GST Calculator India
Calculate Goods and Services Tax inclusive and exclusive amounts with instant CGST, SGST, and IGST breakdowns.
How is GST Calculated (Exclusive vs. Inclusive)?
Goods and Services Tax (GST) is calculated under two pricing models: For GST-exclusive prices, GST = (Base Amount × Rate) ÷ 100, and Total = Base + GST. For GST-inclusive (MRP) prices, Base Amount = (Total × 100) ÷ (100 + Rate), and GST = Total − Base Amount. Taxes split equally into CGST and SGST for intra-state sales, or 100% IGST for inter-state sales.
- GST Exclusive: Add tax on top of your transaction base value (common for B2B commercial invoices).
- GST Inclusive / Reverse MRP: Extract the hidden tax component embedded within retail consumer MRP prices.
- Tax Split: Intra-state supply splits 50:50 into CGST (Central) and SGST (State); inter-state supply levies IGST (Integrated).
Calculation Parameters
Standard services & electronics: IT software, telecom, consulting, gadgets, and consumer goods.
Revenue split 50/50 between Central (CGST) and State (SGST).
Eleven Thousand Eight Hundred Rupees Only
GST Component Breakdown
18% SlabGST Rates & HSN Code Finder (Top 50 Items)
Search by item name, HSN code, or tax slab. Click “Apply Rate” to test any rate in the calculator above.
| Item / Commodity | HSN / SAC | Category | GST Rate | Calculator Action |
|---|---|---|---|---|
Mobile Phones & SmartphonesAll cellular & smart mobile devices | 8517 | Electronics | 18% | |
Laptops, Desktops & TabletsAutomatic data processing machines | 8471 | Electronics | 18% | |
Televisions (Smart TVs / LED)Up to 32 inches: 18%; above 32 inches: 28% | 8528 | Electronics | 18% | |
Headphones, Earphones & SpeakersAudio accessories & microphones | 8518 | Electronics | 18% | |
Chargers, Power Banks & CablesStatic converters & charging adapters | 8504 | Electronics | 18% | |
Air Conditioners (ACs)Luxury home appliance slab | 8415 | Electronics | 28% | |
Gold Jewelry, Ornaments & CoinsSpecial 3% statutory precious metal slab | 7113 | Jewelry | 3% | |
Silver Articles & Bullion3% statutory bullion slab | 7106 | Jewelry | 3% | |
Jewelry Making Charges (Job Work)Job work on gold/gemstones billed separately | 9988 | Jewelry | 5% | |
Cut & Polished DiamondsSpecial concessionary 1.5% slab | 7102 | Jewelry | 1.5% | |
Rough Industrial DiamondsSpecial import 0.25% slab | 7102 | Jewelry | 0.25% | |
Fresh Vegetables & Fruits (Unbranded)Zero tax / exempt daily staple | 0701 | Food | 0% | |
Fresh Milk & Unpackaged CurdUnpackaged fresh dairy products | 0401 | Food | 0% | |
Pre-packaged & Labeled Rice/AttaPre-packaged pulses, flour, rice | 1001 | Food | 5% | |
Tea, Coffee & SpicesBranded packaged tea & coffee beans | 0902 | Food | 5% | |
Edible Cooking OilsMustard, sunflower, refined cooking oils | 1507 | Food | 5% | |
Packaged Biscuits, Cakes & SnacksProcessed confectionery & bakery goods | 1905 | Food | 18% | |
Chocolates & Cocoa ProductsCocoa preparations & premium chocolates | 1806 | Food | 18% | |
Aerated Cold Drinks & Energy Drinks28% + 12% compensation cess | 2202 | Food | 28% | |
Garments & Apparel (Sale Price ≤ ₹1,000)Affordable clothing threshold | 6101 | Apparel | 5% | |
Garments & Apparel (Sale Price > ₹1,000)Standard branded clothing | 6101 | Apparel | 12% | |
Footwear & Shoes (Sale Price ≤ ₹1,000)Affordable footwear tier | 6401 | Apparel | 5% | |
Footwear & Shoes (Sale Price > ₹1,000)Branded shoes & leather footwear | 6401 | Apparel | 12% | |
Software Development & IT ServicesSaaS, coding, cloud hosting, IT consulting | 9983 | Services | 18% | |
Digital Marketing & AdvertisingSEO, Google/Meta ads, agency retainer | 9983 | Services | 18% | |
Legal & Advocate Services (Business B2B)Reverse Charge Mechanism (RCM) applies | 9982 | Services | 18% | |
CA, Auditing & Tax ConsultingAccounting & compliance advisory | 9982 | Services | 18% | |
Freelance Writing & Graphic DesignCreative & consulting services | 9983 | Services | 18% | |
Goods Transport Agency (GTA Logistics)5% without ITC; 12% with ITC | 9965 | Services | 5% | |
Restaurants & Dining (AC & Non-AC)5% flat without Input Tax Credit | 9963 | Hospitality | 5% | |
Hotel Room Tariff (≤ ₹7,500 / night)Mid-scale accommodation | 9963 | Hospitality | 12% | |
Hotel Room Tariff (> ₹7,500 / night)Luxury hotel accommodation with ITC | 9963 | Hospitality | 18% | |
Domestic Air Travel (Economy Class)Economy airline passenger transport | 9964 | Hospitality | 5% | |
Air Travel (Business / First Class)Premium airline cabin class | 9964 | Hospitality | 12% | |
Life-saving Drugs & FormulationsInsulin, vaccines, diagnostic test kits | 3004 | Healthcare | 5% | |
General Pharmaceuticals & SyrupsStandard over-the-counter & prescription drugs | 3004 | Healthcare | 12% | |
Medical Devices & Diagnostic ScannersThermometers, BP monitors, ultrasound | 9018 | Healthcare | 12% | |
Hospitalization & Doctor ConsultationsHealthcare clinical care is exempt | 9993 | Healthcare | 0% | |
Affordable Under-Construction Housing1% flat without ITC (carpet area limits apply) | 9954 | Real Estate | 1% | |
Under-Construction Residential Flats5% flat without ITC | 9954 | Real Estate | 5% | |
Cement (Portland & Pozzolana)Heavy construction material slab | 2523 | Real Estate | 28% | |
Steel TMT Bars & RodsStructural building reinforcement | 7214 | Real Estate | 18% | |
Paints, Enamels & VarnishesSurface coating & interior finishes | 3208 | Real Estate | 18% | |
Electric Vehicles (EV Cars & Scooters)Green mobility incentive slab | 8703 | Automotive | 5% | |
Motorcycles & Petrol ScootersStandard internal combustion two-wheelers | 8711 | Automotive | 28% | |
Commercial Trucks & Goods LorriesCommercial freight vehicles | 8704 | Automotive | 28% | |
Automobile Spare Parts & TyresVehicle components & replacement tyres | 8708 | Automotive | 28% |
Mastering GST Calculations in India: Formulas, Rules & Real-World Examples
Essential knowledge for business owners, accountants, e-commerce sellers, and consumers.
GST Reverse Calculator: Formula to Extract GST from MRP
When purchasing consumer goods in retail, the displayed price is almost always GST Inclusive (MRP). To calculate the actual base price and exact tax paid, you use the Reverse GST Formula:
Example: For an electronic gadget bought at ₹1,180 with 18% GST:
• Net Base = (1,180 × 100) ÷ 118 = ₹1,000
• GST Paid = ₹1,180 − ₹1,000 = ₹180 (₹90 CGST + ₹90 SGST).
Inter-State vs Intra-State GST: CGST, SGST & IGST
Under the Indian GST framework, taxation depends entirely on the Place of Supply relative to the supplier's location:
- Intra-State Supply (Same State): Tax is split equally into 50% Central GST (CGST) and 50% State GST (SGST) (or UTGST).
- Inter-State Supply (Different States): 100% Integrated GST (IGST) is charged by the Central Government and subsequently allocated to the destination state.
Key takeaway: The customer pays the exact same total tax (e.g. 18%), but the administrative division between Central and State governments changes.
Trade Discounts & Valuation (Section 15(3) of CGST Act)
A frequent compliance question is whether GST is calculated before or after discount. Under Section 15(3) of the CGST Act, 2017, any trade discount given before or at the time of supply and duly recorded on the invoice is deducted from the taxable value:
Post-supply discounts (like annual volume rebates) require a formal credit note under Section 34 of the Act.
Input Tax Credit (ITC) Practical Calculation Example
Input Tax Credit (ITC) eliminates the cascading “tax on tax” effect by allowing businesses to claim credit for GST paid on business purchases against their GST sales liability:
To claim ITC, the supplier must have filed their GSTR-1, and the invoice must reflect in the buyer's GSTR-2B.
- Statutory slabs modeled: 0%, 3% (gold/bullion), 5%, 12%, 18% (commercial standard), and 28%
- Trade discounts deducted from taxable value prior to tax calculation under Section 15(3) of CGST Act
- Intra-state transactions split tax equally into 50% CGST and 50% SGST
- Inter-state transactions apply 100% IGST
- Excludes compensation cess applicable to certain luxury/sin items (e.g. tobacco, aerated drinks)
- Inclusive mode uses reverse extraction formula: Base = Gross / (1 + Rate/100)
GST Tax Slabs & Place of Supply Fact Triples
Statutory tax slabs, CGST/SGST splitting mechanics, and reverse tax formulas.
- Statutory GST Tax Slabs
- Standard goods and services tax rates are codified into 0% (essential food/grain), 3% (gold, silver, gems), 5% (household essentials, transport), 12% (processed foods, business services), 18% (standard industrial & IT services), and 28% (automobiles, luxury goods).
- Intra-State vs Inter-State Tax Allocation
- Supplies within the same state require equal split: 50% Central GST (CGST) and 50% State GST (SGST). Inter-state supplies attract 100% Integrated GST (IGST).
- Statutory Reverse GST (MRP Split) Formula
- Where total invoice value is inclusive of GST, the taxable amount is calculated as: Taxable Base = (Total Amount × 100) / (100 + GST Rate), and GST Amount = Total Amount - Taxable Base.
Frequently Asked Questions
How to extract GST from MRP (Inclusive formula)?
To extract GST backwards from a Maximum Retail Price (MRP) or GST-inclusive total, use the reverse GST formula: Net Base Amount = (Total Gross Amount × 100) ÷ (100 + GST Rate), and GST Extracted = Total Gross Amount − Net Base Amount. For example, if an invoice or MRP is ₹1,180 with 18% GST: Net Base Amount = (1,180 × 100) ÷ 118 = ₹1,000, and GST extracted is ₹180 (split into ₹90 CGST and ₹90 SGST).
What is the difference between CGST, SGST, and IGST?
For intra-state transactions (seller and buyer within the same State/UT), GST is split equally into Central GST (CGST, 50%) and State/UT GST (SGST/UTGST, 50%). For inter-state transactions (seller and buyer in different States), 100% Integrated GST (IGST) is levied by the Central Government and subsequently apportioned to the destination consumer state. The total tax liability remains identical regardless of whether supply is intra-state or inter-state.
Is GST calculated before or after discount?
Under Section 15(3) of the Central Goods and Services Tax (CGST) Act, trade discounts recorded on the invoice are deducted before calculating GST. Tax is levied strictly on the net transaction value. For example, if an item has an MRP of ₹1,000 and a 10% trade discount (₹100) is provided on the invoice, 18% GST applies to the discounted taxable base of ₹900 (GST = ₹162, total = ₹1,062), not on ₹1,000.
What is the GST rate on gold in India?
Gold bars, coins, bullion, and jewelry attract a special statutory GST rate of 3% (HSN Code 7113). In addition, jewelry making charges (job work) attract 5% GST (SAC 9988) if billed separately. By contrast, rough industrial diamonds attract 0.25% GST, and cut and polished diamonds attract 1.5% GST.
What is the reverse GST formula and how does a reverse GST calculator work?
A reverse GST calculator extracts the original pre-tax value from a gross total price. The mathematical formula is: Net Amount = Gross Amount ÷ (1 + (GST Rate ÷ 100)). The tax component is Gross Amount − Net Amount. This reverse extraction is standard for consumer retail products where the price tag already includes tax.
How does Input Tax Credit (ITC) work with GST calculations?
Input Tax Credit (ITC) prevents cascading taxation by allowing registered businesses to offset the GST paid on inward purchases against the GST collected on outward sales. For example, if you purchase raw materials for ₹10,000 + 18% GST (₹1,800 ITC) and sell the finished goods for ₹15,000 + 18% GST (₹2,700 Output GST), you pay only the net difference of ₹900 (₹2,700 − ₹1,800) in cash to the government.
What are the standard GST slabs in India?
India operates primarily under four statutory GST slabs: 5% (essential goods, medicines, economy rail/air travel), 12% (processed foods, business computers, hotel rooms up to ₹7,500), 18% (standard rate for IT/telecom, commercial services, capital goods), and 28% (automobiles, air conditioners, aerated beverages, cement, luxury goods). In addition, special rates apply to precious metals (3% on gold/silver) and basic food staples are exempt (0%).
How to Use This Calculator
- 1
Enter the amount in the input field (this can be either the base amount or total amount depending on your calculation type).
- 2
Select the applicable GST rate from the four tax slabs: 5%, 12%, 18%, or 28% based on your product or service category.
- 3
Choose the calculation type: 'GST Exclusive' to add tax to the amount, or 'GST Inclusive' to extract tax from the total.
- 4
View the instant results showing Net Amount (before tax), GST Amount (tax value), and Total Amount (final price).
Key Terms & Definitions
- GST (Goods and Services Tax)
- A comprehensive indirect tax on the manufacture, sale, and consumption of goods and services throughout India, replacing multiple cascading taxes.
- Net Amount
- The base price of goods or services before adding GST. This is the taxable value on which GST is calculated.
- GST Amount
- The actual tax value calculated by applying the GST rate percentage to the net amount.
- GST Exclusive
- A pricing method where GST is added on top of the base price. The displayed price does not include tax.
- GST Inclusive
- A pricing method where GST is already included in the displayed price. Common in retail for consumer-facing prices.
- GSTIN
- GST Identification Number - a unique 15-digit number assigned to every taxpayer registered under GST in India.
Formulas & Calculations
GST Exclusive Calculation
When calculating GST exclusive, you start with the base price (net amount) and add the GST on top. For example, ₹1000 at 18% GST = ₹1000 + (₹1000 × 0.18) = ₹1,180 total.
GST Inclusive (Reverse) Calculation
When calculating GST inclusive, you extract the tax from the total amount. For example, ₹1,180 at 18% GST = ₹1,180 × 100 / 118 = ₹1,000 net, GST = ₹180.
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