Free Online GST Calculator

Calculate Goods and Services Tax (GST) easily for your rental, service, or product invoices. Supports both GST Exclusive and GST Inclusive modes.

GST Input Details
GST Exclusive (+)
GST Inclusive (-)
3%
5%
12%
18% (Standard/Rent)
28%
Custom %
Calculation Summary
Net Base Amount: ₹10,000.00
GST Rate Applied: 18%
Total GST Tax Amount: ₹1,800.00

Tax Breakdown

CGST (9%): ₹900.00
SGST (9%): ₹900.00
IGST (Inter-State 100%) ₹1,800.00

How GST Calculation Works

1. GST Exclusive Formula (Adding GST to base amount):

GST Amount = (Base Amount × GST%) / 100

Total Gross Amount = Base Amount + GST Amount

2. GST Inclusive Formula (Extracting GST from gross amount):

Base Amount = Gross Amount / (1 + (GST% / 100))

GST Amount = Gross Amount - Base Amount

Frequently Asked Questions (FAQs)

Direct answers about Goods and Services Tax (GST) formulas, rental tax slabs, and CGST/SGST/IGST splits.
What is the difference between GST Exclusive and GST Inclusive calculations? +
GST Exclusive means the tax amount is added on top of the base cost (Base Amount + GST = Total Gross). GST Inclusive means the entered amount already includes tax, and the base price and tax portion are reverse-calculated (Base Amount = Gross Amount / (1 + GST Rate / 100)).
What GST rate applies to commercial property and equipment rentals in India? +
Commercial property rent and most equipment or asset rentals generally attract an 18% GST rate under service accounting codes (SAC 9972 and SAC 9973). Residential property rented to GST-registered businesses also falls under the 18% reverse charge mechanism (RCM).
How is GST split between CGST, SGST, and IGST? +
For intra-state transactions (within the same state), GST is split equally into 50% CGST (Central GST) and 50% SGST (State GST). For inter-state transactions (between two different states), 100% of the tax is billed as IGST (Integrated GST).
How do you calculate GST amount manually using the formula? +
To add GST (Exclusive): GST Amount = (Base Amount × GST%) / 100. To remove GST (Inclusive): GST Amount = Gross Amount - [Gross Amount / (1 + (GST% / 100))].
Are refundable security deposits subject to GST? +
Pure refundable security deposits are not subject to GST because they represent collateral rather than consideration for a service. However, if a deposit is forfeited, retained for property damage, or adjusted against rent, GST applies to the forfeited amount.
Can rental businesses claim Input Tax Credit (ITC) on GST paid? +
Yes, GST-registered rental businesses can claim Input Tax Credit (ITC) on GST paid for commercial rent, repair costs, maintenance services, and capital asset purchases, provided valid tax invoices are maintained and used for business furtherance.