ASO Services
How ASO Services Are Priced
How ASO services are priced: the pricing models you will meet, what drives the cost and the fees that are easy to miss.
How much ASO services cost
Common pricing models: per employee per month, bundled tiers, and custom quote. Too few vendors publish comparable list prices for us to give a price range (so far guHRoo ASO does); the models and cost drivers below explain what you will be quoted.
Cost by company size
guHRoo ASO Professional Payroll & HR (ASO)$79/employee/mo1
| Employees | guHRoo ASO Professional Payroll & HR (ASO) |
|---|---|
| 1 | $79/mo |
| 10 | $790/mo |
| 25 | $1,975/mo |
| 50 | $3,950/mo |
| 100 | $7,900/mo |
| 250 | $19,750/mo |
Pricing models explained
- Per employee per month. A flat monthly amount for each employee for the services you select. It is the most common ASO fee and scales with headcount, not wages.
- Bundled tiers. Packages such as payroll only, payroll plus HR, or full HR administration, each with its own per-employee rate.
- Custom quote. Most ASOs quote after reviewing headcount, states, services and the platform you need; few publish prices.
Extra and hidden costs
Easeworks ASO
Benefits premiums (client keeps its own plans), Workers' compensation premiums (client keeps its own policy)2
XcelHR ASO
Fee for client reporting states where the client has no account, Nominal employee fee on some services3
ADP Comprehensive Services
Global payroll integration, Full service garnishments (outside the Payroll bundle), ADP Marketplace third-party integrations, Affirmative action planning, Employee leave administration, Unemployment compensation management4
guHRoo ASO
$1,000 monthly minimum, Implementation fee equal to two months of billing1
VertiSource HR ASO
Bookkeeping add-on, scoped and priced separately5
What drives the price
- Number of employees and the states they work in
- Services selected: payroll, benefits administration, HR administration, HR advisory, time tracking, recruiting
- An on-demand HR line or a dedicated HR advisor
- Benefits administration scope: ACA filings, COBRA and carrier connections
- Add-ons and integrations
Fees to ask about before you sign:
- Monthly minimum fees, which weigh most on small headcounts
- Implementation fees, sometimes set as a multiple of the monthly bill
- Add-ons priced separately, such as garnishments, leave administration and third-party integrations
- Fees for filing in states where you have no tax account yet
- Your own benefit premiums and workers' compensation policy, paid separately from the ASO fee
More on ASO services
- All administrative services organizations (ASO), ranked
The full ranking, top picks and how to choose.
- ASO Services comparison table
Every product side by side: score, price and verified features.
- ASO services for small business
The ranking reweighted for small business.
- ASO services for mid-sized companies
The ranking reweighted for mid-sized companies.
- ASO services for manufacturing
The ranking reweighted for manufacturing.
- ASO services for healthcare
The ranking reweighted for healthcare.
- HR software pricing index
Median published prices in every HR category, free to reuse.
Frequently asked questions
How much does an ASO cost?
ASOs usually charge a per-employee monthly fee for the services you select, and most give prices only in a quote; guHRoo is one that publishes its price: $79/employee/mo ($1,000/mo minimum), plus an implementation fee (Equivalent of two months' billing). Some providers set a minimum headcount instead: ADP Comprehensive Services is for employers with 25 or more employees. CO—, the U.S. Chamber of Commerce's small business site, says PEOs cost more than ASOs, but a PEO's price typically includes insurance coverage and more services. Your own benefit premiums and workers' compensation policy are paid separately from the ASO fee.
Do ASO services publish their prices?
Of the 13 ASO services we track, 1 publishes a list price we can compare at 25 employees and 10 are quote-only (ADP Comprehensive Services, AsureWorks, C2 Essentials ASO, Connor & Gallagher OneSource ASO, and 6 more).
How this page was made
What it is built from
6 verified facts, each checked against the vendor's own pages or another primary source, most recently on Oct 24, 2026.
Method
Scored and compared with the LeadChange methodology, version 1.5. Read the methodology
Independent review
Our independent review of Nov 7, 2026 asked for changes. How we review
Hands-on testing
We have not tested these products hands-on: this page uses public information only.
Who made it
The LeadChange Research Team, following a written research process. No named expert has reviewed this page. About us
Independence and errors
Who pays us never changes a score or a rank. If something here is wrong, tell us and we correct it publicly. Request a correction
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Sources
The 5 pages this page's facts come from. The date beside each is our last check of the facts taken from it (the oldest, when they differ). The numbers beside the figures above link here.
Quotes from the sources
- guHRoo guhroo.co/pricing“$79*” “$1,000 monthly minimum”
- Easeworks easeworks.com/aso-pricing-california“Benefits and workers' comp are not included—you maintain those separately.”
- XcelHR xcelhr.com/services/peo-and-aso“*** fee will apply to Client Reporting States where Client does not have an account”
- ADP adp.com/what-we-offer/products/adp-comprehensive-services/compare-options.aspx“*Services available for an additional fee”
- VertiSource HR vertisourcehr.com/pricing“Monthly bookkeeping, scoped and priced separately.”