What Is KYB (Know Your Business)? KYB vs KYC Explained

Search "what is KYB" and most results either assume you already work in compliance or bury the definition under a product pitch. KYB, Know Your Business, is the process of verifying that a company is a real, legally registered entity and identifying the natural persons who own or control it, before that company is allowed to open an account, move money, or transact on a regulated platform. It exists because a bank, exchange, or marketplace can run flawless KYC on every individual it onboards and still have no idea who actually stands behind the corporate customer signing the contract.

The confusion between KYB and KYC is not accidental. Both sit inside the same anti-money-laundering framework, both produce a pass/fail compliance decision, and vendors routinely bundle them into one dashboard. But they verify different things, are triggered by different customer types, and satisfy different regulatory obligations. This post lays out what KYB actually is, how it differs from KYC, what a KYB check has to include to satisfy a regulator, and why the requirement exists in the first place.

What Is KYB (Know Your Business)?

Know Your Business is the corporate-entity counterpart to Know Your Customer. Where KYC confirms that an individual is who they claim to be, KYB confirms three separate things about a business customer: that the company is legally registered and in good standing, that its ownership and control structure is known down to the natural persons at the top of it, and that neither the company nor those individuals appear on a sanctions, watchlist, or adverse-media screen. A business cannot itself be fingerprinted or asked for a selfie, so KYB works by pulling the company's official registry record and then tracing ownership through however many holding companies, trusts, or nominee structures sit between the registered entity and the real people who control it.

This matters because a shell company is, by design, a legitimate-looking legal entity with no obvious individual attached to it. KYB is the specific control that closes that gap: it does not stop at confirming the company exists, it requires tracing ownership until an actual person is identified, then running that person through the same identity and screening checks an individual customer would face.

KYB vs KYC: Two Different Compliance Checks

KYC and KYB answer different questions for different customer types, and a regulated business usually needs both running side by side rather than choosing one.

In practice, KYB is not a replacement for KYC, it triggers more of it. Every UBO and officer a KYB check identifies still needs to pass individual KYC in their own right. A business with three beneficial owners means one entity-level check plus three person-level checks, all linked to the same case file.

What a KYB Check Actually Includes

A KYB check that would satisfy a regulator covers five distinct pieces, not just a company-name lookup.

The 25% figure is not an arbitrary industry convention, it is the specific threshold two of the major regulatory frameworks use to define a beneficial owner. In the United States, FinCEN's Customer Due Diligence Rule requires covered financial institutions to identify any individual who owns 25% or more of a legal entity customer, plus one individual who exercises significant managerial control, regardless of ownership percentage.

FinCEN, Customer Due Diligence Requirements for Financial Institutions →

The European Union's Fifth Anti-Money Laundering Directive sets a parallel standard, defining a beneficial owner as a natural person holding, directly or indirectly, more than 25% of shares or voting rights, with individual member states permitted to set a lower threshold.

Directive (EU) 2018/843, Article 3(6) →

Why Regulators Require KYB

The Financial Action Task Force, the intergovernmental body that sets the global standard other AML regimes build on, requires countries to ensure that competent authorities have access to adequate, accurate, and up-to-date information on who actually owns and controls a legal entity, specifically because layered corporate structures, shell companies, nominee shareholders, and trusts are a documented method for disguising the origin of illicit funds.

FATF, Recommendation 24, Transparency and Beneficial Ownership of Legal Persons →

Without a KYB requirement, an individual barred from opening an account under sanctions or fraud history could simply route the same activity through a company they quietly control. KYB due diligence closes that route by requiring the check to follow ownership all the way to a real person, not stop at the name on the incorporation certificate.

KYB Requirements and Process at a Glance

Stripped of vendor-specific tooling, the KYB process runs through the same sequence regardless of who operationalizes it: pull the official registry record for the business, identify every UBO and officer from that record and any supporting documents, run individual KYC and AML screening on each identified person in parallel with entity-level screening on the company itself, collect and cross-check supporting corporate documents, and produce one compliance decision that aggregates every linked result. A holding company sitting in the ownership chain does not exit the process, it triggers the same sequence again one layer up, until the check reaches a natural person at every branch.

For the operational detail on automating that pipeline, including how nested ownership structures and reusable verification fit into a working flow, see our complete guide to KYB onboarding.

Do You Need KYB, KYC, or Both?

If every customer your business onboards is an individual, consumer lending, retail brokerage, a subscription product, KYC alone covers the obligation. If any customer is a registered business, a corporate account, a B2B marketplace seller, a fintech partner, KYB is the required layer for that relationship, and it does not replace the KYC each identified UBO and officer still has to pass individually. Most regulated platforms that serve both consumers and businesses end up running both checks permanently, routed by customer type rather than chosen once and applied everywhere.

FAQ

What is the difference between KYC and KYB?

KYC verifies an individual's identity through document capture and biometrics. KYB verifies a legal entity by confirming its registration status and mapping its beneficial ownership structure down to the natural persons who control it, each of whom then goes through KYC in their own right. KYC checks one person; KYB checks a company plus everyone who owns or controls it.

What is the 25% ownership threshold in KYB?

It is the ownership percentage that regulators, including FinCEN in the US and the EU's Fifth AML Directive, use to define a beneficial owner requiring identification. Any natural person owning 25% or more of a company's shares or voting rights must be identified and verified, alongside anyone who exercises control regardless of their exact ownership percentage.

Is KYB legally required, or optional best practice?

It is a legal requirement for regulated financial institutions and many other regulated businesses onboarding corporate customers, not a discretionary best practice. FATF Recommendation 24 sets the international standard, and jurisdictions including the US and EU have codified it into binding rules such as FinCEN's CDD Rule and the EU's AML Directives.

What happens if a beneficial owner is another company, not a person?

The KYB check applies recursively to that corporate owner: pulling its registry record and identifying its own UBOs, one layer up the ownership chain. This continues until every branch of the ownership structure resolves to a natural person, which is why KYB on a company with layered holding structures can trigger several linked entity checks, not just one.

References

Primary sources for every regulatory claim above:

• FATF, Beneficial Ownership of Legal Persons (Recommendation 24, official FATF guidance)
  Supports the global requirement for accurate, up-to-date beneficial ownership information and the rationale for KYB.
• FinCEN, Customer Due Diligence Requirements for Financial Institutions (CDD Final Rule)
  Source for the US 25% beneficial ownership threshold and the separate control-prong requirement.
• Directive (EU) 2018/843 (Fifth Anti-Money Laundering Directive), Article 3(6)
  Source for the EU 25% beneficial ownership definition and member-state discretion to set a lower threshold.

About Hypersign

Hypersign runs KYB as one orchestrated workflow: registry verification, UBO and beneficial ownership mapping, officer checks, document collection, and AML screening, with every identified UBO automatically routed into linked KYC rather than handled as a separate integration. See the full KYB platform, or read the operational walkthrough in our KYB onboarding guide.