There is no single certificate that makes a payment business compliant in the United States, United Kingdom, and India. Build a layered program instead: classify every role your organization performs, map payment and personal-data flows, determine PCI DSS obligations through your acquirer or payment brands, then add the country-specific rules that apply to your authorization status, data locations, customers, and channels.
PCI DSS is the shared card-data security baseline. It does not replace UK GDPR security duties, a US state or sector requirement, or India’s rules for payment-system data storage, non-bank payment-system operators, and digital-payment authentication. The practical goal is a documented scope, controls matched to each role, contracts that govern suppliers, and evidence that remains current when your payment design changes.
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What meeting all three countries actually requires
Start with the organization’s real activities rather than its incorporation country. A company may be a merchant, payment gateway, processor, software provider, data controller, and data processor at the same time. Each role can create a different combination of card-security, privacy, operational-resilience, outsourcing, and authentication duties.
- Use PCI DSS for the card-data layer. It is a global technical and operational baseline for protecting payment account data.
- Determine who requires validation. Payment brands, acquirers, or other organizations running a compliance program decide whether you must comply with or validate against a PCI SSC standard and which evidence they will accept.
- Add jurisdictional overlays. The United States requires a business- and state-specific legal map; UK payment-service providers have Payment Services Regulations and FCA obligations, while UK GDPR applies separately where personal data is involved; India has RBI directions that depend on your role, data flows, operator size, and transaction type.
- Keep proof. Maintain inventories, risk assessments, approvals, access records, scans, tests, incident files, contracts, attestations, and the exact versions of standards and directions used.
Do not describe PCI DSS as a universal national-law safe harbor. Conversely, do not treat outsourcing as an automatic removal of responsibility: a provider can reduce the systems in your card-data environment while leaving you with vendor oversight, validation, and residual security duties.
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Classify your role before choosing controls
Write down every role involved in each payment flow. The following map is a starting point; your acquirer, payment brands, regulators, counsel, and qualified assessor determine the final scope.
| Role | Typical questions | Primary compliance focus |
|---|---|---|
| Merchant | Which channels accept cards or other digital payments? Do systems ever receive, transmit, or store card data? | PCI DSS scope and validation set by the acquiring program; privacy, breach, consumer, and state requirements in each market. |
| Payment gateway or processor | Do you handle cardholder data or sensitive authentication data for other organizations? Can your systems affect a customer’s card-data environment? | PCI DSS controls and assessment evidence; contracts, incident response, resilience, and customer assurance. |
| Acquirer, issuer, or bank | Which payment brands, regulated activities, and jurisdictions are covered? | PCI DSS program obligations plus sectoral financial, privacy, operational, and reporting rules. |
| UK account-information or payment-initiation service provider | Are you seeking or holding FCA authorization or registration under the Payment Services Regulations 2017? | FCA security systems and controls, incident and continuity planning, sensitive-data access, and outsourcing oversight. |
| Authorised Indian non-bank payment-system operator | Are you classified as large, medium, or small under the RBI’s 2024 cyber-resilience directions? | Board-approved cyber policy, technology-risk controls, linked-party oversight, and the phased implementation date for your category. |
| Data controller or processor | Whose purposes determine processing, and which supplier processes data on your instructions? | Appropriate technical and organisational measures, written processor terms, minimisation, breach escalation, and lawful transfers. |
PCI DSS: the shared card-data baseline
The PCI Security Standards Council describes PCI DSS as “a baseline of technical and operational requirements designed to protect payment account data.” Its audience includes merchants, processors, acquirers, issuers, and service providers that store, process, or transmit cardholder data (CHD) or sensitive authentication data (SAD), as well as entities able to affect the security of the cardholder data environment (CDE).
The current PCI SSC standards library identifies PCI DSS v4.0.1 among its materials. Check the live library and supporting documents when you implement controls, because reporting forms, effective dates, and supplemental guidance can change.
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Who decides whether you must validate
PCI SSC does not itself issue a universal legal requirement for every business to obtain a certificate. Organizations managing compliance programs—often a payment brand, acquirer, or other contracting entity—set the obligation and validation route. A merchant’s route depends on its payment channels, transaction profile, acquiring arrangement, and the amount of card data in scope.
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Ask the acquirer or payment brands, in writing, which current Self-Assessment Questionnaire (SAQ), Report on Compliance (ROC), Attestation of Compliance (AOC), external scanning, and assessor requirements apply. Do not select an SAQ solely because a website or vendor says it is the shortest form.
What outsourcing changes—and what it does not
A hosted checkout, tokenization service, or processor can keep card numbers out of some of your systems. That may reduce the CDE, but it does not prove that no systems, people, scripts, integrations, or supplier connections can affect payment security. Confirm the boundary, responsibilities, and evidence with your acquirer and assessor. Keep supplier attestations and monitor the controls you still operate, such as access management, change control, web-page security, incident response, and service-provider oversight.
Assessors and scanning providers
PCI SSC lists Qualified Security Assessors (QSAs), which are independent qualified organizations that perform PCI DSS assessments, and Approved Scanning Vendors (ASVs), which conduct external vulnerability scanning under relevant PCI DSS requirements. Use them when your validation route or risk profile calls for independent assessment; their involvement does not transfer your management responsibility.
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- Classify the legal and payment roles. List merchant, gateway, processor, acquirer, issuer, bank, UK account-information provider, UK payment-initiation provider, Indian non-bank payment-system operator, controller, and processor roles. Record which entity contracts with customers, which entity controls purposes, and which entity operates each system.
- Draw end-to-end data flows. For web, mobile, point-of-sale, phone or mail order, recurring, domestic, and cross-border transactions, record collection points, systems, APIs, logs, backups, support tools, and suppliers. Mark CHD, SAD, authentication data, other personal data, and the country where each item is collected, processed, and stored.
- Set PCI scope and validation. Apply the current PCI DSS and supporting documents to the flow map. Obtain the acquirer or payment-brand decision on scope, SAQ or ROC, AOC, ASV scans, and deadlines. Engage a QSA where required or where independent scoping is prudent.
- Build country overlays. For the US, identify applicable federal, state, sectoral, privacy, breach, and financial requirements with qualified counsel. For the UK, separate FCA/Payment Services Regulations duties from UK GDPR duties. For India, test whether RBI storage, non-bank-operator cyber-resilience, and authentication directions cover your entity and transaction.
- Contract and govern suppliers. Define each party’s data role, security controls, access limits, incident-notification clock, audit evidence, subprocessors, storage locations, continuity measures, deletion or return obligations, and flow-down requirements. Make the contract match the actual architecture, not a generic security schedule.
- Keep dated evidence. Retain asset and data-flow inventories, risk assessments, board or management approvals, access reviews, vulnerability scans, penetration or other security tests, incident records, processor agreements, attestations, and regulator or acquirer correspondence. Note the exact PCI DSS and regulatory versions used.
- Reassess after change. Trigger a review when you add a channel, country, payment provider, recurring-payment feature, acquisition, data type, cloud region, subprocessor, or authentication method. Recheck implementation dates and amendments rather than relying on an old compliance calendar.
United States: make a fact-specific legal map
The available official material establishes PCI DSS as the cross-border card-data baseline and confirms that validation obligations are administered through payment brands, acquirers, or similar compliance programs. It does not provide a complete inventory of US federal and state requirements for an unspecified business. Therefore, neither “PCI DSS is the US law” nor “PCI DSS is not relevant because there is no federal mandate” is a safe conclusion.
What a US organization should document
- Business footprint: states where the organization, employees, customers, and data are located.
- Regulated status: bank, non-bank financial company, money-services business, healthcare or other sector participant, or unregulated merchant.
- Payment activity: card-present, card-not-present, recurring, marketplace, wallet, ACH or other rails, and whether the organization acts for itself or for other businesses.
- Information handled: card data, authentication data, account credentials, identity information, and other personal data.
- Incident duties: which state and sector rules govern notification, records, and regulator or customer communications if a breach occurs.
Use the resulting facts to obtain a state- and sector-specific opinion from counsel or a compliance specialist. Then reconcile that map with the acquirer’s PCI program, because contractual validation can apply even where a particular statute does not mention PCI DSS.
United Kingdom: FCA payment-service rules and UK GDPR are separate layers
FCA requirements for account-information and payment-initiation providers
The FCA security page, first published on 2 February 2017 and last updated on 10 February 2023, addresses providers seeking authorization or registration for account-information services and payment-initiation services under the Payment Services Regulations 2017. It says: “As part of the authorisation and registration process, you will need to demonstrate that you have implemented effective security systems and controls, access to sensitive payment data, incident management and business continuity.”
For an applicant in that scope, prepare evidence covering:
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- security policies and a documented risk assessment;
- processes for detecting, managing, and resolving security incidents and complaints;
- business-continuity arrangements and recovery responsibilities;
- classification of sensitive payment data, access restrictions, monitoring, and review;
- outsourcing arrangements, including how suppliers are assessed and controlled.
After authorization, the provider must identify, classify, and manage risks, detect, manage, and resolve major incidents, and notify the FCA of major incidents. This FCA page is not a blanket authorization checklist for an ordinary merchant that merely accepts payments.
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UK GDPR security duties
Where payment processing involves personal data, UK GDPR is a distinct layer. The Information Commissioner’s Office describes a risk-based duty to use appropriate technical and organisational measures. Its guidance states: “Although compliance with the PCI-DSS is not necessarily equivalent to compliance with the UK GDPR’s security principle, if you process card data and suffer a personal data breach, the ICO will consider the extent to which you have put in place measures that PCI-DSS requires particularly if the breach related to a lack of a particular control or process mandated by the standard.”
Apply that principle by documenting who is controller and processor, using written processor terms, limiting data to what the payment purpose requires, controlling access, testing security, and defining breach escalation. Address international transfers and subprocessor locations in the arrangement. The ICO notes that some guidance is under review following the Data (Use and Access) Act 2025, so check the current official wording and any transition material when implementing or updating controls.
India: storage, operator resilience, and authentication
Payment-system data storage
The Reserve Bank of India’s 6 April 2018 notification, “Storage of Payment System Data,” says: “All system providers shall ensure that the entire data relating to payment systems operated by them are stored in a system only in India.” The notification describes the data broadly as full end-to-end transaction details or information collected, carried, or processed as part of a message or payment instruction.
For the foreign leg of a transaction, the same data may also be stored in the foreign country if required. The notification gave six months for implementation, 15 October 2018 for reporting, and a subsequent audit-report timetable; those are historical dates, not new deadlines. Determine whether your entity is a covered system provider rather than assuming the direction applies identically to every merchant, software vendor, or overseas processor. Check current RBI updates, amendments, and your contractual role before selecting storage regions.
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Cyber resilience for authorised non-bank payment-system operators
The RBI Master Directions on Cyber Resilience and Digital Payment Security Controls for non-bank Payment System Operators, published on 30 July 2024, apply to authorised non-bank PSOs. Implementation is phased by operator size: large operators from 1 April 2025, medium operators from 1 April 2026, and small operators from 1 April 2028.
The directions call for a Board-approved organisational policy and controls addressing cyber and technology risks, including risks created through links to unregulated gateways, third-party service providers, and vendors. The directions state that adherence by those linked entities is subject to mutual agreement. A gateway or technology supplier is therefore not automatically regulated in the same way as the authorised PSO, but the PSO must establish contractual and operational oversight appropriate to the relationship. Confirm the official RBI text, definitions, size classification, and any amendments before creating a control-by-control implementation plan.
Authentication for domestic digital payments
The RBI Authentication Mechanisms for Digital Payment Transactions Directions, dated 25 September 2025, apply to payment-system providers and participants, including banks and non-banks, for domestic digital payment transactions unless a stated exemption applies. They require at least two distinct authentication factors unless an exception covers the transaction. The compliance date is 1 April 2026.
The directions also contain instructions for certain cross-border card-not-present transactions using India-issued cards. Their annexures and transaction-specific provisions define exemptions, so “two-factor authentication for every payment” is too broad. Map each payment journey to the applicable exemption or requirement, document the factor types and independence, protect authentication data, and test failure and recovery paths. Issuers have responsibilities for the robustness and integrity of authentication and for data-protection adherence under the Digital Personal Data Protection Act, 2023. Recheck the RBI-hosted instrument and later amendments before implementation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Compare payment architectures and providers by evidence, not slogans
When selecting or redesigning a payment arrangement, compare the following dimensions. The sources do not establish a universally best processor or architecture; the right choice depends on your roles, countries, channels, and contracts.
| Comparison axis | Questions to ask | Evidence to request |
|---|---|---|
| Card-data exposure and PCI scope | Does your environment receive, transmit, store, or influence CHD or SAD? Which scripts, integrations, administrators, and support tools remain in scope? | Current PCI validation, scope statement, responsibility matrix, and relevant scan or assessment evidence. |
| Collection, processing, and storage locations | Where are payment and personal data collected, processed, backed up, and accessed? Does India’s storage direction apply? | Data-flow diagram, cloud-region list, subprocessor list, and transfer terms. |
| Payment role and authorization | Is the provider a merchant, processor, gateway, acquirer, bank, UK payment-service provider, or Indian authorised PSO? | Regulatory status, contractual role descriptions, and applicable program requirements. |
| Authentication | Which factors are used, for which transaction types, and which RBI exemptions or cross-border provisions apply? | Authentication design, factor-independence analysis, exception register, and test results. |
| Third-party access and contracts | Can suppliers or subprocessors access payment or personal data? Are incident, audit, continuity, and deletion duties enforceable? | Signed agreements, subprocessor notices, access reviews, and flow-down clauses. |
| Incident response and continuity | How are major incidents detected, escalated, reported, and recovered across time zones? | Playbooks, exercise records, recovery objectives, contact lists, and regulator or acquirer notification procedures. |
| Validation evidence | Can the provider supply current attestations, reports, scans, and remediation status relevant to your scope? | Dated AOC or ROC where applicable, ASV results, exception documentation, and remediation commitments. |
Evidence and governance that survive an audit or incident
Assign an owner and review date to every control. Your evidence set should let an assessor, acquirer, regulator, or incident team reconstruct what data moved, who could access it, which safeguard applied, and whether the safeguard was operating at the relevant time.
Quick Recap
- Maintain a system and asset inventory linked to each payment flow.
- Keep a data dictionary distinguishing CHD, SAD, authentication data, and other personal data.
- Record risk assessments, management or Board approvals, and exceptions with expiry dates.
- Retain access approvals, privileged-access reviews, logging and monitoring records, vulnerability scans, and security-test results.
- Store processor contracts, subprocessor lists, PCI attestations, assessor reports, and acquirer correspondence together with their effective dates.
- Exercise incident and continuity plans, including supplier escalation and the FCA, ICO, RBI, or other notification path that may apply.
- Reconcile actual architecture with diagrams after releases, migrations, acquisitions, and provider changes.
Common mistakes and how to correct them
| Mistake | Why it fails | Correction |
|---|---|---|
| Calling PCI DSS a universal US, UK, or Indian law | PCI validation is generally imposed through payment-brand or acquirer programs, while national duties differ by role and jurisdiction. | Obtain the program’s written validation requirements and perform a separate legal and regulatory assessment. |
| Assuming a processor removes all PCI responsibility | Your systems, integrations, staff, and supplier oversight may still affect the CDE. | Document the shared-responsibility boundary, confirm it with the acquirer, and monitor your remaining controls. |
| Using PCI DSS as proof of UK GDPR compliance | The ICO expressly says PCI DSS is not necessarily equivalent to the UK GDPR security principle. | Complete a risk-based UK GDPR assessment covering roles, contracts, minimisation, access, transfers, and breach response. |
| Applying India’s 2018 dates as current deadlines | The six-month and 15 October 2018 dates have passed. | Check present RBI applicability, amendments, and your status as a covered system provider. |
| Treating every Indian vendor as an authorised PSO | The 2024 cyber-resilience directions apply to authorised non-bank PSOs, while linked vendors are addressed through oversight and agreement. | Confirm the regulated entity, size category, contractual obligations, and control flow-down. |
| Describing RBI authentication as exceptionless | The 2025 directions include specified exemptions and transaction-specific provisions. | Map each domestic and relevant cross-border journey to the applicable factor and documented exception. |
| Keeping one static compliance file | New channels, locations, providers, data types, and amendments can change scope. | Use change-triggered reviews and date every standard, direction, contract, and test result. |
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