What is the formula to calculate GST in India?

For GST Exclusive (Adding GST): GST Amount = (Original Cost × GST Rate) / 100. Net Price = Original Cost + GST Amount. For GST Inclusive (Removing GST): GST Amount = Original Cost - [Original Cost × {100 / (100 + GST Rate)}].

How is GST split between CGST and SGST?

For Intra-state transactions (within the same state), GST is split equally: 50% CGST (Central Tax) and 50% SGST (State Tax). For Inter-state transactions (different states), the entire amount is charged as IGST (Integrated Tax).

What are the active GST tax slabs in India?

India primarily follows four standard GST tax slabs: 5% (essential goods/transport), 12% (processed foods/apparel), 18% (IT services/electronics/restaurants), and 28% (automobiles/luxury items), along with 0% for basic unbranded food.

Free Online Tax Tool

Online GST Calculator India

Calculate GST amount, base price, and CGST/SGST/IGST tax splits with instant inclusive or exclusive computation.

Calculation Type

Adds GST to your base price to compute total payable amount.

Enter Base Amount (₹)

₹

GST Rate (%) Selected: 18%

Supply Type (State Jurisdiction)

Intra-State

Same State (CGST + SGST)

Inter-State

Out of State (IGST)

Calculation Breakdown

Net / Base Price ₹10,000.00

CGST (9%) ₹900.00

SGST (9%) ₹900.00

Total GST Amount ₹1,800.00

Total Gross Amount

₹11,800.00

Create Bill with this Amount

GST Calculation Formula

Exclusive (Add GST):

GST = (Base Price × Rate) ÷ 100

Gross = Base Price + GST

Inclusive (Remove GST):

Base = Total Amount × [100 ÷ (100 + Rate)]

GST = Total Amount - Base

Indian GST Tax Slabs

5% Slab

Tea, edible oil, railway tickets, spices

12% Slab

Apparel above ₹1k, computers, dairy items

18% Slab

Software, restaurants, telecoms, electronics

28% Slab

Automobiles, luxury goods, cement