KYB Compliance: A Complete Guide to Know Your Business Checks (2026): What KYB (Know Your Business) is, how it differs from KYC, what due diligence is required for corporate clients, and how to build a scalable KYB…
HubSecure is relevant when teams need secure client records, document collection, workflow ownership, role-based access and audit-ready evidence in one governed workspace.
Most regulated businesses have heard of KYC (Know Your Customer). Fewer have a clear programme for KYB — Know Your Business — the equivalent process for corporate clients. Yet corporate structures are the dominant vehicle for financial crime. Shell companies, nominee directors, multi-layered ownership structures and offshore entities all create risk that standard individual KYC processes cannot adequately address.
This guide explains KYB in full: what it requires, how it differs from KYC, what due diligence steps are needed for corporate clients, and how to build a process that scales.
Related HubSecure buying path
AML/KYC & Onboarding guideclient onboarding softwareAML/KYC moduleSumsub comparisonAML/KYC compliance software guideGuide Librarybook a workflow demo
Related AML/KYC and compliance monitoring resources
Continue with AML/KYC monitoring module, compliance workflows, HubSecure for legal teams, HubSecure for finance teams, security and trust center.
Related use case
This guide belongs to the AML and KYC Guides cluster. Continue with the product hub for aml and kyc.
What is KYB?
KYB — Know Your Business — is the process of verifying the identity, ownership structure, legal status and risk profile of a corporate entity before (and during) a business relationship. It is required by AML regulations for any obliged entity that onboards companies, partnerships, trusts or other legal arrangements as clients.
The core objectives of KYB are:
- Confirm the entity is legally registered and operating
- Identify the Ultimate Beneficial Owners (UBOs) — the real people who own or control the entity
- Verify the identity of those UBOs
- Screen UBOs, directors and controllers against sanctions lists and PEP databases
- Assess the risk profile of the entity and apply appropriate due diligence
- Document all of the above in a defensible audit trail
KYB vs KYC: what is the difference?
| Dimension | KYC | KYB |
|---|---|---|
| Subject | Natural persons (individuals) | Legal entities (companies, trusts, partnerships) |
| Core requirement | Identity verification of the individual | Entity verification + UBO identification + individual KYC on UBOs |
| Complexity | Relatively straightforward | Significantly higher — ownership chains can be multi-layered |
| Data sources | Government ID, biometric verification | Company registries, beneficial ownership registers, articles of incorporation, shareholder registers |
| Ongoing monitoring | Monitor individual PEP status, sanctions | Monitor entity + directors + UBOs + ownership changes |
Importantly, KYB always includes KYC — you must verify the identity of the individuals who ultimately own or control the entity. KYB is therefore a superset of KYC for corporate clients.
Who counts as a UBO?
A UBO (Ultimate Beneficial Owner) is defined under EU law as any natural person who:
- Holds more than 25% of the shares or voting rights in the entity (directly or indirectly), or
- Otherwise exercises control over the management of the entity
The 25% threshold is a floor, not a ceiling. Where the ownership structure is complex or opaque, you should look through to the individuals who exercise effective control, even if no single person formally meets the 25% threshold. A nominee director structure or a holding company chain should prompt enhanced scrutiny, not acceptance of the stated ownership at face value.
Watch out for layered structures: Company A is owned by Company B, which is owned by a trust in a low-transparency jurisdiction, which names a law firm as trustee. The real beneficial owner may be several layers removed from what appears on the surface. Adequate KYB means tracing through these structures to identify the actual natural persons in control.
What documents are typically required for KYB?
Standard corporate KYB documentation includes:
- Certificate of incorporation (or equivalent) from the registering authority
- Articles of association / memorandum of association
- Register of directors (current and recent)
- Register of shareholders / beneficial owners
- Proof of registered address
- Identity documents for each UBO (as for individual KYC)
- Source of funds documentation (for higher-risk relationships)
For higher-risk entities — those in high-risk jurisdictions, with complex ownership structures, or with PEP-connected UBOs — Enhanced Due Diligence applies, adding requirements for source of wealth verification, senior management approval and enhanced ongoing monitoring.
Common KYB failures that regulators find
- Accepting registry data without verification: Company registries in some jurisdictions allow self-reported UBO data that may be inaccurate. Taking registry data at face value without independent corroboration is not sufficient.
- Not identifying UBOs for complex structures: When ownership is layered through multiple holding companies, firms sometimes stop at the first company rather than tracing through to the natural person in control.
- Failing to update KYB on ownership changes: Companies change ownership. Ongoing monitoring must include watching for changes in director, UBO and ownership structure — not just sanctions and PEP status.
- Incomplete identity verification on UBOs: Identifying who the UBOs are is not the same as verifying their identity. Both steps are required.
How to build a scalable KYB programme
Manual KYB processes — document collection by email, manual registry lookups, spreadsheet-based tracking — fail at scale. As client volume grows, the rate of errors and gaps increases, audit trail quality degrades and ongoing monitoring becomes operationally impossible to maintain.
A scalable KYB programme combines:
- Structured data collection: Digital onboarding flows that collect entity and UBO information systematically
- Automated registry checks: Direct integration with company registries to verify entity status, directors and shareholders
- UBO screening: Automated sanctions and PEP screening on all identified beneficial owners
- Risk-based workflows: Different due diligence requirements triggered automatically based on entity type, jurisdiction and risk score
- Centralised client record: All KYB data, documents and decisions stored in one place linked to the client's CRM record
- Ongoing monitoring: Automatic re-screening and alerts when directors, UBOs or ownership structure changes
Frequently asked questions
Does KYB apply to my business if I mainly serve other businesses?
Yes — if you are an obliged entity under AML regulations, KYB requirements apply to all corporate clients regardless of the nature of your service.
What is the beneficial ownership register?
Many EU member states maintain public or semi-public registers of beneficial ownership, as required by the Fourth and Fifth AML Directives. These can be a useful starting point but are not sufficient on their own — they rely on self-reported data and may be incomplete or out of date.
What if a UBO refuses to provide identity documents?
A refusal to provide information required for KYB is itself a red flag. Obliged entities are generally required to decline or exit the relationship if they cannot complete satisfactory due diligence.
How often should we re-screen corporate clients?
Ongoing monitoring should be risk-based — higher-risk corporate clients should be reviewed more frequently. At minimum, most regulators expect annual reviews for standard relationships and continuous automated re-screening for sanctions and PEP changes.
Get compliance insights in your inbox
Join 300+ compliance officers and legal teams getting weekly updates on AML, GDPR, and security regulation — no noise, unsubscribe anytime.
See HubSecure in action
AML/KYC screening, GDPR-compliant CRM, encrypted mail and AI automation — all in one platform built for regulated businesses.
Book a 20-minute demo →