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5%, 12%, 18%, 28% Slabs

GST Calculator (Add GST / Remove GST / All Slabs)

Calculate Inclusive & Exclusive GST, CGST, SGST, IGST & Invoice Base Amounts

All Calculators (11) How It Works Formula FAQs

GST Calculator (Add GST / Remove GST)

Quickly calculate GST amounts, base prices, CGST, SGST, and IGST for any invoice value and GST slab.

5%, 12%, 18%, 28%
₹
Total Final Invoice Amount
₹ 59,000
Net Base Amount ₹ 50,000
Total GST Tax Amount ₹ 9,000
Intra-State CGST (9%) ₹ 4,500
Intra-State SGST (9%) ₹ 4,500
Inter-State IGST (18%) ₹ 9,000
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In-Depth Overview

About the GST Calculator (Add GST / Remove GST / All Slabs)

Accurately compute Goods and Services Tax (GST) amounts for any commercial transaction in India. Toggle between 'Add GST' (Exclusive) and 'Remove GST' (Inclusive / Reverse calculation), calculate CGST, SGST, and IGST splits across all statutory GST slabs (5%, 12%, 18%, 28%).

Key Capabilities & Features

  • Supports forward (Add GST) and reverse (Remove GST inclusive) calculations
  • Automatic intra-state (CGST 50% + SGST 50%) and inter-state (IGST 100%) breakdown
  • Supports standard 5%, 12%, 18%, and 28% GST rate slabs
  • Helps small businesses, freelancers, and accountants prepare compliant tax invoices
  • Assists in verifying vendor invoices for Input Tax Credit (ITC) claiming in GSTR-3B
Step-by-Step Guide

How Does the GST Calculator Work?

Follow these simple steps to obtain instant, legally validated mathematical and tax calculations.

1

1. Select Calculation Mode

Choose 'Add GST' (if starting from net base price) or 'Remove GST' (if starting from total MRP / invoice price).

2

2. Enter Transaction Amount

Input the invoice amount, product price, or service contract value in Indian Rupees (₹).

3

3. Choose GST Slab Rate

Select the applicable GST slab: 5% (essential goods), 12% (processed goods), 18% (standard services & IT), or 28% (luxury items).

4

4. Instant Tax & Ledger Breakdown

View the exact net base price, total GST amount, intra-state CGST + SGST split, and inter-state IGST total for your invoice.

Mathematics & Law

Formula & Calculation Logic

Mathematical Formula
Add GST: Total = Base Price + (Base Price × Rate / 100) | Remove GST: Base = Total / (1 + Rate / 100), GST = Total - Base

For GST Exclusive transactions (Add GST), GST is calculated by multiplying the net base price by the applicable GST rate, and added to yield the gross invoice value. For GST Inclusive transactions (Remove GST / Reverse calculation), the net base price is derived by dividing total amount by (1 + GST Rate / 100), and subtracting base price from gross amount gives the embedded GST. Intra-state sales split GST equally into CGST (Central GST) and SGST (State GST), while inter-state sales levy IGST (Integrated GST).

Expert Advisory Recommendation:

Online estimations provide mathematical clarity, but real-world filing involves matching multiple source ledgers (AIS/TIS, Form 26AS, GSTR-2B, broker P&L). Consult with an EasyFile Tax Specialist before submitting statutory tax returns to avoid mismatch intimations.

Got Questions?

Frequently Asked Questions

Expert answers on statutory compliance, exemptions, and calculation rules.

CGST (Central GST) and SGST (State GST) apply simultaneously on intra-state transactions (within the same state) where revenue is split 50:50 between Center and State. IGST (Integrated GST) applies on inter-state transactions (between two different states) and imports.

Use the reverse formula: Base Price = Total Inclusive Price / (1 + GST Rate / 100). For example, if a bill is ₹11,800 with 18% GST, Base Price = 11,800 / 1.18 = ₹10,000, and GST is ₹1,800.

Yes! GST registered businesses can claim Input Tax Credit (ITC) under Section 16 of the CGST Act on all goods and services purchased for business furtherance, provided invoices match with GSTR-2B.

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