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18% GST Calculator
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Under India's standard 18% GST rate, adding tax to a ₹10,000 net base yields ₹1,800 GST for an ₹11,800 gross total (divided into ₹900 CGST and ₹900 SGST). For an ₹11,800 tax-inclusive price, base price is ₹10,000 and GST is ₹1,800. Formulas apply CBIC GST 2.0 guidelines effective 22 September 2025.
Calculate 18% Goods and Services Tax (GST) for commercial invoices and services. View tax-exclusive and tax-inclusive calculations with exact CGST, SGST, and IGST breakdowns.
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How to Calculate 18% GST (Exclusive & Inclusive)?
- The tax rate is preloaded at 18% (the primary standard slab under GST 2.0).
- Enter the base or gross invoice amount (preset to ₹10,000).
- Select Exclusive (Add GST to base price) or Inclusive (Deduct GST from total price).
- View net base amount, total GST, and CGST/SGST or IGST tax splits.
18% GST Calculation Table for Standard Invoice Values
| Base Price | 18% GST Added | Gross Total (Exclusive) | Inclusive GST (from Base) | Intra-State (CGST + SGST) |
|---|---|---|---|---|
| ₹1,000 | ₹180.00 | ₹1,180.00 | ₹152.54 | ₹90.00 CGST + ₹90.00 SGST |
| ₹5,000 | ₹900.00 | ₹5,900.00 | ₹762.71 | ₹450.00 CGST + ₹450.00 SGST |
| ₹10,000 | ₹1,800.00 | ₹11,800.00 | ₹1,525.42 | ₹900.00 CGST + ₹900.00 SGST |
| ₹50,000 | ₹9,000.00 | ₹59,000.00 | ₹7,627.12 | ₹4,500.00 CGST + ₹4,500.00 SGST |
Source: Central Board of Indirect Taxes and Customs (CBIC) GST 2.0 schedules, effective 22 September 2025.
Formulas for 18% GST Calculation
The 18% slab uses standard commercial tax equations: - Exclusive (Add Tax): GST = (Base × 18) / 100. Total = Base + GST. Example: ₹10,000 base + ₹1,800 GST = ₹11,800. - Inclusive (Remove Tax): Base = Total / 1.18. GST = Total - Base. Example: ₹10,000 total = ₹8,474.58 base + ₹1,525.42 GST. - Tax Split: For intra-state supply, 18% is split into 9% CGST and 9% SGST. For inter-state supply, 18% is charged as IGST.
Goods and Services Taxed at 18%
The 18% rate is India's most widely applied tax slab, encompassing: - Professional services (IT, software, consulting, legal, accounting) - Banking, financial, and telecom services - Electronics, computers, monitors, and capital equipment - Commercial hospitality and hotel stays above threshold tariffs
Frequently asked questions
How to calculate 18% GST on 10,000?
To add 18% GST: 10,000 × 0.18 = ₹1,800 GST, for a total of ₹11,800. To remove 18% GST from an inclusive ₹10,000: 10,000 / 1.18 = ₹8,474.58 base price, and the GST portion is ₹1,525.42.
Can businesses claim Input Tax Credit on 18% GST?
Yes. Registered businesses can claim Input Tax Credit (ITC) on 18% GST paid for legitimate business inputs, software, and capital equipment against their output GST liabilities.
What is the CGST and SGST on 18% GST?
For sales within the same state, the 18% GST is divided equally: 9% Central GST (CGST) and 9% State GST (SGST). For inter-state sales, it is billed as 18% Integrated GST (IGST).
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