Yes, this GST calculator is 100% free to use with absolutely no hidden charges, subscription fees, or premium features. You can perform unlimited GST calculations for any amount and any GST rate without creating an account or signing up. Every feature including CGST/SGST/IGST breakdown, intra-state and inter-state calculations, bulk calculation mode, and copy-to-clipboard functionality is available at no cost. The tool is free forever as part of our mission to provide accessible financial tools for Indian businesses and professionals.

Your data is completely safe and private. This GST calculator runs entirely within your web browser using client-side JavaScript. Your transaction amounts, pricing details, and business information are never transmitted to any server, never stored in any database, and never shared with any third party including tax authorities. There are no cookies, no local storage, no tracking mechanisms, and no analytics capturing your financial or business data. You can verify this by disconnecting from the internet after loading the page — the calculator continues to work perfectly offline.

This GST calculator provides mathematically precise results using standard GST computation formulas mandated by the Government of India. For GST-exclusive calculations, GST Amount = Base Price × GST Rate / 100. For GST-inclusive calculations, Base Price = Total Price × 100 / (100 + GST Rate). The CGST and SGST are exactly half of the total GST for intra-state supply. Results are accurate to two decimal places (paisa level), matching what you would compute manually or find on official government portals. The calculator follows all current GST rules as per the CGST Act 2017.

GST (Goods and Services Tax) is a comprehensive indirect tax levied on the supply of goods and services in India, introduced on 1st July 2017 under the 101st Constitutional Amendment. It replaced multiple taxes including VAT, Service Tax, Excise Duty, and Octroi with a unified tax system. GST operates on a destination-based principle — tax is collected at the point of consumption. For intra-state transactions, GST is split equally into CGST (Central) and SGST (State). For inter-state transactions, IGST (Integrated GST) applies. The standard GST slab rates are 0%, 5%, 12%, 18%, and 28%, with a 3% rate for gold and precious metals.

India has five main GST slab rates: 0% (Nil) for essential items like fresh vegetables, milk, and flour; 5% for packaged food items, economy travel, and small restaurants; 12% for processed foods, business class travel, and branded garments above ₹1,000; 18% for most goods and services including IT services, financial services, and restaurants in hotels; 28% for luxury items like cars, tobacco, aerated drinks, and high-end electronics. Additionally, gold and precious metals attract 3% GST. Some items also have a Compensation Cess above 28% for luxury and demerit goods like SUVs and pan masala.

CGST (Central GST) is collected by the Central Government and SGST (State GST) is collected by the State Government — both apply on intra-state supplies (within the same state). They are equal halves of the total GST rate. For example, 18% GST on an intra-state sale splits into 9% CGST + 9% SGST. IGST (Integrated GST) is collected by the Central Government on inter-state supplies (across state borders) and imports. IGST equals the full GST rate. For an 18% GST inter-state transaction, the entire 18% is charged as IGST. The Central Government then settles the state's share.

To extract GST from an MRP or inclusive price, use the formula: Base Price = Total Price × 100 / (100 + GST Rate), and GST Amount = Total Price - Base Price. For example, if an item's MRP is ₹1,180 with 18% GST: Base Price = 1180 × 100 / 118 = ₹1,000 and GST = ₹180. In our calculator, simply select 'GST Inclusive' mode, enter ₹1,180, select 18% rate, and click Calculate. The tool automatically computes the base price and GST amount. This is essential for retailers who sell at MRP and need to know the tax component for their GST returns.

Yes, this calculator is extremely useful for GST invoice preparation. It provides the exact CGST, SGST, or IGST amounts you need to mention on your tax invoices. For intra-state supplies, you will get separate CGST and SGST values; for inter-state supplies, you get the IGST amount. Simply enter each line item's value, select the applicable GST rate and supply type, and use the calculated values directly on your invoice. Many small business owners, freelancers, and chartered accountants in India use our calculator for quick verification before finalizing invoices in their billing software.

GST registration is mandatory for businesses with annual turnover exceeding ₹40 lakhs for goods (₹20 lakhs for services, and ₹10 lakhs for special category states like the North-Eastern states). Additionally, registration is compulsory regardless of turnover for inter-state suppliers, e-commerce operators, casual taxable persons, non-resident taxable persons, persons required to deduct TDS/TCS, and input service distributors. Voluntary registration is available for businesses below the threshold who want to claim Input Tax Credit. Under the Composition Scheme, small businesses with turnover up to ₹1.5 crores can pay GST at reduced rates.

Input Tax Credit (ITC) is the GST paid on business purchases and expenses that can be claimed as a credit against the GST liability on sales. This mechanism prevents cascading taxation (tax on tax). For example, if a manufacturer pays ₹1,800 GST on raw materials and collects ₹3,600 GST on finished goods, they pay only ₹1,800 (3,600 - 1,800) to the government. ITC can be claimed only if you have a valid tax invoice, the goods/services are received, the supplier has filed their return, and the purchase is used for business purposes. Our calculator helps verify the GST components for ITC claims.

Regular GST taxpayers file GSTR-3B monthly (by 20th of the following month) and GSTR-1 monthly or quarterly depending on turnover. Businesses with turnover up to ₹5 crores can opt for quarterly GSTR-1 under the QRMP scheme. Annual return GSTR-9 is due by 31st December of the following year. Composition scheme dealers file CMP-08 quarterly and GSTR-4 annually. Our calculator helps you quickly verify GST amounts before filing, reducing errors that could lead to notices, penalties, or delayed ITC claims from the GST department.

Exports from India are treated as zero-rated supplies under GST, meaning they attract 0% GST. However, exporters have two options: export under a Letter of Undertaking (LUT) without paying IGST and claim refund of input taxes, or pay IGST on exports and claim refund of the IGST paid. Most exporters prefer the LUT route to avoid cash flow issues. For services exported to foreign clients, the same zero-rating applies provided the payment is received in convertible foreign exchange. This makes Indian exports competitive in the global market by removing embedded tax costs.

The GST Composition Scheme is a simplified tax scheme for small businesses with annual turnover up to ₹1.5 crores (₹75 lakhs for special category states). Under this scheme, businesses pay GST at reduced rates: 1% for manufacturers, 1% for traders, and 5% for restaurants. Service providers with turnover up to ₹50 lakhs can pay 6% GST. Benefits include simplified compliance with quarterly returns instead of monthly, and no need for detailed invoices. However, composition dealers cannot collect GST from customers, cannot claim ITC, and cannot make inter-state supplies.

GST is calculated on the actual transaction value after applying the discount, provided the discount is mentioned on the invoice and linked to the supply. For example, if an item worth ₹10,000 is sold at a 20% discount (₹2,000 off), GST at 18% applies on ₹8,000, giving ₹1,440 GST instead of ₹1,800. However, post-supply discounts not linked to specific invoices require reversal of ITC by the recipient. Trade discounts given at the time of supply are simply deducted before GST calculation. Our calculator helps compute GST on the discounted price — just enter the net amount after discount.

Under the Reverse Charge Mechanism, the recipient of goods or services pays the GST instead of the supplier. This applies in specific situations defined under Sections 9(3) and 9(4) of the CGST Act: purchases from unregistered dealers above prescribed limits, import of services, services by goods transport agencies, legal services by advocates, and services by directors to companies. Under RCM, the recipient must self-invoice, pay GST, and can claim ITC on the same. Our calculator can compute the GST amount payable under RCM — use the exclusive mode with the applicable rate.

Absolutely. Freelancers and consultants providing services above the ₹20 lakh threshold must charge 18% GST on their invoices. This calculator is perfect for computing the exact GST to add to your professional fees. For example, if your consulting fee is ₹50,000, add 18% GST to get ₹59,000 total. For intra-state clients, split as 9% CGST (₹4,500) + 9% SGST (₹4,500). For inter-state clients, charge 18% IGST (₹9,000). Many Indian freelancers on platforms like Upwork, Fiverr, and Toptal use our calculator for accurate invoice generation.