In this guide
Start with the work your organization needs done and the work it can reliably keep. A PEO, an administrative-services arrangement and a payroll processing service can all sound like “HR outsourcing” in conversation. That label is too broad to allocate an approval, validate a benefit change or decide who responds to a notice.
OneDigital’s HR and payroll solutions page distinguishes offerings including a co-employment PEO model. It is a starting description, not a substitute for the specific proposal. The useful comparison is a row-by-row account of responsibilities, supported by contract language and a realistic view of internal capacity.
Write your operating problem without naming a product
For example: “Our payroll lead can reconcile a register, but managers submit late changes and nobody owns carrier discrepancies.” That is more actionable than “We need a full-service solution.” A provider could process payroll well while the same late approvals and unresolved coverage records persist.
List recurring activities for a normal month, a busy month and an exception. Include collecting time, approving changes, reviewing payroll outputs, resolving benefit-file rejections, responding to tax notices, managing administrator access and retrieving records after termination. Estimate internal effort separately from the provider fee. A task that moves to a vendor can still require preparation and acceptance by your team.
| Workstream | Question for every proposal | Evidence to ask for |
|---|---|---|
| Payroll | Who prepares, checks and authorizes each run? | Sample responsibility schedule and exception route |
| Benefits administration | Who notices and resolves rejected or unmatched changes? | Carrier reconciliation description and handoff evidence |
| HR support | Which issues receive advice, execution or specialist referral? | Scope and exclusions with named escalation types |
| Records | Which exports can we obtain during and after the relationship? | Data dictionary, sample export and exit provisions |
| Risk support | Which safety activities stay at the worksite? | Service schedule and local responsibility assignment |
Three fictional capacity cases
Case A: an understaffed but stable operation. A 35-person organization has a consistent work schedule and a single payroll approver, but no backup. Outsourcing additional processing might help; it does not create an internal substitute who can approve the run during an absence. The first decision is whether the proposed model and internal staffing together close that gap.
Case B: rapid organizational change. A 70-person organization regularly adds locations and changes benefit eligibility groups. Its difficulty is not only processing volume. It needs reliable event intake, effective-date decisions and coordinated review. Compare how each proposal handles a new work location or a midcycle correction, including the work the organization must initiate.
Case C: strong internal specialists. A 120-person organization has experienced payroll and benefits staff but fragmented tools. It may value better integration and evidence access more than broad advisory services. Ask the provider to demonstrate the export and approval requirements using fictional data. Do not assume the broadest package is the best operational fit.
Do not generalize the tax arrangement
The IRS distinguishes several third-party payer arrangements and explains that federal employment-tax responsibility depends on the arrangement and facts. A general promise to “handle taxes” does not answer who files under which relationship or how evidence is obtained. Have the proposed arrangement reviewed using the actual contract and relevant tax guidance.
This comparison deliberately does not assign legal conclusions to the labels PEO or ASO. Nor does it estimate savings from a national average. Your decision needs your service scope, internal labor, transition effort, benefit design and risk allocation. The quote-normalization exercise helps separate those cost components without inventing a provider price.
Make a reversible decision record
Use a short decision memo: problem to solve; selected model; work retained; provider deliverables; evidence promised; assumptions not yet confirmed; and review trigger. A trigger might be a new state, an acquisition or sustained exceptions, rather than an arbitrary calendar date alone.
Record the alternative you did not select and why. If the original problem was missing internal approvals, a later system change should not erase that reason. The memo makes it easier to recognize whether the model is still serving the organization or whether the same unmet responsibility has simply changed names.
Before implementation, test one ordinary workflow and one exception with both parties. If each expects the other to initiate the same step, the comparison is unfinished. Resolve that handoff in the operating map before presenting the selection as ready to launch.