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Payroll · head to head

Paychex Flex vs Sage 300 Construction

Paychex Flex logo

Paychex Flex

Payroll

Payroll and HR solutions that grow with you

From
$39/month
Rated
-
Full reviewWebsite
Sage 300 Construction logo

Sage 300 Construction

Construction

Cloud-based construction ERP software

From
$400/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Paychex Flex no published pricing rates available; Sage 300 Construction the Internet Archive's capture of Sage's product page on 25 December 2019 confirmed Sage 300 Construction and Real Estate as a distinct 'Other products' entry separate from the mainline Sage 300cloud accounting product, with no price figure published for either.
  • They diverge on capability: Paychex Flex covers Payroll Processing, Sage 300 Construction covers Project management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Paychex Flex and Sage 300 Construction actually diverge.

Attributes where Paychex Flex and Sage 300 Construction differ
AttributePaychex FlexSage 300 Construction
Starting price$39/month$400/month
Pricing modelquotesubscription
PlatformsWeb, Ios, AndroidWeb, Windows
CategoryPayrollConstruction
Founded19711981

Identical on both: free tier (No), user rating (Not yet rated).

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 Paychex Flex

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

Only in Sage 300 Construction

  • Project management
  • Accounting
  • Job costing
  • Payroll
  • Equipment management
  • Stripe
  • Box
  • SOC 2 compliance

Both cover

  • QuickBooks
  • Microsoft 365
  • Web support

What people use each for

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

Paychex Flex

  • Running payroll and filing payroll taxes for small and mid sized US businessesnot Sage 300 Construction
  • Combining payroll with benefits administration and HR services from one vendornot Sage 300 Construction
  • Handling multi state payroll compliance and year end tax formsnot Sage 300 Construction

Sage 300 Construction

  • Financial managementnot Paychex Flex
  • Job costingnot Paychex Flex
  • Payrollnot Paychex Flex
  • Equipment trackingnot Paychex Flex

Where each one falls short

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

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

Sage 300 Construction

  • The Internet Archive's capture of Sage's product page on 25 December 2019 confirmed Sage 300 Construction and Real Estate as a distinct 'Other products' entry separate from the mainline Sage 300cloud accounting product, with no price figure published for either.

Pricing, plan by plan

Paychex Flex

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

Sage 300 Construction

$400/month
  • Professional$400/month
    • Project management
    • Accounting
    • Job costing
  • EnterpriseFree
    • Equipment management
    • Advanced analytics
    • Custom workflows

Which should you pick?

Choose Paychex Flex if

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

Choose Sage 300 Construction if

  • You need project management.
  • You work on Web, Windows.
  • You also want accounting.
Sage 300 Construction review

Questions people ask

Is Paychex Flex or Sage 300 Construction better?
Neither clearly leads. Paychex Flex starts at $39/month and Sage 300 Construction at $400/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Paychex Flex or Sage 300 Construction?
Paychex Flex starts at $39/month and Sage 300 Construction at $400/month.
Does Paychex Flex or Sage 300 Construction run on more platforms?
Paychex Flex runs on Web, Ios, Android. Sage 300 Construction runs on Web, Windows.
What is Paychex Flex best used for?
Paychex Flex is most often used for running payroll and filing payroll taxes for small and mid sized us businesses, combining payroll with benefits administration and hr services from one vendor, handling multi state payroll compliance and year end tax forms. Of those, running payroll and filing payroll taxes for small and mid sized us businesses and combining payroll with benefits administration and hr services from one vendor are not what Sage 300 Construction is typically brought in for.
What can Paychex Flex do that Sage 300 Construction cannot?
Paychex Flex covers Payroll Processing, Tax Administration, HR Services, Benefits Administration. Sage 300 Construction covers Project management, Accounting, Job costing, Payroll. Both handle QuickBooks, Microsoft 365, Web support.

Answered from the vendors’ own pages

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
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
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
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
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