Billy · Blog SIF-06/2026
Ledger No. 01 / 2026
Status Open

Invoicing diary

Notes on invoices, AI and the fine print of the Spanish tax agency.

Written from the workshop: product, compliance, AI that interprets and code that verifies. No hype, law in hand.

VeriFactu for freelancers: what it is, when it takes effect, and how to prepare before July 2027

The countdown has started. A complete guide to Royal Decree 1007/2023, with the exact dates by taxpayer type, what it demands from your software, and how to avoid penalties without switching accountants.

An AI copilot on every screen, but the code verifies every number

How we separate "interpretation" and "verification" so the AI speeds up your invoicing without you having to review the totals. The rule: the AI proposes, the code checks.

Why we don't charge per invoice: Billy's pricing, explained

Billy costs €0, €9 and €19 per month. No invoice limits on paid tiers. We explain why the "the more you invoice, the more you pay" model is broken for freelancers and small businesses.

A side note

Start free. No credit card.

Set up your company in Billy in under a minute. Issue your first VeriFactu invoice in six. Write fewer emails to your accountant.