Architecture firms carry a particular HR burden that most PEO sales conversations aren’t built to address. You’re managing licensed professionals whose credentials span multiple states, project-based staffing cycles that can swing headcount significantly from quarter to quarter, and workers’ comp classifications that look very different for a principal at a drafting station versus a project architect doing field observation at a construction site. Getting any of those wrong costs money and creates compliance exposure.
A professional employer organization can take payroll, benefits, and compliance administration off your plate through a co-employment arrangement, but the right PEO for a 12-person architecture studio isn’t necessarily the same as the right PEO for a 60-person multidisciplinary firm. The providers below represent a range of approaches worth evaluating. This is informational guidance, not individualized legal, tax, or benefits advice. PEO Metrics may receive vendor placement fees from some providers featured here.
1. PEO Metrics
Best for: Architecture firms that want to compare multiple PEO providers before committing to one.
PEO Metrics is a PEO comparison service that helps architecture firms evaluate multiple providers side by side rather than relying on a single vendor’s sales pitch.
Where This Tool Shines
Most PEO buying decisions happen after a handful of demos and a lot of vendor-supplied materials. PEO Metrics exists to change that dynamic. Instead of evaluating each provider in isolation, you get a structured comparison across criteria that actually matter to professional services firms: pricing transparency, benefits quality, workers’ comp handling, multi-state compliance capability, and contract flexibility.
For architecture firms specifically, the ability to assess how each PEO handles mixed workforce classifications, from studio roles to field observation duties, is worth the time investment before signing anything. The platform also helps firms identify where they may be overpaying due to bundled fees or administrative markups that aren’t immediately obvious in a standard quote.
Key Features
Side-by-Side Provider Comparisons: Evaluate multiple PEO candidates using architecture-relevant criteria rather than generic HR metrics.
Pricing Analysis: Helps firms identify where bundled fees or administrative markups may be inflating costs.
Unbiased Multi-Vendor Guidance: Covers a range of PEO candidates rather than steering toward a single provider.
Data-Driven Evaluation Framework: Structured for professional services firms where workforce complexity and compliance exposure are real considerations.
Best For
Architecture firms at any stage of PEO evaluation, whether you’re selecting a PEO for the first time, approaching a renewal, or questioning whether your current provider is still the right fit. Particularly useful for firms that don’t have dedicated HR staff to vet multiple vendors independently.
Pricing
Contact PEO Metrics directly for service details. Note that PEO Metrics may receive vendor placement fees from some providers in its comparison network.
2. Insperity
Best for: Mid-size architecture firms competing for licensed talent and needing dedicated HR support.
Insperity is one of the largest PEOs in the U.S., built around a dedicated HR specialist model and a broad benefits portfolio.
Where This Tool Shines
Insperity’s structure is meaningfully different from providers that route every question through a call center. Clients are assigned dedicated HR specialists, which matters when you’re dealing with something nuanced, like how to classify an architect who splits time between studio work and construction administration site visits. That kind of role-specific question benefits from a consistent point of contact who knows your firm.
The company’s large pooled employee base can also translate to stronger benefits access, which is a genuine recruiting consideration when you’re competing against engineering and construction firms for the same licensed talent pool. Insperity is a NAPEO member with a long operating history, which provides some baseline confidence in organizational stability.
Key Features
Dedicated HR Specialist Model: Firms work with assigned specialists rather than rotating call-center staff.
Benefits Access: Large pooled employer base that may improve access to health, dental, and retirement options.
Payroll and Compliance Services: Covers payroll processing, tax administration, and regulatory compliance.
Risk Management: Workers’ comp and employer practices liability support included in the service model.
Best For
Architecture firms with enough headcount to meet Insperity’s minimum employee requirements and a priority on benefits quality and dedicated HR support. Verify current minimums directly with Insperity before requesting a quote.
Pricing
Not published publicly. Request a quote directly from Insperity. Confirm minimum employee requirements before proceeding.
3. TriNet
Best for: Architecture firms with staff or active projects in multiple states.
TriNet is a publicly traded PEO (NYSE: TNET) that positions itself around industry-specific HR expertise and multi-state compliance infrastructure.
Where This Tool Shines
Multi-state compliance is one of the more painful administrative realities for growing architecture firms. When your firm has a principal licensed in California, project managers in Texas, and a construction administration team working a job in New York, you’re dealing with three different sets of payroll tax obligations, labor law requirements, and potentially different workers’ comp classifications. TriNet’s compliance infrastructure is designed to handle that kind of geographic complexity.
TriNet also organizes its HR support teams by industry segment rather than treating all clients identically, which can mean more relevant guidance for professional services contexts. That said, architecture is a specific niche within professional services, so it’s worth asking directly how familiar their team is with AEC workforce structures.
Key Features
Multi-State Payroll and Tax Administration: Handles payroll tax filings and compliance across multiple state jurisdictions.
Industry-Segmented HR Support: Support teams organized by industry vertical rather than a generalist pool.
Benefits Administration: Access to health and benefits carriers through TriNet’s pooled employer network.
Employee Self-Service Platform: Technology interface for employee access to pay stubs, benefits enrollment, and HR documentation.
Best For
Architecture firms with multi-state operations or project footprints that create payroll and compliance obligations across jurisdictions. Verify minimum employee counts and contract terms directly with TriNet.
Pricing
Not published publicly. Request a quote directly from TriNet. Confirm minimum employee requirements and contract flexibility before signing.
4. ADP TotalSource
Best for: Architecture firms already operating within the ADP technology ecosystem.
ADP TotalSource is ADP’s full-service PEO division, holding CPEO certification (verify current status at irs.gov/cpeo), with a nationwide footprint and deep integration into ADP’s broader platform.
Where This Tool Shines
CPEO certification matters for architecture firms with significant payroll because it affects how federal employment tax liability transfers under the co-employment arrangement. Certified Professional Employer Organizations have met IRS standards that uncertified PEOs have not, and the IRS maintains a current list you can check directly. TotalSource’s CPEO status, combined with ADP’s scale and compliance infrastructure, makes it a credible option for firms that prioritize regulatory standing.
The integration angle is also practical. If your firm is already running payroll, time tracking, or HR administration through ADP products, TotalSource can reduce the friction of adding PEO services. Switching platforms mid-growth creates transition risk; staying within a familiar ecosystem avoids that.
Key Features
CPEO Certification: Verify current status independently at irs.gov/cpeo before making decisions based on this designation.
ADP Ecosystem Integration: Connects with ADP’s payroll, time, and HR technology stack for firms already on those systems.
Nationwide Compliance Support: Multi-state payroll tax and labor law administration across ADP’s established infrastructure.
Workers’ Comp and Risk Management: Risk management services included within the PEO co-employment arrangement.
Best For
Architecture firms already using ADP products, or firms that place significant weight on CPEO certification status and want a provider with a long track record and national scale.
Pricing
Not published publicly. Request a quote directly from ADP TotalSource.
5. Oasis (a Paychex Company)
Best for: Smaller architecture firms looking for PEO services backed by an established payroll infrastructure.
Oasis is Paychex’s PEO offering, combining Paychex’s payroll technology with co-employment services generally positioned toward smaller employer segments.
Where This Tool Shines
Boutique architecture studios, often ranging from five to fifteen people, sometimes struggle to qualify for PEO services at the larger providers or find that enterprise-tier features aren’t worth the cost. Oasis is generally positioned toward that smaller segment, backed by Paychex’s established payroll infrastructure and publicly traded stability (NASDAQ: PAYX).
For a small firm that needs payroll accuracy, basic benefits access, and compliance support without the complexity of a large-enterprise PEO relationship, Oasis represents a practical middle path. The Paychex backing also means the underlying payroll technology is mature, which reduces the risk of processing errors that can create real problems with licensed employees who depend on accurate pay.
Key Features
Paychex Payroll Infrastructure: Backed by Paychex’s established payroll processing technology and compliance systems.
Benefits Access: Health and retirement benefits access through a pooled employer arrangement.
HR Administration and Compliance Support: Standard PEO co-employment services including HR guidance and regulatory compliance.
Accessible Entry Point: Generally suited to smaller headcounts where enterprise PEO minimums may be a barrier.
Best For
Small architecture studios that need reliable payroll and basic PEO services without enterprise-tier complexity. Confirm current minimum employee requirements directly with Paychex/Oasis before proceeding.
Pricing
Not published publicly. Request a quote directly from Paychex/Oasis. Confirm current minimum employee requirements at the time of inquiry.
6. Engage PEO
Best for: Architecture firms with complex multi-jurisdictional compliance exposure or project-site labor law obligations.
Engage PEO is a privately held PEO differentiated by an attorney-led HR compliance team, with a focus on multi-state employment law guidance.
Where This Tool Shines
Most PEOs staff their HR compliance function with HR generalists. Engage PEO’s attorney-led model means that when a question arises about how a particular state’s wage and hour law applies to your project architect doing construction administration in a jurisdiction your firm hasn’t worked in before, the guidance is coming from someone with legal training rather than a generalist reading a policy manual.
For architecture firms that regularly work across state lines, that distinction can matter. Construction administration roles in particular can create ambiguity around classification, overtime eligibility, and site-specific labor requirements. Engage PEO is a NAPEO member, and its compliance-focused positioning makes it worth evaluating if your firm’s primary PEO concern is legal and regulatory exposure rather than technology features.
Key Features
Attorney-Led HR Compliance Team: Compliance guidance delivered by legal professionals rather than generalist HR staff.
Multi-State Employment Law Guidance: Structured to support firms with employees and project obligations across multiple jurisdictions.
Payroll and Benefits Administration: Standard PEO co-employment services including payroll processing and benefits access.
NAPEO Membership: Member of the National Association of Professional Employer Organizations.
Best For
Architecture firms where compliance complexity is the primary driver of the PEO decision, particularly those with regular multi-state project work or field observation obligations. Verify current service footprint and minimum requirements directly with Engage PEO.
Pricing
Not published publicly. Request a quote directly from Engage PEO. Confirm current service footprint and minimum requirements at the time of inquiry.
7. Justworks
Best for: Small architecture studios that want predictable monthly costs and a modern self-service HR interface.
Justworks is a PEO known for a transparent per-employee pricing model and a self-service platform suited to smaller teams.
Where This Tool Shines
One of the persistent frustrations with PEO pricing is that it’s almost never transparent upfront. Justworks has historically published its pricing directly on its website, which makes budgeting conversations with firm principals significantly easier. For a small architecture studio where the owner is also functioning as the de facto HR department, knowing what you’ll pay per employee per month before getting on a sales call is genuinely useful.
The self-service platform orientation also fits smaller teams well. When you have ten employees who are comfortable managing their own benefits enrollment, PTO requests, and pay stub access through a clean interface, you don’t need a dedicated HR portal built for enterprise complexity. Justworks is worth considering if your firm’s priorities are cost predictability and ease of administration over specialized compliance depth.
Key Features
Published Per-Employee Pricing: Justworks has historically published pricing on its website; verify current rates directly at justworks.com before making any budget assumptions.
Self-Service Employee Platform: Clean interface for employee-managed benefits enrollment, pay access, and HR documentation.
Benefits Administration: Health, dental, and retirement options available through the PEO co-employment arrangement.
Straightforward Onboarding: Designed for smaller teams that need a quick, low-friction setup process.
Best For
Small architecture studios, typically under 25 employees, where cost predictability and platform simplicity matter more than deep compliance specialization or dedicated HR specialist access.
Pricing
Justworks has historically published pricing on its website. Verify current rates directly at justworks.com before citing any figure in internal planning documents.
8. Rippling PEO
Best for: Architecture firms with hybrid or remote design teams where onboarding speed and software access management are priorities.
Rippling PEO is a co-employment service layer within Rippling’s unified HR, payroll, and IT management platform, suited to firms where people operations and technology management overlap.
Where This Tool Shines
Rippling’s core differentiator isn’t the PEO itself; it’s the single employee record that connects HR, payroll, and IT management in one system. When you onboard a new project architect, Rippling can provision their laptop, set up their software access to AutoCAD, Revit, or whatever your firm’s design stack includes, and enroll them in benefits from the same workflow. For architecture firms that have moved toward distributed or hybrid teams, that kind of integrated onboarding reduces the administrative scatter that typically happens across multiple systems.
The platform orientation does mean Rippling is a better fit for firms that are comfortable with software-driven HR management than for those that want a hands-on HR specialist relationship. If your primary need is compliance guidance from a human expert, other providers on this list may serve you better. If operational efficiency and onboarding speed for a distributed team are the priority, Rippling’s approach is worth a closer look.
Key Features
Unified Employee Record: Single record connecting HR, payroll, and IT management across the employee lifecycle.
Automated Onboarding with Device and App Provisioning: Onboarding workflows that can include software access and device setup alongside HR enrollment.
PEO Co-Employment Services: Standard co-employment arrangement covering payroll, benefits, and compliance within the broader Rippling platform.
Distributed Team Support: Designed to work well for firms with remote or hybrid staff across multiple locations.
Best For
Architecture firms with distributed or hybrid design teams where onboarding efficiency and software access management are genuine operational priorities. Verify current PEO service scope and minimum requirements directly with Rippling.
Pricing
Not published publicly. Request a quote directly from Rippling. Confirm current PEO service scope and minimum employee requirements at the time of inquiry.
Choosing the Right Fit for Your Firm
No single provider on this list is the right answer for every architecture firm. The right PEO depends on your headcount, your geographic footprint, how complex your workers’ comp classifications are, and whether your primary concern is compliance depth, benefits quality, cost predictability, or platform integration.
A few rough patterns worth noting. If your firm has staff across multiple states and compliance exposure is your main concern, Engage PEO’s attorney-led model or TriNet’s multi-state infrastructure deserve serious attention. If you’re a smaller studio that needs straightforward pricing and a clean platform, Justworks is worth evaluating. If you’re already in the ADP ecosystem or want CPEO certification to be part of the equation, ADP TotalSource is the logical starting point. And if your team is distributed with significant onboarding volume, Rippling’s integrated approach may reduce administrative overhead in ways the others can’t match.
The challenge with any of these evaluations is that you’re comparing providers using their own materials, which are designed to present each one favorably. Before you sign a PEO agreement or renew one you’re already in, it’s worth getting a structured comparison that puts the relevant criteria side by side.
Many firms unknowingly overpay because of bundled fees, hidden administrative markups, and contracts designed to limit flexibility. A clear, side-by-side breakdown of pricing, services, and contract terms helps you see exactly what you’re paying for and choose the option that genuinely fits your firm’s structure.
Don’t auto-renew. Make an informed, confident decision.
Before you sign that PEO renewal, make sure you’re not leaving money on the table.
Many businesses unknowingly overpay because of bundled fees, hidden administrative markups, and contracts designed to limit flexibility. We give you a clear, side-by-side breakdown of pricing, services, and contract terms, so you can see exactly what you’re paying for and choose the option that truly fits your business.
