FlexiFlow
Available

Proper invoices in a minute

Create and issue invoices with gap-free numbering, a chained hash and a QR code, designed for the Verifactu format. No invoice limit and no card needed.

FreeThe core is free forever. Quotes, pro formas and recurring invoices are in Invoicing Pro.

What it solves

Numbering and chaining by hand

Every invoice is numbered without gaps, linked to the previous one and locked once issued.

Correcting invoices already sent

An issued invoice is never edited: the credit note is generated from the original.

Typing the same details every time

Save clients and products once and fill in the lines with a click.

Features

What it does today

Chained hash and QR

Each invoice carries its SHA-256 hash linked to the previous one, plus a verification QR. You can check the chain whenever you like.

Draft, issued, paid

Edit while it is a draft. Issuing numbers it, chains it and locks it.

VAT, surcharge and income tax

21, 10, 4 and 0 % VAT, equivalence surcharge (recargo de equivalencia) and income-tax withholding (IRPF), with live totals.

Clients and products

Client records with tax ID and address, and a product catalogue that fills in price and VAT.

Credit notes and PDF

A credit note (rectificativa) in one click from the original invoice, and a PDF ready to download.

Quotes, pro formas and recurring Pro

Quotes and pro formas that turn into invoices, and invoices that repeat every month, quarter or year.

How it works
  1. 1

    Pick a client and add lines

  2. 2

    Check the live total and issue

  3. 3

    Download the PDF or mark it as paid

Where it is included

  • Free0 €
  • Freelancer9 €/month
  • Complete29 €/month
See all pricing

What it does not do yet

It generates the hash and QR but does not yet send records to the Spanish tax agency. No custom series, delivery notes, client portal or online payment yet.

Start today with free invoicing. The rest, when you need it.