🧾 GST Tools
GST Calculators India 2025
Everything you need for GST — add tax, remove tax, generate invoices, calculate ITC, and compare Composition Scheme. Free, no login, built for Indian businesses.
5 Free Tools
0%–28% All GST Slabs
0 Login Required
All GST Tools
Pick your GST calculator
Every tool updated for current GST rules. Results instant, calculations in your browser.
Free
GST Calculator
Add GST to a base amount or remove GST from an inclusive price. CGST + SGST or IGST breakup. All 5 slabs. Live result as you type.
Free
GST Reverse Calculator
Find the original base price from any GST-inclusive amount. Shows base price at all 4 other slabs simultaneously — useful for pricing decisions.
New
GST Invoice Generator
Generate a professional GST tax invoice with multiple line items, HSN/SAC codes, buyer/seller GSTIN, and bank details. Download free PDF — client ready.
Free
Composition Scheme Calculator
Compare Composition Scheme tax vs Regular GST. See annual savings for traders (1%), manufacturers (2%), restaurants (5%), and service providers (6%).
Free
ITC Calculator
Calculate Input Tax Credit on goods, services, and capital goods. Net GST payable after ITC set-off, or carry-forward amount. Blocked credits Sec 17(5) handled.
GST Slabs in India 2025
| GST Rate | Category | Examples |
|---|---|---|
| 0% | Essential goods | Raw food, milk, eggs, fresh vegetables, educational books |
| 5% | Basic necessities | Packaged food, coffee, tea, domestic LPG, economy class air travel |
| 12% | Standard goods | Processed food, butter, cheese, mobile phones, business class travel |
| 18% | Most goods & services | IT services, restaurants, AC hotels, electronics, capital goods |
| 28% | Luxury & sin goods | Cars, SUVs, tobacco, aerated drinks, premium hotels, casinos |
GST Calculation — How It Works
Adding GST (Forward Calculation)
GST Amount = Base Price × Rate ÷ 100
Total = Base Price + GST Amount
For intra-state: CGST = SGST = GST ÷ 2
For inter-state: Full amount as IGST
Removing GST (Reverse Calculation)
Base Price = Inclusive Amount ÷ (1 + Rate ÷ 100)
GST Amount = Inclusive Amount − Base Price
Use this when you know the MRP or invoice total and need to find the pre-tax price.
Input Tax Credit (ITC)
Net GST Payable = Output GST (on sales) − Eligible ITC (on purchases)
ITC cannot be claimed on blocked credits under Sec 17(5): personal vehicles, food, club memberships, construction.
Composition Scheme
Instead of regular GST, pay a flat % of turnover. Cannot claim ITC. Cannot make inter-state supplies. Eligible if turnover ≤ ₹1.5 Cr (goods) or ₹50L (services).
Frequently Asked Questions — GST
GST (Goods and Services Tax) is a unified indirect tax on the supply of goods and services across India. It replaced VAT, service tax, excise duty, and several other taxes from July 2017. GST is collected at each stage of the supply chain, with businesses claiming credit for tax paid on inputs (ITC), ensuring the final tax burden falls only on the end consumer.
For intra-state transactions (buyer and seller in same state), GST is split equally into CGST (Central GST) and SGST (State GST). For inter-state transactions, the full GST is charged as IGST (Integrated GST), which is later apportioned between the Centre and destination state. For example, at 18% GST on an intra-state sale: CGST = 9%, SGST = 9%. On an inter-state sale: IGST = 18%.
GST registration is mandatory if your annual turnover exceeds ₹40 lakh (goods) or ₹20 lakh (services). For special category states (North-East, J&K, Himachal Pradesh, Uttarakhand), the threshold is ₹20 lakh (goods) and ₹10 lakh (services). Businesses making inter-state supplies, e-commerce sellers, and those liable to pay tax under reverse charge must register regardless of turnover.
ITC allows registered businesses to deduct the GST paid on business purchases from the GST collected on sales. Only the net amount is paid to the government. For example, if you collected ₹18,000 GST on sales and paid ₹12,000 GST on purchases, you pay only ₹6,000. ITC cannot be claimed on blocked credits under Section 17(5) such as personal motor vehicles, food, club memberships, and works contracts for immovable property.
The Composition Scheme suits small businesses with turnover under ₹1.5 crore (₹50 lakh for services) that sell mostly to end consumers (not other businesses). Benefits: lower tax rate, simpler compliance, quarterly filing. Drawbacks: cannot claim ITC, cannot make inter-state supplies, buyers cannot claim ITC on your supplies. Use our Composition Scheme Calculator to compare your actual tax under both options.