How are asset management fees sourced for California apportionment?

Two regimes, one question

The question in every case is the same: when a manager in one state earns fees from a fund or account whose investors are somewhere else, whose location counts? California answers it under two separate authorities, and the first step in any file is deciding which one applies. The special apportionment regulation, California Code of Regulations, title 18, section 25137-14, is titled "Mutual Fund Service Providers and Asset Management Service Providers," and the second half of that title is doing real work: since the regulation became operative on July 20, 2007, it has carried definitions and sourcing rules for asset management services alongside its rules for services to regulated investment companies, reaching services rendered to funds and accounts that are not regulated investment companies. The threshold question for any manager is therefore whether its services fall within the regulation's defined terms, not whether it happens to service a mutual fund. Services outside the regulation's reach fall under the general market-based sourcing rules for services in Regulation 25136-2, which were amended comprehensively in 2025.

The shareholder ratio, and what else the regulation covers

Regulation 25137-14 has sourced receipts by investor location for many years, and its mechanics preview where the general rule has now arrived. Receipts from services to a regulated investment company are assigned to California based on a shareholder ratio, and the ratio counts shares rather than dollars: the average number of the fund's shares owned by shareholders domiciled in California over the average number of shares owned by shareholders everywhere. The fee follows the money's owners rather than the fund's own commercial domicile or the location where the manager performs the work. A manager with no California office and no California employees can therefore have substantial California receipts solely because California residents hold the funds it services, and the reverse is equally true for a California manager servicing funds held elsewhere. The regulation does not stop at regulated investment companies, and the asset management provisions it has carried since 2007 are what make the pre-2026 analysis a question of scope rather than a question asked into a vacuum.

The open years before 2026

The open-year analysis starts inside Regulation 25137-14 rather than outside it. Because the regulation has defined and sourced asset management services since 2007, the first question for any pre-2026 year is one of scope: did the regulation reach the services this taxpayer rendered, and if it did, its own sourcing rules govern and the general rule never comes into play. Only where the answer is no does the sourcing rule become the general one, under which receipts from services are assigned to California to the extent the purchaser receives the benefit of the service in California. There the contested question was always who the purchaser is, and the Franchise Tax Board's ruling practice answered it one way and then the other, in rulings that never named asset management. Chief Counsel Rulings 2015-03 and 2017-01, issued to a financial data and analytics provider and a health benefits administrator respectively, both sourced service fees to the direct business customer rather than looking through to that customer's own customers. Legal Ruling 2022-01 revoked both and adopted the opposite reasoning: where the direct customer is not the ultimate beneficiary of the service, the benefit is received where the downstream beneficiaries receive it. The ruling's own examples involve an event planner, a pharmacy benefit manager, and a consulting subcontractor; none involves a fund or an investment manager. Its significance for asset management is inferential but hard to miss, because the revoked direct-customer reasoning was the best authority for sourcing fees to the fund, and the look-through logic maps directly onto the manager, fund, and investor structure. Under the FTB's ruling procedures (Franchise Tax Board Notice 2009-08), a revocation applies retroactively to open years for everyone except the taxpayer that obtained the original ruling, and the written-advice reliance relief of Revenue and Taxation Code section 21012 likewise runs only to a taxpayer that obtained a ruling itself, so a manager that filed on direct-customer sourcing without its own ruling holds a defensible filing position rather than protection. The result for open years before 2026 is a narrower dispute than it is sometimes made out to be. The live question is rarely whether California had said anything about asset management, because Regulation 25137-14 had been saying something about it since 2007; the live question is whether the regulation's terms covered the services rendered. Where they did, the regulation's ratio controls and the ruling history is beside the point. Where they did not, the general benefit-of-service rule applies with the revoked direct-customer rulings and the 2022 look-through reasoning pulling in opposite directions, and the answer a taxpayer filed on may be worth defending or worth amending depending on which side of the flow the taxpayer sits.

The rule for 2026 forward

The amendments to Regulation 25136-2, finalized in 2025, standardize investor-location sourcing prospectively and in detail for taxable years beginning on or after January 1, 2026 (Cal. Code Regs., tit. 18, section 25136-2(j)(3)), extending to the general rule an approach the special regulation had already taken. Asset management services, defined as the direct or indirect provision of management, distribution, or administration services to funds, are sourced to each investor's domicile, or to the beneficial owner's domicile where the investor holds title on behalf of someone else. A beneficial owner is a person who made an independent decision to invest; entities such as master funds and feeder funds are looked through rather than treated as the investor, and participants in a defined benefit plan are not treated as the beneficial owners of the plan's assets. Domicile is presumed to be the billing address in the taxpayer's records, or for a beneficial owner the billing address in the records of the fund or the asset manager, and the presumption does not apply where the taxpayer has actual knowledge that an investor's principal place of business is elsewhere, or where the fund or the asset manager has actual knowledge that a beneficial owner's primary residence or principal place of business is elsewhere (Cal. Code Regs., tit. 18, section 25136-2(c)(2)). Receipts are then assigned in proportion to the average value of the interests held by California-domiciled investors or beneficial owners, with reasonable estimation permitted where exact average values are not available. The value-based allocation deserves attention in fee modeling: it assigns receipts by the investors' shares of asset value, not by the fees those investors bear, so discounted fee arrangements for particular investors do not reduce the California percentage the way an actual-fee allocation would.

What the sourcing answer sets in motion

Investor-domicile sourcing does more than move numbers within an apportionment schedule. California receipts drive the doing business tests of Revenue and Taxation Code Section 23101(b), so a manager with no California presence can be pulled into a filing obligation solely by the domicile of its investors, and the same receipts feed the market-based rules that assign a nonresident's distributive share. The interaction with the water's edge rules is its own subject, because the inclusion tests for a foreign corporation are built on federal concepts rather than California sourcing, and the two systems can classify the same fee stream differently. And the effective date does not close the earlier years, though it narrows what is in dispute. The amendments speak from 2026, the Franchise Tax Board may contend that the look-through approach merely states what the prior general rule already required, and taxpayers with the opposite interest will contend that a rule adopted for 2026 is evidence the prior rule said something else. That exchange matters only for services the special regulation did not reach, which is why the scope question under Regulation 25137-14 is the first thing an open-year file should settle.

Practice notes

Three files are worth building now. First, the investor domicile data: the 2026 rule is administrable only with investor-level records, the billing address presumption rewards taxpayers whose books contain the addresses, and estimation is a fallback rather than a plan. Second, the open-year position, which begins with scope rather than with the rulings: a manager should establish whether Regulation 25137-14 reached the services it provided in each open year, and only then, for the years and services the regulation did not reach, weigh whether sourcing to the direct customer or looking through to the fund's investors leaves exposure or a refund claim as the larger number. Third, consistency across regimes: the shareholder ratio of Regulation 25137-14, counted in shares rather than in value, the new investor look-through, assigned by the average value of the interests held, and the doing business thresholds each use investor location in slightly different ways, and a return that sources one fee stream by investor domicile while ignoring investor domicile for the nexus analysis invites the examination it could have avoided. G&G State Tax Group provides receipts sourcing analysis for asset managers and fund sponsors alongside its state and local tax practice.