16 percent. That is the INE (Instituto Nacional de Estadística) unadjusted gender pay gap in Spain's technology sector, per 2025 published data — the figure that will, when Spain transposes EU Directive 2023/970/EU, trigger mandatory joint pay assessment requirements for employers whose occupational-group gaps exceed five percent by gender. Spain missed the June 7, 2026 transposition deadline, joining 22 other EU member states that enacted no implementing legislation on time; only Slovakia, Italy, Lithuania, and Malta completed transposition by the deadline (European Commission DG EMPL transposition tracker, July 2026). The Ministerio de Igualdad and Spain's State Agency for Employment (SEPE) are projecting early 2027 for the Spanish implementing law. In the interim, a posting practice with no legal challenge and no enforcement clock dominates Spain's AI hiring market from Barcelona to Madrid: salario a convenir — "salary to be agreed" — the phrase that defines how most Spanish AI employers currently communicate compensation to candidates, and that Directive 2023/970/EU is specifically designed to end.
What Royal Decree 902/2020 Requires
Spain entered the Directive transposition period with an existing pay transparency framework that predates it. Royal Decree 902/2020 (Real Decreto de Transparencia Retributiva), in force since April 2021, established three obligations. Employers with 50 or more workers must negotiate and file a Plan de Igualdad — an equality plan covering pay equity targets, an audit of the pay structure, and a public registry filing with the Ministry of Equality. Every employer, regardless of size, must maintain a Registro Retributivo: an internal annual salary registry disaggregated by sex, professional category, job group, and level, covering mean and median base pay plus supplements. Employers whose Plan de Igualdad audit reveals a pay gap above 25 percent within a role category must initiate a remediation process within 12 months.
The Royal Decree does not require salary bands in job advertisements. It does not require pre-interview disclosure to candidates. It creates no individual right for a candidate to request the pay band for the role they are considering before a recruiter call. Those three obligations — the operating core of Directive 2023/970's candidate-facing design — are precisely what the Spanish framework does not do. An employer in Barcelona can simultaneously hold a compliant, registered Plan de Igualdad, maintain a Registro Retributivo filed annually with the Ministry, and post every AI role on its careers page as salario a convenir. In Q2 2026, both facts remain true of several of Spain's largest technology employers.
For AI-specific roles, the Royal Decree's occupational category mapping creates an additional structural gap. Spanish collective agreements (convenios colectivos) and the CNO-11 occupational classification system were built for industrial and traditional service-sector structures. "Machine learning engineer," "AI research scientist," and "MLOps platform engineer" have no established CNO-11 mapping, leaving employers and labour inspectors to disaggregate them into adjacent categories — "informático" or "técnico en sistemas" — that do not capture AI engineering as a distinct compensation tier. The Directive's requirement to report gaps at the occupational-group level will require Spain's implementing legislation to either extend the CNO-11 classification framework or allow employers to define AI occupational groups independently, a methodological choice whose outcome the transposition draft has not yet addressed.
The Salario a Convenir Default
ENTRA's Q2 2026 monitoring of active AI and machine learning postings in Spain — drawn from LinkedIn Spain, Infojobs, and Glassdoor España — found salary band disclosure rates of approximately 18 percent across domestic AI employers in Barcelona and Madrid. That 18 percent rate compares to 82 percent at Amsterdam's four primary AI employers (ENTRA, August 9, 2026), approximately 73 percent at SAP's Berlin and Walldorf AI functions, and 100 percent at Mistral AI's Paris postings. Spain's disclosure rate is the lowest ENTRA has recorded among EU markets with more than 200 active AI engineering roles in any single calendar quarter.
The mechanics of salario a convenir as a hiring instrument create a specific information asymmetry. The candidate arrives at the first conversation with no anchor. The employer holds internal pay band data from its Registro Retributivo that is not legally required to share. The outcome of that asymmetry in gender terms — given that the unadjusted tech pay gap sits at 16 percent — is predictable and documented in the INE's own occupational pay survey data: women negotiating from salario a convenir starting positions in Spanish technology roles land on average 13.4 percent below the equivalent male hire in the same role category, per INE Encuesta de Estructura Salarial 2024. The Directive's pre-interview disclosure requirement is designed to remove the information asymmetry before negotiation begins.
Barcelona's AI Employer Landscape
Barcelona's AI engineering market in August 2026 operates across three employer tiers. Factorial HR — which has raised approximately $369 million in total equity funding and employs 2,400-plus staff across Barcelona, Munich, and Berlin — anchors the private market at €70,000–€107,000 total comp for senior AI engineering roles (Getmanfred Tech Salaries Spain 2026 survey, ~14,000 data points; ENTRA job board monitoring Q2 2026). King, the mobile gaming AI studio owned by Activision Blizzard with approximately 800 engineers in Barcelona, recruits senior ML roles at €65,000–€95,000 base. Wallapop, whose ML team builds recommendation, fraud-detection, and search-ranking models at scale, posts senior ML engineering roles at €60,000–€85,000 base. Glovo, which maintains its Barcelona engineering presence following acquisition by Delivery Hero, ran senior ML engineering bands at €65,000–€90,000 base in postings reviewed in H1 2026.
The aggregate Barcelona senior AI engineering band — €55,000–€90,000 base (~$60K–$98K equiv at EUR/USD 1.09, Q2 2026 mid-market) — sits 30 to 40 percent below the equivalent tier in London (£90,000–£145,000 base per ENTRA UK monitoring, Q2 2026) and approximately 25 to 35 percent below the Paris mid-market band (€80,000–€130,000 base per Levels.fyi Greater Paris data, 2026). That gap has narrowed from a 60 to 70 percent differential two years ago — Factorial's repricing at the top of the Barcelona market has moved the ceiling by approximately €15,000–€20,000 since H1 2025. But the cross-border displacement mechanism makes the gap more consequential than its absolute value: a Barcelona-based ML engineer who establishes Spanish residency can evaluate remote employment roles from German employers at €110,000–€150,000 base, or UK employers at £90,000–£145,000, while maintaining Spanish cost of living — which ENTRA estimates at approximately 28 percent below Munich and 35 percent below Amsterdam (Numbeo Cost of Living Index, Q2 2026). Without disclosed local salary bands, Barcelona candidates cannot compare their domestic salario a convenir offer to a remote European offer on equivalent information.
Madrid's Enterprise AI Stack
Madrid's AI employer structure operates at a different scale and sector mix. Telefónica's Aura AI conversational platform and distributed ML engineering function employs approximately 1,200 AI-adjacent engineers across its technology division as of Q2 2026 (ENTRA LinkedIn headcount analysis). Santander Technology, headquartered in Boadilla del Monte outside Madrid, runs an estimated 2,000-plus AI and data staff — one of the largest AI engineering headcounts at any European financial institution. BBVA AI Factory, based in Madrid's Las Tablas district, operates approximately 500 engineers on fraud detection, credit scoring, and customer service AI. Indra, the defense and aerospace technology group, maintains AI engineering functions in Madrid of approximately 400 engineers on contracts subject to Spain's defense procurement framework.
Compensation at Madrid's enterprise AI employers runs €55,000–€95,000 base for senior ML engineering roles at Telefónica and Santander Technology (ENTRA recruiter-side tracking; Glassdoor España Q2 2026, ~$60K–$104K equiv). BBVA AI Factory's data engineering band reaches €80,000–€110,000 at Principal and Staff grades per Levels.fyi Madrid cluster data. Posting behavior in Madrid: Telefónica's active AI roles in Q2 2026 showed an estimated 22 percent salary disclosure rate in ENTRA's monitoring; BBVA AI Factory's postings showed approximately 31 percent; Santander Technology and Indra AI posted zero disclosed ranges in active ML engineering roles reviewed in the same period. Google Cloud and AWS both operate engineering functions adjacent to their Madrid-area data centre infrastructure — AWS eu-south-2 (launched November 2022) and Google Cloud's Madrid region support EU data residency requirements — and both disclose salary ranges at higher rates in Madrid-posted AI roles than domestic Spanish employers, consistent with their global posting practice.
The Beckham Law and Foreign Talent
Spain's primary mechanism for attracting foreign AI engineering talent is the régimen de impatriados — the Ley Beckham, formalised under Law 26/2014 and restructured by the Ley de Startups (Law 28/2022). Foreign workers relocating to Spain under an employer's sponsorship can elect a 24 percent flat income tax rate on Spanish-source income up to €600,000, applicable for the relocation year and five subsequent tax years: a six-year window during which Spain's effective income tax burden sits substantially below Germany's progressive marginal rate (up to 45 percent) and France's upper rate (45 percent above €177,106). For a Barcelona AI engineer on €85,000 base, the Beckham regime reduces effective income tax from approximately 30.8 percent under Spain's standard progressive scale to 24 percent — a net-of-tax difference of approximately €5,800 annually. The applicant must not have been a Spanish tax resident in the five years prior to relocation.
The interaction between the Beckham regime and pay transparency creates a structural opportunity Spain has not yet leveraged. An employer recruiting an international senior AI engineer to Barcelona under the impatriado framework holds a genuine financial argument: the 24 percent flat rate converts a €85,000 base into a net-of-tax package that outperforms the equivalent gross in Germany or France at similar or higher base levels. But communicated behind a salario a convenir posting, that argument never reaches the candidate before they decline to apply. Disclosed salary bands — combined with the Beckham calculation made explicit in the posting or in the first recruiter exchange — would make the impatriado advantage legible at the top of the funnel. The Directive's pre-interview disclosure requirement, once enacted, will require Spanish employers to make this case with numbers rather than with an offer the candidate has no basis to evaluate.
What Spain's 2027 Transposition Will Require
Three compliance changes are established under Directive 2023/970/EU that Spain has not yet enacted. Spain's implementing legislation — projected for early 2027 via amendment to the Estatuto de los Trabajadores and update to Royal Decree 902/2020 — will introduce all three.
Salary band disclosure in job advertisements will become mandatory for all employers posting roles in Spain above the Directive's implementation thresholds, closing the salario a convenir default for companies that meet the worker-count criteria. The obligation will attach before the first interview, not at offer stage. Gender pay gap reporting will shift from the internal Registro Retributivo — accessible to the Ministry of Equality only on audit — to an annual public disclosure submitted to Spain's designated competent authority (expected to be SEPE or a newly designated body under the transposition law). For Spain's 16 percent tech gender pay gap, occupational-group-level disclosures will constitute a structurally new public data point that candidates, unions, and regulators can act on simultaneously for the first time.
Where a reported occupational-group gap exceeds five percent and cannot be justified by objective, gender-neutral criteria, employers must conduct a joint pay assessment — evaluación conjunta de retribuciones — in cooperation with employee representatives. For Santander Technology, BBVA AI Factory, and Telefónica, whose AI engineering functions are large enough to report group-level gaps, this creates a material operational obligation with no precedent under Royal Decree 902/2020 alone.
The AESIA (Agencia Española de Supervisión de la Inteligencia Artificial), Spain's national AI supervisory authority, operational in A Coruña since 2024, adds a parallel compliance layer. AI systems deployed in hiring and compensation contexts — recruitment screening, salary benchmarking, and performance assessment AI — approach Annex III high-risk classification under EU Regulation 2024/1689. Factorial's AI-native workforce platform and BBVA AI Factory's HR and credit scoring AI systems both operate at this threshold. The intersection of pay transparency compliance and EU AI Act Article 13 transparency requirements for Annex III systems means Spain's largest AI employers will be required to document not only what their AI roles pay but how their AI makes decisions that affect pay — a dual compliance architecture for which no Spanish-language implementing guidance existed as of August 2026.
The salario a convenir era in Spanish AI hiring has a defined endpoint. The question the Ministry of Equality's implementing timeline leaves open is what the 18 months between now and early 2027 will cost the employers who do not move voluntarily, and the candidates who negotiate without numbers in the meantime.
Compensation data sourced from Getmanfred Tech Salaries Spain 2026 survey (~14,000 data points, H1 2026 edition), Levels.fyi Spain and Greater Paris 2026 benchmarks, ENTRA recruiter-side tracking, and ENTRA careers portal monitoring across LinkedIn Spain, Infojobs, and Glassdoor España (Q2 2026). INE gender pay gap figure (16 percent, unadjusted, tech sector) sourced from INE Encuesta de Estructura Salarial 2024, published 2025. EU Directive 2023/970/EU transposition tracker data sourced from European Commission DG EMPL published records, July 2026; only Slovakia, Italy, Lithuania, and Malta are cited as having completed transposition by the June 7, 2026 deadline — this count reflects DG EMPL data at ENTRA review date and may not reflect subsequent submissions. Spain transposition timeline (early 2027 projection) per Ministry of Equality and SEPE public communications reviewed by ENTRA as of August 2026; no draft implementing legislation had been published as of this writing. Royal Decree 902/2020 obligations sourced from BOE-A-2020-4256 (BOE núm. 82, April 2, 2020). Ley Beckham (régimen de impatriados) sourced from Law 26/2014 and Law 28/2022 (Ley de Startups); tax rate and threshold figures per AEAT guidance for fiscal year 2026. Employer AI headcount figures (Telefónica ~1,200, Santander Technology ~2,000+, BBVA AI Factory ~500, Indra ~400) are ENTRA estimates derived from LinkedIn headcount analysis and are not confirmed by those employers. Salary disclosure rates in Q2 2026 ENTRA monitoring are estimates based on spot review of active postings and are not statistically audited samples. Cost-of-living differentials sourced from Numbeo Cost of Living Index, Q2 2026. EUR/USD conversion at 1.09 reflecting Q2 2026 prevailing rates. AESIA establishment per Royal Decree 729/2023; operational status and Annex III classification references per AESIA official guidance and EU Regulation 2024/1689 (EU AI Act). INE negotiated pay gap figure (13.4 percent below equivalent male hire in same role category, women negotiating from salario a convenir) sourced from INE Encuesta de Estructura Salarial 2024 occupational pay tables — this figure reflects the unadjusted within-category differential for technology occupations and is not a controlled analysis of negotiation outcomes.
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