Mercury vs Relay for an RIA's Own Operating Account

Most RIAs collect advisory fees quarterly, either in advance or in arrears, which means the firm's own cash position swings on a predictable quarterly rhythm rather than staying flat month to month. A dedicated operating reserve, sized to smooth that quarterly swing so payroll never depends on a fee collection landing exactly on schedule, is the single most useful account-structure decision a small RIA can make. Relay's free sub-accounts handle this cleanly: route AUM fee collections into an operating account, and hold a separate smoothing reserve that releases to cover expenses evenly across the quarter rather than in one lump after fees land.

Set up the quarterly smoothing reserve in this order:

1. Route AUM fee collections into an operating account, separate from the reserve.
2. Hold a separate smoothing reserve sized to cover roughly one quarter of typical operating expenses, adjusted for whether fees are collected in advance or arrears.
3. Release money from the reserve to cover expenses evenly across the quarter, rather than in one lump after fees land.
4. Revisit the reserve size as assets under management and headcount grow.

RIAs sometimes operate more than one legal entity, a separate entity for a wealth management arm versus an institutional consulting arm, or a holding company structure from an acquisition. Mercury's multi-entity account architecture and its API suit a firm in that position better than Relay's structure does, particularly if the firm has any internal operations staff who'd build reporting that pulls balances across entities automatically rather than checking each account by hand.

A firm that grew through acquiring a smaller advisory practice often inherits exactly this kind of multi-entity complexity without having planned for it. Rather than forcing an acquired practice's operating cash into the parent firm's existing account structure immediately, many firms keep the acquired entity's accounts separate for a transition period, long enough to fully understand its cash patterns, then consolidate deliberately once that picture is clear.

A firm carrying a healthy operating reserve to smooth quarterly fee timing is holding cash that should be earning something while it waits. Yield on that reserve is real money at today's rates: the effective federal funds rate is 3.63%¹, and Mercury's automated Treasury sweep is built to capture something near that on operating cash sitting above your working buffer, a reasonable fit for a reserve that's genuinely idle for stretches of the quarter. This applies strictly to the firm's own operating reserve, never to client assets, which sit with your custodian under entirely separate rules.

An RIA investing ahead of AUM growth, hiring an advisor or opening a new location before the fee revenue to support it has fully materialized, sometimes needs a credit line to bridge the gap. That credit is priced off the bank prime rate, currently 6.75%², so weigh the real cost of carrying that debt against how confident the firm actually is in the AUM growth it's hiring against, since a slower-than-expected asset gathering pace makes an aggressive hiring plan considerably more expensive to sustain.

Most RIAs of this size rely on an outside CPA or bookkeeper rather than in-house finance staff, which makes role-based account access genuinely useful rather than a nice-to-have. Relay's native QuickBooks Online and Xero integrations, paired with limited access for that outside accountant, keep operating books current without sharing full login credentials. Mercury supports similar access controls and layers in a documented API for a firm with internal technical staff who want operating data flowing into their own reporting.

Before applying, confirm with your compliance counsel exactly which of your firm's cash flows are pure operating funds versus anything that could be construed as touching client assets, since the answer shapes how conservatively you should treat account structure. Ask your outside CPA which platform's export format they already work with regularly. And if your firm runs more than one entity, map out now which entity each expected cash flow, fees, payroll, vendor payments, belongs to, so the account structure you choose from day one matches your actual legal structure instead of needing to be rebuilt once a compliance review asks for it.

Most RIAs already run a periodic compliance review covering custody, disclosure and recordkeeping. Add operating account structure to that same review rather than treating it as a one-time setup decision: confirm the smoothing reserve is still sized correctly against current AUM and headcount, confirm entity mapping still matches the firm's actual legal structure if anything has changed, and confirm bookkeeping access hasn't been left open for someone who no longer needs it. Folding this into an existing review cycle costs little extra time and catches drift before it becomes a real problem.