How a Law Firm Should Weigh Justworks and TriNet

Employment practices liability insurance, which both PEOs include, covers claims from your own employees: discrimination, wrongful termination, harassment. It has nothing to do with legal malpractice claims from clients, which stay covered by your firm's separate professional liability policy regardless of which PEO you use. TriNet bundles EPLI with higher coverage limits and access to pre-aligned defense counsel experienced in employment litigation specifically. Justworks includes standard EPLI coverage too, through a more centralized, self-service support model.

Attorneys are almost always exempt under wage-and-hour law given the nature of their work, while paralegals and administrative staff are frequently non-exempt and owed overtime for hours worked past forty in a week. Getting that classification wrong, sometimes firms misclassify a paralegal as exempt because the role feels professional, is a real wage claim risk that exists independent of which PEO runs payroll. Both vendors calculate overtime correctly once the classification is set; neither one will catch a wrong classification for you.

This is worth a periodic review rather than a one-time decision at hiring, since a paralegal's actual duties can shift over time, taking on more independent judgment and discretion, in ways that change the underlying exemption analysis even without a formal title change.

Law firms carry payroll costs that make up a substantial share of revenue for a professional services business this size¹, driven by attorney compensation that scales with experience and book of business. A percentage-of-payroll PEO fee moves meaningfully with that comp structure, so a firm with a few high-billing senior partners on staff, versus mostly associates, will see very different numbers between TriNet's typical pricing model and Justworks' flat per-employee rate.

A PEO's role is limited to employment data, payroll, benefits enrollment, tax forms, not client matter information, which never touches the PEO relationship at all. That said, firms handling sensitive client work sometimes want extra assurance about how an HR vendor handles employee data. TriNet's dedicated HR contact model gives firms a named person to ask about data handling practices directly. Justworks' security and privacy documentation is available through standard channels rather than a named relationship.

If your firm does government contract work or handles matters with strict confidentiality obligations, it's worth asking each vendor directly, in writing, what data it collects about your staff and how long it retains that data after the relationship ends, rather than assuming standard PEO practices meet whatever obligations your engagement letters or protective orders impose.

• Confirm attorney, paralegal, and support staff classifications are documented correctly before switching PEOs, not after.
• Ask each vendor to walk through how EPLI differs from your firm's malpractice coverage, in writing.
• Model both fee structures against your actual partner-to-associate compensation spread.
• If your firm handles especially sensitive client matters, ask whether a named HR contact matters enough to you to justify TriNet's typical premium over Justworks.

A two- or three-partner practice with a small support staff usually finds Justworks' flat pricing and self-serve tools sufficient, since the employment questions that come up are infrequent and rarely complex. A firm with multiple offices, a larger associate class, and a support staff spread across paralegals, legal assistants, and administrative roles tends to run into more frequent classification and benefits-design questions, which is where TriNet's assigned HR contact starts to earn its higher cost. Revisit the decision as the partnership grows rather than assuming the original choice still fits a firm twice the size.