KYC vs KYB: Key Differences and When You Need Each

A fintech onboarding a corporate client does not run one compliance check. It runs two at the same time: one on the business entity, and one on every individual owner who controls it. That dual requirement is where KYC and KYB meet, and where most compliance gaps begin.

KYC (Know Your Customer) and KYB (Know Your Business) are distinct processes within the same compliance framework. Both reduce financial crime risk by confirming who is on each side of a transaction. But they operate on different subjects, draw on different data sources, and trigger different regulatory obligations. This article explains how they differ, how they interconnect, and when each one applies.

What is KYC (Know Your Customer)?

KYC stands for Know Your Customer. It is the identity verification process applied to natural persons. It requires regulated entities to collect identifying information from customers, verify that information against reliable sources, and screen individuals against sanctions lists and politically exposed person (PEP) registries.

KYC is mandatory for banks, payment institutions, crypto-asset service providers, and any entity classified as obliged under national AML legislation.

A standard KYC check covers identity document collection, liveness or biometric verification, sanctions screening, and PEP status review. KYC workflows trigger at onboarding and recur at intervals determined by the customer risk profile. Low-risk individuals may pass through simplified due diligence. High-risk customers such as PEPs require enhanced due diligence with deeper source of funds verification.

For platforms processing individual consumers, KYC software automates document verification, liveness checks, and sanctions list screening at scale.

What is KYB (Know Your Business)?

KYB stands for Know Your Business. It applies when the customer is a legal entity rather than a natural person. It requires verifying the business itself, mapping its ownership structure, identifying every ultimate beneficial owner (UBO), and screening both the entity and its controlling persons.

KYB is part of the customer due diligence (CDD) framework, extended specifically to corporate structures.

KYB is required whenever a regulated entity onboards a corporate customer, processes payments on behalf of a business, or enters a relationship where the client is a legal entity rather than an individual. Typical KYB checks include company registry verification, incorporation document review, beneficial ownership mapping, and sanctions and adverse media screening of both the entity and its UBOs.

KYB verification software handles the most operationally demanding part of this process: automated UBO resolution and corporate registry integration across jurisdictions.

KYC vs KYB: Side-by-Side Comparison

The table below compares the two processes across five key dimensions.

Aspect	KYC (Know Your Customer)	KYB (Know Your Business)
Primary subject	Natural persons and individual identity	Legal entities and their ultimate beneficial owners
Typical checks	ID documents, liveness check, sanctions screening, PEP review	Company registry, incorporation docs, UBO mapping, adverse media
Data sources	Government IDs, biometric providers, UN and Interpol sanctions lists	Corporate registries, shareholder filings, commercial data providers
When applied	Individual onboarding and risk-triggered ongoing monitoring	Corporate onboarding, UBO verification, and periodic entity re-check
Regulatory basis	FATF Recommendation 10; FinCEN CDD Rule 31 CFR Part 1010; EU AMLD	FATF Recommendation 24; EU 6AMLD Article 3; FinCEN CDD Rule

How KYC and KYB Work Together

KYC attaches to persons. KYB attaches to entities. But both feed the same risk assessment framework used by compliance teams. The critical connection is beneficial ownership: every UBO identified during the KYB process must be individually verified using KYC procedures.

A company with three equal shareholders above the 25% ownership threshold requires three individual KYC checks embedded within the KYB workflow.

Compliance teams that run KYC and KYB as separate, siloed programs frequently miss this intersection. A PEP hiding within a corporate ownership structure surfaces only if KYC screening is applied to the UBOs named through KYB. Regulators cite the broken linkage between individual and entity records as one of the most common control failures found in AML program audits.

Integrated KYC-KYB pipelines also strengthen transaction monitoring. They give compliance systems a complete picture of who sits behind each entity in a transaction. For privacy-preserving approaches to individual identity checks, see the guide on zero-knowledge proof in KYC verification.

KYB Verification Process: Step by Step

Seven sequential steps make up a standard KYB verification workflow, aligned with current FATF and EU AML expectations. These steps apply to banks, payment institutions, VASPs, and any regulated entity that onboards corporate customers.

Step 1: Data intake and entity identification

Collect the core corporate identifiers: legal name, registration number, country of incorporation, and tax identification number. Gather customer-provided documents such as the certificate of incorporation and articles of association. Record all data that will be used to link the legal entity to the natural persons who control it.

Step 2: Entity existence and status verification

Confirm entity existence and current registration status using official company registries and validated third-party commercial providers. Verify the registration number, registered address, and filing history where the registry makes it available. Flag discrepancies between customer-provided data and official registry records for manual review before proceeding.

Step 3: Ownership chain mapping to identify UBOs

Map the full ownership structure to identify ultimate beneficial owners. These are natural persons with direct or indirect ownership or control above the applicable threshold. In the EU, the standard threshold is 25% ownership or control under the 6AMLD framework. Other jurisdictions may apply different thresholds. Where direct ownership records do not identify a natural person as controller, investigate further for nominee director or trust structures.

Step 4: KYC on each identified UBO

Each identified UBO must pass an individual identity verification check: ID document collection, liveness check where required, and sanctions plus PEP screening. This is the step where the KYB process formally incorporates the KYC process. Any UBO who returns a confirmed sanctions or PEP match triggers escalation to enhanced due diligence before the business relationship proceeds.

Step 5: Entity-level sanctions and adverse media screening

Screen the entity name and all registered trading names against consolidated sanctions lists, including UN Security Council and OFAC lists. Run adverse media checks on entity names and connected persons using commercial media databases. Escalate confirmed hits to a dedicated sanctions or financial crime specialist team for case handling and documented decision rationale.

Step 6: Source of funds and business purpose verification

Collect documentary evidence of the business activity, the expected transaction profile, and the origin of funds where risk classification requires it. Obtain bank statements, invoices, or audited accounts as corroborating evidence where beneficial ownership risk is elevated. Record any red flags and the residual risk decision, with sign-off by an authorized compliance officer as required by internal controls frameworks.

Step 7: Ongoing monitoring and periodic review

Apply risk-based periodic rechecks for both entity registration status and UBO sanctions exposure. Set automated triggers for ownership filing changes, high-value transaction patterns, or adverse media alerts to initiate off-cycle reviews. Maintain auditable records documenting the data sources used, the decision rationale, and the review date for each corporate customer for regulatory examination.

When Do You Need KYC vs KYB?

The matrix below maps compliance requirements to customer type, based on FATF guidance and EU AML frameworks.

B2C platforms onboarding individual consumers

KYC applies. Verify individual identity, screen against sanctions and PEP lists, and apply risk-based ongoing monitoring. KYC software automates this workflow for high-volume consumer onboarding.

B2B platforms onboarding corporate clients

KYB applies, with embedded KYC for each identified UBO. Entity verification covers the company. Individual KYC covers the persons who control it. KYB verification software handles both layers within a single automated workflow.

Mixed marketplaces and multi-sided platforms

Both KYC and KYB run in parallel, segmented by customer type. A marketplace with consumer sellers and corporate buyers must apply the correct verification process to each account type. Compliance teams without proper customer segmentation routinely underscreen corporate accounts.

Crypto exchanges and VASPs

FATF Recommendation 15 requires crypto-asset service providers to apply CDD to both individuals and corporate clients. Corporate accounts at a VASP trigger a KYB process that includes UBO identification and individual KYC on each person holding control. Gaps between individual and entity screening at VASPs have been flagged in multiple FATF mutual evaluation reports as a systemic risk.

Common Challenges in KYB Implementation

Data quality and registry coverage gaps

Corporate registry coverage is uneven across jurisdictions. Some markets provide limited or delayed public access to ownership records. In those markets, KYB programs depend on customer-provided documents that need independent corroboration. Commercial data providers help, but they have their own coverage gaps and update delays. Your risk policy needs to factor this in.

Complex ownership structures and nominee arrangements

Nominee directors and multi-layer holding structures frequently obscure the natural persons who actually control an entity. Automated registry lookup tools handle straightforward ownership chains reliably. But structures involving trust intermediaries or cross-border holding companies require human-in-the-loop controls. Compliance teams report that 30% to 40% of complex corporate customers require manual investigation beyond what automated registry lookups resolve, according to internal benchmarking data cited in Deloitte’s 2023 AML survey.

Keeping beneficial ownership data current

UBO data changes when shareholders transfer stakes, directors rotate, or corporate restructuring occurs between review cycles. A KYB program without automated change-event triggers accumulates stale ownership records that no longer reflect the actual risk profile of the entity. Risk-triggered review cycles combined with third-party ownership change feeds reduce stale data exposure without requiring continuous manual monitoring.

How Zyphe Supports KYC and KYB

Most KYC and KYB platforms use a centralised architecture. They collect, process, and store customer PII in their own databases. Every operator using them inherits the data liability that comes with that centralised store.

Zyphe is built differently. Identity is verified and then customer data is deleted, not held in a central repository. Customers own and control their own verified credentials. They can reuse them across platforms without re-submitting documents each time.

For operators, this means meeting your KYC and KYB verification obligations without the breach risk that comes with storing PII centrally. Less data liability, faster repeat onboarding through credential reuse, and clean audit trails for regulators.

Book a call with Zyphe to see how decentralised verification fits your compliance program.

FAQ: KYC vs KYB

What is the main difference between KYC and KYB?

KYC (Know Your Customer) verifies the identity of individual natural persons, covering identity documents, biometrics, and sanctions screening. KYB (Know Your Business) verifies legal entities and their ultimate beneficial owners, covering company registration, ownership structure, and corporate-level adverse media. KYC applies to consumer onboarding. KYB applies when your customer is a company.

Does KYB include KYC?

Yes. A complete KYB process requires running individual KYC verification on every UBO identified through the ownership mapping step. The KYB workflow verifies the entity. Embedded KYC verifies the natural persons who control it. Skipping individual verification of UBOs leaves a compliance gap that regulators specifically look for during AML program examinations.

Is KYB required for all businesses?

KYB is required whenever a regulated entity onboards a corporate customer into a business relationship. This applies to banks, payment institutions, crypto-asset service providers, investment firms, and any entity classified as obliged under the AML legislation of their operating jurisdiction. The specific UBO identification threshold and depth of verification required vary by jurisdiction and the assigned risk level of the customer.

What is the KYB verification process?

The KYB verification process covers seven sequential steps: entity data intake and identification, registry-based entity existence verification, ownership chain mapping to identify UBOs, individual KYC checks on each UBO, entity-level sanctions and adverse media screening, source of funds verification where risk warrants, and ongoing monitoring with risk-triggered periodic reviews. The most operationally demanding step in practice is UBO identification for multi-layer and cross-border corporate structures. This answer is informational and is not a compliance guarantee.

The Bottom Line

KYC and KYB are two sides of the same compliance framework. Running them as separate programs creates the exact gaps regulators flag in enforcement reviews. A program that links entity verification to individual UBO screening, runs automated monitoring triggers for both, and maintains auditable evidence of each decision addresses the weaknesses that manual, siloed approaches consistently miss.

For individual consumer onboarding, KYC software automates identity verification at scale with biometric and sanctions check integration. For corporate customer onboarding, KYB verification software handles entity verification, UBO resolution, and embedded KYC in a single workflow. For privacy-preserving verification techniques that reduce data liability, see the guide on zero-knowledge proof in KYC verification.