Table of contents
- KYB, short for Know Your Business, is the process of verifying that a company you deal with is legally registered, genuinely operating, and free of hidden financial-crime risk.
- Where KYC verifies a person, KYB verifies an organisation, and because companies can hide behind layers of ownership, it is often the harder problem.
- A KYB check confirms the entity's registration and status, maps its ownership down to the ultimate beneficial owners, and screens the business and those owners against sanctions, PEP and adverse-media data.
For a plain-language walkthrough aimed at checking one company rather than running KYB at scale, see how to verify if a company is legitimate.
- Regulators require it: anti-money-laundering rules oblige regulated firms to identify and verify the beneficial owners behind their business customers, generally at a 25 percent ownership threshold.
- It is not a one-time check; ownership and control change, so Know Your Business works best as ongoing monitoring rather than a single onboarding gate.
- The hard part is resolving true ownership across registries and jurisdictions, which is where automation and broad registry coverage make the difference.
Know Your Business, or KYB, is the process by which a regulated firm verifies that a business customer is legally registered and operating, identifies the people who ultimately own or control it, and screens the company and those owners for financial-crime risk. It is the business equivalent of KYC, which verifies an individual.
TL;DR
KYB is the verification of a company rather than a person: confirming it is legally registered and operating, identifying the ultimate beneficial owners behind it, and screening the business and its owners against sanctions, PEP and adverse-media data. Regulators require it, generally obliging firms to identify beneficial owners at a 25 percent threshold. It is harder than KYC because companies can hide behind layers of ownership across jurisdictions, and because ownership changes, so it works best as ongoing monitoring. The practical challenge is resolving true ownership across many registries, which is where automation and broad coverage matter most.
What is KYB (Know Your Business)?
Know Your Business, usually shortened to KYB, is the set of checks a regulated firm runs to confirm that a company it is about to deal with is real, legally constituted, and not a front for financial crime. Just as Know Your Customer, or KYC, establishes that a person is who they claim to be, KYB establishes that a business is what it claims to be, and reveals the people standing behind it.
The reason KYB exists as a distinct discipline is that businesses are not people. A company is a legal construct that can own other companies, be owned by others, operate across borders, and change hands without anyone obvious being named. Criminals exploit exactly this, using shell and layered structures to move and hide illicit funds. KYB is the process designed to see through that: to verify the entity, understand who ultimately controls it, and decide whether it is safe to onboard. It sits alongside KYC software in any complete compliance stack, but it answers a different and often harder question.
Why does Know Your Business matter?
KYB matters for two reasons: it is legally required, and it is a genuine defence against fraud and money laundering. On the legal side, anti-money-laundering regimes worldwide oblige regulated firms to identify and verify the beneficial owners of their business customers before onboarding them, and to keep that information current. Failing to do so is a compliance breach that supervisors penalise heavily.
On the risk side, business relationships are where a great deal of financial crime hides. A company that looks ordinary on the surface may be majority-owned by a sanctioned individual, controlled by a politically exposed person, or structured specifically to obscure the flow of illicit money. Without KYB, a firm can unknowingly onboard, and process payments for, exactly the entities the rules are meant to keep out. Done well, Know Your Business protects the firm from regulatory penalties, from becoming a conduit for laundering, and from the reputational damage that follows either. It is the foundation of any AML compliance programme that serves business customers.
What does a KYB check verify?
A thorough KYB check covers four things. First, the entity itself: its legal name, registration or company number, registered address, jurisdiction of incorporation, and current status, cross-referenced against official corporate registries to confirm the business is genuinely registered and active. Where the company operates in a licensed sector, the check also confirms it holds the necessary licences or permits.
Second, ownership. The check maps the ownership structure to identify the ultimate beneficial owners, the natural people who ultimately own or control the company, typically defined as those holding 25 percent or more of the shares or voting rights, or exercising control by other means. Third, the people in charge: directors, officers and significant shareholders. Fourth, risk screening: the business, its directors and its beneficial owners are all screened against sanctions lists, politically exposed person data and adverse media. The evidence for all of this comes from corporate and beneficial-ownership registries, filings, shareholder and trust records, and identity verification of the natural persons involved, the same enhanced due diligence logic applied to entities.
What is the difference between KYC and KYB?
The simplest way to put it: KYC verifies a person, KYB verifies a company, and KYB then loops back to KYC for the people it uncovers. KYC confirms an individual's identity using documents, chip reads and liveness. KYB confirms a business is legitimate and, crucially, identifies the individuals who ultimately own or control it, at which point each of those beneficial owners typically has to be verified as a person in their own right.
So KYB is broader and usually more complex. A KYC check has one subject; a KYB check may have many, because resolving ownership can surface a chain of holding companies and several ultimate beneficial owners, each needing verification and screening. The two are complementary halves of onboarding: a firm serving businesses needs both, and the strongest programmes run them together so that verifying a company automatically triggers verification of the people behind it. We cover the distinction in depth in our guide to KYC vs KYB.
Who needs to perform Know Your Business checks?
Any regulated firm that onboards businesses as customers, partners or counterparties needs to perform KYB. That includes banks and payment providers opening accounts for companies, fintechs and marketplaces onboarding business sellers or merchants, crypto platforms serving corporate clients, lenders extending business credit, and insurers and professional-services firms with corporate clients. In short, if your customer is a company and you are regulated, KYB is not optional.
Beyond the strictly regulated, many firms adopt KYB voluntarily as a fraud and risk control, because onboarding a fraudulent or misrepresented business can cause direct financial loss even where no AML rule applies. Marketplaces and platforms, in particular, increasingly verify business users to protect their ecosystems. The common thread is that wherever money or trust flows to a company, knowing who really stands behind that company is a basic protection, which is why KYB has moved from a banking-only requirement to a broad business verification need.
How does KYB verification work?
A modern KYB verification runs as a sequence. It begins by collecting the company's core details and confirming them against official registries: is the entity registered, active, and as described. It then resolves the ownership structure, working through holding companies and shareholdings to identify the ultimate beneficial owners, and verifies the identity of those people using the same document, chip and liveness checks as individual KYC.
Next, it screens the business and every uncovered owner and director against sanctions, PEP and adverse-media data, and assesses the overall risk of the relationship. Finally, because none of this stays static, it establishes ongoing monitoring so that changes, a new owner, a director becoming a PEP, a fresh sanction, or emerging adverse media, are caught after onboarding rather than missed. Automating this end to end is what turns KYB from a slow, manual investigation into a fast, repeatable check, and it depends on broad registry coverage and reliable ownership resolution, the foundation of decentralised KYC and KYB infrastructure alike.
What are the challenges of KYB?
The central challenge of KYB is ownership opacity. Real ownership is often buried under layers of holding companies, spread across jurisdictions with different disclosure rules, and sometimes deliberately obscured. Resolving the true ultimate beneficial owners can mean traversing several registries in several countries, each with its own format, language and reliability, and some beneficial owners sit below the reporting threshold specifically to stay hidden.
The second challenge is data: corporate registries vary enormously in coverage and quality, and beneficial-ownership registers are still uneven across the world, so no single source is complete. The third is keeping current, since ownership and control change constantly and a KYB check that was accurate at onboarding can be stale within months, which is why perpetual, ongoing monitoring matters. The fourth is friction: business onboarding that demands endless documents loses customers, so the goal is thorough verification that is still fast. Meeting all four at once is what separates a capable KYB solution from a box-ticking one.
What happens when no natural person owns 25 percent?
One of the most common and misunderstood outcomes in Know Your Business is that no individual reaches the 25 percent threshold at all. Take an anonymised example, based on a real structure with names and figures changed: an Italian software company owned 87 percent by a Belgian holding company, which sits under a chain of Luxembourg vehicles and a private-equity fund, ending at a general partner in Guernsey where registry coverage is unavailable. Traced through, the highest any natural person reaches is about 23 percent, the group's chief executive. A mechanical hunt for the 25 percent owner returns nobody.
That is not the same as there being no owner to record. When no natural person meets the threshold, the law prescribes a fallback: test for control by other means, look through the ownership chain as far as coverage allows, and, failing that, record the senior managing officials, usually the board, as the beneficial owners. Italy codifies this in Article 20 of Legislative Decree 231/2007, and equivalent senior-managing-official fallbacks exist across the EU. The correct output is therefore never a blank no UBO found; it is a defensible record of the highest effective owners, the point where coverage ran out, and the officials recorded in place of a 25 percent owner. This is precisely where shallow KYB, which stops at the first company on the register, quietly fails.
How does Zyphe approach KYB?
Zyphe treats KYB as an ownership-resolution and data problem, and solves it with breadth and automation. Business verification draws on more than 230 EU registries and coverage across 190 countries, so the entity and its filings can be confirmed against authoritative sources rather than a single patchy database. Ownership resolution is recursive, working through layered structures to identify beneficial owners down to a 0.001 percent stake, so control that is designed to stay hidden is still surfaced.
Every uncovered owner and director is then verified and screened, with individuals confirmed through chip-based identity verification and no image upload, and the business and its people checked against sanctions, PEP and adverse-media data. Because ownership shifts, monitoring is ongoing rather than a single onboarding snapshot. And because Zyphe is built on decentralised infrastructure, the sensitive data gathered during KYB is sharded rather than pooled into a central store, keeping verification thorough without creating a honeypot. The result is KYB software that resolves real ownership quickly and defensibly. Book a demo to see it against your onboarding.
The bottom line
KYB is KYC's harder sibling: instead of verifying one person, it verifies a company and then unmasks the people who ultimately own or control it. It is legally required for regulated firms serving business customers, and it is a real defence against the shell and layered structures that financial crime relies on. The difficulty is ownership opacity and uneven registry data, compounded by the need to keep everything current. The firms that do KYB well combine broad registry coverage, recursive ownership resolution, screening of every uncovered owner, and ongoing monitoring, so verification is both thorough and fast.
Related resources
- KYB software
- KYC vs KYB: what's the difference?
- KYC Software: 2026 Buyer's Guide
- Enhanced due diligence workflows
- PEP screening in 2026