This VAT calculator adds value added tax to a net price or extracts VAT from a gross inclusive amount. Enter the amount, the VAT rate percent, and choose add or extract. Results list net, VAT, and gross so you can match an invoice line.
Freelancers, shops, and buyers use it when a quote is net of tax or when a shelf price already includes VAT. Related money tools on the site include the profit margin calculator when you need margin after tax decisions.
Add mode versus extract mode
Add mode treats the amount as net. Gross equals amount times (1 + rate/100). VAT equals gross minus net. Extract mode treats the amount as gross. Net equals amount divided by (1 + rate/100). VAT is gross minus net.
Worked example (add mode)
Amount 100, rate 20 percent, add mode. VAT = 20. Gross = 120.
| Item | Value |
|---|---|
| Net | 100 |
| VAT rate | 20% |
| VAT | 20 |
| Gross | 120 |
How to use the calculator
- Enter the money figure from your quote or receipt.
- Enter the VAT percent that applies to that line.
- Pick add when the figure is before tax.
- Pick extract when the figure already includes VAT.
- Read net, VAT, and gross together.
Business uses
Sellers check that a customer facing gross matches policy. Buyers reverse engineer a VAT inclusive total to see the taxable base. Bookkeepers spot check whether a PDF total matches the stated rate.
For U.S. checkout style math with similar add on percent logic, see the sales tax calculator page on this site when that wording fits better than VAT.
Rates and mixed carts
Many regions use more than one VAT rate. Calculate each line at its own rate, then sum. Do not average rates across unlike goods unless your tax rules explicitly allow a blended approach.
Common mistakes
- Using extract when the amount was net, which understates tax
- Applying a standard rate to a reduced or exempt line
- Rounding line by line differently than the accounting system
- Mixing currencies in one amount field
Quotes, invoices, and customer communication
State clearly whether prices are net or gross. Buyers who assume gross when you meant net feel blindsided at checkout. Sellers who forget to add VAT underprice the job. Run add mode on every net line before you send a customer facing total.
When a marketplace shows a VAT inclusive number, extract mode helps you see the net base for margin math. Keep a note of the rate used on that date in case rates change later.
Rounding and multi line carts
Accounting systems may round per line or on the document total. Two cent gaps between this calculator and an invoice usually come from rounding order, not from a wrong rate. If gaps are large, recheck whether shipping, discounts, or mixed rates were included.
Discounts applied before VAT change the taxable base. Discounts applied after VAT follow different local rules. Match the sequence your books use instead of inventing a hybrid.
Cross border caution
Place of supply, reverse charge, and threshold rules can change who charges VAT. This calculator will happily apply any percent you type. It cannot decide whether you should charge that percent. When goods or services cross borders, confirm the rule set before you trust a gross total.
- Domestic B2C with a clear standard rate: add mode is usually straightforward.
- B2B reverse charge: the arithmetic may show zero VAT on the seller invoice even though the buyer accounts for it.
- Mixed rate carts: split lines; do not blend rates casually.
Keep VAT math next to margin planning. A healthy net margin can disappear if you accidentally treat a gross price as net when comparing cost. The VAT calculator keeps those layers visible so pricing decisions stay honest.
Discounts, credit notes, and corrections
If you issue a credit note for a returned item, reverse net and VAT in the same structure you used on the original invoice. Extract mode helps when the customer only quotes the gross refund they expect. Add mode helps when your books store net line values and need VAT reapplied at the original rate.
Rate changes between quote and invoice create disputes. Timestamp the rate you used on long lived quotes, and recalculate if the statutory rate changes before acceptance.
Limitations
The calculator does not file returns, handle reverse charge, or decide place of supply. It only applies the percent math for the mode you select.