Tax Calculator
Works in both directions for sales tax, VAT and GST: build a price up from net, or work backwards from a tax-inclusive total. Pick a mode, enter the amount and rate, and the net, tax and gross breakdown updates instantly.
Plain English
How it works
- Decide whether your figure already includes tax.
- To add tax, multiply the net amount by 1 plus the rate as a decimal.
- To remove tax, divide the gross amount by that same factor — do not simply subtract the percentage.
See it in action
Worked examples
$120 including 20% VAT (remove the tax)
- Divide by 1 + rate: 120 ÷ 1.20 = $100.00 net
- Tax removed: 120 − 100.00 = $20.00
Answer: Net $100.00, VAT $20.00
Extracting the tax-exclusive price from a VAT-inclusive receipt for accounting or expense claims.
$500 item with 8% sales tax (add the tax)
- Tax: 500 × 8% = 500 × 0.08 = $40.00
- Gross: 500 + 40.00 = $540.00
Answer: Tax $40.00, gross $540.00
Building up a US sales-tax-inclusive price from a listed net price at checkout.
$1,000 purchase with 15% tax (add the tax)
- Tax: 1,000 × 15% = 1,000 × 0.15 = $150.00
- Gross: 1,000 + 150.00 = $1,150.00
Answer: Tax $150.00, gross $1,150.00
Quoting a tax-inclusive total on an invoice in a region with a 15% VAT or GST rate.
$75 meal with 10% tax (add the tax)
- Tax: 75 × 10% = 75 × 0.10 = $7.50
- Gross: 75 + 7.50 = $82.50
Answer: Tax $7.50, gross $82.50
Adding a service tax or local meal tax to a restaurant bill total.
$2,000 with 25% tax (add the tax)
- Tax: 2,000 × 25% = 2,000 × 0.25 = $500.00
- Gross: 2,000 + 500.00 = $2,500.00
Answer: Tax $500.00, gross $2,500.00
A high-rate jurisdiction invoice, or a quick sanity check on a quoted tax-inclusive figure.
Answers
Frequently asked questions
How do I remove tax from a total?
Divide the gross figure by 1 plus the tax rate as a decimal. For 20%, divide by 1.2.
What is the difference between net and gross?
Net is the price before tax. Gross is the price the customer actually pays, tax included.
Can I use this for VAT and GST?
Yes. The arithmetic is identical for any single-rate consumption tax.
Does it handle fractional rates like 8.25%?
Yes, any decimal rate works and results are shown to the cent.
Keep going