Kit Digital for e-invoicing: how to apply the grant to AP automation

When a Spanish SME searches for "Kit Digital e-invoicing" it usually finds manuals written for the issuer: software onboarding, signature validation, sending FacturaE to the customer. The receiver side barely appears. Yet the received e-invoice is the other half of the workflow, and since 2026 it is the real bottleneck for most companies with high supplier volume. This guide explains what the grant covers, which categories fit AP automation on the receiver side, what Red.es (the Spanish program agency) requires and how ininvoice fits when the goal is to control inbound invoices rather than the issued ones.

What does Kit Digital cover in 2026?

Kit Digital is the Spanish public digitalization program for SMEs and freelancers. It is funded by EU Next Generation funds and managed by Red.es and the Secretary of State for Digitalization and AI. The official site and solution catalog are at acelerapyme.gob.es.

The program runs on three parts: the digital voucher (fixed amount per company according to size), the solution catalog (official categories with minimum requirements) and the network of accredited digital agents (companies that deliver the solution). The SME does not receive the money directly. It applies for the voucher, picks a solution from the catalog, signs the contract with the agent, and the agent gets paid by Red.es against the justification.

Amounts by segment

The voucher is allocated by size segment. Reference amounts for 2026:

Segment	Size	Voucher amount
Segment 0	Freelancer with no employees	2,000 EUR [VERIFY: current figure 2026 call]
Segment I	Small company 10-49 employees	12,000 EUR [VERIFY: current figure 2026 call]
Segment II	Small company 3-9 employees	6,000 EUR [VERIFY: current figure 2026 call]
Segment III	Micro-company 1-2 employees	2,000 EUR [VERIFY: current figure 2026 call]
Segment IV	Medium company 50-99 employees	25,000 EUR [VERIFY: expanded 2026 call]
Segment V	Medium company 100-249 employees	29,000 EUR [VERIFY: expanded 2026 call]

The naming of segments has changed across calls. Previously Segment I was the largest; now the order depends on the active version. Any figure in this table must be checked against the official Acelera Pyme site before applying, because calls get expanded and amounts get updated.

Official categories relevant to e-invoicing

Within the catalog, three categories have a direct fit for e-invoicing:

• E-Invoice. Covers issuance and reception of invoices in structured format (FacturaE, UBL, EDIFACT). Originally designed as an issuer solution, the category sheet itself lists reception as a minimum feature. This is the category where an inbound FacturaE capture solution fits with the least friction.
• Process Management. Covers automation of administrative processes: billing, accounting, HR, purchasing. The full accounts payable workflow fits here (document reception, OCR, matching against PO and delivery note, approval, ERP export).
• Virtual Office Services and Tools. Covers productivity and document management. Marginal for AP automation, but it can complement invoice archiving and collaboration between admin and purchasing.

For a receiving SME, the natural combination is E-Invoice + Process Management. The first covers the ingestion of the structured document. The second covers the validation logic against POs and the integration with the management software.

The receiver-side gap in Kit Digital

The program, both in its wording and its outreach, is biased toward the issuer. Most digital agents listed in the "E-Invoice" category sell point-of-sale, billing software or accounting tools whose primary function is to issue. The receiver part is treated as an attachment: "supports importing invoices in XML format". This leaves uncovered the companies whose real problem is on the input side.

The operational problem is asymmetric. An accounting firm that issues 200 fee invoices per month with an issuance tool solves its flow. A distributor that receives 1,500 supplier invoices a month with inconsistent descriptions, changed IBANs and prices that differ from the POs solves nothing with an issuer. They need automated capture, line reading, three-way matching and a structured inbox.

Kit Digital does allow the voucher to be applied to the receiver side, but it has to be framed correctly. The justification rests on two axes:

• The received invoice is part of the SME's administrative process (falls under Process Management).
• Reception of structured FacturaE is a minimum feature of the E-Invoice category.

An SME that applies the voucher to a solution well-positioned in these two categories is inside the program. The signal that it is being done right is that the contract with the agent explicitly lists reception, not only issuance.

Solution requirements for eligibility

Red.es publishes a sheet per category with the minimum requirements the solution must meet. For an e-invoicing tool to be eligible it must show, at minimum:

• Accredited digital agent. The company providing the service has to be listed in the Red.es registry of digital agents. It is not enough that the software is good: the legal entity that signs the contract with the SME must appear on the official list.
• Bidirectional invoicing. The E-Invoice category sheet requires the solution to support both issuance and reception, in structured formats (FacturaE as a minimum). A pure issuer does not qualify. A receiver-only solution does not either. Both sides must be covered, even if the SME only uses one in practice.
• Integration with management software. The solution has to connect with an ERP or accounting program. Deep integration is not required: a structured export (CSV, XML, API) that lets you load data into the target accounting system is enough. For AP receiver, this means the tool must deliver the reconciled invoice ready to be booked.
• Regulatory compliance. The solution must comply with Verifactu, AEAT and GDPR. For the receiver, this means integral archive of the original document (XML or signed PDF), approval traceability and retention during the legal period (minimum four years, extendable to six in some industries).
• Minimum SLA and support. A twelve-month service period with functional support during business hours. The SME is entitled to training and an incident channel. The agent must document the SLAs in the contract.
• Implementation timeline. The solution has to be operational within a reasonable timeframe from signing. Calls usually set a maximum implementation timeline of three months, although most SaaS solutions can be activated in days.

An SME about to contract a solution should ask the agent for the signed category sheet and the Red.es file reference. If the agent cannot provide it, the solution is not accredited and the voucher will not cover it.

How ininvoice meets the Kit Digital requirements

ininvoice is a pure AP automation solution: ingestion of invoices received by email, line-by-line extraction, three-way matching against PO and delivery note, duplicate detection and ERP export. It is not an invoice issuer or an ERP. This matters for Kit Digital eligibility because the E-Invoice category sheet requires bidirectionality. That is why the cleanest path for a receiving SME is to combine:

• Process Management category to cover automation of the AP workflow (reception, OCR, reconciliation, approval, export).
• E-Invoice category delivered with a partner that contributes the issuance side, if the SME needs that too, while ininvoice covers structured reception.

The functional fit covers the six requirement blocks:

• Bidirectionality. When applied via Process Management, bidirectionality is not required. When applied via E-Invoice, ininvoice covers reception and a partner covers issuance; the contract consolidates both legs.
• Integration with management software. CSV, XML and API export to the ERPs commonly used by Spanish SMEs. The accounting entry leaves already reconciled, not as an invoice pending review.
• Verifactu, AEAT, GDPR. Archive of the original signed document, full approval traceability, retention during the legal period and read-only access to the source mailbox. EU hosting (Frankfurt). Encryption in transit and at rest.
• SLA and support. Twelve-month service period with business-hours support, documented onboarding and user training.
• Implementation timeline. Standard instant activation. The SME connects its mailbox, defines suppliers and approves the first batch in less than a week.
• Justification documentation. Technical memo, contract and evidence of operation are delivered with onboarding so the SME can submit the justification to Red.es with no extra work.

The ininvoice operational plan is 249 EUR/month up to 300 invoices/month. Over twelve months the operating plan adds up to 2,988 EUR. This figure is relevant for two calculations:

• If the SME is in a segment with a voucher of 6,000 EUR or more, the operating plan fits entirely inside the voucher along with the implementation.
• If the SME is in a segment with a smaller voucher, the voucher covers the implementation and the SME pays the operating plan. Even so, the twelve-month return is usually positive when volume exceeds 100 invoices/month.

The pricing page details the full plan, and the three-way matching guide explains the reconciliation logic that backs the tool. To understand the end-to-end flow without manual intervention, the touchless accounts payable piece describes the operating model.

Steps to use the Kit Digital voucher with ininvoice

The operational process, in order and without duplicated forms:

1. Verify the company segment

Before any application, identify the segment. The segment is determined by the headcount averaged over the previous calendar year. A micro-company with two employees belongs to a different segment than an SME with fifteen. The segment drives the voucher amount and, in some cases, which categories are open. This check is done in the simulator at acelerapyme.gob.es.

2. Apply for the voucher at Acelera Pyme

The application is submitted to the Red.es electronic office through the Acelera Pyme portal. It requires a digital certificate or Cl@ve. Typical documentation: tax registration, headcount, declaration of being up to date with tax and Social Security obligations, and signature from the legal representative. Granting usually takes between three weeks and three months depending on the call workload.

3. Pick a digital agent

Once the voucher is granted, the SME picks the solution from the catalog. The search is filtered by category and by agent. For AP automation there are two routes:

• Wait until ininvoice completes its accreditation as a digital agent and contract directly.
• Contract through an already accredited partner agent that includes ininvoice in its catalog, particularly useful when the SME wants to combine issuance and reception in a single contract.

Either route keeps ininvoice as the reception tool. What changes is who signs the contract with the SME and who handles the justification before Red.es.

4. Sign the service agreement

The contract with the digital agent details the category, the functional scope, the SLA, the service period (twelve months) and the price. The SME signs the agreement and authorizes the agent to charge against the voucher. It is important that the contract explicitly includes the functionality of invoice reception, archiving and reconciliation, so the later justification has no gaps.

5. Implementation and training

Connection of the supplier mailbox in read-only mode, loading of the PO catalog, configuration of validation rules, test with a real batch of invoices, training of the admin team and approval of the first close. The standard timeline is plug and play for basic operations and two weeks for steady-state regime.

6. Justification to Red.es

Documentary justification is submitted at the end of the service period. The SME delivers the documentation proving service fulfilment: signed contract, technical memo, evidence of use and conformity declaration. The digital agent prepares most of the package; the SME signs and submits.

2026 calendar

Relevant dates for an SME that wants to apply the voucher to e-invoicing in 2026:

• Open calls. Segment calls open and close in a staggered way throughout the year. Daily check of acelerapyme.gob.es is the only reliable source for deadlines. [VERIFY: specific dates for each 2026 call]
• Mandatory B2B e-invoicing. The mandate for large companies and a staggered calendar for SMEs is defined by the "Crea y Crece" Law. The entry-into-force date depends on the pending regulatory development. [VERIFY: exact B2B 2026 entry-into-force milestone]
• Verifactu. The regulation for verifiable invoicing systems enters into force for companies in January 2026 with an adaptation period. Receiving SMEs must be prepared to store and validate the records generated by their suppliers.
• Kit Digital budget close. The total program quota is finite. When a segment budget runs out, the call closes until a new extension. Applying earlier reduces the risk of running out of quota.

Rule of thumb: if the SME has enough received-invoice volume, it pays to apply for the voucher as early in the year as possible. Waiting for the last quarter to align with the fiscal close often coincides with exhausted quotas.

Verifactu compatibility

The Verifactu regulation and Kit Digital coexist and do not overlap. Kit Digital funds the implementation of solutions. Verifactu imposes requirements on the invoicing system. An AP receiver solution complies with Verifactu if it can prove integral retention of the records received and traceability of their processing.

For a paying SME, the right combination is: the Kit Digital voucher funds the implementation; the solution complies with Verifactu in its archive and validation layer. ininvoice stores the structured XML or the signed PDF exactly as it arrives from the supplier, with no destructive transformation, with an integrity hash and an approval log. The technical compliance layer is described in the Verifactu for paying companies from the reception side guide, which covers the receiver-specific requirements as opposed to the issuer's.

An SME that automates reception with the Kit Digital voucher and keeps the Verifactu archive in the same tool does not need an additional project. What some sell as two separate initiatives is a single workflow if the solution is well designed. That is why it is worth reviewing the 2026 mandatory e-invoice reception guide before signing the contract with the digital agent.

FAQ

Can I use the Kit Digital voucher only for invoice reception, with no issuance?

Yes, if the voucher is applied to the Process Management category, which does not require bidirectionality. If applied to E-Invoice, the category sheet requires support for issuance and reception; the SME covers both legs with the contracted solution, even if it only uses reception in practice.

How much of the voucher can I allocate to the e-invoicing solution?

The maximum amount depends on the segment and the category. Each category has a cap within the total voucher. It is best to consult the active category sheet on Acelera Pyme before committing to the application, because the caps are updated across calls.

Is ininvoice an accredited digital agent in 2026?

The accreditation status is being updated. If the SME has the voucher approved, there are two routes: direct contracting once accreditation is final or contracting through an already accredited partner that integrates ininvoice. In both cases the tool in use is the same.

What happens at the end of the twelve-month service period?

Service continues under the operating plan. ininvoice keeps the plan at 249 EUR/month with no lock-in, with the 300 invoices/month included. The SME can cancel at any time with no contractual penalty.

Does the voucher cover integration with the ERP I already use?

Yes, if the solution is in the applied category and the contract lists the integration as a deliverable. Connection to ERPs common in Spanish SMEs is part of the standard scope; custom integrations may fall outside the voucher and be billed separately.

Can I apply the voucher to several digital agents?

Yes. The voucher amount can be split across solutions in different categories and from different agents, as long as the total allocated is not exceeded and each solution meets its category requirements.

Is Kit Digital compatible with other digital transformation grants?

Generally yes, unless the other grant requires exclusivity on the same concept. It is common to combine Kit Digital with regional digitalization programs. Final verification is up to the specific call and the managing entity.

What is the risk if Red.es rejects the justification at the end of the period?

If the justification is rejected, the digital agent does not get paid by the voucher and the SME does not incur a debt with Red.es, provided the contract does not say otherwise. The operational risk is in hiring agents who do not prepare the file properly. Asking for references and reviewing the contract before signing mitigates this.