# Calculate an invoice with VAT

Calculator: https://goldmary.eu/en/calculators/factuur-uitrekenen. Updated 24 September 2026.

Enter your hours, your rate and the VAT rate. You see the subtotal, the VAT and the total for your invoice.

## Use it with a URL

GET https://goldmary.eu/en/calculators/factuur-uitrekenen?uren=10&tarief=75&btw=21&korting=50

Fields:

- `uren`: Number of hours
- `tarief`: Rate per hour
- `btw`: VAT rate (21, 9, 0, verlegd)
- `korting`: Discount in euros

Result of this example:

The total is €847.00.
- 10 hours × €75.00: €750.00
- Discount: − €50.00
- Subtotal: €700.00
- VAT (21%): €147.00
- Total: €847.00

## How to calculate an invoice

| Line | Formula |
| --- | --- |
| Amount for the hours | hours × rate per hour |
| Subtotal | amount for the hours minus the discount |
| VAT | subtotal × 21% (or 9%, 0% or reverse charge) |
| Total | subtotal + VAT |

An example. You work 10 hours at €75.00 per hour and give €50.00 discount. The subtotal is €750.00 minus €50.00 = €700.00. The VAT is 21% of €700.00 = €147.00. The total on the invoice is €847.00.

## Reverse charge: what the invoice must show

If you reverse charge the VAT to your client, you charge no VAT. Put the words reverse charge VAT (btw verlegd) and the VAT identification number of your client on the invoice. Also read [when to reverse charge VAT](https://goldmary.eu/en/blog/btw-verlegd) and [what an invoice must contain](https://goldmary.eu/en/blog/factuur-eisen).

## Questions

### When do I choose 0% VAT?

For export of goods outside the EU and for goods you supply to businesses in other EU countries. You usually invoice services to businesses in other EU countries with reverse charge VAT. For services in the Netherlands, 21% or 9% almost always applies.

### Does the discount come off before or after the VAT?

This calculator subtracts the discount first and then calculates the VAT on the lower amount.

### What do I put on the invoice with reverse charge VAT?

The words reverse charge VAT (btw verlegd) and the VAT identification number of your client. You charge no VAT. In your return the turnover goes in section 1e (reverse charged within the Netherlands) or 3b (services to businesses in other EU countries).

### Is what I enter stored?

No. The calculation happens when the page loads and nothing is stored.

## Sources

- [Belastingdienst: Invoice requirements (in Dutch)](https://www.belastingdienst.nl/wps/wcm/connect/bldcontentnl/belastingdienst/zakelijk/btw/administratie_bijhouden/facturen_maken/factuureisen/factuureisen)
- [Belastingdienst: How does reverse charge VAT work? (in Dutch)](https://www.belastingdienst.nl/wps/wcm/connect/bldcontentnl/belastingdienst/zakelijk/btw/btw_berekenen_aan_uw_klanten/waarover_btw_berekenen/verleggingsregeling/hoe_werkt_btw_verleggen)
- [Belastingdienst: Rates and exemptions (in Dutch)](https://www.belastingdienst.nl/wps/wcm/connect/bldcontentnl/belastingdienst/zakelijk/btw/tarieven_en_vrijstellingen/tarieven_en_vrijstellingen)