title: LU — Scheme & Network Compliance (W4) | World Payments Monitor canonical: https://payments.gi/jurisdictions/luxembourg/w4/ ### W4 Scheme & Network Compliance 1 gap Probable re-verified 2026-10-18 · changed 2026-09-28 Card-scheme compliance in Luxembourg is governed by the EU Interchange Fee Regulation (Regulation (EU) 2015/751), which caps interchange and prohibits territorial/scheme-processing discrimination, with member states designating competent authorities. PCI DSS applies to acquirers/processors (e.g. Worldline PCI-certified gateways). Instant-rail scheme rules follow the EPC SCT Inst rulebook and the Verification of Payee scheme. The IFR requires scheme/processing separation overseen via a Government Expert Group. Open gap — wpm-int-1 No LU-specific scheme rule change (W4) located this cycle._ART issuance under MiCAR Title III may be present but uncovered; sources weighted to EMT issuers._ Horizon · 2027-04-09 Speculative Mandatory instant euro transfer full-obligation deadline_Proposed_ Standing sub-brief · as of 27 June 2026 150 words · last cycle 2026-10-04 #### Scheme & Network Compliance The Interchange Fee Regulation (Regulation (EU) 2015/751) governs card-scheme compliance in Luxembourg. It prohibits honour-all-cards rules beyond same-brand/category exceptions, bans territorial discrimination in processing, requires scheme/processing interoperability, and obliges member states to designate competent enforcement authorities. The IFR's interchange caps and scheme/processing separation shape card economics and acceptance costs for Luxembourg merchants and acquirers, and the regime applies across both bank and non-bank acquirers. This is a stable module. The IFR framework is settled and there is no forward-dated rule change registered for the card-scheme layer in this cycle; the substantive card-acceptance and acquiring dynamics are carried in W8. #### Outlook W4 trajectory is stable. The interchange-cap and scheme/processing-separation framework is in force and unchanged, with PCI DSS and 3DS-SCA applied as the operational scheme-compliance baseline. No proximate change is flagged; the module functions as standing infrastructure against which the more kinetic acquiring and corridor modules operate. Periodic update · new data 2026-09-28 #### Scheme & Network Compliance Luxembourg's implementing bill for Regulation (EU) 2024/886, the Instant Payments Regulation, requires PSPs that offer regular euro credit transfers to also offer instant euro transfers, covering both sending and receiving, by 9 April 2027. Critically, the instant transfer offering must be priced at no higher charge than standard, non-instant transfers, removing the pricing differential that has historically discouraged instant-transfer adoption. This is a scheme-and-network-level obligation applying across the payments industry in Luxembourg, distinct from the institution-specific governance and prudential obligations addressed elsewhere this cycle. This development is corroborated by specialist law-firm commentary interpreting a confirmed EU-level instrument, giving reasonable confidence in the substance of the obligation, though the precise Luxembourg-specific implementing bill text was not independently retrieved this cycle. The 9 April 2027 deadline for mandatory instant euro transfer offering at parity pricing is the key date to track. In the intervening period, watch for any CSSF or industry guidance on operational readiness for 24/7 instant transfer processing across Luxembourg's payment-services industry. **Sources and findings (4 unique sources · R-3/R-4)** 1. [W4-E1] T1 Derived: Confirmed [in_force https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32015R0751](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32015R0751) re-verified 2026-06-27 The Interchange Fee Regulation prohibits honour-all-cards rules beyond same-brand/category exceptions, bans territorial discrimination in processing, requires scheme/processing interoperability, and obliges member states to designate competent enforcement authorities. 2. [W4-E2] T1 Derived: Confirmed [in_force https://www.ecb.europa.eu/paym/retail/sepa/html/index.en.html](https://www.ecb.europa.eu/paym/retail/sepa/html/index.en.html) re-verified 2026-06-27 EU legislation harmonises and caps interchange fees for card payments across the EU/EEA and ensures cross-border euro payments are no more expensive than domestic ones, though these EU rules do not extend to non-EU/EEA SEPA countries. 3. [W4-E3] T1 Derived: Confirmed [in_force https://competition-policy.ec.europa.eu/system/files/2021-10/IFR_report_card_payment.pdf](https://competition-policy.ec.europa.eu/system/files/2021-10/IFR_report_card_payment.pdf) re-verified 2026-06-27 Consistent IFR application is promoted through a Government Expert Group and an NCA Memorandum of Understanding monitoring scheme/processing separation; a merchant survey covering Luxembourg found roughly 60% of merchants pass through interchange savings. 4. [W4-E4] T3 Derived: Probable [in_force https://worldline.com/en-lu/home/main-navigation/solutions/merchants/acquiring](https://worldline.com/en-lu/home/main-navigation/solutions/merchants/acquiring) re-verified 2026-06-27 Worldline Luxembourg acquiring supports 3D Secure/SCA and PSD2 SCA exemptions (low-value, MIT, TRA) with PCI DSS certification, illustrating scheme-mandated technical standards in force for card acceptance.