Board
One date, not two
The roadmap follows the gazette. The Ministry note is watched, not executed.
What the vendor and the accountancy firm must be able to show before 1 January 2027, and how one partner carries billing, banks and tax.
Technical analysis

Globodain's reading
The legal date for companies is still 1 January 2027: the delay to October 2028 is announced, not published.
Official gazette, RD 1007/2023 | Ministry of Finance, 5 Oct 2026
What is in the official gazette and what the Ministry has said it intends to change. A note does not amend a regulation.
29 Jul 2025
Nine months from the technical order: the producer had to offer an adapted system.
RD 1007/2023, final provision 4 | Order HAC/1177/2024
5 Oct 2026
A note intends to move the pending duties to October 2028. It is not a statute.
Ministry of Finance, note of 5 Oct 2026
1 Jan 2027
Corporate-tax payers must have the system adapted before that day.
RD 1007/2023, final provision 4 (RDL 15/2025), art. 3.1.a
1 Jul 2027
Everyone else in article 3.1 must have the system running before that date.
RD 1007/2023, final provision 4 (RDL 15/2025)
What this profile pays for today
The question from the practice or the sole trader, the article behind it, and what a technology partner leaves ready.
What they ask
The rule
What we prepare
01Is the invoice chained?
RD 1007/2023: integrity, fingerprint and retention
What we prepare |The issue and cancellation records, checkable
02Where is the declaration?
Art. 13: visible in the system, on every version
What we prepare |The declaration findable by the client and the tax agency
03Which date do I build for?
Final provision 4: 1 Jan 2027 and 1 Jul 2027, still in the gazette
What we prepare |The product ready for the legal date, not for the note
04Who sees the invoices?
GDPR: the business is controller, the software is processor
What we prepare |The firm's access, processors and retention
The same counterpart covers the billing record, the banks, the accountancy firm and the evidence the client asks for.
Board
The roadmap follows the gazette. The Ministry note is watched, not executed.
Accountancy firms
Opening a new client does not reopen the design of the record.
Technical team
Reinforcement on records, data and integrations, without replacing the team.
What changes when the record, the declaration and the bank connections stop being rebuilt per client.
×1.7
clients the product can serve by the end of the period, versus staying without a partner
−23 pts
of technical time that returns to product and accountancy firms
6 → 1
technical areas, one counterpart
Illustrative scenario, not a forecast. Index 100 = clients the product can serve in Nov 2026. Assumption: freed time goes back to product and to signing accountancy firms.
The dates are from the gazette and the Ministry. The scale is one product in the sector, cited with its source.
1 Jan 2027
companies must have the system adapted; everyone else, before 1 July 2027
Official gazette, RD 1007
Oct 2028
the Ministry announces a delay that is not yet published in the gazette
Ministry of Finance
1,266
accountancy firms run more than 21,000 companies on one product in the sector
Forbes, 21 Sep 2026
Firms in the sector
A product that bills for the sole trader, the company and the firm that serves both has more technical surface than one that only emits a PDF.

Each version of the software ships with the declaration and the record in place.
Phase 01
Records, declaration, banks, the firm's access and data.
Phase 02
A report the board and the practice can both show.
Phase 03
We fix it with their team, without replacing it.
Phase 04
A warning the day the delay, if it comes, is published.
01
The team builds against the gazette and watches the note, without mixing them.
02
Every version can be found, as article 13 requires.
03
A new accountancy practice joins the same platform.
04
The movement and the invoice do not live in two places.
05
Billing, tax, treasury and accountancy firms, one relationship.
06
Technical time goes back to sign-ups and the roadmap.
What we bring
What we do not do
The declaration of responsibility is signed by the producer of the system. Tax advice belongs to third parties. We provide technology support: audit, implementation and watch.
Scope note: mentioning regulated environments describes applicable capabilities, not a proven track record in billing software.
Issue, cancellation, fingerprint and retention, checkable.
Every version findable, as article 13 requires.
The firm's access, processors and retention.
Banks and collections on the same data as the invoice.
A report the practice can show its client.
A warning the day a note becomes the gazette.
This analysis was built from public sources on the sector. If yours looks similar, Rubén Ayuso will analyse it with you and prepare one for your case.
A study built from public sources on the sector. It does not describe a specific company and was not prepared with one. The companies named are examples: it implies no relationship and no involvement on their part. It is not legal advice and not a contractual commitment.
