luxury goods
Note: Legacy rates 12% and 28% remain selectable in our calculator for invoices referencing pre-Sept 2025 transactions.
Features
Reverse GST Calculation
Easily find the actual base cost of a product by removing the included GST amount from the total price.
CGST & SGST Split
Automatically splits total GST into Central and State GST for intra-state billing.
Interstate IGST
Handles cross-state transactions by computing the full IGST amount instead of CGST/SGST split.
GST 2.0 Rate Presets
Quick presets for new 0%, 5%, 18%, 40% slabs. Legacy 12% & 28% buttons retained for old invoices.
Multi-Item Bill Table
Create a mini-invoice with multiple items, each with different GST rates and transaction types.
Printable Invoice Preview
Preview and print a formatted GST invoice directly from your browser - no sign-up needed.
Formulas Used
Adding GST (Exclusive → Inclusive):
GST Amount = (Original Cost × GST%) / 100
Net Price = Original Cost + GST Amount
Removing GST (Inclusive → Exclusive):
Original Cost = Total Price / (1 + (GST% / 100))
GST Amount = Total Price - Original Cost
CGST / SGST Split (Intra-state):
CGST = GST Amount / 2 | SGST = GST Amount / 2
Frequently Asked Questions
How to add GST to a price?
To add GST to a price, multiply the base amount by the GST percentage and divide by 100. Then add this GST amount to the base price. Formula: GST Amount = (Base Price × GST%) ÷ 100; Total = Base Price + GST Amount. Our calculator does this instantly - just enter the amount and select your rate.
How to remove GST from a total amount?
To remove GST (reverse calculation), divide the total inclusive amount by (1 + GST%/100). Formula: Base Price = Total ÷ (1 + GST%/100); GST Amount = Total − Base Price. Select 'Remove GST' mode in our calculator and enter the final bill amount.
What is CGST and SGST?
CGST (Central GST) and SGST (State GST) apply to intra-state transactions - when buyer and seller are in the same state. The total GST is split equally: half goes to the central government (CGST) and half to the state government (SGST). For example, 18% GST becomes 9% CGST + 9% SGST.
What is IGST and when is it used?
IGST (Integrated GST) applies to inter-state transactions - when the buyer and seller are in different states, or when importing goods. The entire GST amount goes to the central government as IGST. For example, if you sell goods from Maharashtra to Delhi with 18% GST, the full 18% is charged as IGST. Our calculator's 'Inter-state' toggle handles this automatically.
What are the new GST 2.0 rates effective September 2025?
Under GST 2.0, effective September 22, 2025, the GST Council overhauled the rate structure. The new slabs are: 0% (essentials like food, healthcare), 5% (basic goods, packaged food, medicines), 18% (most services, electronics, IT, telecom), and 40% (luxury goods, tobacco, aerated drinks, casinos). The old 12% and 28% slabs have been abolished under the new structure.
What GST rate applies to services in India?
Most services in India under GST 2.0 are taxed at 18%, including IT services, telecom, consulting, banking, insurance (excluding life insurance), and AC restaurants. Some services like healthcare and educational services remain at 0%. Certain financial services and insurance may have specific rates - always verify the HSN/SAC code for your specific service.
Do freelancers need to pay GST in India?
Yes, if a freelancer's annual turnover exceeds ₹20 lakh (₹10 lakh for special category states), GST registration is mandatory. The applicable rate for most freelance services (consulting, software, design) is 18% under IGST for international clients or CGST+SGST for domestic clients. Freelancers earning below the threshold can register voluntarily. Our calculator helps you quickly determine the GST amount to charge on your invoices.
What is reverse charge mechanism (RCM) under GST?
Under the Reverse Charge Mechanism (RCM), the liability to pay GST shifts from the supplier to the recipient of goods or services. RCM applies in specific scenarios: purchases from unregistered dealers (above threshold), import of services, and specific notified goods/services. The buyer must self-assess and pay the GST directly to the government, not to the supplier.
How is GST calculated on a multi-item invoice?
On a multi-item invoice, GST is calculated separately for each line item based on its applicable rate and transaction type. The total GST is the sum of individual item taxes. Our Bill Calculator lets you add multiple items with different GST rates and transaction types (intra/inter-state), automatically computing CGST, SGST, IGST, and a grand total.
What is the difference between GST inclusive and exclusive pricing?
GST-exclusive pricing (also called 'Add GST' mode) means the listed price does not include tax - GST is added on top. GST-inclusive pricing means the listed price already includes GST, and you need to extract the base price. Use 'Add GST' when quoting prices to clients, and 'Remove GST' to find the pre-tax cost from a GST-inclusive MRP.
Related Tools
Percentage Calc
Calculate marks %, shopping discounts, % increase, and profit/loss margins instantly.
EMI Calculator
Calculate home, car, or personal loan EMIs instantly. Get complete repayment schedules and interest breakdowns.
Age Calculator
Calculate exact age, next birthday countdown, and total time lived stats.
SIP Calculator
Calculate your SIP returns and maturity amount with monthly investment, expected return rate, and tenure.
Compound Interest Calculator
Calculate compound interest, total maturity amount, and interest earned with support for multiple compounding frequencies.
BMI Calculator
Calculate your Body Mass Index instantly. Enter height and weight to find your BMI, category, and healthy weight range.