How to use this tool
- Choose whether you are adding tax to a price or removing it from a total.
- Pick a preset (UK VAT, India GST or a US state) or type your own rate.
- Read the net price, tax amount and total. For GST the CGST/SGST split is shown.
Quick divisors
| GST rate | Divide inclusive price by | GST share of total |
|---|---|---|
| 5% | 1.05 | 4.76% |
| 18% | 1.18 | 15.25% |
| 40% | 1.40 | 28.57% |
A common error is taking 18% off the total, which overstates the GST. Retailers and accountants use the reverse calculation to split MRP-inclusive sales into taxable value and tax.
Frequently asked questions
How do I remove 18% GST from a price?
Divide by 1.18. The difference is the GST.
How much GST is included in ₹1,000 at 18%?
₹152.54, leaving a base price of ₹847.46.
Does this work for 5% and 40%?
Yes. Choose the slab in the preset box.
Need more detail? See the full Sales Tax, VAT & GST Calculator guide.
Sources and references
- GOV.UK: VAT rates
- GST Council of India: official rate decisions
- CBIC tax information portal: GST notifications
- Tax Foundation: State and local sales tax rates