VAT / GST Calculator

Q: How do I add VAT/GST to a price?

Use the 'Price + Tax (Forward)' mode. Enter the net price and tax rate, then hit Calculate.

Q: How do I find the tax amount from a price that already includes tax?

Switch to 'Price Includes Tax (Reverse)' mode, enter the price that includes tax and the tax rate; the tool will extract the tax and net values.

Q: Is this calculator accurate for invoicing?

Yes for basic VAT/GST math it is accurate. For legal or tax filing consult a professional for jurisdiction-specific rounding rules.

Calculate tax quickly worldwide — forward (price + tax) and reverse (price includes tax).

Net Price (before tax)

Tax Rate (%)

VAT / GST Calculator – Complete Guide with Formula, Examples, and Use Cases

VAT (Value Added Tax) and GST (Goods and Services Tax) are indirect taxes applied to the sale of goods and services in most countries worldwide. Although different regions use different names and structures, the core principle remains the same: tax is charged on value addition at each stage of the supply chain, while the final burden is borne by the end consumer. This VAT / GST Calculator helps you accurately compute tax amounts in both forward and reverse scenarios within seconds.

Whether you are creating invoices, checking shopping prices, filing business accounts, or simply trying to understand how much tax is included in a price, this calculator provides a fast, reliable, and transparent way to calculate VAT or GST. It supports custom tax rates and common presets and works entirely inside your browser without storing any data.

What Is VAT / GST?

VAT and GST are consumption-based taxes charged on goods and services. Businesses collect tax from customers on behalf of the government and may offset the tax they have already paid on inputs. This mechanism avoids double taxation while ensuring tax is collected efficiently throughout the supply chain.

VAT is commonly used in the European Union, United Kingdom, and many other regions, while GST is used in countries such as India, Australia, New Zealand, and several Asian and African economies. Despite differences in administration and rates, the mathematical calculation of tax remains the same, making this calculator universally applicable.

Forward Tax Calculation (Adding VAT / GST)

Forward calculation is used when you know the base price of a product or service and need to add VAT or GST on top of it. This is the most common scenario for invoicing, billing, and price quotations.

Formula:

Tax Amount = Net Price × (Tax Rate ÷ 100)
Total Price = Net Price + Tax Amount

Example:If the net price is 1,000 and the tax rate is 18%:

Tax = 1,000 × 18% = 180
Total Price = 1,000 + 180 = 1,180

This method is widely used by businesses issuing invoices and freelancers quoting prices before tax.

Reverse Tax Calculation (Extracting VAT / GST)

Reverse calculation is used when the displayed price already includes VAT or GST and you need to determine the net price and tax portion. This is common in retail pricing, shopping receipts, and expense reimbursements.

Formula:

Net Price = Total Price ÷ (1 + Tax Rate ÷ 100)
Tax Amount = Total Price − Net Price

Example:If the total price is 1,180 and the tax rate is 18%:

Net Price = 1,180 ÷ 1.18 ≈ 1,000
Tax = 1,180 − 1,000 = 180

This method is especially useful for expense claims, accounting, and understanding how much tax you actually paid on a purchase.

Common VAT / GST Rates

Tax rates vary by country and product category. Some regions apply reduced rates or exemptions for essential goods and services. Common standard rates include 5%, 12%, 18%, and 28%, which are widely used in GST-based systems and as standard VAT bands globally. This calculator allows you to enter any custom rate to match your local tax rules.

Who Should Use This VAT / GST Calculator?

This tool is designed for a wide range of users:

Business owners creating invoices and quotations
Freelancers and consultants billing clients
Accountants and bookkeepers verifying tax amounts
Online sellers and ecommerce operators
Consumers checking tax-inclusive prices
Students learning indirect taxation concepts

Accuracy, Privacy, and Limitations

All calculations are performed instantly in your browser. No data is saved, tracked, or transmitted to any server. This ensures complete privacy and fast performance.

While the calculator provides mathematically accurate VAT/GST calculations, local regulations may have specific rounding rules or reporting requirements. For official filings, always follow the guidance of your local tax authority or a qualified accountant.

This VAT / GST Calculator is built to simplify tax math, reduce errors, and help you make informed financial decisions quickly. Whether you are running a business, managing expenses, or learning how indirect taxes work, this tool offers a clear and reliable solution for everyday tax calculations.

Frequently Asked Questions

How do I add VAT/GST to a price?

Use the "Price + Tax (Forward)" mode. Enter the net price and tax rate, then hit Calculate.

How do I find the tax amount from a price that already includes tax?

Switch to "Price Includes Tax (Reverse)" mode, enter the price that includes tax and the tax rate; the tool will extract the tax and net values.

Is this calculator accurate for invoicing?

Yes, for basic VAT/GST math it is accurate. For legal/tax filings consult your local tax authority or an accountant for rounding rules specific to your jurisdiction.