Source of Wealth (SoW)
How a customer accumulated their overall wealth, for example through employment, business ownership, investments or inheritance.
What Is Source of Wealth?
Source of wealth (SoW) describes how a customer came to have their total net worth: the activities and events that built up everything they own over time. Typical answers include employment income accumulated over a career, the sale of a business, an inheritance, investment returns, property holdings or a combination of these.
It differs from source of funds (SoF), which looks at where the money for a specific transaction or account funding comes from. A customer depositing the proceeds of a house sale has a clear source of funds for that deposit. Source of wealth asks the wider question: how did this person accumulate a property portfolio, a share portfolio and a private company in the first place, and does that story make sense?
Why Source of Wealth Matters
Criminals and corrupt officials need their wealth to look legitimate. Establishing source of wealth tests whether a customer's overall financial position is plausible given what is known about them. A mid-level public official with assets far beyond any plausible salary, or a young customer with significant wealth and no clear explanation, is a reason to ask more questions.
Source of wealth checks are most important for:
- Politically exposed persons and their relatives and close associates
- High-net-worth individuals in private banking and wealth management
- Customers from higher-risk jurisdictions or sectors
- Any relationship subject to enhanced due diligence
How Source of Wealth Is Established
Gather the narrative
The starting point is a clear account from the customer of how their wealth was built: career history, businesses owned and sold, inheritances, significant investments and their approximate timeline. Vague statements such as "business activities" or "family money" are not enough on their own.
Assess plausibility
Analysts compare the narrative with the customer's profile. Does the stated career explain the level of wealth? Do the dates line up? Is the claimed business real and of the right size? Public information, including corporate registries, news coverage and regulatory filings, can confirm or contradict the story.
Corroborate on a risk-sensitive basis
Depending on risk, firms may obtain supporting evidence such as:
- Employment contracts, payslips or tax returns showing income over time
- Sale agreements or completion statements for a business or property
- Probate documents or a will for an inheritance
- Audited accounts or dividend records for business ownership
- Investment statements showing how a portfolio grew
- Letters from regulated professionals, where these are reliable and appropriate
The level of evidence should be proportionate. Very high-risk relationships may warrant documentary proof for each major component of wealth; lower-risk ones may need only a credible narrative supported by public information.
Record the conclusion
The file should show what was claimed, what was checked, what evidence was relied on and why the analyst is satisfied, or what remains open.
Regulatory Expectations
The FATF Recommendations require firms to take reasonable measures to establish the source of wealth and source of funds of customers and beneficial owners identified as foreign PEPs, and of higher-risk domestic and international organization PEPs. The EU AML framework under Directive (EU) 2015/849 and the AML Regulation (EU) 2024/1624 includes establishing source of wealth and source of funds among the enhanced measures for PEPs and for business relationships involving high-risk third countries. The UK Money Laundering Regulations 2017 contain comparable requirements for PEPs. The Wolfsberg Group has also published guidance on source of wealth and source of funds, particularly for private banking.
Red Flags
- Wealth that is inconsistent with the customer's age, career or known income
- Reluctance to explain how wealth was acquired, or explanations that keep changing
- Wealth held mainly through opaque structures in secrecy jurisdictions
- Significant assets linked to public office, state contracts or sectors with high corruption risk
- Documents that look altered or come from unverifiable issuers
- Adverse media connecting the customer or their businesses to corruption, fraud or sanctions
Common Challenges
Wealth built over decades can be hard to document, especially from countries with limited public records. Customers may see detailed questions as intrusive, so relationship managers need to explain why they are asked. Firms also need to decide how much evidence is enough, apply that standard consistently, and refresh the assessment when the customer's circumstances or risk change.
How on8.ai Helps
SmartSanction supports the screening side of a source of wealth review: PEP screening, sanctions and adverse media checks on the customer, their businesses and related parties, with an ownership and relationship graph for corporate holdings. Each match comes with the reasoning behind it, which helps analysts document their conclusions.
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