The cheapest AUM is the account nobody asked to manage

When SEI asked 302 high-net-worth investors earlier this year whether their advisor had ever proposed managing a larger share of the household's assets, 71% said no. That answer sits awkwardly beside the advisor half of the same research: of 518 advisors surveyed in January, 95% say they try to consolidate all client assets into a single account, and the average advisor rated the importance of doing so an 8 on a scale of 10. Intent is close to universal on paper. Only 7% of those advisors manage 100% of their clients' assets, while 88% of the investors say their primary advisor does not manage everything they own — two numbers describing one shortfall from opposite sides of the table.

Advisors have an explanation, and SEI's own data complicates it: the obstacle cited most often, by 37%, is a lack of client interest or need, but among investors who keep assets outside the primary relationship, 63% already know that managing a household portfolio in one place can save them money on taxes. Clients who grasp the tax case and have still never been asked are not withholding demand; they are waiting on a question that hasn't come. Arthur Worthington, SEI's senior managing director of strategic business development and integration, lands on the same point: advisors need to ask explicitly, name the problems they can solve, and state plainly what household management is worth.

The other obstacles advisors report are real, and they are about doing the work: 30% point to missing technology that would automate it, 22% to insufficient staffing, and 20% to the client-service time it consumes. The workarounds show up in the survey too, with 40% of advisors still completing multi-account tax harvesting by hand and those who do run household portfolios reporting their monthly time cost in the tens of hours.

At households under $100 million, running the balance sheet as one book costs an advisor 37 hours a month; above $500 million, it costs 65. Read the top of that range and the practice implication is that the biggest households absorb the most labor, but read the bottom and it says something less comfortable — a full work week a month against a book of sub-$100 million households is a cost a firm can see, model, and price, which is more than can be said for the cost of the next recruited team.

Most firms reading this survey will buy the automation first, because a purchase order is easier to sign than a change in what advisors say in meetings, but that ordering has it backwards. The platform exists to execute a request nobody is making yet, and the information a firm needs to specify that platform — which households hold outside assets, where those assets sit, what the client's own reason for keeping them there is — arrives only after the asking starts. Put the ask into this quarter's review process and the automation requirement writes itself; buy the platform first and the firm has paid for capacity it has no pipeline to fill.

Compare every other route to a new dollar of AUM: the contest for advisor talent now runs through block trades and employee-channel retention, and both acquisitions and recruiting packages put a price on growth, while a consolidation program carries no bid. The assets are already in the household, the tax rationale is already understood by 63% of the clients holding them elsewhere, and the marginal account costs a conversation inside a relationship the firm is already servicing. An industry that pays for books while leaving expansion to an unmade request has chosen the expensive channel.

There is a defensive case here that the obstacle rankings conceal: a household holding part of its balance sheet with another firm is a household another firm can see, and the primary advisor's view of the events that move money — a business sale, an inheritance, a retirement — is partial at best. Nothing in the SEI surveys tracks how many partially managed households eventually leave, so the size of that exposure is unmeasured. But a client who understands the tax case for consolidating and has never been asked is a client whose outside assets are an open invitation to somebody else.

One caveat attaches to provenance: SEI sells into this market, with platform work in the RIA space running through roll-ups and the twelfth deal in Stratos Wealth's SEI era adding a $400 million Illinois partner in August, as this publication reported, so a survey that finds advisors leaving wallet share on the table is also a sales document. The samples are modest besides: 518 advisors and 302 investors, self-reported. What the research has going for it is corroboration from both sides, with 7% of advisors and 88% of investors describing the same shortfall from opposite ends.

AI is migrating out of the back office and into the client meeting, where the plan becomes a byproduct and the fee has to be defended on judgment. SEI's numbers suggest the industry has skipped a step: four in ten advisors still finish multi-account tax harvesting by hand, three in ten say the automation they need does not exist, and product roadmaps have moved on to meeting assistants while household-level execution sits unfinished. The ask costs nothing this quarter. Watch the 7%. If SEI runs the survey again and it reads double digits, the wallet-share review will have moved out of the advisor's discretion and into the platform's standard workflow.