About the Invoice
An invoice is a demand for payment, and in most jurisdictions a tax invoice is a regulated document: it must carry the supplier's tax registration, a sequential number, the tax charged at each rate, and the date payment is due.
OpenDocuHub builds that document with multiple tax rates, compound taxes, withholding and retainage, bank remittance details and a scannable payment QR. It runs entirely in your browser, so your client list never leaves your machine.
How to issue it
Scope and line items
Add items, quantities and unit rates with optional tax and discounts.
Calculate and tax
Verify subtotal, tax breakdown, withholding and balance due.
Export vector PDF
Render an unwatermarked PDF directly in your browser without an upload.
Convert or archive
Store locally in your vault or advance to the next lifecycle document.
Questions about invoice
What must a tax invoice contain?
Generally: the words tax invoice, a unique sequential number, issue date, supplier name and tax registration, customer name, description and quantity of goods or services, the taxable amount per rate, the tax amount, and the total.
How do I invoice across EU borders?
With a valid VAT number on both sides, the supply is zero-rated under the reverse charge. The invoice must show both VAT IDs and the Article 196 notice - OpenDocuHub inserts it automatically.
What is retainage on an invoice?
A percentage held back by the client until the project is complete, common in construction. It is not a discount: it stays payable. The invoice shows the amount held and the net now due.
Can I invoice without a registered business?
In most jurisdictions yes, as a sole trader, but you cannot charge VAT or GST without registration. Use the Kleinunternehmer or non-registered mode and the tax column is removed.
Is the invoice PDF really generated locally?
Yes. pdf-lib assembles the vector document in browser memory. No invoice data is posted to a server, which is why the tool works offline.