What are the GST rates in India?

India has 4 main GST slabs: 5% (essential goods), 12% (processed foods, standard goods), 18% (most services, electronics), and 28% (luxury goods, automobiles). There is also a 0% rate for essential commodities like fresh vegetables and milk.

What is the difference between CGST, SGST, and IGST?

For intra-state transactions, GST is split equally into CGST (Central GST) and SGST (State GST). For inter-state transactions, IGST (Integrated GST) is levied at the full rate, which is then distributed between the center and destination state.

How do I calculate GST from an inclusive price?

To remove GST from an inclusive price: Pre-GST Amount = Price × 100 / (100 + GST rate). For example, if the GST-inclusive price is Rs 118 at 18%, the pre-GST amount is Rs 100 and GST is Rs 18.

What goods fall under 28% GST?

The 28% GST slab covers luxury items like automobiles (some categories), tobacco products, aerated drinks, luxury hotels (above Rs 7,500 per night), and certain premium goods. Many items were moved from 28% to lower slabs after GST Council reviews.

Why does GST matter for small businesses?

GST changes how businesses price products, collect tax, and file returns. Accurate calculations help maintain compliance, avoid undercharging customers, and make invoices easier to reconcile at month-end.

Can I use the same calculator for both inclusive and exclusive amounts?

Yes. The calculator supports both directions: adding GST to a base amount and removing GST from a GST-inclusive price so you can work with either invoice format.

TaxUpdated for 2026

GST Calculator

Add or remove GST from any amount instantly

Calculation Mode

Amount (before GST)

₹

GST Rate

GST Rate (custom)

Total Amount (with GST)

₹11,800

Total GST Amount

₹1,800

CGST (9%)

₹900

SGST (9%)

₹900

GST Breakdown

Original Amount₹10,000

CGST @ 9%₹900

SGST @ 9%₹900

Total GST @ 18%₹1,800

Final Amount (incl. GST)₹11,800

Quick Reference — All GST Slabs

GST 5%

GST: ₹500₹10,500

GST 12%

GST: ₹1,200₹11,200

GST 18%

GST: ₹1,800₹11,800

GST 28%

GST: ₹2,800₹12,800

Smart Insights

Personalised recommendations based on your inputs

Claim ₹1,800 as Input Tax Credit

High

If you're a registered business, the GST of ₹1,800 paid on this transaction can be claimed as Input Tax Credit (ITC) against your output tax liability.

ITC reduces your net GST payable — keep all invoices for filing.

Below GST Registration Threshold

Medium

Your annual turnover (approx ₹1,20,000) is below the Rs 20 lakh threshold for service providers. GST registration is not mandatory but voluntary registration can help claim ITC.

Voluntary registration lets you claim ITC but requires monthly returns.

Ensure Proper Invoice Compliance

Medium

A GST-compliant invoice must include your GSTIN, invoice number, date, customer GSTIN (if B2B), HSN/SAC code, item description, taxable value, CGST/SGST/IGST split, and total amount.

Proper invoicing avoids penalties and ensures smooth ITC claims.

Check Reverse Charge Applicability

Medium

At 18% GST, certain services (like legal services, GTA, insurance premiums) may fall under Reverse Charge Mechanism (RCM). Under RCM, the recipient pays GST directly instead of the supplier.

RCM compliance avoids interest and penalty on delayed payment.

Smart Recommendations

GST Scenario Analysis

Compare alternate GST slabs and transaction modes to understand tax impact.

Key Takeaway

GST Rate at 5%

Financial Action Plan

Implement high-impact scenarios first.

What-if Scenarios

Compare alternatives clearly.

Smart Recommendations

These top scenarios are worth prioritizing for immediate impact.

GST Rate at 5%
Essential goods slab
GST Rate at 12%
Standard goods slab
GST Rate at 28%
Luxury goods slab

Key Takeaway

GST Rate at 5% delivers ₹500 (-₹1,300). Focus on this outcome to improve your financial plan.

Financial Action Plan

Take these confident next steps.

GST Rate at 5%

Essential goods slab

GST Rate at 12%

Standard goods slab

GST Rate at 28%

Luxury goods slab

Action Summary

Prioritize high-impact moves that improve cash flow, reduce debt, or boost returns.

What-if Scenarios

Compare each scenario side-by-side in a modern, responsive layout.

Compare Now

GST Rate at 5%

Essential goods slab

Low Impact

GST Amount

₹500

-₹1,300

Total Amount

₹10,500

Tax Savings

₹1,300

GST Rate at 12%

Standard goods slab

Medium Impact

GST Amount

₹1,200

-₹600

Total Amount

₹11,200

Tax Savings

₹600

GST Rate at 28%

Luxury goods slab

Risk

GST Amount

₹2,800

+₹1,000

Total Amount

₹12,800

Extra Tax

₹1,000

Increase Amount by 20%

Transaction of ₹12,000 instead of ₹10,000

Medium Impact

GST Amount

₹2,160

+₹360

Total Amount

₹14,160

ITC Available

₹2,160

Switch to Remove GST

Extract GST from total

Low Impact

Base Amount

₹8,475

GST Amount

₹1,525

Total Amount

₹10,000

Content depth

How This Calculator Works

A practical guide to using GST Calculator with confidence.

The GST calculator helps businesses, freelancers, retailers, and buyers understand the impact of tax on invoices, purchase prices, and product pricing. In India, GST is applied in a layered way and can be confusing when you need to move between base prices and final tax-inclusive amounts. This calculator removes that friction and gives you accurate figures instantly, which is especially helpful when you are pricing products for customers or checking an invoice received from a supplier.

Many business owners do not only need the percentage; they also need a clear split between CGST and SGST for intra-state transactions. Because GST is calculated on the base amount and then added to it, even a small mistake in arithmetic can create a visible difference in the final invoice. Having a dependable calculator helps reduce disputes and improves confidence during billing and accounting work.

The content behind this tool is also useful for individuals who want to understand whether a listed price already includes tax or whether the displayed amount is the pre-GST price. For expenses such as electronics, restaurant bills, or online purchases, knowing the tax component supports better budgeting and transparent comparison shopping. The calculator is therefore useful both for compliance and for everyday financial awareness.

A strong understanding of the GST formula also helps you see how different slabs affect total cost. For example, a 28% rate can increase the price of a high-value item much more sharply than a 5% or 12% rate. When used responsibly, the calculator becomes a practical bridge between tax rules and real-world pricing decisions for both consumers and businesses.

Inputs You Enter

Base amount or inclusive amount
GST rate in percentage
Transaction type such as add or remove GST
Whether you want CGST and SGST split details

Outputs You Get

GST amount
Tax-inclusive or tax-exclusive value
CGST and SGST breakdown
Final payable amount

Assumptions and Limitations

The chosen GST slab is applied uniformly
The calculation uses the standard percentage formula
The calculator assumes a single rate for the entire amount
It does not account for special tax exemptions or input tax credit rules

Formula Used

GST Amount = Base Amount × Rate / 100

Base Amount: The amount before GST is added.
Rate: The applicable GST percentage such as 5%, 12%, 18%, or 28%.
Inclusive Amount: The final price that already includes GST, used when removing tax from a bill.

Step-by-Step Example

Imagine you are running a small online furniture business in Mumbai and you want to quote a product at ₹12,000 with 18% GST. The calculator will show the tax component as ₹2,160 and the final amount as ₹14,160. That helps you ensure your invoice is accurate and your margin expectations are realistic.

If you later receive a GST-inclusive bill of ₹11,800 at 18%, the calculator can reverse the tax and show the base price as ₹10,000, with ₹1,800 as GST. This is especially helpful when matching purchase invoices with accounting records and reconciling expenses at month-end.

Step 1: Enter the base price of ₹12,000.
Step 2: Choose an 18% GST rate.
Step 3: Select the add-GST option to calculate the final invoice value.
Step 4: Review the GST amount and the final price.
Step 5: Use the remove-GST option to verify the same amount from an inclusive invoice.
Step 6: Compare the result with your accounting software to confirm the invoice is correct.

Practical Tips and Common Mistakes

Always confirm whether the quoted amount is inclusive or exclusive of GST before using the calculator.
Use the correct GST slab for the product or service because wrong rates can materially alter invoice totals.
For business invoices, verify the split between CGST and SGST for intra-state transactions to maintain consistency.
Use the calculator when comparing vendor quotes so you can understand the true pre-tax and post-tax cost.