Source of funds and source of wealth: what's the difference, and what operators actually ask for

Two different questions, often confused

Anyone who follows gambling compliance will have come across the term source of funds check. Less well understood is that regulators and operators actually work with two related but distinct concepts: source of funds and source of wealth. Getting the difference right matters because it changes what evidence a customer needs to produce, and how long that process takes.

Source of funds is about a specific pot of money: where did the cash sitting in this account, or used for this deposit, actually come from. Source of wealth is broader. It asks how a person built up their overall financial position over time, covering income, assets, inheritance, business ownership or other significant events that explain why someone can afford to gamble at the level they do.

A customer might be asked for source of funds evidence when a single deposit or a short run of deposits looks unusual. Source of wealth tends to come into play when overall spend patterns, over months or years, sit well outside what would be expected from a customer’s apparent circumstances, or when other risk indicators are present.

Why the distinction exists

Under the Gambling Commission’s Licence Conditions and Codes of Practice, operators must take a risk-based approach to anti-money laundering and to identifying customers who may be experiencing gambling harm. A narrow source of funds question can often be resolved quickly with a payslip or bank statement. Source of wealth reviews are inherently more intrusive because they ask about a person’s broader financial life, so operators are expected to reserve them for situations that genuinely warrant it, not apply them as a blanket exercise.

This matters for readers in the industry because getting the calibration wrong in either direction creates problems. Ask for source of wealth evidence too readily and customer friction and complaints rise, along with the compliance cost of processing documents that were never proportionate to the risk. Ask for source of funds evidence only, when the real question is about sustained affordability, and an operator can miss the point of the exercise entirely, ending up unable to explain to a regulator why a customer was allowed to continue losing large sums over an extended period.

What evidence looks like for each

Source of funds evidence is usually document-based and time-limited: recent payslips, a bank statement showing a specific deposit’s origin, evidence of a bonus payment, a P60, or documentation of a one-off event such as a matured savings product. The aim is to link a named, identifiable source to the money in question.

Source of wealth evidence is wider in scope and often requires more context. It might include several months or years of bank statements, evidence of business ownership or shareholdings, a copy of a will or grant of probate for an inheritance, property sale documentation, or a summary of a pension or investment portfolio. Operators will typically look for evidence that is contemporaneous, verifiable and consistent with what the customer has told them, rather than a single document taken at face value.

How operators decide which applies

In practice, most operators build tiered triggers into their monitoring systems. A deposit or loss threshold might prompt an automatic source of funds request. Sustained escalation beyond that, combined with other markers such as rapid staking increases, frequent top-ups, or behavioural indicators of harm, moves the case toward a source of wealth review, often handled by a specialist team rather than front-line customer support.

The threshold figures themselves are not fixed by law and vary between operators depending on their own risk assessment, so it is not something a trade title can state as a stable number. What is consistent, and checked by the Commission, is that operators can show their thresholds are proportionate, documented, and consistently applied.

What happens if a customer cannot or will not provide evidence

A customer who cannot satisfy a source of funds request for a specific deposit will typically have that deposit or transaction paused, refunded, or blocked until it is resolved. A customer who cannot satisfy a source of wealth review, which by definition concerns their ability to sustain play at a given level, faces a more serious outcome: a reduction in deposit or spending limits, or account restriction, pending further evidence or indefinitely if none is provided.

Operators are expected to communicate clearly why evidence is needed and what form it should take, and to avoid unnecessary delay once suitable evidence has been supplied. The Commission has taken enforcement action against operators for both failing to run these checks at the right trigger points and for asking for information in a way that was disproportionate or handled poorly, so the practical execution of the process is scrutinised as closely as the policy behind it.

The takeaway for compliance teams

Source of funds and source of wealth sit on the same spectrum but answer different questions, and treating them as interchangeable is one of the more common weaknesses regulators identify in operator AML and safer gambling frameworks. Clear internal definitions, proportionate triggers, and evidence requirements matched to the actual question being asked all reduce both regulatory risk and customer friction.

For current guidance on thresholds, documentation standards and regulatory expectations, always check the primary sources directly rather than relying on figures that may have moved on.