GST Calculator
Add or remove Goods and Services Tax (GST) with CGST/SGST split
How Does It Work?
Indian GST Calculator. Calculate inclusive and exclusive GST amounts across standard slabs (5%, 12%, 18%, 28%) with instant CGST and SGST bifurcation.
CGST and SGST are equal halves (50% each) of the total intrastate GST tax amount.
Real-World Worked Example
Billing a consulting service of ₹50,000 under the standard 18% GST slab for an intrastate client in the same state.
- •Base Amount: ₹50,000
- •GST at 18%: ₹50,000 × 0.18 = ₹9,000
- •CGST (Central 9%): ₹4,500
- •SGST (State 9%): ₹4,500
- •Total Invoice Amount: ₹59,000
Takeaway: If you are quoted an all-inclusive price of ₹59,000, the reverse formula extracts the base as ₹59,000 / 1.18 = ₹50,000.
Related Guides & Calculation Deep Dives
All guidesOld vs New Tax Regime: How to Choose
Under current rules (FY 2024-25 / FY 2025-26), the New Tax Regime is the default choice with lower slab rates and a ₹75,000 standard deduction, while the Old Regime requires extensive deductions (Section 80C, 80D, HRA, home loan interest) exceeding ₹3.75 Lakhs to beat it.
How to Calculate GST on a Bill (With Examples)
To add 18% GST to a price of ₹10,000, multiply by 0.18 to get ₹1,800 tax (total ₹11,800). To remove 18% GST from an inclusive MRP of ₹11,800, divide by 1.18 to find the base price of ₹10,000 and tax of ₹1,800.
How to Calculate Discounts and Sale Prices
To calculate a sale price: Sale Price = Original Price × (1 - Discount% / 100). On a ₹2,500 jacket with a 30% discount, you save ₹750 and pay ₹1,750. Stacked discounts like "50% + 20% off" equal 60% total discount, not 70%.
GST Tax FAQs
Common questions, calculation formulas, and usage rules.
For transactions within the same Indian state, GST is split equally into Central GST (CGST) and State GST (SGST).