The distinction between Source of Funds and Source of Wealth is not new, and most conveyancers understand it perfectly well. Source of Funds examines the funds used in a specific property transaction, while Source of Wealth looks at how the client built their overall financial position.
The issue is not a lack of understanding. It is that the market is creating confusion by blurring the language, often through tools marketed in ways that make complex checks sound far simpler than they really are.
There is clear value in making Source of Funds reports easier to review. AI-generated summaries can save time, pull together key points, and help conveyancers quickly understand the story behind transaction money. It can show whether the deposit came from salary, savings, a gift, inheritance, asset sales, or another source, and flag where further questions may be needed.
However, that is still Source of Funds. A polished narrative or sophisticated presentation does not change the nature of the check. No matter how fluent the language or clever the technology behind it may be, it remains a Source of Funds review if the underlying evidence relates only to the funds used for the purchase.
Source of Funds vs Source of Wealth
Source of Funds follows the transaction. If a buyer is putting £80,000 into a purchase, the firm needs to understand how that £80,000 was accumulated. It is not enough to know where the money sits today; the important question is how it got there, whether the explanation is credible, and whether the evidence supports it. This may involve reviewing savings, income, gifts, inheritance, transfers between accounts, or asset sales, but the focus remains on the transaction money.
Source of Wealth is broader. It asks how the client accumulated their total wealth over time. It is not limited to the deposit or completion monies, and it may require a much broader evidence base across the client’s wider financial standing.
The two checks can inform each other, and in some rare cases they may look similar. A first-time buyer whose only asset is their deposit, or a single inheritance or compensation payment, may present similar Source of Funds and Source of Wealth positions. But these are exceptions, not the norm, and should not be treated as such.
The risk is thinking the job has been done
The main regulatory risk is not that a firm decides Source of Wealth is unnecessary. A risk-based assessment may legitimately conclude that Source of Funds is sufficient. The greater risk is believing Source of Wealth has been completed when the work done only supports Source of Funds.
That matters most in higher-risk cases. Under the legal sector AML framework, and in line with the Legal Sector Affinity Group (LSAG) guidance, firms are expected to apply a risk-based approach to the level of due diligence required. Higher-risk cases may need Source of Wealth, while lower-risk matters may only require Source of Funds. The point is to match the depth of check to the level of risk, not to assume that a single tool or report can cover everything by default.
This becomes critical in politically exposed client cases, complex funding structures, overseas wealth, or where initial reviews raise further questions. In those situations, understanding the deposit alone is not enough. The transaction may make sense, but the wider wealth picture may still require scrutiny.
The firm remains responsible for the AML decision. A provider can support by structuring the information and improving usability of reports, but it cannot change the scope of the underlying check.
Doing more is not always safer
Some firms respond to uncertainty by defaulting to Source of Wealth checks on every client, which may sound cautious but is not automatically a stronger position. Source of Wealth reviews are broad, intrusive and often complex. If they are not required, firms risk collecting unnecessary personal information, creating friction, and slowing transactions without improving risk-adjusted outcomes.
A proper risk-based approach is about doing the right check, for the right reason, and recording why. Firms do not need to turn every matter into a full wealth review, but they do need to be clear about when Source of Funds is enough, when Source of Wealth is required, and what each output actually proves.
AI does not remove professional judgement
Technology should support judgement, not replace it. Conveyancers remain the last line of defence in property transactions, but they should not be burdened with manually reconstructing every financial trail.
Good technology can structure data, highlight gaps, explain risk, and make reviews more efficient. The danger is that a polished narrative can be misleading if it gives the impression that more has been checked than actually has.
AI can organise and explain information, but it cannot expand the scope of a review beyond the data it has been given. The right question is not whether the output sounds comprehensive, but what data it relied on, what it assessed, and what decision it can properly support.
The direction of travel
The SRA’s recent thematic review on Source of Funds and Source of Wealth compliance reinforces the need to strengthen scrutiny, record-keeping, and the rationale behind decisions. The direction is not towards more paperwork, but towards better evidence that firms understand risk and respond appropriately.
As digital onboarding and AI-assisted reviews become more common, maintaining the distinction between Source of Funds and Source of Wealth becomes more important. Firms should welcome tools that improve efficiency, but remain cautious of language that makes a useful summary sound like a different check.
A Source of Funds summary can be valuable, and it can help conveyancers understand the file faster and work more efficiently, but it is still a Source of Funds summary. Source of Wealth is a completely different exercise, asking a wider question and requiring a wider evidence base. The profession does not need to relearn the distinction; it simply needs to protect it from being blurred by convenience, marketing language, or misplaced confidence in a well-written output.
About the author
Mike Ward is executive chairman at Armalytix, a financial data intelligence firm that works across the property market on Source of Funds, AML, ID, and affordability checks.
