Free EU + US Business Toolbox — 11 Privacy-First Tools

Which tool do I actually need?

Most visitors arrive with a situation, not a tool name. Here is the shortest path from "I have to do X" to the page that answers it.

I am sending a cross-border invoice

• Selling B2B to another EU business? Work out whether reverse charge applies before you set VAT to 0%. A well-formed VAT number is not the same as a confirmed registration.
• Selling B2C to EU consumers? Check OSS - the EU-wide threshold is €10,000 and destination VAT applies above it.
• Need the document itself? Invoice Generator builds it with EU VAT fields and a single-page PDF.
• Does the recipient require a structured file? UBL E-Invoice Kit creates and structurally checks UBL 2.1 XML.

I need a number, not a document

• VAT-inclusive pricing, or extracting the net from a gross amount - VAT Calculator, 30 jurisdictions.
• Converting an amount for a quote dated today - Currency Converter, live ECB rates with an offline fallback.
• Checking a customer's bank details before you press send - IBAN Validator, mod-97 plus country length check.
• Whether a supplier is VAT-registered right now - VAT Validator: a local format check, then an optional VIES lookup.

Money is moving, or should be

• An invoice is overdue - Late-Payment Calculator, ECB reference rate plus 8 percentage points and the €40 recovery fee.
• Gross-to-net salary maths across states - US Paycheck Calculator.
• A discount ladder that still has to be profitable - Discount Calculator.
• Processing customer personal data - GDPR Generator, an Article 13/14 template.

Where these numbers come from

Tax figures go stale quietly. Every rate, threshold and legal reference on this site traces to a named source rather than being written from memory.

• VAT rates - the European Commission's VAT rates database, cross-checked against each country's own tax authority. The standard rate and the most common reduced rate are listed per country; anything else is available in Custom-rate mode.
• Registration thresholds - national guidance, not EU law. They differ per country, and several are split between a previous-year and a current-year test (Germany, for example, uses €25,000 and €100,000).
• Exchange rates and statutory interest - pulled live from the European Central Bank when the tool is online, with a stored fallback for offline use.
• Legal references - article numbers quoted from the EU VAT Directive 2006/112/EC, and the ViDA timeline from Commission material.

Last verified: 25 September 2026. The site is reviewed quarterly and the changelog records every correction, including the ones that made an earlier version wrong.

What these tools will not tell you

A calculator that never says "it depends" is misleading you. Four limits worth knowing before you rely on any figure here.

• This is not tax, legal or accounting advice. These are calculation aids. For a filing decision, confirm with your authority or your accountant.
• A well-formed VAT number is not a verified one. The format check is local arithmetic. A VIES result shows the status at the moment you looked - it does not establish that the supply qualifies for reverse charge, and it is not an obligation you have met.
• EU law sets the framework; countries fill in the detail. Invoice deadlines, filing dates, forms and reduced-rate conditions are national. The VAT Directive provides the structure, Member State law provides the detail.
• Cross-border treatment turns on facts no form can see. Where the customer is established, what the supply actually is, and whether you have a fixed establishment in that country all change the answer.

Figures shown are a snapshot for 2026. Confirm with your local authority before filing.

📘 EU VAT in 60 seconds

Rates 17% LU → 27% HU. B2B services → reverse charge €0. B2C distance >€10k → OSS destination VAT. ViDA phases in nationally through the late 2020s; EU-wide digital reporting follows from 2030. Details in each tool + blog guides.