"Source of funds" and "source of wealth" sound interchangeable, and they are constantly confused. They are not the same — and the difference is exactly what catches laundering. One asks where the money in this transaction came from; the other asks how the person became wealthy at all. Enhanced due diligence requires both, because either alone can be made to look innocent.
The two definitions
| Source of funds (SOF) | Source of wealth (SOW) | |
|---|---|---|
| Question | Where did THIS money come from? | How did you become wealthy overall? |
| Scope | The specific transaction/relationship | The person's entire financial history |
| Example answer | "A £200k transfer from my business account" | "30 years building and selling a manufacturing company" |
| Catches | Dirty money entering a single deal | A lifestyle that doesn't match legitimate income |
Why both matter
Checking only one leaves an obvious gap.
Match the claim to the right check
Decide whether each question is about source of FUNDS or source of WEALTH.
The question that ties them together
- Source of funds (this money)Does it fit?
- Source of wealth (overall)Does it fit?
- Both togetherDoes this person's money make sense for who they are?
When source of funds and source of wealth are consistent with each other and with the person's known profile, the relationship makes sense. When they diverge — a modest declared career but a large unexplained transfer — that gap is precisely the risk enhanced due diligence exists to surface. For PEPs, establishing source of wealth is a specific EDD requirement, because corruption shows up as wealth that outstrips legitimate office.
Evidence, not assertion
Where Probitas fits
Establishing source of funds and wealth is a documentary and judgement exercise that sits with you. Where Probitas helps is the surrounding picture: screening the individual and connected entities against sanctions, PEP and adverse media sources and surfacing the public record, so the wealth story can be assessed in context rather than on trust.
Source
What is the difference between source of funds and source of wealth?
Source of funds is where the specific money in a transaction or relationship came from. Source of wealth is how the person accumulated their overall wealth over their lifetime. One is about this money; the other is about the whole person.
Why does enhanced due diligence require both?
Because either alone can be made to look innocent. Source of funds can hide a laundering vehicle behind "my business account"; source of wealth can describe a plausible career while the actual funds come from elsewhere. Together they reveal whether the money fits the person.
Is source of wealth always required?
It is a specific requirement of enhanced due diligence, notably for PEPs, and in other higher-risk situations. For standard, lower-risk customers, source of wealth is not routinely required — the depth scales with risk.
What evidence is needed for source of funds or wealth?
Corroboration proportionate to risk — for example bank statements, business sale documents, audited accounts, or inheritance paperwork. A verbal claim like "savings" is not sufficient on its own for higher-risk cases.
How are these linked to PEP checks?
For PEPs, establishing source of wealth and source of funds is a core enhanced-due-diligence requirement, because corruption typically reveals itself as wealth that exceeds what legitimate public office could produce.
Sources
This guide is written from primary sources. Each is linked below; claims in the text link to the specific reference they rely on.