13U for structures: master-feeder, SPVs, and the single-entity test

The short answer

The 13U scheme is unusual among Singapore's fund tax incentives in that it does not attach to one legal vehicle — it attaches to a structure. Under §2.5 of MAS Circular FDD Cir 05/2026, a 13U award can sit on a standalone fund vehicle, or on a whole family of entities: a master-feeder fund structure, a master-feeder fund structure that holds investments through SPVs, or a master fund that holds investments through SPVs. A structure with multiple entities can submit one consolidated application, and since 1 January 2025 the whole point of that consolidation has been formalised: the S$50 million AUM in designated investments ("AUM in DI") condition and the tiered local business spending ("LBS") condition apply once, at the structure level, regardless of how many feeder funds or SPVs sit inside it.

The four eligible 13U structures

Standalone fund vehicles, and both master funds and feeder funds within a master-feeder structure, are permitted to be constituted in all forms — the circular does not confine them to Singapore-incorporated companies. A feeder fund is any investment vehicle, whether or not a legal entity, that invests substantially and directly through a single master fund; a master fund is the vehicle through which investors access one or more underlying investments managed by the fund manager. Where SPVs enter the picture — a master-feeder fund-SPV structure, or a master fund-SPV structure — the master fund itself must be a company, trust or limited partnership incorporated, constituted or registered in Singapore and regarded as a Singapore tax resident for each basis period. Feeder funds, if any, remain permitted in all forms, and so are the SPVs, which may be partially or wholly owned by the master fund. There is no restriction on the number of SPV tiers a master fund can have, and co-investors are allowed in an SPV provided they are already-incentivised funds (13D, 13O, 13OA, 13U or 13V) or qualifying foreign investors.

Since 2025: one structure, one test

Before the change, MAS's practice risked penalising exactly the structures managers use to segregate risk — adding an SPV to ring-fence one asset class could, in principle, drag in extra AUM or LBS scrutiny for that vehicle alone. Section 5.3 of the circular confirms the fix: "there is no longer a requirement for the S13U structure to meet additional AUM in DI and LBS conditions for each additional SPV or trading feeder fund." The circular's own worked example makes it concrete: an S13U master fund-SPV structure comprising one master fund and two SPVs, with AUM in DI of S$100 million, is required to incur a minimum LBS of S$200,000 collectively as a structure in a basis period — not S$200,000 for the master fund and a further tiered figure for each SPV — in order for every entity in the structure to avail itself of the tax exemption for the corresponding year. It is tested exactly as a single standalone fund would be.

Adding or removing an SPV

The single-entity treatment does not mean a structure can grow without checking back in with MAS. Any addition of a feeder fund or SPV to an approved structure must be approved by MAS, and at the point of that application the structure must meet the S$50 million AUM in DI condition collectively — continuing the example above, if the structure wished to add a third SPV, it would need to meet S$50 million as a three-SPV structure at that application, after which it continues to be tested as a single standalone fund regardless of the new count. Before the addition is approved, the existing structure may continue to enjoy its existing award; once approved, the new, larger structure is assessed under the award granted to it. Removing a feeder fund or SPV runs the other way: the fund structure must update MAS, but there is no AUM in DI condition to re-test on removal — including where an SPV is removed because it no longer meets its own conditions.

The Capital Deployment Requirement: an SFO-track condition, met collectively

One nuance worth separating clearly: the Capital Deployment Requirement ("CDR") is a condition on S13U single family office ("SFO") funds, not on the ordinary non-SFO structures this article otherwise covers. Where it applies, the circular extends the same single-entity logic to it — an S13U SFO fund structure is required to meet the CDR "as though the entire structure is a single fund entity," and is regarded as having met it for a year if the approved entities within the structure collectively invest at least the lower of 10% of the structure's total AUM in DI or S$10 million in specified investments. A standard non-SFO master-feeder-SPV structure of the kind most managers run does not carry a CDR condition at all — it is worth not conflating the two tracks.

13U's flexibility versus 13O: no straitjacket, no 30/50 rule

The structural flexibility is the sharpest contrast with 13O and 13OA. An S13O fund must be a company incorporated and resident in Singapore; an S13OA fund must be a limited partnership registered in Singapore. Neither accommodates a foreign feeder, an offshore SPV tier, or a structure spanning multiple legal forms without stepping outside the scheme entirely. 13U carries no such straitjacket for its standalone vehicles and feeder funds, which is precisely why cross-border managers running master-feeder arrangements gravitate to it. 13U also does not carry the 30/50 rule that applies to 13O/13OA — the investor-concentration test capping how much of a fund a single non-qualifying resident non-individual investor may hold. That test is specific to the 13O and 13OA schemes; it has no equivalent in 13U.

What this means for a manager weighing structures

For a manager running genuinely cross-border capital — a Cayman or BVI feeder alongside a Singapore master, or a chain of SPVs isolating different asset classes — 13U is built for exactly that shape, and the 2025 changes removed the main friction that previously made adding SPVs feel like it multiplied compliance burden. The trade-off is the higher entry bar: S$50 million in AUM in DI for the whole structure, against S$5 million for a standalone 13O company. Where a manager's assets and investor base sit comfortably above that threshold and the fund genuinely needs multiple vehicles, 13U's single-entity test is a meaningful simplification, not just a bigger number to hit.