Singapore VCC insights

MAS Circular Source of Wealth: What AMLD 05/2026 Changes for Family Office Bank Onboarding

By VCC Editorial Team · Published 5 November 2026

Short answer: MAS Circular AMLD 05/2026, issued on 25 May 2026, tells financial institutions to establish a customer’s source of wealth in a risk-proportionate way: corroborate the material or higher-risk parts, avoid requests for long-dated records and repeated rounds of questions, and escalate red flags. It is guidance on applying existing rules. It does not lower them.

This article is general information only and is not legal, tax or immigration advice. For matters needing legal advice, we work with a panel of experienced Singapore law firms.

Principals who have opened private banking relationships in Singapore since 2023 will recognise what the Monetary Authority of Singapore (MAS) set out to correct: requests for long-dated employment records and several rounds of follow-up questions. The mas circular source of wealth guidance of 25 May 2026 is MAS’s response. This note explains what the circular says, what it leaves unchanged, and how a family office should prepare its file so that a bank can apply it. Every MAS statement below was checked on mas.gov.sg on 5 November 2026. The evidence for each type of wealth is covered in our guide to the family office bank account in Singapore and is not repeated here.

What did MAS issue on source of wealth in May 2026?

MAS issued Circular No. AMLD 05/2026, “Risk-Proportionate Source of Wealth Establishment”, on 25 May 2026. It asks financial institutions to avoid source of wealth steps that go beyond MAS’s requirements and international standards.

Source of wealth (SOW) means how a customer acquired their total body of wealth; source of funds is the origin of the particular money coming into the account. The circular states that MAS “would like to emphasise the importance of effective and efficient Source of Wealth (SOW) establishment processes which are risk proportionate, so that Singapore’s AML/CFT regime does not create undue burden on legitimate businesses and investors.” Its Annex is meant to help institutions “avoid excessive measures and process steps to establish customers’ SOW that are disproportionate to MAS’ requirements and international standards”, and institutions are “advised to incorporate into their SOW approaches risk principles such as materiality and relevance”. The MAS circular page describes it as additional guidance that institutions “are encouraged to incorporate”.

The same day, MAS Managing Director Chia Der Jiun explained the background in a speech at the UBS Asian Investment Conference. An Account Opening Workgroup under the Private Banking Industry Group (PBIG), co-led by MAS and industry, had “identified industry practices that go beyond what MAS’ and international standards required”. The circular was issued “building on the observations” of that workgroup.

What does the MAS circular source of wealth guidance ask banks to do?

It asks institutions to corroborate what matters rather than everything, to use information they already have, and to justify each further request by the customer’s actual risk. Red flags still go to senior management.

The Annex pairs each principle with a practice to avoid. The right-hand column below is our reading for a family preparing for onboarding, not MAS’s text.

What MAS asks institutions to do	What MAS asks them to avoid	What it means for a family office file
Focus on corroborating SOW information that is more material or of higher risk	Attempting to corroborate every single piece of SOW information	Identify the few events that created most of the wealth and support those thoroughly
Consider whether existing information is already sufficient, if supplemented by alternative, reliable information or reasonable and relevant benchmarks to estimate the value of the customer’s wealth	Unnecessary or unreasonable information requests, for example long-dated financial or employment records	Point the bank to public filings, audited accounts and announcements it can check itself
Consider whether there is a risk-based justification, based on the customer’s specific risk profile and circumstances, before seeking more information	Multiple rounds of information requests that could unreasonably delay onboarding without clear risk-based justification	Submit one complete, indexed pack so that follow-up questions are targeted
Take measures relevant and proportionate to the SOW risks posed by the customer	A one-size-fits-all approach to establishing SOW	Explain why the family’s profile, sector and geography carry the risk level they do

Two further points matter. Where institutions use the May 2025 best practice paper on source of wealth due diligence from the AML/CFT Industry Partnership (ACIP), MAS encourages them to apply it “in a targeted and risk-appropriate manner, rather than take a one-size-fits-all approach”. And “Where there are red flags that may indicate higher risk concerns, FIs should escalate such cases to senior management”, who should decide whether to establish the relationship and whether further risk-mitigating measures are needed.

How does the 2026 circular relate to the 2024 circular and MAS Notice 626?

It supplements them. The binding requirements remain in MAS Notice 626 for banks, and Circular AMLD 08/2024 remains the main statement of the risk principles that the 2026 circular puts into practice.

Notice 626, issued under section 16 of the Financial Services and Markets Act 2022 and last amended with effect from 1 July 2025, requires a bank to establish “by appropriate and reasonable means” the source of wealth and source of funds of politically exposed customers (paragraph 8.3(b)), and to apply the same measures to customers it assesses as higher risk (paragraph 8.7). The Guidelines to Notice 626 list examples of appropriate means at paragraph 8-5-7, from tax returns and audited financial statements to wills, conveyancing documents and credible public information sources.

Circular AMLD 08/2024 of 26 July 2024 said institutions “should not apply a one-size-fits-all approach for all customers” and set out three principles:

• Materiality: understand the whole body of wealth, focus corroboration on the parts that are more material or of higher risk, and assess whether the residual risk of uncorroborated wealth is acceptable.
• Prudence: for material wealth, use more reliable evidence such as audited accounts or documents from independent third parties, and keep any benchmarks reasonable and documented.
• Relevance: obtain fit-for-purpose evidence, and use credible public sources where possible.

The 2024 circular also said that, for customers with prominent public profiles, institutions “may corroborate their representations on their SOW against reliable public information sources”. The 2026 Annex turns these principles into specific practices to avoid.

What has not changed for a family office?

The standard has not changed. A Singapore private bank must still understand how the family’s wealth was made and corroborate the material parts. The circular targets the excess around that standard.

Paragraph 8-6-4(a) of the Guidelines to Notice 626 still says that, for private banking, “regardless of the bank’s internal risk classification of the customer”, source of wealth information “should be independently corroborated against documentary evidence or public information sources”. Paragraph 8-5-7A still expects a bank that cannot corroborate a material source to assess the residual risk and consider measures such as senior management approval or enhanced monitoring. Paragraph 8-5-7B still expects a bank to establish the legitimacy of a material gift and the plausibility of the giver’s own source of wealth.

MAS’s General Counsel, Paul Yuen, put it this way in a keynote address on 28 October 2026: institutions “should focus on corroborating material or higher-risk sources of wealth, rather than attempting to verify every historical detail”, while “material discrepancies must continue to receive appropriate scrutiny”. In his words, “The objective is not to weaken due diligence standards, but to achieve more effective risk assessment while reducing unnecessary delays and costs.” A thin file will not pass more easily. A well-organised one should pass faster.

Why does this matter more for a single family office in 2026?

Because a bank account is now a condition of both the single family office (SFO) licensing exemption and the fund tax incentives. Onboarding delays affect regulatory status as well as investment timing.

Under the revised SFO framework in force since 15 June 2026, MAS’s media release says qualifying SFOs “need only notify MAS of their operations, and maintain an account with a MAS-licensed bank”; existing SFOs have until 15 June 2027 to comply. Mr Yuen added that “Banks maintaining the prescribed accounts remain responsible for conducting AML/CFT checks under MAS requirements.” The bank’s source of wealth review is part of the framework’s design.

MAS FDD Circular 05/2026 of 31 July 2026 adds a tax condition: a section 13O, 13OA or 13U SFO fund with an award approved on or after 1 August 2026 must have a private banking account with an MAS-licensed financial institution at application and throughout each basis period, and MAS may revoke the award if this is breached. Existing awards without a banking condition were given a three-month grace period from 1 August 2026. Our note on the SFO fund banking account condition covers existing awards, and the MAS SFO transition evidence pack covers notification.

On timing, Deputy Prime Minister and MAS Chairman Gan Kim Yong said on 5 October 2026 that PBIG had committed to reducing its member banks’ median account opening time to within one month by the end of the year, and that nearly half of new accounts opened by member banks over the previous three months had been completed within a month. These are medians, not a service standard for any individual case.

How should a family office prepare its source of wealth file under the circular?

Build the file around materiality: a short narrative, the few events that account for most of the wealth, the best independent evidence for each, and a clear note of what cannot be documented and why.

1. Estimate the family’s total wealth and break it into its main sources, such as business ownership, a sale or listing, property, inheritance and investment returns, with approximate values.
2. Rank the sources by size and risk. The largest, and any connected with higher-risk jurisdictions, sectors or politically exposed persons, are where a bank will focus.
3. For each material source, assemble third-party evidence first: audited accounts, completion statements, probate documents, tax filings, or public announcements and registry records.
4. For older or minor sources, record why documents are unavailable and offer reasonable alternatives, such as public information or an estimate with its assumptions shown.
5. Prepare the structure chart, controllers and purpose of each entity, so that the source of funds trail into the SFO, its fund vehicles and any family VCC source of wealth file is consistent.
6. Submit one indexed pack, and keep a log of each bank’s questions and answers so that evidence is reused across relationships and periodic reviews.

Banks compare what the family tells them with statutory records, so a current register of registrable controllers avoids an unnecessary query. For the company administration around these entities, Raffles Corporate Services also publishes free tools.

What should a family do if a bank still asks for everything?

Engage on substance and in writing. Ask which source of wealth the bank regards as material or higher risk, and offer the most reliable evidence for that source.

The circular is addressed to institutions. It gives customers no right to refuse information, it does not stop a bank asking for more where its risk assessment supports the request, and each bank may still decline a relationship. What it gives a family is a shared vocabulary: materiality, relevance and risk-based justification. A request for payslips from early in a principal’s career, where the wealth came from a later business sale, can reasonably be met by explaining that the sale is the material source and supplying the completion statement and tax filings for it. Where a request relates to a red flag, expect escalation rather than a shortcut. For later reviews, see our sister site’s guide to a bank KYC review of a company account, and for the Hong Kong comparison, private bank onboarding in Singapore and Hong Kong.

Frequently asked questions

Is the May 2026 MAS circular legally binding?

It is guidance. The binding requirements remain in MAS Notice 626 and the corresponding notices for other sectors. MAS advises institutions to incorporate the circular’s principles into their source of wealth approach.

Will banks now accept a source of wealth declaration without evidence?

No. Private banks are still expected to corroborate source of wealth independently against documentary evidence or public information sources. The change is in focus: material and higher-risk sources rather than every detail.

Will MAS publish more guidance?

The circular says MAS will provide additional industry case studies to help institutions calibrate their approach, building on its existing papers. The circular gives no date for them.

How long does private bank account opening take now?

MAS put the median at about 6 weeks in May 2026, with a target of within a month. In October 2026, Deputy Prime Minister Gan said nearly half of new PBIG member accounts in the previous three months opened within a month.

Need help with this? Call, SMS or WhatsApp +65 8501 7133, or email hello@rafflescorporateservices.com. Raffles Corporate Services works with a panel of corporate and employment law firms; this article is general information, not legal advice.

Last reviewed: 5 November 2026. The Editorial Team, Variable Capital Companies Act.