GST Calculator India
Add or remove GST from any amount in seconds with intra-state split.
📢 Rates as per GST 2.0, effective 22 Sept 2025. Verify on
cbic-gst.gov.in
for your item's specific HSN/SAC.
Rates and rules change. Check the official source. Official Verification: Rates as per GST 2.0 (effective 22 Sept 2025). Verify official notifications on cbic-gst.gov.in for your item's HSN/SAC.
Last updated: 2026-11-06 Source: Central Board of Indirect Taxes and Customs (CBIC)
How to Use the Free Toolblaze GST Calculator
Calculating Goods and Services Tax (GST) under India's updated GST 2.0 framework is quick, accurate, and secure with our browser-based calculator:
- Choose Mode: Select whether you want to Add GST to an exclusive net price, or Remove GST from a gross (inclusive) MRP.
- Enter the Amount: Type your numerical figure in Rupees (₹).
- Select Tax Slab: Choose from standard GST 2.0 slabs (0%, 5%, 18%, 40%, 3%, or 0.25%), or choose Custom Rate to input any arbitrary percentage (including historical rates for auditing invoices issued before 22 September 2025).
- Instant Calculation: Calculations update in real time without refreshing the page.
- Copy Breakdown: Click Copy Breakdown to grab a formatted summary ready for WhatsApp, email, or accounting software.
GST 2.0 Rate Slabs Overview
Effective 22 September 2025, the GST Council enacted structural reforms known as GST 2.0. The previous 12% and 28% slabs were officially removed and rationalized into the simplified 4-tier model:
- 0% (Exempt): Fresh food, unprocessed agricultural commodities, healthcare, and education.
- 5% (Merit Goods & Essentials): Packaged staples, transport, and renewable energy equipment.
- 18% (Standard Rate): Most professional services, IT software, commercial goods, and general industry supply.
- 40% (De-merit & Luxury Goods): Luxury automobiles, tobacco, and high-sugar carbonated drinks (replacing the previous 28% slab plus cess).
- Special Slabs: 3% on gold and jewellery; 0.25% on rough diamonds.
The Mathematical Formula Explained
1. Adding GST (Exclusive):
GST Amount = Net Base Amount × (GST Rate ÷ 100)
Total Invoice Value = Net Base Amount + GST Amount
2. Removing GST (Inclusive / Reverse):
Net Base Amount = Total Inclusive Value ÷ (1 + (GST Rate ÷ 100))
GST Component = Total Inclusive Value − Net Base Amount
Worked Real-World Example
Suppose an IT consultant bills ₹25,000 for web design services with 18% standard GST for a client within the same state:
- Net Base Price: ₹25,000.00
- Total GST (18%): ₹25,000 × 0.18 = ₹4,500.00
- Central GST (CGST - 9%): ₹2,250.00
- State GST (SGST - 9%): ₹2,250.00
- Final Gross Invoice: ₹29,500.00
Common Invoicing Mistakes to Avoid
- Using Obsolete Slabs: Invoices issued after 22 September 2025 should not apply the old 12% or 28% rates unless specifically dealing with transitional credit adjustments for historical contracts.
- Subtracting Percentage Directly from MRP: Calculating 18% of ₹11,800 gives ₹2,124, subtracting which gives ₹9,676—this is mathematically incorrect. Always divide the MRP by 1.18 to isolate the base.
- Interstate vs Intrastate Confusion: Intra-state supply splits tax equally between CGST and SGST. Inter-state supply levies IGST at the full rate.
Frequently Asked Questions
What are the standard tax slabs under GST 2.0?
Under GST 2.0 (effective 22 September 2025), primary rate tiers include 0%, 5%, 18%, and 40%, alongside special rates of 3% for gold and jewellery and 0.25% for rough diamonds. For item-specific HSN/SAC codes, check the official portal at cbic-gst.gov.in.
How does the calculator split CGST and SGST?
For intra-state sales (within the same state), the total GST rate is divided equally between Central GST (CGST) and State GST (SGST). For inter-state supplies, Integrated GST (IGST) applies at the full rate.
How do I add GST to a base price?
Enter your net amount, choose the applicable slab rate, and the calculator adds the statutory tax to display the gross total alongside the tax breakdown.
Where can I verify official GST rates for my product or service?
Official classification schedules and notifications are published by the Central Board of Indirect Taxes and Customs on cbic-gst.gov.in. Consult a chartered accountant for complex classification matters.
What items fall under the special GST slabs?
Special statutory rates include 3% on gold and jewellery and 0.25% on rough diamonds. Specific entry eligibility should be verified against official notifications on cbic-gst.gov.in.
What is the difference between GST inclusive and exclusive pricing?
GST exclusive pricing means tax is added on top of the quoted base price. GST inclusive pricing means the stated price already contains the applicable GST component.
Does using this calculator constitute formal tax advice?
No. This calculator is provided for informational estimation purposes only. Tax laws and rates are subject to official amendments; consult official CBIC publications or a tax professional for statutory filings.