PSD3 leans on harmonised enforcement because fragmented rules make cross-border payment oversight inconsistent and expensive to operate. Directly applicable regulations reduce member state variation, while stronger penalties improve accountability. For practitioners, the benefit is clearer implementation standards, fewer interpretation gaps, and a more predictable operating model for banks, non-banks, and open banking participants.
Why harmonised enforcement matters in PSD3
PSD3 matters because payments are inherently cross-border, but supervision often has been national. If enforcement differs materially by member state, firms face inconsistent obligations, uneven remediation pressure, and higher compliance costs. Harmonised enforcement is intended to make the rulebook more operationally predictable, so banks, non-banks, and open banking participants can build to one regulatory baseline instead of many.
A single enforcement approach also reduces the chance that similar conduct is treated differently depending on where a firm is licensed or supervised. That matters in payments because service models, outsourcing, fraud controls, and open banking dependencies often span jurisdictions. Harmonisation is therefore not just about legal neatness, it is about making oversight workable at EU scale.
Strong enforcement also supports market integrity. When penalties, supervision expectations, and remediation timelines diverge, weaker jurisdictions can become attractive locations for lower-friction compliance or slower corrective action. PSD3 leans toward consistency so supervisory arbitrage is harder and firms cannot treat regulatory variability as part of their operating model.
What harmonised enforcement changes for regulated firms
For practitioners, harmonised enforcement changes three things at once: how controls are interpreted, how exceptions are handled, and how quickly issues must be fixed. That lowers the cost of operating multiple payment entities, because the same control design can usually be reused with less country-specific tailoring. It also makes internal audit and second-line assurance more meaningful, because findings are less likely to depend on local interpretation alone.
The practical benefit is a clearer pathway from rule to control to evidence. If the enforcement model is uniform, firms can standardise policy wording, issue escalation, incident reporting, and remediation tracking across jurisdictions. That is especially valuable for open banking and third-party arrangements, where a weak link in one country can affect the whole chain of access and trust.
Harmonisation does not remove local supervision entirely, but it narrows the space for material divergence. In practice, that means compliance teams should expect more emphasis on demonstrable control effectiveness and less tolerance for explain-aways based on local custom. The operating assumption shifts from "same directive, different practice" to "same rule, similar outcome."
Why PSD3 needs stronger penalties and clearer standards
PSD3’s enforcement emphasis reflects a simple supervisory reality: rules without credible consequences tend to produce uneven adoption. Penalties are part of the accountability model, while clearer standards reduce ambiguity about what “good” looks like. Together, they make it easier for supervisors to identify persistent non-compliance and harder for firms to argue that the requirement was too open to interpretation.
This also helps when firms operate across multiple regulated activities. Payment institutions, banks, and open banking participants may each have different internal control maturity, but if the enforcement baseline is aligned, the externally visible expectation stays stable. That matters for governance, because boards need a defensible way to compare risk across entities rather than relying on country-by-country judgment calls.
For a useful parallel, EU supervisors have increasingly leaned on harmonised enforcement in adjacent regulatory areas to reduce fragmentation and improve accountability. In payments, that logic supports a more predictable supervisory environment, especially where cross-border services and outsourcing can otherwise create gaps between rule intent and operational reality.
Risk and Threat Considerations
Fragmented enforcement creates compliance drift, supervisory arbitrage, and uneven remediation timing. In a cross-border payment environment, that can leave control weaknesses unresolved for longer in the weakest jurisdiction, while also making it harder for firms to prove consistent oversight across the group.
Failure mechanism: When member states interpret or enforce similar PSD3 obligations differently, firms optimise to the least demanding path, control baselines diverge, and remediation can stall behind local process friction rather than business risk.
Impact: The result is inconsistent customer protection, higher operating cost, weaker governance evidence, and a larger chance that cross-border payment failures or misconduct persist before they are corrected.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST CSF 2.0 and NIST SP 800-53 Rev 5 set the technical controls, while ISO/IEC 27001:2022, NIS2 and DORA define the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.OV-01 — Oversight of cybersecurity risk management | PSD3 enforcement consistency depends on clear supervisory oversight across jurisdictions. |
| Recommendation — Align governance oversight so cross-border payment controls are interpreted and reviewed consistently. | ||
| NIST SP 800-53 Rev 5 | CA-2 — Control Assessments | Harmonised enforcement relies on repeatable assessment evidence across entities and member states. |
| Recommendation — Standardize control assessments so the same compliance evidence is accepted across operating units. | ||
| ISO/IEC 27001:2022 | A.5.31 — Legal, statutory, regulatory and contractual requirements | PSD3 creates regulatory obligations that need consistent interpretation across jurisdictions. |
| Recommendation — Map PSD3 obligations into a single compliance register and maintain jurisdiction-specific deltas only where required. | ||
| NIS2 | Enforcement and governance obligations | It is an EU regulatory model that illustrates why harmonised enforcement reduces fragmented supervision. |
| Recommendation — Use common supervisory expectations to reduce inconsistent enforcement outcomes across member states. | ||
| DORA | Operational resilience and ICT governance | Cross-border financial oversight benefits from uniform enforcement of resilience and incident obligations. |
| Recommendation — Apply one resilience control standard so incident handling and remediation stay comparable across entities. | ||
Practitioner Guidance
What to prioritise: Build one group-wide control interpretation for PSD3 obligations, then document only the minimal local overlays that genuinely differ. If a local requirement changes the control outcome, treat it as a design change, not a wording change.
What to verify: Check whether your policies, testing, and issue-management workflow produce the same evidence across jurisdictions, especially for incident escalation, outsourcing oversight, and recurring control exceptions. If the answer varies by country, the enforcement model is not yet harmonised inside the firm.
Practitioner takeaway: The real value of harmonised enforcement is not just lower legal friction, it is a single supervisory standard that makes controls auditable, comparisons fairer, and remediation faster.
Related resources from NHI Mgmt Group
- How should security teams make NHI best practices usable across the business?
- Why do financial services organisations place so much emphasis on recovery testing?
- Why does DPDPA place so much emphasis on consent governance?
- Why does SOC 2 Type II place so much emphasis on continuous monitoring rather than point-in-time control design?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 26, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
