How to Structure a 13O Family Office in Singapore: A Comprehensive Guide

A Section 13O family office is a Singapore-based fund vehicle managed by a single-family office that qualifies for tax exemption on specified income derived from designated investments. As of March 2026, the Monetary Authority of Singapore (MAS) has approved more than 750 such structures, with aggregate assets under management exceeding S$65 billion—a 12% increase from the same period in 2025. This guide provides a step-by-step framework for structuring a compliant 13O vehicle, reflecting the latest regulatory requirements and market practice.

What Is a 13O Family Office?

Section 13O of the Income Tax Act 1947 exempts a Singapore-incorporated fund company from tax on gains from stocks, bonds, derivatives, and other specified investments, provided the fund is managed by a family office entity in Singapore. The regime, formerly the 13R scheme, was enhanced in 2023 and refined through MAS circulars in 2025. Unlike the 13U scheme for larger structures, 13O is tailored for families committing at least S$20 million in assets, with lighter initial operational costs. The family office—typically a private company—employs investment professionals and oversees the fund, while the fund itself holds investments. The exemption is perpetual once conditions are met, but annual compliance filings are mandatory.

Minimum AUM and Asset Eligibility

A newly established 13O fund must appoint a Singapore-based fund manager and commit to a minimum AUM of S$20 million at the point of application. If the fund is launched with lower capital, the MAS allows a two-year grace period to ramp up, but by the end of the second financial year, the audited net asset value must reach S$20 million. Assets can include cash, listed equities, bonds, unit trusts, and alternative investments such as private equity or hedge fund stakes. Family offices often seed the fund with a global custody account or a transfer of existing portfolios. In 2026, the MAS clarified that digital payment tokens and certain structured notes do not automatically qualify as designated investments unless specifically carved in; a legal review is recommended.

Local Investment Requirements and the S$200,000 Floor

Each 13O fund must invest the higher of S$200,000 or 10% of its AUM in “local investments.” The MAS defines these as:

• Equities listed on the Singapore Exchange (SGX)
• Corporate bonds issued by Singapore-domiciled entities and listed in Singapore
• Units in Singapore-domiciled funds
• Loans to Singapore-incorporated companies (excluding related parties)
• Government securities and statutory board bonds
  A fund with S$50 million AUM, for example, must allocate S$5 million to local assets. A S$200,000 minimum applies even to the smallest qualifying AUM. The local investment test is assessed at the end of each financial year based on audited financial statements. Many families use separately managed accounts or passive SGX ETFs to satisfy this requirement efficiently. As at end-2025, MAS data showed that the average local investment allocation across all 13O funds was 12.3% of AUM.

Business Spending Tiers and Qualifying Expenses

To anchor economic substance, the family office managing the 13O fund must incur total business spending (TBS) in Singapore according to a tiered structure, effective from January 2026:

AUM Band (S$ million)	Minimum TBS (S$)
20 – 49	250,000
50 – 99	500,000
100 and above	1,000,000

TBS includes employee remuneration, office rent, professional fees, and IT subscriptions, but excludes investment-related costs borne by the fund (e.g., brokerage, custody). At least 50% of TBS must be attributable to salary and bonuses for tax-resident investment professionals. If the office employs fewer than three such professionals, the MAS may request a detailed explanation. A family office with a lean team of two qualified professionals often supplements spending through external research subscriptions and executive office leases to meet the threshold.

Entity Structure and Application Timeline

The typical 13O architecture involves two Singapore-incorporated private companies: the fund company (exempt private company limited by shares) and the family office management company. The family holding entity, often a trust or an offshore company, owns the fund. A step-by-step timeline from engagement to tax-exempt status spans approximately four to six months:

1. Month 1: Incorporate both entities with ACRA; open a corporate bank account.
2. Month 2: Finalize investment policy statement, constitutional documents, and a three-year business plan.
3. Month 3: Submit MASNET application with a business plan, AUM commitment letter, and details of key professionals.
4. Month 4-5: Respond to MAS queries; complete seed transfer of assets to the fund’s brokerage or custody account.
5. Month 6: Receive in-principle approval and, once conditions precedent are fulfilled, the formal tax-exemption letter.

Applications are processed by the Family Office Development Team, which in 2026 reports an average processing time of 10 weeks for complete submissions.

Compliance and Annual Reporting

Once the tax exemption is granted, the family office must file an annual declaration with the MAS within 15 months of the fund’s financial year-end, confirming continued adherence to AUM, local investments, and TBS thresholds. The declaration must be accompanied by audited financial statements for the fund and a certification from the fund administrator or auditor. The MAS conducts desk-based reviews and may request additional evidence if ratios are borderline. Failure to meet any condition results in the loss of exemption for that year, and income becomes taxable at the prevailing corporate rate of 17%. As of Q1 2026, less than 2% of 13O vehicles have had exemptions revoked, mostly due to misclassification of local investments.

FAQ

Q: Can a family office serve multiple 13O funds? A: No. Each 13O fund must have a dedicated fund manager, though the same family office entity can manage both a 13O and a separate variable capital company (VCC) structure, provided separate books are maintained. In 2026, MAS clarified that a single investment professional may cover up to two 13O funds within the same economic family if the total AUM does not exceed S$100 million and resource allocation is transparent.

Q: What happens if the fund’s AUM falls below S$20 million after approval? A: The exemption is suspended for that financial year unless the decline is due to market movements and the shortfall is cured within six months. In such cases, the fund must notify MAS, show a plan for recapitalisation, and may be subject to tax on income earned during the deficiency period. Historical data show that 8% of 13O funds triggered a temporary loss of exemption due to market downturns in 2025 but regained status by year-end.

Q: Are cryptocurrency assets allowed under 13O? A: Only designated investments qualify. As of 2026, Bitcoin and Ether do not automatically qualify unless the fund trades them via an approved exchange-traded instrument recognised by the MAS. The Income Tax (Exemption of Income of Approved Companies Arising from Funds Managed by Fund Manager in Singapore) Regulations list the specific eligible products. Family offices invested in digital assets should seek a ruling before assuming tax exemption applies.

References

• Monetary Authority of Singapore, Guidelines on Licensing, Registration and Conduct of Business for Fund Management Companies, revised February 2026.
• PwC Singapore, Singapore Family Office Tax Incentive Schemes 2026 – Update on Section 13O and 13U, March 2026.
• EY, Managing Your Family Office in Singapore, 2026 edition.
• Baker McKenzie, Asia-Pacific Wealth Management Review: Singapore’s Evolving FO Landscape, April 2026.
• WongPartnership LLP, MAS Circular on Family Office Tax Incentive Reporting, September 2025.

This article does not constitute legal, tax, or financial advice.