GST Calculator

Please enter a positive number
Please enter a rate between 0.1% and 100%
GST Amount: ₹180.00
Total Amount: ₹1,180.00
Pre-GST Amount: ₹0.00

GST Invoice Generator (Coming Soon)

We're developing a full-featured GST invoice generator that will help you create professional GST-compliant invoices in seconds.

Features:

  • Automatic GST calculations
  • Customizable invoice templates
  • Client management system
  • Digital signature support
  • Export to PDF/Excel

GST Rates in India (Common Slabs)

GST Rate
5%
Essential goods, Transport
GST Rate
12%
Computers, Processed foods
GST Rate
18%
Electronics, Restaurants
GST Rate
28%
Luxury items, Automobiles

Test Cases

Amount GST Rate Mode GST Total
₹1,000 18% Exclusive ₹180 ₹1,180
₹2,360 18% Inclusive ₹360 ₹2,000*
₹5,000 5% Exclusive ₹250 ₹5,250

* Pre-GST amount

GST Calculator FAQs

What is GST and how does it work?

GST (Goods and Services Tax) is a comprehensive, multi-stage, destination-based indirect tax levied on every value addition in India. It replaced multiple cascading taxes levied by the central and state governments, creating a unified national market.

Key features:

  • One Nation, One Tax system
  • Elimination of tax-on-tax (cascading effect)
  • Higher threshold for registration
  • Composition scheme for small businesses
  • Online compliance procedures
How to calculate reverse GST?

Reverse GST calculation is used when the total amount includes GST and you need to determine the pre-GST amount and GST amount separately. Here's the formula:

Pre-GST Amount = Total Amount / (1 + GST Rate/100)

GST Amount = Total Amount - Pre-GST Amount

Example: For ₹2,360 inclusive amount at 18% GST rate:

  • Pre-GST Amount = 2360 / (1 + 18/100) = ₹2,000
  • GST Amount = 2360 - 2000 = ₹360
How to calculate GST interest and penalty?

GST Interest: If you delay GST payment, interest is charged at 18% per annum. The calculation is:

Interest = (Tax amount × Number of days delayed × 18%) / 365

GST Penalty: For non-payment or short-payment of GST, a penalty of 10% of the tax amount (minimum ₹10,000) is applicable. In case of fraud, the penalty can be 100% of the tax amount.

Example: For ₹50,000 tax paid 30 days late:

  • Interest = (50,000 × 30 × 0.18) / 365 = ₹739.73
  • Penalty = 10% of 50,000 = ₹5,000
  • Total additional payment = ₹5,739.73
What are the GST slabs in India?

India has four primary GST slabs along with special categories:

  • 0% GST: Essential food items, books, newspapers, handloom, etc.
  • 5% GST: Household necessities, transport services, small restaurants
  • 12% GST: Processed foods, computers, mobile phones, business class air tickets
  • 18% GST: Most goods and services - electronics, financial services, restaurants
  • 28% GST: Luxury items, automobiles, tobacco, aerated drinks, 5-star hotels

Additionally, there are special rates:

  • 0.25% on rough precious and semi-precious stones
  • 3% on gold and precious metals
  • Cess on luxury goods and sin products
When to use inclusive vs exclusive GST?

Exclusive GST is used when the price quoted is before GST. This is common in business-to-business transactions, wholesale pricing, and professional services.

Inclusive GST is used when the price already includes GST. This is the standard for consumer pricing in retail stores, e-commerce platforms, and restaurants.

Key differences:

Scenario Recommended Mode
Business invoices Exclusive
Retail pricing Inclusive
Service quotations Exclusive
E-commerce product prices Inclusive
What is the time limit for GST payment?

GST payments must be made by the 20th of the following month. For example:

  • Tax collected in January must be paid by February 20th
  • Quarterly filers (composition scheme) must pay by the 18th of the month following the quarter

Late payment consequences:

  • Interest charged at 18% per annum on the outstanding amount
  • Penalty of 10% of the tax due or ₹10,000 (whichever is higher)
  • In case of deliberate tax evasion, penalty can be up to 100% of the tax due