KYB (Know Your Business) is the process a bank, payments company or fintech uses to confirm that a business customer exists, understand what it does, and identify the people who own and control it. In finance, KYB has nothing to do with the KYB brand of shock absorbers; it is the business-customer counterpart of KYC.
Why it matters in KYB review
A business account gives its controllers access to payment rails under a legal entity's name. If the entity is a front, the institution is moving money for whoever sits behind it. In the US, the legal footing for KYB comes from two Bank Secrecy Act rules. The Customer Identification Program rule requires banks to collect, for a non-individual, a principal place of business and a taxpayer identification number, and lists documents that show an entity exists, such as certified articles of incorporation or a government-issued business license (31 CFR 1020.220). The Customer Due Diligence rule requires covered institutions to identify and verify the beneficial owners of legal entity customers (31 CFR 1010.230).
What an analyst checks
A complete KYB review usually covers:
- Existence and status: the registry record, formation documents and current standing. See certificate of good standing and articles of incorporation.
- Identifiers: EIN or other tax ID, matched to the legal name. See EIN confirmation letter.
- Ownership and control: every ultimate beneficial owner at or above the 25% threshold and one control person.
- Screening: sanctions, PEP and adverse media on the entity and its people.
- Business model: does the website, product and expected activity match what the applicant declared?
- Addresses and footprint: is the stated address an operating location or a registered agent address?
The output is a recommendation with the evidence behind it, packaged as an evidence packet.
Common pitfalls
- Treating collection as verification. A PDF uploaded by the applicant is a claim. The analyst still has to tie it to an independent source.
- Stopping at the first layer. A parent company listed as the 100% owner is not a beneficial owner. The analyst has to walk the chain to natural persons.
- One-and-done reviews. Ownership, status and business model change. US banks must update customer information on a risk basis (31 CFR 1020.210), which is why periodic review exists.
- Search collisions. Queries for "KYB" alone return automotive parts. Internal documentation and job titles work better with a finance co-term, such as "KYB review" or "KYB verification".
Related terms
KYB vs KYC, business onboarding review, business verification documents, KYB manual review queue, KYB refresh.
How Sweat AI fits
Sweat AI is an AI-native BPO for banks and fintechs, and KYB is where it starts: analysts working with AI tools clear your onboarding queue around the clock and return each case with its evidence and a recommendation, while the approval decision stays with your team. See how a KYB review works or read a sample review.
Questions
Is KYB a legal requirement?
The term itself is industry shorthand. In the US, the underlying duties come from the Customer Identification Program rule and the Customer Due Diligence rule under the Bank Secrecy Act, which require covered institutions to verify legal entity customers and identify their beneficial owners.
Does KYB end at onboarding?
No. US banks must keep customer information, including beneficial ownership, up to date on a risk basis. That is the job of KYB refresh and periodic review.
Sources
- 31 CFR 1010.230, Beneficial ownership requirements for legal entity customers (eCFR), accessed 2026-09-30
- 31 CFR 1020.220, Customer identification program requirements for banks (eCFR), accessed 2026-09-30
- 31 CFR 1020.210, Anti-money laundering program requirements for banks (eCFR), accessed 2026-09-30