How to calculate 18% GST on an amount?

To add 18% GST: Multiply the base amount by 0.18. Example: For ₹10,000, GST = 10,000 × 0.18 = ₹1,800. The total gross payable is ₹11,800.

How to remove 18% GST from a total MRP amount?

To remove 18% GST from a gross amount: Divide the gross amount by 1.18. Example: For ₹11,800, Base Price = 11,800 ÷ 1.18 = ₹10,000. The GST component is ₹1,800.

How is 18% GST divided between CGST and SGST?

For intrastate sales (within the same state), 18% GST is split equally into 9% CGST (Central Tax) and 9% SGST (State Tax). For interstate sales (between different states), the full 18% is collected as IGST.

Which goods and services fall under the 18% GST slab?

The 18% GST slab covers IT and software development, website design, SaaS subscriptions, management consulting, telecommunications, restaurants in star-rated hotels, capital goods, hair oil, toothpaste, and commercial electronics.

18% GST Calculator (Inclusive & Exclusive)

Instant online calculator specifically optimized for India's 18% standard GST slab. Calculate 9% CGST + 9% SGST splits or 18% IGST with 1-click WhatsApp sharing.

Other Slabs: 🪙 Gold (3%) 5% Slab 12% Slab 18% (Standard) 28% Luxury

Calculation Mode

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₹

50 5,00,000 10,00,000

Quick Amount Presets

Selected Rate

Transaction Jurisdiction

Total Payable (Gross Amount)

₹11,800.00

18% GST Applied

Net Taxable Price: ₹10,000.00

Total 18% GST Amount: ₹1,800.00

CGST (Central Tax 9%): ₹900.00

SGST (State Tax 9%): ₹900.00

IGST (Integrated Tax 18%): ₹1,800.00

Gross Total Amount: ₹11,800.00

How to Calculate 18% GST (Official CBIC Formula)

Use these exact mathematical equations to compute 18% tax forward or backward:

1. Add 18% GST (Tax Exclusive)

GST (18%) = Base Amount × 0.18

Total Payable = Base Amount × 1.18

Example: For a ₹5,000 freelance design project: GST = 5,000 × 0.18 = ₹900. Total invoice amount = ₹5,900.

2. Remove 18% GST (Tax Inclusive)

Base Price = Total Amount ÷ 1.18

GST Extracted = Total Amount - Base Price

Example: For a ₹5,900 retail bill: Base Price = 5,900 ÷ 1.18 = ₹5,000. GST component = ₹900.

Major Goods & Services Taxed at 18% in India

The 18% GST tax rate is the most prominent tax slab in India, covering the vast majority of commercial business-to-business (B2B) services and consumer electronics:

Category	HSN / SAC	CGST (9%)	SGST (9%)	Description
IT & Software	998314	9%	9%	Software programming, website development, SaaS tools, cloud hosting and digital maintenance.
Consulting	998311	9%	9%	Management consultancy, legal assistance for corporate entities, accounting, and PR services.
Telecom & Internet	9984	9%	9%	Broadband internet, cellular mobile voice & data packages, and satellite television subscriptions.
Consumer Goods	8471 / 8517	9%	9%	Desktop computers, microprocessors, hair oils, soaps, branded footwear priced above ₹1,000.

Create 18% GST Invoice (Free PDF) All GST Slabs Calculator

18% GST FAQs

For adding GST: Multiply the amount by 0.18 to get tax, or multiply by 1.18 to get the gross total. For removing GST from a total price: Divide by 1.18 to get the pre-tax base amount.

If the supplier and recipient are in the same state, it is split equally into 9% CGST (Central Government) and 9% SGST (State Government). If the transaction is interstate (e.g. Maharashtra to Karnataka), the entire 18% is deposited as IGST (Integrated Tax).

Yes. Registered businesses can claim 100% Input Tax Credit on goods and services taxed at 18% used in the course or furtherance of business, provided they have a valid tax invoice and the supplier has filed GSTR-1.