Net, Gross and VAT: Getting the Direction of the Calculation Right

If a price includes 27% VAT and you subtract 27% of the gross figure, your net is too low and every downstream number is wrong. This mistake appears in spreadsheets across Europe, and it survives because the error is only a few percent — big enough to matter at year end, small enough to look plausible.

The two formulas

Adding VAT to a net price: gross = net × (1 + rate) — 10,000 at 27% gives 12,700.

Removing VAT from a gross price: net = gross ÷ (1 + rate) — 12,700 at 27% gives 10,000.

Subtracting 27% of 12,700 would give 9,271: off by 729. The reason is that VAT is calculated on the net, not on the gross, so the percentage refers to a smaller base.

The VAT calculator runs both directions and shows the net, the VAT amount and the gross together so the numbers can be pasted straight onto an invoice.

Rates across Europe

Standard rates range from 17% in Luxembourg to 27% in Hungary, with reduced rates for food, books, medicine and accommodation in most countries. Always check the reduced rate for your specific product category — applying the standard rate to a reduced-rate item is a refund your customer is entitled to.

Rounding rules

Round at the line level, not at the end, and round to the currency's smallest unit. Where a jurisdiction requires the total VAT to be shown per rate band, group the lines by rate first. Rounding at the end can leave a one-cent mismatch between your invoice and the customer's accounting system, which is enough for automated matching to fail.

Checking an invoice quickly

Take the VAT amount, divide it by the net, and confirm you get the rate. If not, the invoice has an error — usually a line entered as gross among net lines.

Related

For personal budgeting, the salary calculator covers the gross-to-net direction on wages; the percentage calculator handles the general case of increase, decrease and reverse percentages.

FAQ

What is reverse VAT? Calculating the net from a VAT-inclusive price, as above.

Do I charge VAT to a business in another EU country? Usually not, under the reverse-charge mechanism, if they supply a valid VAT number. Verify it before invoicing.

Which rate applies to digital services? The customer's country rate for consumers in the EU. Check the current rules for your case.