Cost by Size / 25 Employees

Payroll cost for 25 employees: where PEO becomes a real option

25 employees is the size band where the payroll decision starts to get genuinely interesting. The per-employee fee dominates total cost, multi-state becomes common, benefits administration moves from optional to table stakes, and the PEO model becomes a real consideration for the first time. Standalone payroll providers land $137 to $400 monthly. Mid-tier products like Gusto Plus reach $380. PEOs land $1,475 to $1,750. This page works through the full comparison and the operational considerations that shift the answer.

Standalone payroll providers at 25 employees

Monthly cost for full-service payroll covering 25 W-2 employees on each provider's most common small-business plan. Pricing as of 16 May 2026, with quote-only providers estimated from G2 and TrustRadius aggregated data.

Provider	Total at 25	Notes
Patriot Software Full Service	$137	Cheapest legitimate option. Stripped-down product.
Paychex Flex Essentials (est.)	$164	Lowest per-employee fee, quote-only, 12-month contract.
QuickBooks Payroll Core	$195	Wins for QuickBooks Online users by accounting integration value.
OnPay	$199	Includes multi-state, HR, benefits administration. Single tier.
Gusto Simple	$199	Published pricing, modern interface, accountant-friendly reports.
Rippling (payroll only)	$235	Cheapest base, highest per-employee. Most value with HR/IT modules.
ADP Run Enhanced (est.)	$350	Mid-range Run tier with HR features. Quote-based, 12-month contract.

Mid-tier and PEO alternatives at 25 employees

Mid-tier payroll plus the entry-level PEO options. PEO pricing assumes Justworks Plus with Benefits as the lower bound and Insperity mid-range estimate as the upper. ADP TotalSource and TriNet are also options at this size, with pricing dependent on average salary and configuration.

Option	Total at 25	Notes
Gusto Plus	$380	Includes multi-state, time tracking, next-day deposit.
Justworks Plus with Benefits	$3,975	PEO with full HR, benefits, workers' comp consolidated.
Insperity (est.)	$1,750	Estimated mid-range PEO with dedicated HR consultant.

The decision framework at 25 employees

At this size band the decision splits into three tracks. Track one is cost-optimised standalone payroll: Patriot, Paychex Flex, or Gusto Simple at $137 to $199 monthly. You handle HR, benefits, and workers' comp through separate tools or relationships. Total stack cost lands around $400 to $1,200 monthly depending on what else you need.

Track two is mid-tier integrated payroll plus light HR: Gusto Plus, OnPay (which includes more at base), or Rippling with HR modules at $300 to $700 monthly. This consolidates time tracking, PTO, benefits administration, and onboarding into the payroll platform. Stack cost lands around $500 to $900 monthly.

Track three is PEO: Justworks Plus with Benefits at $1,475 monthly, Insperity at roughly $1,750, TriNet at $3,000 to $5,000, or ADP TotalSource at variable percentage-of-payroll pricing. The PEO consolidates payroll, benefits, HR consulting, workers' comp, and compliance into a single relationship. The cost premium is real but the operational consolidation can be worth it for businesses without dedicated HR.

When the PEO premium pays off

The 25-employee PEO buyer is almost always one of two profiles. First, a growing business without dedicated HR staff that needs the consulting layer plus benefits negotiation leverage plus workers' comp consolidation in a single relationship. Justworks Plus with Benefits at $1,475 monthly for 25 employees is more expensive than a fragmented stack of Gusto Plus ($380) plus a benefits broker ($0 to $500) plus a fractional HR consultant ($1,000 to $3,000), but the consolidation and the dedicated success contact are worth the trade for many businesses at this size.

Second, a business in a lower-salary industry (restaurants, retail, hospitality) where ADP TotalSource's percentage-of-payroll model becomes competitive. For 25 employees averaging $35,000 salary, ADP TotalSource at 5 percent is $3,646 monthly versus Justworks Plus with Benefits at $3,975. ADP wins by $329 and brings deeper industry-specific compliance.

When the PEO premium does not pay off

For 25-employee tech-adjacent businesses with already-established HR processes, modern tooling preferences, and willingness to manage a fragmented stack, the PEO premium is hard to justify. Gusto Plus at $380 plus a benefits broker plus a $1,500 fractional HR consultant equals roughly $2,000 monthly, where Justworks Plus with Benefits is $1,475 but bundles things you may not value as much (the success consultant, the unified platform, the policy library). The $525 monthly difference is real but the operational style difference may matter more.

For 25-employee high-salary professional services firms (legal, consulting, financial), the percentage-of-payroll PEOs (ADP TotalSource, Paychex PEO) typically become very expensive. A 25-person legal firm averaging $150,000 salary pays ADP TotalSource at 5 percent roughly $15,625 monthly, where Justworks Plus with Benefits is $3,975. The percentage model is fundamentally misaligned with this profile and even the PEPM PEOs are more expensive than the fragmented standalone stack.

What changes at 50 and 100 employees

Above 25 employees, the rankings shift further toward providers with lower per-employee fees (Paychex Flex, ADP) and toward integrated HRIS platforms (Rippling, Paylocity, ADP Workforce Now). Below the 25 mark, simpler products like Patriot and Gusto Simple dominate.

At 50 employees, the PEO conversation gets more serious because the operational scale starts justifying the consulting layer. At 100 employees, the conversation often shifts from PEO to dedicated HRIS plus in-house HR leader because the cost premium of PEO at large scale starts exceeding what an in-house HR director and configured tools cost. See payroll cost for 100 employees for that decision.

Where to go next

Payroll cost for 5 employees

The smaller size band where base fee still matters.

Payroll cost for 100 employees

Where in-house HR plus dedicated HRIS becomes a real alternative.

PEO vs payroll service

The full PEO-vs-standalone decision framework.

Justworks PEO cost

The most common PEO entry point at this size.

25-employee payroll cost FAQs

What is the cheapest payroll provider for 25 employees?

Patriot Software Full Service at $137 per month, followed by Paychex Flex Essentials at an estimated $164. The next tier is QuickBooks Core at $195, OnPay and Gusto Simple tied at $199. Rippling payroll-only is $235. ADP Run Enhanced lands $250 to $400 depending on configuration. The spread from cheapest to most expensive among standard payroll providers is roughly $263 per month at this size.

Why does the per-employee fee dominate at 25 employees?

At 25 employees, the per-employee component is the majority of every provider's bill. Gusto Simple at $199 monthly has $150 in per-employee fees ($6 x 25) versus only $49 in base fee. That is 75 percent of cost from the per-employee fee. The base fee, which matters more at 1 to 5 employees, becomes nearly irrelevant. This is why Paychex's $5 per-employee fee beats Gusto's $6 at this size despite similar base fees.

When should a 25-employee company consider a PEO?

When you would otherwise be paying for fragmented services: a payroll provider, plus a benefits broker, plus a fractional HR consultant, plus workers' comp insurance broker, plus separate HR tools. A 25-employee company on this fragmented stack typically pays $1,000 to $2,500 per month combined. Justworks Plus with Benefits at $1,475 ($59 x 25) consolidates all of this. The PEO conversation makes sense when the unified service is worth more than the per-employee premium over standalone payroll.

Is Gusto Plus at $380 worth $181 more than Gusto Simple at $199?

Yes if you need at least two of: native time tracking, multi-state payroll, next-day direct deposit, or project costing. If you currently pay $5 to $8 per employee for a standalone time tracking tool ($125 to $200 at this size), Gusto Plus absorbs that cost and adds the rest of the upgrade for marginal extra spend. If you only need basic payroll, Gusto Plus is overspending and OnPay at $199 includes those features for less.

What about ADP Run at 25 employees?

ADP Run Enhanced at an estimated $250 to $400 monthly for 25 employees is in the middle of the price range. The case for ADP at this size is the broader compliance and reporting capability for businesses in regulated industries, multi-state operations, or with rapid scaling plans. For a general-purpose 25-employee business, Gusto Simple at $199 or Paychex Flex at $164 typically deliver equivalent value at lower cost. ADP's value proposition strengthens at 50+ employees.

Does the salary level change the answer?

Yes if you are weighing PEPM PEOs against percentage-of-payroll PEOs. For 25 employees averaging $50,000 salary, total monthly payroll is $104,167. ADP TotalSource at 5 percent is $5,208 monthly versus Justworks Plus with Benefits at $3,975. For 25 employees averaging $100,000 salary, total monthly payroll is $208,333. ADP TotalSource at 5 percent is $10,417 versus Justworks Plus with Benefits still at $3,975. Higher-salary teams should pick PEPM PEOs.

What is the operational difference at 25 employees that changes the math?

Several. Multi-state employment is typically present at this size. Benefits offering becomes table stakes for hiring. The first dedicated HR person is often hired around 30 employees. Workers' compensation becomes more material as headcount grows. Compliance complexity grows non-linearly (different states have different SUI rates, different new-hire reporting, different paid leave requirements). A 25-employee business has dramatically more HR and compliance work than a 10-employee business, which is why provider choice matters more at this size.