Mercury vs Relay: Banking for a Staffing or Search Agency

Before setting up any account structure, calculate your actual exposure: weekly contractor payroll across all active placements, multiplied by your average client collection period in weeks. That number is roughly how much working capital your agency needs to fund at any given time, and it's usually larger than founders expect once a staffing book grows past a handful of placements. Run this calculation quarterly as your placement volume changes, since a growing book of business increases the dollar size of this gap even when nothing else about the agency's operations has changed.

Calculate the exposure in these steps:

1. Add up the weekly contractor payroll across all of your active placements.
2. Multiply that total by your average client collection period, measured in weeks.
3. Treat the result as roughly the working capital the agency needs to fund at any given time.
4. Recalculate every quarter, and again after signing any placement large enough to change your weekly payroll exposure.

Relay's free sub-accounts are well suited to this: open a dedicated account funded specifically to cover contractor payroll, sized against the gap calculated above, and treat it as untouchable for anything else. That separation matters because it's the single clearest early warning sign of a staffing agency in trouble: when the payroll funding account starts running thin relative to active placements, that's the signal to slow new placements or address collections before the situation worsens, not something to notice only when a payroll run actually comes up short. Mercury supports the same dedicated-account discipline, with the added option of pulling real-time balances through its API into a staffing software platform that's already tracking placement and timesheet data.

Once the gap is sized, decide how much of it your agency will cover from its own reserve versus a credit line or factoring arrangement. Financing costs money: a credit line is priced off the bank prime rate, currently 6.75%¹, and factoring arrangements typically cost more than a straight credit line in exchange for taking on the collection risk directly. An agency with strong, diversified client relationships and reliable collections can often self-fund more of the gap from its own reserve and finance less; an agency with concentrated exposure to a few slow-paying clients may find factoring worth the extra cost simply for the certainty it buys.

Whichever mix you choose, write it down as an actual policy: what share of the payroll funding gap comes from the firm's own reserve, what share sits on a credit line, and at what reserve level the agency shifts from self-funding toward drawing on financing. An agency making that call fresh every time cash gets tight tends to reach for credit later than it should, after a payroll run is already at risk, instead of drawing on a plan set calmly in advance.

Any cash your agency holds beyond what's needed to fund the payroll gap is worth earning yield on rather than leaving idle. With the effective federal funds rate running at 3.63%², automating a Treasury sweep on cash above your working buffer, the way Mercury does, turns an idle reserve into real yield instead of a flat balance earning nothing. Set the sweep threshold above your calculated payroll funding need, not below it, so the account never sweeps away cash you actually need available for this week's contractor payments.

An agency running dedicated staffing or ATS software that already tracks placements, timesheets and client billing gets real value from Mercury's API, pulling bank balances directly into that system so a recruiter or ops lead can see funding status without switching tools. An agency running placements out of a spreadsheet and general accounting software is usually better served starting with Relay, whose native QuickBooks Online and Xero integrations plus role-based bookkeeper access cover the need without requiring anyone to build a custom integration.

The clearest early sign of a staffing agency outgrowing its own funding is winning a placement large enough that a single client's payroll obligation meaningfully changes the firm's total exposure. A ten-person placement at one client can double an agency's weekly payroll funding need overnight, and an agency that doesn't recalculate its gap before staffing up for that win is the one most likely to discover a shortfall mid-cycle. Treat any placement above roughly a quarter of your current total exposure as a trigger to redo the math before signing, not after the team is already staffed and the first payroll run is due.