Three calculation modes
Exclusive: taxable × (1 + rate) = invoice total. Inclusive/reverse: total ÷ (1 + rate) = taxable. Same math, different starting number.
Delhi B2B quotes usually show taxable plus GST; consumer apps show one inclusive figure.
GST Calculator India
Switch between adding GST to a taxable quote, or stripping GST from a Swiggy-style inclusive total—pick the slab that matches your HSN/SAC line.
Live GST calculation
GST Inclusive Calculator
Enter amount including GST. We extract taxable value and tax.
Enter values and GST rate to see your breakdown.
Standard rate
18.00%
Alternative slabs
5% / 12% / 18% / 28%
Combined example
18.00%
Slabs on one screen
0%, 5%, 12%, 18%, and 28% cover most retail. Gold may use 3%. Always confirm the rate on the supplier invoice before filing.
Chennai and Kolkata retailers use the same slabs but different state codes on invoices—reverse math is identical once the rate is confirmed.
CGST/SGST split after calculation
After reverse mode yields total GST, intra-state sales split equally into CGST and SGST. Inter-state supplies assign the full amount to IGST—pick the correct mode before filing GSTR-1.
CA firms training articled assistants use this calculator for quick slab checks before posting vouchers in Tally or Zoho Books with component-wise tax ledgers.
When to use each mode
Forward for quotes; reverse for receipts and marketplace deposits.
Switch slabs when the invoice shows 5% restaurant GST versus 18% professional services—default 18% is a starting point, not a universal rate.
- Exclusive mode adds GST to taxable quotes.
- Inclusive/reverse mode strips GST from gross totals.
- Confirm HSN/SAC slab before calculating.
Common use cases
- Shop counter quick check.
- Accountant training junior staff.
- Delhi B2B quote mode check.
Tips for accurate calculations
- Pick slab before calculating.
- Split CGST/SGST after reverse.
- Archive invoice PDFs.
- Forward vs reverse mode.
India tax rate categories
| Rate | Category | Examples |
|---|---|---|
| 28% (Luxury/Sin) | Luxury goods and sin taxes | Cars (mid/large), motorcycles (>350cc), cigarettes, aerated drinks, luxury hotels — often + cess |
| 18% (Standard) | Most goods and services | Electronics, manufactured goods, professional services, AC restaurants, telecom |
| 12% (Reduced) | Selected goods | Processed food, butter, cheese, apparel above ₹1,000, business-class air travel |
| 5% (Lower) | Essentials and basics | Packaged food, apparel up to ₹1,000, footwear up to ₹1,000, economy travel |
| 0% (Nil) | Necessities | Fresh food, milk, eggs, vegetables, bread, educational and healthcare services |
Bangalore SaaS
₹59,000 inclusive at 18%.
÷ 1.18
₹50,000 taxable
Taxable ₹50,000 | GST ₹9,000
Filing reminder
Calculator output supports bookkeeping—not a substitute for GSTR filing. Verify each slab against supplier invoice before posting Tally vouchers from calculator results.
Frequently asked questions
18% is the most common rate for services including IT, consulting, and professional fees.
Taxable value = Amount including GST ÷ (1 + rate/100). GST = Total − Taxable value.
India GST at a glance
Goods and Services Tax (GST) replaced multiple indirect taxes. Registered businesses charge GST on taxable supplies, file returns, and pass ITC to the next link. For everyday math, you need fast inclusive/exclusive conversions.
Common slabs
0% (exempt), 3% (gold), 5% (essentials), 12%, 18% (most services), 28% (luxury). Always confirm HSN/SAC on your invoice.