GST Calculator: Tax Inclusive & Exclusive
Calculate GST-inclusive or exclusive prices for any rate — 5%, 12%, 18%, or 28%. Reverse GST calculation included.
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GST Calculator: Tax Inclusive & Exclusive A GST calculator has two modes: add GST to a base price, or extract the pre-tax price from a GST-inclusive total. A ₹1,000 item at 18% GST costs ₹1,180 inclusive. Reverse-calculating from ₹1,180 yields ₹1,000 base + ₹180 tax — the breakdown needed for invoicing and ITC claims. --- See our Complete Guide to Financial Calculators What Is GST and Why Does It Matter? GST (Goods and Services Tax) replaced India's fragmented indirect tax system on July 1, 2017. Before GST, a product could attract excise duty, VAT, CST, and service tax simultaneously — creating cascading (tax-on-tax) effects. GST eliminated this by applying a single rate at each transaction stage, with ITC (Input Tax Credit) preventing double taxation. India's GST is dual — CGST and SGST…
Frequently Asked Questions
What is GST?
GST (Goods and Services Tax) is India's unified indirect tax that replaced VAT, service tax, and excise duty. Implemented on July 1, 2017, GST applies at four main rates — 5%, 12%, 18%, and 28% — depending on the category of goods or services.
How do I calculate GST on a price?
To add GST to a base price: GST amount = Base price × (GST rate ÷ 100). Final price = Base price + GST amount. For ₹1,000 at 18% GST: GST = ₹180, final price = ₹1,180. For tax-exclusive pricing, multiply the base price by (1 + rate/100).
What is reverse GST calculation?
Reverse GST extracts the original price from a GST-inclusive total. Formula: Base price = Total price ÷ (1 + GST rate / 100). For a ₹1,180 invoice at 18% GST: base price = 1180 ÷ 1.18 = ₹1,000. This is essential when you receive a GST-inclusive price and need to report base value and tax separately.
What are the GST slabs in India?
India's 2026 GST structure has four main slabs: 5% (essential goods, food items, some transport), 12% (processed foods, computers, business class air travel), 18% (most services, electronics, construction materials), and 28% (luxury goods, automobiles, tobacco, aerated drinks). A 0% rate applies to exempted goods.
How is input tax credit calculated?
Input tax credit (ITC) allows businesses to offset GST paid on purchases against GST collected on sales. If you paid ₹18,000 GST on inputs and collected ₹36,000 GST on sales, your net GST payable is ₹18,000. ITC eligibility depends on the nature of the purchase and proper documentation.
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