KYC vs KYB: What Is the Difference and When You Need Both
KYC (Know Your Customer) verifies that an individual is who they claim to be.
KYB (Know Your Business) verifies that a company is real, legally registered, and reveals who actually owns and controls it. If your customers are people, you run KYC. If your customers are companies, you run KYB, and then you run KYC on the humans behind those companies.
That last part surprises teams building their first B2B onboarding flow. KYB is not a replacement for KYC. It is a wrapper around it.
What KYC checks
A standard KYC process answers three questions about a person. Is this a real identity? Is this person actually the one presenting it? And is this person on any list that should stop me from doing business with them?
In practice that means verifying a government ID, matching the face on the document to a live selfie, and screening against sanctions lists, PEP registries, and watchlists. Modern flows do this in seconds. KYCAID's average verification time is 11 seconds across 240+ countries.
What KYB checks
KYB answers a different set of questions. Does this company legally exist? Is its registration active and its documents genuine? Who are its directors and authorized representatives? And, the hard one, who are its Ultimate Beneficial Owners, the actual humans who own or control it?
UBO verification is where KYB gets difficult. Ownership often hides behind layers: Company A is owned by Company B, which is owned by a trust, which benefits an individual in another jurisdiction. Regulators in the US (FinCEN's beneficial ownership rules), the EU (AMLD directives), and the UK generally require identifying anyone with 25% or more ownership. Each of those individuals then goes through KYC.
So a single KYB case typically contains: corporate registry checks, document verification of incorporation papers, verification of the authorized signatory, and full KYC on every UBO. That is why KYB business verification takes longer than individual checks. KYCAID's maximum turnaround is 24 hours, against an 11-second average for individuals.
Side by side
KYC | KYB | |
|---|---|---|
Subject | An individual | A legal entity |
Core checks | ID document, biometrics, watchlists | Registry status, corporate documents, UBOs, directors |
Typical time | Seconds | Hours to days |
Triggered by | Consumer signup | Business account, merchant, partner, vendor onboarding |
Regulation | AML/CFT rules for individuals | Same frameworks, plus beneficial ownership rules |
Contains the other? | No | Yes, KYC on UBOs and signatories |
Who is required to do which
Banks, payment companies, crypto exchanges, and lenders are required to do both, depending on customer type. B2B marketplaces and payment facilitators onboarding merchants need KYB, and card network rules push it even where local law is quiet. iGaming operators mostly run KYC on players but need KYB for affiliates and payment partners. A B2B SaaS company with no money movement usually is not legally required to run either, but many still verify customers to control fraud and sanctions exposure.
The pattern to remember: follow the money and follow the contract. If either one touches a company, KYB applies. If either one touches a person, KYC applies. Most real businesses touch both.
What this means for your onboarding flow
Do not build two separate systems. The efficient design is one flow with a branch: an applicant declares whether they are an individual or a business, and the business branch collects registry data and UBO details, then routes each UBO through the same individual identity verification used for consumers. One vendor, one API, one audit trail. Split systems mean split records, and split records are what auditors write findings about.
FAQ
🔹Is KYB legally required? For regulated financial institutions onboarding business customers, yes, in the US, EU, UK, and most major markets. For unregulated businesses it is often a contractual requirement from banks and card networks rather than a direct legal one.
🔹What is a UBO? An Ultimate Beneficial Owner: a natural person who ultimately owns or controls a company, typically defined as holding 25% or more of shares or voting rights. UBOs must be identified and individually verified as part of KYB.
🔹Does KYB include KYC? Yes. Verifying a company always ends with verifying people: its UBOs and its authorized representatives each go through a standard KYC check.
🔹How long does KYB take compared to KYC? Individual KYC is near-instant with automated tools, around 11 seconds on KYCAID. KYB involves registries and documents and takes longer. Automated KYB with human review typically completes within 24 hours.