GST Authority Hub V2.6

Online GST Calculator & Free GST Invoice Generator

Calculate GST, reverse GST, create GST invoices with logo, discount, shipping, CGST/SGST/IGST and download professional PDF invoices instantly.

Quick GST Calculator

Professional Invoice Upgrade

GST Invoice Generator

Create GST invoice with logo, authorized signature, company stamp, line items, HSN/SAC, discount, shipping, PDF/image download and social sharing.

Business Details

Customer Details

Invoice Settings

Discount & Shipping

ItemHSN/SACQtyRateDiscGST%Total

Your Business Name

Business address

GSTIN: -

TAX INVOICE

Invoice:

Date:

Due:

Bill To

Customer Name

Customer address

GSTIN: -

Supply Details

Seller State:

Place of Supply:

Tax Type: CGST + SGST

#ItemHSN/SACQtyRateDiscountGSTTotal

Notes

Terms & Conditions

Signature
Authorized Signature
Company Stamp
Company Stamp

HSN/SAC Finder

GST Rate Finder

Reverse GST Calculator

GST Profit Margin Calculator

Free GST Invoice Generator Online

This free GST invoice generator helps Indian businesses, freelancers, shop owners and service providers create clean GST bills without installing software. You can add your logo, GSTIN, HSN/SAC codes, item-wise GST, discount, shipping, notes and terms, then print or download the invoice as a PDF.

What is GST?

GST stands for Goods and Services Tax. It is an indirect tax used in India for goods and services. A good GST calculator and invoice format helps buyers and sellers understand taxable value, CGST, SGST, IGST and final payable amount clearly.

How to calculate GST

To add GST, multiply the base amount by the GST rate and divide by 100. To remove GST from an inclusive price, divide the final price by 1 plus the GST rate. This page includes both normal GST and reverse GST calculation tools.

GST Slabs

GST Rate Slabs in India

Understand the common GST slabs used for goods and services.

  • 0% — Essential goods and exempt supplies.
  • 5% — Daily-use goods and selected services.
  • 12% — Processed goods and standard categories.
  • 18% — Most services, electronics, software and business services.
  • 28% — Luxury and premium goods.
Examples

GST Calculation Examples

Simple examples for add GST, remove GST, CGST/SGST and IGST.

  • Base ₹1,000 with 18% GST = GST ₹180 and final price ₹1,180.
  • Inclusive ₹1,180 at 18% GST = base ₹1,000 and GST ₹180.
  • Same-state sale of ₹10,000 at 18% = CGST ₹900 + SGST ₹900.
  • Interstate sale of ₹10,000 at 18% = IGST ₹1,800.
Invoice Guide

GST Invoice Format and Required Fields

Know the important fields needed in a clean GST invoice.

A GST invoice should clearly show supplier details, GSTIN, invoice number, invoice date, customer details, place of supply, HSN/SAC code, quantity, taxable value, GST rate, tax amount and grand total.

HSN & SAC

HSN and SAC Code Guide

HSN is used for goods and SAC is used for services.

HSN codes classify goods while SAC codes classify services. Using correct codes helps create better invoice records and supports GST reporting.

Business Guides

GST Help for Different Businesses

Useful GST topics for freelancers, travel agencies, hotels, restaurants, consultants and sellers.

  • GST for Freelancers
  • GST for Travel Agencies
  • GST for Consultants
  • GST for Hotels
  • GST for Restaurants
  • GST for Online Sellers
Related Tools

Related Business Calculators

Useful tools for business owners and invoice users.

  • GST Calculator
  • Reverse GST Calculator
  • GST Invoice Generator
  • Profit Margin Calculator
  • Discount Calculator
  • Sales Tax Calculator
Knowledge Hub

Complete GST Knowledge Hub for Small Businesses

A helpful GST explanation section for better SEO and AdSense value.

GST affects pricing, invoicing, purchases, filing and business compliance. Small businesses need to understand how GST is calculated, when GST registration may be needed, how input tax credit works, and how invoice records should be maintained.

CGST and SGST usually apply within the same state. IGST applies to interstate supplies. A good GST calculator helps estimate tax quickly, but businesses should still verify rates before filing returns.

FAQ

GST Frequently Asked Questions

Everything You Need to Know About GST Calculation, GST Invoices, GST Rates, HSN Codes, and GST Compliance in India

What is GST?

GST (Goods and Services Tax) is an indirect tax applied to the supply of goods and services in India. It replaced multiple indirect taxes such as VAT, service tax and excise duty, creating a unified tax system across the country.

What is a GST Calculator?

A GST Calculator is an online tool that helps individuals and businesses calculate GST amounts instantly. It can calculate GST-exclusive prices, GST-inclusive prices, CGST, SGST and IGST without manual calculations.

How do I calculate GST?

GST is calculated using the formula: GST Amount = Original Price × GST Rate ÷ 100. For example, if a product costs ₹1,000 and GST is 18%, the GST amount is ₹180 and the final price becomes ₹1,180.

What are the GST slabs in India?

India currently follows GST slabs of 0%, 5%, 12%, 18% and 28%. Different goods and services are taxed under different slabs based on government regulations.

What is CGST?

CGST stands for Central Goods and Services Tax. It is collected by the Central Government on transactions occurring within the same state.

What is SGST?

SGST stands for State Goods and Services Tax. It is collected by the State Government on transactions occurring within the same state.

What is IGST?

IGST stands for Integrated Goods and Services Tax. It is charged on inter-state transactions and imports of goods and services.

What is the difference between CGST, SGST and IGST?

For transactions within the same state, GST is split equally between CGST and SGST. For transactions between different states, IGST is charged instead.

How do I calculate GST from an inclusive amount?

To calculate GST from a GST-inclusive amount, use: GST Amount = Inclusive Price × GST Rate ÷ (100 + GST Rate). This helps determine the GST portion already included in a price.

What is a GST Invoice?

A GST Invoice is a tax document issued by a GST-registered supplier that contains invoice details, GSTIN, item descriptions, tax rates and total payable amount.

Why is a GST Invoice important?

A GST invoice serves as proof of sale and helps eligible businesses claim Input Tax Credit (ITC) under GST regulations.

What details must be included in a GST Invoice?

A GST invoice should include invoice number, invoice date, supplier details, customer details, GSTIN, product description, quantity, tax rates, tax amounts and total invoice value.

Can I create a GST Invoice online?

Yes. Online GST Invoice Generators allow businesses, freelancers and professionals to generate GST-compliant invoices instantly and download them as PDF files.

What is GSTIN?

GSTIN stands for Goods and Services Tax Identification Number. It is a unique registration number assigned to GST-registered businesses in India.

What is Input Tax Credit (ITC)?

Input Tax Credit allows registered businesses to claim credit for GST paid on purchases and business expenses, reducing their overall tax liability.

Can freelancers charge GST?

Yes. Freelancers may need to charge GST if they meet applicable registration requirements and turnover thresholds under GST laws.

What is an HSN Code?

HSN (Harmonized System of Nomenclature) is a standardized coding system used to classify goods for taxation and reporting purposes.

What is an SAC Code?

SAC (Services Accounting Code) is a classification code used for services under the GST system.

Why are HSN and SAC Codes important?

HSN and SAC codes help identify the correct GST rate, improve invoice accuracy and simplify GST compliance.

Can I download GST Invoices as PDF?

Yes. GST invoices generated using our tool can be downloaded as professional PDF documents for printing, sharing and record keeping.

Is an online GST Calculator free?

Yes. OnlineGSTCalculator24.com provides a free GST Calculator and GST Invoice Generator that can be used without registration.

Can GST be removed from a price?

Yes. Reverse GST calculation can determine the original price before GST was added, helping users calculate GST-exclusive values.

What is the GST rate on restaurant bills?

GST rates for restaurant services depend on the type of establishment and applicable GST regulations in force at the time.

What is the GST rate on hotel rooms?

GST rates for hotel accommodation vary depending on room tariffs and applicable GST classifications issued by authorities.

Can GST be charged on shipping charges?

Yes. Shipping, transportation and handling charges may attract GST depending on the transaction structure and applicable regulations.

Is GST applicable to online businesses?

Yes. GST may apply to e-commerce businesses, online sellers, digital service providers and freelancers depending on applicable GST laws.

Why use OnlineGSTCalculator24.com?

OnlineGSTCalculator24.com helps individuals, freelancers, consultants and businesses calculate GST accurately, generate GST invoices instantly, download professional PDFs and understand GST concepts through detailed guides and FAQs.

Start Free

Create GST Invoice Online

Free GST calculator and GST invoice generator for small businesses, freelancers, consultants, shops and service providers.

Free • Instant • No Registration Required

Start Using Free Tool