GST Calculator India 2025

Q: What's the difference between CGST, SGST, and IGST?

For intra-state sales (within same state): CGST + SGST split equally. For inter-state sales (different states): IGST only. Total GST is the same.

Q: How do I calculate GST exclusive amount?

If GST-inclusive price is ₹1180 at 18% GST: Exclusive = 1180 × 100 / (100+18) = ₹1000. GST amount = ₹180.

Q: Is this GST calculator updated for 2025?

Yes. Rates are current as per the latest GST Council recommendations applicable for FY 2025-26.

How to Use This GST Calculator

Choose mode — "Add GST" (when you have the base price) or "Remove GST" (when you have the total including GST).
Enter the amount — the base price or the GST-inclusive total.
Select GST rate — pick from common rates (5%, 12%, 18%, 28%) or enter a custom rate.
Pick transaction type — intra-state (CGST + SGST split) or inter-state (IGST only).
Read results — see GST amount, CGST/SGST/IGST breakdown, and final price.

GST Rates in India (2025-26)

Rate	Examples
0%	Fresh fruits, vegetables, milk, eggs, books, newspapers, healthcare services
3%	Gold, silver, diamonds (special rate for precious metals)
5%	Tea, coffee, sugar, edible oil, footwear under ₹1000, transport services
12%	Butter, ghee, mobile phones, processed foods, business class flights
18%	Most goods and services — soaps, biscuits, IT services, AC restaurants, hotels ₹1000-7500
28%	Luxury items, cars, motorcycles, ACs, refrigerators, 5-star hotels (+ cess on some)

GST Calculation Formulas

Adding GST (to a base price)

GST Amount = Base Price × (GST Rate / 100)
Total Price = Base Price + GST Amount

Example: Base ₹10,000 at 18% GST → GST = ₹1,800 → Total = ₹11,800

Removing GST (from a total inclusive price)

Base Price = Total ÷ (1 + GST Rate / 100)
GST Amount = Total − Base Price

Example: Total ₹11,800 at 18% GST → Base = 11,800 ÷ 1.18 = ₹10,000 → GST = ₹1,800

CGST + SGST vs IGST — Which Applies?

Under India's GST system, every transaction is either intra-state (buyer and seller in the same state) or inter-state (different states).

Intra-state (within same state) — CGST (Central GST) + SGST (State GST), each at half the total rate. For 18% GST: 9% CGST + 9% SGST.
Inter-state (between states) — IGST (Integrated GST) at the full rate. For 18% GST: 18% IGST.
UTGST — for transactions within Union Territories (replaces SGST).

Total GST collected is identical either way — the split just determines how revenue is shared between Centre and State.

When You Need to Pay GST

Business turnover above ₹40 lakh (goods) or ₹20 lakh (services) — mandatory GST registration.
Inter-state supply — mandatory regardless of turnover.
E-commerce sellers — mandatory regardless of turnover.
Casual taxable persons, non-resident taxable persons — mandatory.

Frequently Asked Questions

What are the GST rates in India?

India has 4 main GST slabs: 5%, 12%, 18%, and 28%. Essential items (food grains, books) are 0%. Gold is 3%. Luxury and sin goods (cars, tobacco) are 28% plus additional cess.

What's the difference between CGST, SGST, and IGST?

For intra-state sales (within same state): CGST + SGST, each at half the rate. For inter-state sales (different states): IGST at full rate. Total GST paid is the same either way.

How do I calculate GST exclusive amount from inclusive price?

Use the formula: Exclusive = Inclusive × 100 / (100 + GST Rate). Example: ₹1180 inclusive at 18% GST → Exclusive = 1180 × 100 / 118 = ₹1000. GST amount = ₹180.

Is this GST calculator updated for 2025-26?

Yes. All rates and formulas are current per the latest GST Council recommendations applicable for FY 2025-26.

Can I use this for filing GSTR returns?

This is a calculation tool for quick estimates. For actual GST returns (GSTR-1, GSTR-3B, etc.), use GST portal or accounting software like Tally, Zoho Books, or ClearTax GST.

What is GST on petrol and alcohol?

Petroleum products (petrol, diesel, ATF, natural gas, crude oil) and alcohol for human consumption are NOT under GST. They're taxed separately by state VAT and excise duty.

What is the GST limit for small businesses?

Mandatory GST registration kicks in at ₹40 lakh annual turnover for goods (₹20 lakh for special states) or ₹20 lakh for services. The Composition Scheme allows simplified taxation up to ₹1.5 crore.

Calculate GST

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