GST Calculator India 2026 — New Slabs, How to Calculate, Examples
Goods and Services Tax (GST) has revolutionized the Indian tax landscape, but for many small business owners and freelancers, the math can still be confusing. In 2026, some new classifications make it even more important to use the right formulas.
Current GST Slabs (2026 Summary)
- 0% (Exempt): Unpacked food grains, fresh vegetables, healthcare.
- 5%: Sugar, spices, tea, life-saving drugs.
- 12%: Business class air travel, processed food.
- 18% (Standard): Most services, banking, insurance, and software.
- 28%: Sin goods (tobacco), luxury cars, high-end electronics.
How to Calculate GST Manually
Adding GST (Exclusive)
If you have a base price of ₹1,000 and want to add 18% GST:
1000 * (18 / 100) = 180Total = 1000 + 180 = 1180
Removing GST (Inclusive)
If you paid ₹1,180 and want to find the pre-tax price:
1180 - (1180 * (100 / (100 + 18)))1180 - (1180 * 0.8474) = 180 (GST portion)Base Price = 1000
Use Our Interactive GST Calculator
Don't waste time on manual math. Our real-time calculator handles add/remove logic and shows you the CGST/SGST split instantly.
Try it now: G S T Calculator
Interactive ToolWhy CGST and SGST?
For intra-state transactions (within the same state), GST is split 50-50 between the Central and State governments. If the total GST is 18%, you will see 9% CGST and 9% SGST on your invoice. Our tool shows this breakdown clearly to help you prepare your bills.
Planning your salary after these taxes? Use our Salary Calculator India 2026.
Frequently Asked Questions
What are the common GST slabs in 2026?
The common slabs remain 5%, 12%, 18%, and 28%, though some item categories have been reclassified in the latest 2026 budget.
How do I calculate GST Inclusive amount?
Formula: GST Amount = Original Cost – [Original Cost x {100 / (100 + GST%)}]