Softwr

Payroll · head to head

Justworks vs Paychex Flex

Justworks logo

Justworks

Payroll

Professional employer organisation with published per-employee pricing and a separate payroll-only tier

From
$8/month
Rated
-
Full reviewWebsite
Paychex Flex logo

Paychex Flex

Payroll

Payroll and HR solutions that grow with you

From
$39/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Justworks the published per-employee fee is the platform charge, not your cost; health insurance premiums and workers' compensation are billed on top and are usually several times larger, so the transparent price is transparent about the smaller number.; Paychex Flex no published pricing rates available
  • They diverge on capability: Justworks covers Co-employment PEO, Paychex Flex covers Payroll Processing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Justworks and Paychex Flex actually diverge.

Attributes where Justworks and Paychex Flex differ
AttributeJustworksPaychex Flex
Starting price$8/month$39/month
Pricing modelPer employee per monthquote
FoundedUnknown1971

Identical on both: free tier (No), platforms (Web, iOS, Android), user rating (Not yet rated), category (Payroll).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Justworks

  • Co-employment PEO
  • Large-group benefits
  • Payroll and filings
  • Workers' compensation
  • Compliance support
  • Standalone payroll
  • International contractors
  • HR consulting

Only in Paychex Flex

  • Payroll Processing
  • Tax Administration
  • HR Services
  • Benefits Administration
  • Time and Attendance
  • Retirement Services
  • QuickBooks
  • Xero

What people use each for

The jobs each tool is most often brought in to do.

Justworks

  • A twenty-person US startup that wants health insurance comparable to a large employer without an insurance broker relationshipnot Paychex Flex
  • A company hiring across several US states that does not want to register as an employer and file taxes in each of themnot Paychex Flex
  • A founder replacing a bookkeeper-run payroll with something that will not produce a state tax penalty noticenot Paychex Flex
  • A team that wants payroll and benefits administration only, without co-employment, at the $8 per employee tiernot Paychex Flex

Paychex Flex

  • Running payroll and filing payroll taxes for small and mid sized US businessesnot Justworks
  • Combining payroll with benefits administration and HR services from one vendornot Justworks
  • Handling multi state payroll compliance and year end tax formsnot Justworks

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Justworks

  • The published per-employee fee is the platform charge, not your cost; health insurance premiums and workers' compensation are billed on top and are usually several times larger, so the transparent price is transparent about the smaller number.
  • Leaving a PEO is a project, not a cancellation: you must source your own health plan, obtain your own state employer registrations and unemployment accounts, and time the switch to a plan year, which typically takes months.
  • Coverage is United States only, so the moment you hire your first employee in another country you are running a second system and Justworks handles them only as a contractor.
  • PEO Basic looks like a cheaper way in but excludes the Justworks health plans, which is the main reason companies choose a PEO at all, so most buyers end up on Plus.
  • Benefit plan choice is constrained to what Justworks has negotiated, and a company with strong preferences about carriers or network coverage in a specific region may find the options do not fit.

Paychex Flex

  • No published pricing rates available
  • Pricing varies significantly based on employee count and business needs
  • All pricing requires direct contact with sales team

Pricing, plan by plan

Justworks

$8/month
  • Payroll$8/month
    • Plus a $50 monthly base fee
    • Payroll, tax filing and benefits administration
    • No co-employment, so no access to Justworks health plans at PEO rates
  • PEO Basic$79/month
    • Full co-employment PEO
    • Payroll, tax filing and compliance
    • Does not include access to Justworks-sponsored health plans
  • PEO Plus$109/month
    • Everything in Basic
    • Access to Justworks health, dental and vision plans
    • Premiums are billed separately and are the larger cost
  • Dedicated HR consulting$30/month
    • Add-on to PEO plans
    • Named HR adviser support

Paychex Flex

$39/month
  • Essentials$39/month
    • Payroll Processing
    • Tax Services
    • Direct Deposit
  • Select$undefined/month
    • All Essentials features
    • HR Administration
    • Onboarding

Which should you pick?

Choose Justworks if

  • You need co-employment peo.
  • You work on Web, iOS, Android.
  • You also want large-group benefits.
Justworks review

Choose Paychex Flex if

  • You need payroll processing.
  • You work on Web, Ios, Android.
  • You also want tax administration.
Paychex Flex review

Questions people ask

Is Justworks or Paychex Flex better?
Neither clearly leads. Justworks starts at $8/month and Paychex Flex at $39/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Justworks or Paychex Flex?
Justworks starts at $8/month and Paychex Flex at $39/month.
Does Justworks or Paychex Flex run on more platforms?
Justworks runs on Web, iOS, Android. Paychex Flex runs on Web, Ios, Android.
What is Justworks best used for?
Justworks is most often used for a twenty-person us startup that wants health insurance comparable to a large employer without an insurance broker relationship, a company hiring across several us states that does not want to register as an employer and file taxes in each of them, a founder replacing a bookkeeper-run payroll with something that will not produce a state tax penalty notice, a team that wants payroll and benefits administration only, without co-employment, at the $8 per employee tier. Of those, a twenty-person us startup that wants health insurance comparable to a large employer without an insurance broker relationship and a company hiring across several us states that does not want to register as an employer and file taxes in each of them are not what Paychex Flex is typically brought in for.
What can Justworks do that Paychex Flex cannot?
Justworks covers Co-employment PEO, Large-group benefits, Payroll and filings, Workers' compensation. Paychex Flex covers Payroll Processing, Tax Administration, HR Services, Benefits Administration.

Answered from the vendors’ own pages

Justworks: What does co-employment actually mean?

Justworks becomes the employer of record for payroll tax and benefits purposes while you retain full control over hiring, management and day-to-day work. It is a legal arrangement, not an outsourcing of your team.

Paychex Flex: How much does Paychex Flex cost?

Paychex does not publish specific pricing rates. Pricing depends on your employee count and specific business needs. Customers must contact the sales team at 833-729-8200 or use the Request Pricing option for a custom quote.

Source
Justworks: Is the $79 figure my total monthly cost per employee?

No. It is the platform fee. Health insurance premiums, dental, vision and workers' compensation are additional and typically dwarf it.

Paychex Flex: What Paychex Flex packages are available?

Three main payroll packages are offered: Paychex Flex Select, Paychex Flex Pro, and Paychex Flex Enterprise. There is also an Express package for specific scenarios like one-employee payroll.

Source
Justworks: Can Justworks employ people outside the US?

No. It can pay international contractors, but it is not an employer of record abroad.

Paychex Flex: Does Paychex offer promotional pricing?

Paychex offers a promotion providing three months of free payroll services for new clients who process their first payroll by June 18, 2027, and maintain continuous payroll processing for 12 consecutive months. Eligible companies have 1-250 employees.

Source
Justworks: What is the difference between the Payroll plan and the PEO?

The Payroll plan handles payroll and benefits administration under your own EIN at $8 per employee per month plus a base fee. The PEO adds co-employment and pooled large-group insurance at $79 or $109.

Paychex Flex: What factors affect Paychex Flex pricing?

Pricing is based on employee count, specific features needed including HR, benefits, time tracking, insurance, and your chosen service tier.

Source
Share

Related pages

More on Justworks

More on Paychex Flex

Keep looking

Other head to heads