Preparing one source-of-wealth file for Singapore institutions

Singapore banks, insurers and trustees must establish a customer's source of wealth for politically exposed persons and other higher-risk customers, and industry guidance expects private banks and wealth managers to do so for every customer. Because each institution reviews independently, a family is best served by one dated file — a timeline, a narrative and an evidence index — shared consistently with all of them.

What source of wealth means

Source of wealth (SoW) is the origin of a customer's — and any beneficial owner's — entire body of wealth, meaning their total assets. MAS's Guidelines to Notice 314 for life insurers use this definition, and the same wording appears in the industry best-practice paper published in May 2025 by the AML/CFT Industry Partnership (ACIP). Source of funds (SoF) is narrower: the origin of the specific money used for a particular transaction, such as the premium for a policy or the initial deposit into an account.

The difference matters in practice. An institution checking SoF wants to see where a particular transfer came from, for example the sale proceeds of a property. An institution checking SoW wants to understand how the family came to own everything it owns — usually a business built over decades, an inheritance, investment gains or a career — and whether that story is plausible and supported. A SoW file is the organised set of documents and explanations that answers the second question. It is prepared by the family with its accountant and lawyer, and reviewed independently by each bank, insurer and trustee.

Who must establish it, and why

Singapore's requirements come from MAS notices and guidance, reinforced by industry practice.

The ACIP paper also refers to MAS Circular AMLD 08/2024 on establishing the sources of wealth of customers and to MAS's October 2024 information paper on supervisory expectations from recent inspections. The wider context is the 2023 money-laundering case: the inter-ministerial committee's report of 4 October 2024 set out three pillars — proactive prevention, timely detection and effective enforcement — including stronger AML standards for gatekeepers.

The practical consequence for an international family is that an onboarding with a Singapore private bank, a large insurance application and a trust settlement will each involve a SoW review, and each institution is responsible for its own conclusion.

Evidence by wealth type

ACIP's paper describes corroborating the customer's background, investment history, business activities and occupation "against documentary evidence and/or public information sources". The table sets out commonly requested evidence. It is illustrative; each institution decides what it needs and may ask for more.

One file, several institutions

Because banks, insurers and trustees review independently, the same family is often asked similar questions several times. Inconsistencies between versions — a different date for a business sale, a different ownership percentage, a different explanation of a large transfer — are one of the commonest reasons a review is reopened. A single, dated SoW file avoids this.

A practical structure:

1. Family and entity map — individuals, relationships, tax residence and every holding entity, with ownership percentages.
2. Wealth timeline — the main events by year: founding, funding rounds, dividends, sales, inheritances, property transactions.
3. Narrative — a short factual account consistent with the timeline, prepared with the family's accountant.
4. Evidence index — each document, its date, issuer and the timeline event it supports.
5. Current transaction note — the SoF for the specific account, policy or settlement.
6. Version log — what changed, when, and which institutions received which version.

The professional-collaboration model assigns ownership of this file, usually to the lead adviser working with the family's accountant. The same facts also drive tax residence declarations under CRS — see residency and tax.

Controllers, nominees and trusts

Institutions look through companies and trusts to the people who own and control them, so the SoW file must match the corporate and trust records.

• Registrable controllers. Under ACRA's RORC Guidance for Companies (Version 2.0, 16 June 2025), a person with an interest in more than 25% of a company's shares, or more than 25% of voting rights, or the right to share in more than 25% of capital or profits, is generally a registrable controller. Companies incorporated on or after 16 June 2025 must keep the register from incorporation and file controller information at incorporation; updates must be filed with ACRA within 2 business days of entering or updating the register. ACRA has kept a central register of controllers since 30 July 2020 (same guidance).
• Nominee directors. Since the Corporate Service Providers Act 2024 took effect on 9 June 2025, a person acting as a nominee director by way of business must be arranged by a registered corporate service provider, which must be satisfied that the person is fit and proper.
• Trusts. For a trust, institutions typically need to understand the settlor's SoW (how the assets put into trust were obtained), as well as the identity of trustees, protectors and beneficiaries. A licensed trust company acting as trustee falls within the wealth management segment covered by the ACIP paper.

Where the file shows a controller or settlor whose wealth is not documented, expect the review to focus there.

What delays onboarding, and what to avoid

Common causes of delay:

1. Narratives that differ between institutions or between the narrative and the documents.
2. Long gaps in the timeline, especially early business years.
3. Wealth held or transferred through relatives or nominees without clear documentation.
4. Recent, large or unexplained transfers immediately before onboarding.
5. Missing records for entities that have since been dissolved.

What families and advisers should not do:

• Edit, re-create or selectively omit documents.
• Split transfers to stay under reporting or review thresholds.
• Present money as coming from a different source to fit an institution's preferences.
• Use undisclosed nominee arrangements or informal channels to move funds across borders.

For cross-border transfers, each jurisdiction's foreign-exchange and reporting rules apply; for Chinese mainland residents, these include outbound remittance controls that must be followed through authorised channels. This site does not provide routes around any such rules.

If you need these points applied to your own circumstances, you can register your enquiry through the contact options on this site.