Why does my private bank in Singapore ask about my source of wealth?
Your private bank asks about your source of wealth because MAS rules require it to. MAS Notice 626 makes every bank in Singapore establish the source of wealth and source of funds of politically exposed persons and other higher-risk customers, and MAS's guidelines tell banks to corroborate the source of wealth of private-banking clients regardless of the bank's internal risk classification of the customer. MAS has also told banks, in a circular of 25 May 2026, to keep these checks proportionate to the risk.
Checked against MAS Notice 626, the Guidelines to Notice 626, MAS circulars AMLD 08/2024 and AMLD 05/2026 and MAS releases on 19 October 2026. General information, not legal or compliance advice.
- TL;DR — short answer
- Source of wealth is how you built your total wealth. Source of funds is where the particular money you are putting into the account came from. Under MAS Notice 626 (last revised 30 June 2025) a bank must establish both for politically exposed persons and other higher-risk customers. MAS treats private banking as inherently higher risk and tells banks to corroborate private-bank clients' source of wealth whatever their risk rating. In July 2025 MAS fined nine financial institutions S$27.45 million in total, and all nine had failed to follow up source-of-wealth red flags. In May 2026 MAS told banks not to overdo it: no corroborating every detail, no requests for long-dated records without a reason. This page is general information, not legal or compliance advice.
Which MAS rule requires source-of-wealth checks?
The rule for banks is MAS Notice 626 on Prevention of Money Laundering and Countering the Financing of Terrorism. It applies to all banks in Singapore, took effect in its current version on 1 April 2024 and was last revised on 30 June 2025. Paragraph 8 sets out enhanced customer due diligence, the extra checks for higher-risk relationships. Each breach of the Notice is an offence with a maximum fine of S$1,000,000.
Sources: MAS Notice 626 — Prevention of Money Laundering and Countering the Financing of Terrorism (Banks) (last revised 30 June 2025), paras 8.1–8.7; Guidelines to MAS Notice 626 (last revised 1 July 2025), para 8-6-4. "Must" is the Notice; "should" is the Guidelines. Related: politically exposed person, AML/CFT, KYC.
What is the difference between source of wealth and source of funds?
Source of wealth
MAS: the origin of the customer's entire body of wealth (total assets). It is about how you came to have your wealth (a business you built or sold, employment income, an inheritance, investment gains), including seed money and gifts. It is not a list of the assets you hold.
Source of funds
MAS: the origin of the particular funds or other assets in the relationship, such as the amounts being invested, deposited or wired. The bank should not stop at which institution sent the money; it should understand the activity that generated it. MAS's examples: salary payments or sale proceeds.
●MAS Guidelines 626 · 19 Oct 2026Source: Guidelines to MAS Notice 626, paras 8-5-5 and 8-5-6. See also source of wealth and beneficial owner.
What documents might a bank ask for?
There is no MAS checklist, and each bank sets its own. What MAS does publish is a list of examples of "appropriate and reasonable means" of establishing source of wealth or source of funds:
- copies of trust deeds
- salary details
- tax returns
- bank statements
- audited financial statements of a company or trust the customer owns or controls
- site visits
- a copy of the will, where the wealth is an inheritance
- conveyancing documents, where the wealth is from a property sale
- credible public information sources
Where a material part of your wealth was a gift, MAS says the bank should establish the giver's relationship to the customer, the transfer itself, and the plausibility of the giver's own wealth. MAS's 2024 circular adds that, for material wealth, banks should prefer more reliable evidence such as audited accounts or documents from independent third parties like tax accountants. For customers with a prominent public profile, banks may check what they are told against reliable public sources.
●MAS Guidelines 626 · 19 Oct 2026Source: Guidelines to MAS Notice 626, paras 8-5-7, 8-5-7B, 8-6-1; MAS Circular AMLD 08/2024 — Establishing the Sources of Wealth of Customers paras 3–4. The AML/CFT Industry Partnership (ACIP), a public-private partnership, has published more detailed practices in the ACIP industry paper on source-of-wealth due diligence (May 2025), which says it sets no additional requirements.
Does a bank have to check every part of my wealth?
No. MAS has twice told financial institutions to keep these checks proportionate. In 26 July 2024 it set out three principles, materiality, prudence and relevance, and said banks should not apply a one-size-fits-all approach. Then Circular No. AMLD 05/2026, "Risk-Proportionate Source of Wealth Establishment", 25 May 2026 said MAS wants the AML/CFT regime not to create undue burden on legitimate businesses and investors. Its annex lists practices to avoid:
- Attempting to corroborate every single piece of source-of-wealth information.
- Unnecessary or unreasonable information requests, such as long-dated financial or employment records.
- Multiple rounds of information requests that unreasonably delay onboarding without a clear risk-based justification.
- A one-size-fits-all approach to establishing a customer's source of wealth.
The circular also says red flags should still be escalated to the bank's senior management. A working group under the Private Banking Industry Group, co-led by MAS, is working on account-opening efficiency. MAS's Chairman said on 5 October 2026 that its member banks had committed to median account opening within one month by the end of 2026.
●MAS AMLD 05/2026 · 19 Oct 2026Sources: MAS Circular AMLD 05/2026 — Risk-Proportionate Source of Wealth Establishment, paras 1–4 and Annex; listed in the MAS Annual Report 2025/2026 — Responsible and Trusted Financial Centre; MAS — Opening remarks by DPM Gan Kim Yong at the WMI Global-Asia Family Office Summit, 5 October 2026, paras 12–14.
What happens if the bank cannot verify my source of wealth?
MAS's guidelines say the bank should assess residual risk; senior-management approval and enhanced monitoring; consider ending the relationship and filing a suspicious transaction report if legitimacy cannot be ascertained.
For complaints about how a financial institution handled your account, see dispute resolution in Singapore.
Why are Singapore banks careful about source of wealth?
Enforcement. On 4 July 2025, MAS imposed composition penalties of S$27.45 million on nine financial institutions: six banks, two capital markets services licence holders and one licensed trust company. The breaches were linked to the major money-laundering case of August 2023. MAS found that all nine had failed to detect or adequately follow up significant discrepancies or red flags that should have cast doubt on some customers' stated source of wealth, and in some cases had not corroborated significant parts of it. MAS also issued prohibition orders and reprimands to individual staff.
International assessment. The Financial Action Task Force (FATF) published its 5th-round mutual evaluation of Singapore on 6 May 2026. According to the joint MAS, Ministry of Home Affairs and Ministry of Finance release, the outcome placed Singapore on Regular Follow-up, the process for FATF members that have done well, an improvement on the 2016 results. The report also made recommendations, for example on risks from foreign legal persons and legal arrangements.
●MAS enforcement · 19 Oct 2026Sources: MAS — MAS Takes Regulatory Actions against 9 Financial Institutions for AML-Related Breaches (4 July 2025), paras 2–5; MAS-MHA-MOF — Singapore has a robust framework for combatting financial crime according to international body (6 May 2026), paras 1–4.
Do the same checks apply to family offices and non-bank wealth managers?
MAS sets parallel anti-money-laundering requirements for other institutions: MAS Notice 1014 (merchant banks), SFA04-N02 (capital markets intermediaries), TCA-N03 (licensed trust companies). A single family office must hold an account with an MAS-licensed bank, and MAS's FAQs say the bank must run its anti-money-laundering checks on the family office and its investment vehicles. See single family offices and MAS. For independent wealth managers, see external asset managers in Singapore.
Primary sources
- · MAS Notice 626 — Prevention of Money Laundering and Countering the Financing of Terrorism (Banks)
- · Guidelines to MAS Notice 626
- · MAS Circular AMLD 08/2024 — Establishing the Sources of Wealth of Customers
- · MAS Circular AMLD 05/2026 — Risk-Proportionate Source of Wealth Establishment
- · MAS — MAS Takes Regulatory Actions against 9 Financial Institutions for AML-Related Breaches
- · MAS-MHA-MOF — Singapore has a robust framework for combatting financial crime according to international body
- · MAS Annual Report 2025/2026 — Responsible and Trusted Financial Centre
- · ACIP industry paper on source-of-wealth due diligence (May 2025)
- · MAS — Opening remarks by DPM Gan Kim Yong at the WMI Global-Asia Family Office Summit, 5 October 2026
Every statement on this page was checked against the source on 19 October 2026 (18 facts). General information only, not legal, compliance or financial advice. It describes what MAS requires of banks; it is not guidance on any individual account. For questions about your own situation, speak to your bank or a Singapore lawyer.
Source of wealth checks in Singapore: FAQs
Why does my private bank in Singapore ask about my source of wealth?
Because MAS requires it. MAS Notice 626 requires every bank in Singapore to establish the source of wealth and source of funds of politically exposed persons and customers it assesses as higher risk. MAS's Guidelines to Notice 626 add that, for private banking, which MAS says inherently presents higher money-laundering risk, a bank should corroborate source-of-wealth information regardless of the bank's internal risk classification of the customer.
What is the difference between source of wealth and source of funds?
MAS defines source of wealth as the origin of the customer's entire body of wealth (total assets): how you acquired it, including seed money and gifts, not just a list of what you own. Source of funds is the origin of the particular funds or other assets in the relationship, such as the money you are depositing or transferring. For source of funds, MAS says the bank should look at the activity that generated the money, not just which bank it came from.
What documents might a bank ask for to show source of wealth?
MAS does not set a fixed list, and each bank decides what it needs. MAS's guidelines give examples of appropriate evidence: copies of trust deeds, salary details, tax returns, bank statements, audited financial statements of a company or trust the customer owns or controls, site visits, a copy of the will, where the wealth is an inheritance, conveyancing documents, where the wealth is from a property sale, credible public information sources. MAS also tells banks to focus on the parts of your wealth that are material or higher risk.
Does a bank have to check every part of my wealth?
No. MAS circular AMLD 05/2026 of 25 May 2026 tells financial institutions to avoid trying to corroborate every single piece of source-of-wealth information, to avoid unreasonable requests such as long-dated financial or employment records, and to avoid repeated rounds of questions without a risk-based reason. Banks should focus on material or higher-risk sources of wealth.
What happens if a bank cannot verify my source of wealth?
MAS's guidelines say the bank should assess the remaining risk and may need senior-management approval and closer monitoring. If it cannot establish that the wealth is plausible and legitimate, it should consider whether to end the relationship and whether to file a suspicious transaction report. The decision is the bank's.
Why did MAS fine banks over source of wealth?
On 4 July 2025, MAS imposed composition penalties of S$27.45 million on nine financial institutions over anti-money-laundering breaches linked to the major money-laundering case of August 2023. MAS found that all nine had failed to detect or adequately follow up significant red flags that should have cast doubt on some customers' stated source of wealth.
How did Singapore do in its FATF evaluation?
The Financial Action Task Force published its 5th-round mutual evaluation of Singapore on 6 May 2026. According to MAS, the outcome placed Singapore on Regular Follow-up, the process for members that have done well, and improved on its 2016 results. The report also recommended further work, for example on foreign legal persons and arrangements.
Do the same rules apply to wealth managers that are not banks?
Similar rules do. MAS sets anti-money-laundering requirements for other institutions in parallel notices: MAS Notice 1014 (merchant banks), SFA04-N02 (capital markets intermediaries), TCA-N03 (licensed trust companies). A wealth manager that is not a bank follows the notice for its own licence type.