'); w.document.close(); w.print(); } }; } if (typeof taxgstShareResult === 'undefined') { window.taxgstShareResult = function(id, type) { var el = document.getElementById(id); var text = el ? el.innerText : ''; var url = window.location.href; if (type === 'whatsapp') window.open('https://api.whatsapp.com/send?text=' + encodeURIComponent(text + ' ' + url)); else if (type === 'twitter') window.open('https://twitter.com/intent/tweet?text=' + encodeURIComponent(text) + '&url=' + encodeURIComponent(url)); }; } if (typeof taxgstCopyResult === 'undefined') { window.taxgstCopyResult = function(id) { var el = document.getElementById(id); if (el) { navigator.clipboard.writeText(el.innerText).then(function(){ alert('Copied!'); }); } }; } if (typeof taxgstCalcEMI === 'undefined') { window.taxgstCalcEMI = function(p, r, n) { if (!p || !r || !n) return 0; r = r > 1 ? r / 12 / 100 : r; return p * r * Math.pow(1+r,n) / (Math.pow(1+r,n) - 1); }; } Reverse GST Calculator
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Reverse GST Calculator

Last updated: 2026-05-04
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Reverse GST Calculator

Remove GST from Total Amount to Find Base Price

GST 2.0
lightbulb How it works: Enter the total amount (including GST) and select the GST rate to find the original base price before GST was added.
18% (Standard Rate) ▼
0% (Nil/Exempt)
0.25% (Rough Diamonds - Sch. V)
1.5% (Cut & Polished Gems - Sch. VI)
3% (Gold, Silver, Jewellery - Sch. IV)
5% (Essentials & FMCG - Sch. I)
12% (Select Items - Bricks etc.)
18% (Standard Rate - Sch. II)
40% (Sin/Luxury Goods - Sch. III)
Total Amount (with GST): ₹1,180.00
GST Amount: ₹180.00
CGST (50%): ₹90.00
SGST (50%): ₹90.00
Base Price (without GST): ₹1,000.00

📐 Reverse GST Formula

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

For example, if Total Amount = ₹1,180 and GST Rate = 18%:
Base Price = 1180 × (100 ÷ 118) = ₹1,000

How to Calculate Reverse GST in India

The Reverse GST Calculator helps you find the original price of a product before GST was added. This is essential for traders, shopkeepers, and businesses who receive invoices with GST-inclusive prices and need to determine the base cost for accounting purposes.

When to Use Reverse GST Calculator?

  • Invoice Verification: Verify if the GST charged on an invoice is correct
  • Cost Analysis: Determine the actual cost of goods before tax
  • Profit Calculation: Calculate your actual profit margin excluding GST
  • ITC Claims: Verify Input Tax Credit amounts

GST Rate Categories (GST 2.0 - Sept 2025)

RateCategoryDivision Factor
5%Essential Items÷ 1.05
18%General Goods÷ 1.18
40%Luxury Items÷ 1.40

Frequently Asked Questions

What is Reverse GST Calculation?
Reverse GST calculation is the process of finding the original base price from a GST-inclusive total amount. It's the opposite of adding GST to a base price.
Is CGST and SGST always equal?
Yes, for intra-state transactions, CGST and SGST are always equal (50% each of total GST). For inter-state transactions, only IGST applies which equals the full GST amount.

Frequently Asked Questions about Reverse GST Calculator

Find answers to common questions about reverse gst calculator. Click on any question to expand the answer.

A reverse GST calculation is used to find the base price and GST amount from a final price that already includes GST. It's useful for sellers who want to quote a GST-inclusive price and need to know the taxable value for invoicing.

This tool is perfect for retailers, small business owners, and anyone who needs to issue a GST invoice based on a final selling price. It helps in accurately determining the pre-tax value and the tax components.

Simply enter the total GST-inclusive amount and select the correct GST rate. The calculator will instantly display the base amount (pre-tax value) and the corresponding GST amount.

The formula is straightforward. Base Amount = Total Amount / (1 + (GST Rate / 100)). Our calculator automates this for you to avoid manual errors.

Yes, the calculator is updated to work with all the new GST 2.0 slabs, including 5%, 18%, and 40%, ensuring your calculations are accurate as per the latest regulations effective from September 22, 2025.

gavel Legal Disclaimer

This calculator is for informational and educational purposes only. GST rates are based on the 56th GST Council meeting recommendations (GST 2.0 reforms effective September 22, 2025) and may be updated through subsequent council meetings. The applicable GST rate depends on HSN/SAC classification and nature of supply. This tool should not be considered as tax advice. Always verify GST rates on gst.gov.in and consult a qualified GST practitioner for specific guidance.

verified Source: GSTN, Govt. of India • Last updated: 2026-05-04

update Latest Updates & Regulatory Changes

IMPORTANT

policy GST 2.0 Reforms (56th Council)

The 56th GST Council meeting recommended significant reforms effective September 22, 2025, including rate rationalization, merged tax slabs, and revised HSN/SAC classifications.

UPDATED

local_shipping E-Way Bill Threshold Revised

E-Way Bill generation threshold and validity period have been updated as per the latest GST Council recommendations. Check the updated rules for inter-state and intra-state movement of goods.

NEW

sync_alt GST Rate Rationalization

Multiple GST rates have been rationalized under GST 2.0 reforms. Certain goods previously taxed at 28% now attract 18%, and some 18% items are now at 12%. Verify the latest rates on gst.gov.in.

description Terms, Rules & Regulations

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CGST Act, 2017 & GST 2.0

GST calculations are governed by the Central Goods and Services Tax (CGST) Act, 2017, as amended by the GST 2.0 reforms effective September 22, 2025. Rate rationalization, HSN classification, and compliance requirements are as per the latest GST Council recommendations.

rule

GST Filing & Compliance

Registered taxpayers must file GSTR-1 (outward supplies) by the 11th and GSTR-3B (summary return) by the 20th of the following month. Quarterly filers under QRMP scheme must file GSTR-3B by the 22nd/24th of the month following the quarter. Late fees apply for delayed filing.

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Rate Verification

GST rates are subject to change through GST Council recommendations and government notifications. The applicable rate depends on HSN/SAC classification, nature of supply (goods/services), and place of supply. Always verify rates on gst.gov.in before filing returns.

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