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Sales Tax Calculator

Calculate tax amount and total price with GST support

Last Updated: July 2026
Product/service price
Sales tax / GST rate
Whether price already includes tax
Base Price
—
Before tax
Tax Amount
—
Tax component
Total Price
—
Base + Tax

Tax Breakdown

ComponentValue

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What Is a Sales Tax Calculator?

A Sales Tax Calculator computes the tax amount and total price based on the base price and tax rate. It supports both tax-inclusive (extract tax from total) and tax-exclusive (add tax to base) calculations.

This calculator is useful for businesses pricing products, consumers understanding the true cost, and accountants reconciling invoices. It handles GST and other sales tax scenarios common in India.

Sales Tax Formula

Tax-Exclusive: Total = Base × (1 + Tax Rate)
Tax-Inclusive: Base = Total / (1 + Tax Rate)
Tax Amount = Total - Base
Base Price = Price before taxTax Rate = GST/sales tax %Total Price = Base + Tax

Frequently Asked Questions

What is sales tax?
Sales tax is a consumption tax levied on the sale of goods and services. In India, GST (Goods and Services Tax) replaced multiple indirect taxes. GST has 4 slabs: 5%, 12%, 18%, 28%.
How to calculate tax-exclusive price?
If price includes tax: Base Price = Total Price / (1 + Tax Rate). For ₹1,180 at 18% GST: Base = 1180 / 1.18 = ₹1,000, Tax = ₹180. This calculator handles both inclusive and exclusive pricing.
How to calculate tax-inclusive price?
If price excludes tax: Total Price = Base Price × (1 + Tax Rate). For ₹1,000 at 18% GST: Total = 1000 × 1.18 = ₹1,180. Always clarify whether quoted price includes tax.
What are the GST slabs in India?
GST has 4 main slabs: 5% (essential goods), 12% (processed goods), 18% (most services and manufactured goods), 28% (luxury items). Some items are exempt (fresh food, education). Check HSN code for your product.
Is MRP inclusive of tax?
Yes, MRP (Maximum Retail Price) is inclusive of all taxes including GST. However, B2B transactions often quote prices excluding GST. Always clarify whether price is inclusive or exclusive of tax.

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