Choosing Between Justworks and TriNet for an Architecture Firm

A studio's revenue often concentrates around specific project milestones, schematic design, design development, construction documents, rather than arriving as steady monthly cash flow, even though payroll runs every two weeks regardless of what phase your active projects are in. Justworks' flat per-employee fee is easy to plan against that mismatch, since it doesn't move with your billing cycle the way a percentage-of-payroll fee more naturally reflects revenue swings that a project-based business doesn't actually have month to month.

A studio between major milestones, waiting on a client approval before the next phase can be invoiced, still has to make payroll on schedule regardless of where that invoice stands. Treating your PEO cost as a fixed, predictable line item makes that gap easier to plan cash flow around than a fee that could move against you at the worst possible moment.

A design error that leads to a construction defect claim is a professional liability matter, covered by your firm's errors and omissions insurance, not by anything a PEO provides. Employment practices liability insurance, which both vendors include, covers a different category entirely: claims from your own employees. TriNet's EPLI comes with higher limits and dedicated defense counsel; Justworks includes standard coverage through a centralized support model. Keep these two kinds of liability clearly separated in how you think about coverage, since conflating them can leave a real gap uncovered.

A studio's unlicensed designers and drafters are often earlier in their careers and more price-sensitive on benefits, while licensed architects, especially principals, expect a more complete package. Justworks' pooled national health plans give a small studio access to competitive rates for the broader team. TriNet's deeper customization can help you offer a genuinely differentiated package to senior licensed staff without overpaying for the same tier across the whole studio.

This matters more the closer a junior designer gets to sitting for licensure, since that's often the point where a competing firm makes a play for them with a more senior title and a richer package attached. A studio that waits until someone's already fielding an outside offer to improve their benefits has usually waited too long.

An architect licensed in one state typically needs reciprocal licensure to stamp drawings for a project in another state, a state licensing board matter that has nothing to do with your PEO. What the PEO does affect is payroll administration once staff are working on out-of-state projects long enough to trigger state tax or unemployment insurance registration, which both vendors can handle, though it's worth asking each how quickly a new state gets added once a project genuinely calls for it.

Architecture and design firms run payroll as a large share of revenue, consistent with professional services generally¹, since design talent is the product. That makes it worth running your actual comp mix, licensed principals against junior designers, through both vendors' pricing models rather than assuming either one is automatically cheaper for a studio your particular size and staffing structure.

• If project billing swings are significant, ask each vendor how its pricing behaves as headcount and payroll change, so payroll-cost volatility doesn't stack on top of revenue volatility.
• If you're actively trying to retain senior licensed architects against bigger-firm offers, get a TriNet quote and compare benefits depth.
• Confirm EPLI and your professional liability coverage are both current and understood as separate policies.
• Ask both vendors how quickly they register a new state once a project takes staff there for an extended stretch.
• Revisit the decision as the studio grows past its first ten or fifteen employees rather than assuming the original choice still fits.