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Best HR outsourcing services of 2021

Included in this guide:

An image of a woman working at a desk using the best HR outsourcing services.
(Image credit: Claudio Scott / Pixabay)

The best Human Resources (HR) outsourcing services help you better and more effectively manage your Human Resources admin and costs.

The best HR outsourcing services

There are difference levels available, from simply covering basic payroll, to full PEO services which allows all aspects of HR to be outsourced.

Of course, there is also HR software that can be used in house to simplify administration. However, the reasons why HR might be outsourced are many, but cost is a key concern. 

It's not just that there is a direct administrative cost in managing HR, but also training and specialism, plus legal and compliance, and additionally office space required to house all relevant HR staff that can become especially expensive in major cities.

Additionally, HR outsourcing companies can boast staff with years or decades of experience, as well as legal teams to ensure compliance. On top of this, companies that manage many employees across different companies can broker special compensation package deals which provides added value as well.

Overall, while some people might see HR as a necessary chore, other businesses are happy to provide that service with added benefits for a fee that can be well below the cost of setting up HR services in house.

Here therefore are the best HR outsourcing services currently available.

(Image credit: Oasis)

1. Oasis

The best HR outsourcing service

Reasons to buy
+Comprehensive features+Self-service platform+Fortune 500 benefits

Oasis is a Paychex-owned Professional Employer Organization (PEO) and provides a full range of full HR solutions for business, to cover the entire employee lifecycle.

This means covering everything from recruitment to onboarding, payroll and benefits, as well as development and training. Oasis also ensures regulatory compliance and mitigating risk.

Oasis does this through a combination of self-service computer software for easier employee management, to personalized support to ensure you're getting the help you need.

Performance management also ensures that employee development works in line with your business strategy.

Because Oasis is part of Paychex, which has offices across the US, the company can offer competitive benefits and insurance packages for employees on a par with those offered by Fortune 500 companies.


(Image credit: Insperity)

2. Insperity

The best full service HR plans

Reasons to buy
+Nationwide service+Different plan levels+IRS certified

Insperity offers a full-service HR solution according to two main plans: the first being 5-149 employees, and the second for 150-5000 employees. Both cover all the HR basics, not least HR admin and payroll, risk-management and compliance, benefits, as well as employee training and management. The main difference between the programs is a case of where the put the focus of the service, and of course the price.

The first plan for small businesses is a full-service solution focused on providing a strong, stable, and supported HR management plan in the first place, while being able to offer insurance benefits normally expected with a Fortune 500 company. Insperity also uses its own software platform to manage all aspects of payroll, accounting, and cost administration, not to mention tax filing. As expected, they also provide support and advice for compliance and liability issues, as well as performance management.

The second plan for medium to large businesses provides the same services while putting the focus on productivity and profitability, not least to work to prevent IT sprawl and inefficiencies that necessarily plague business systems the larger they get. The aim is to provide detailed cost inventory and manage them to ensure budget certainty. This is especially relevant where a business may be involved in a merger or acquisition and needs to integrate employees from different payroll systems into one.

In all, Insperity provide a wide-ranging solution, and although two different plans have been mentioned, Insperity also provide individual HR services as required.


(Image credit: Paychex)

3. Paychex

Data-driven HR solutions

Reasons to buy
+Different service levels available+Good suite of services+Accredited by IRS and ESAC

Paychex HR offers both human resources consulting as well as HR outsourcing and PEO services. This means you can look at different levels of service according to your business needs, from simply asking for guidance on how to better streamline your existing HR workflows, to completely outsourcing all of your HR and employment needs to Paychex.

As expected, Paychex provides all the expected services in terms of HR management, payroll and benefits administration, as well as compliance and legal services. Where Paychex differs from the competition is its focus on digital streamlining where possible, in order to ensure maximum efficiency and productivity in all aspects of human resources management. 

For example, with Paychex Flex you can easily manage your business health insurance, section 125 plans, 401(k) and other employee benefits from a single online platform. Changes can be made in real-time, and set up so that employees can easily access the information without having to ask for it.

The whole process means less time is spent on low-value administrative tasks, while streamlining existing procedures. Additionally, it's also easier to search for actionable insights to improve efficiency, with analytics automated to work through the Paychex HR management system to reveal trends and provide custom reporting. 

Altogether, Paychex is another strong company with a strong suite of services, and even better in that you can easily select the right level of service for your business.


(Image credit: ADP)

4. ADP HR Services

The big HR provider for business

Reasons to buy
+Nationwide service+For small or large businesses+IRS certified

ADP HR Services are designed for larger businesses that want to focus more on strategy, or else could benefit companies undergoing a merger or acquisition. The Comprehensive Services package allows a business to outsource either all of its HR services to ADP, or just selected HR services.

The services available include employee recruitment, retention, and engagement, with performance management and compensation benchmarking. ADP can also handle all aspects of benefits administration, from carrier connections and eligibility reporting, to open enrollment administration, as well as new hire and life event enrollments, and all administrated under COBRA guidelines. ADP can also ensure compliance with legal frameworks, not least ACA and FMLA.

Of course, ADP can also take on board payroll administration to reduce compliance risk, not least in dealing with managing time and attendance, but also with regards to federal and state tax changes, as well as offering proactive guidance on best practices.


(Image credit: G&A Partners)

5. G&A Partners

Packaged or individual HR solutions

Reasons to buy
+Nationwide service+Packaged or individual services+IRS certified

G&A Partners offers a full-service HR solution as an outsourced alternative for businesses to manage and administrate HR services, payroll, and employee benefits. They run this using their own HR technology platform, Worksight, which offers SaaS (Software as a Service) that works with SSO (Single Sign On) technology. 

Using Worksight, G&A are able to cover all aspects of recruitment, onboarding, time and attendance, performance management, benefits enrollment, and performance management. For recruitment, G&A use an applicant tracking system (ATS) which allows them to search online applicant databases in order to create job descriptions and compensation packages suitable to the post. G&A can screen applicants, and allow them to communicate through the recruitment process.

The Worksight platform allows all employment forms to be signed and stored directly in the system, and provides real-time updates on the employee onboarding process. The time and attendance system allows for employees to clock in digitally, and also manage all aspects of creating and managing schedules, as well as vacations and sickness. 

G&A Partners also provides expert guidance on a range of other issues, not least safety at work compliance, healthcare reform, and benefits administration tailored to weighting these to the most needed positions as required.

Overall, G&A Partners provides a wide range of services, which can be packages together as a single solution or worked with individually depending on which actual HR services you need.


(Image credit: TriNet)

6. TriNet HR services

The flexible provider with industry insights

Reasons to buy
+Flexible service options+Industry experience and expertise+Accredited

TriNet offers a range of HR services, including HR consultancy, benefits management, payroll services, risk mitigation, all run through a single software platform. They can also provide mobile apps for employee expenses, time management, wages and benefits statements. These services can be taken packaged together, as individual outsourced services, or even a full-service PEO (Professional Employer Organization) as required. 

What makes TriNet standout a little more from its competition is that its advisers have specialist industry experience, not least in architecture & engineering, consulting, financial services, life sciences, manufacturing, marketing, retail, technology, and nonprofits. The aim is to make sure this expertise translates into actionable insights specific for your business, and therefore help improve some aspect of efficiency, workflows, or productivity.

Another advantage of TriNet is that it charges on a per-employee basis, rather than as a percent of payroll. This means your HR costs are predictable and consistent, which can be especially advantageous to small businesses who need to have a very clear idea of costs. TriNet is also able to work comfortable with businesses of different sizes, tailoring plans accordingly, though some services may require an employee minimum to make them financially worthwhile.

Overall, TriNet is a flexible provider that could offer industry insights while providing a comprehensive range of HR outsourcing services.

Also consider these HR outsourcing services

There are a large number of different HR outsourcing providers out there, more than we've been able to cover here so far. Some of these companies cater more for small businesses, but others focus on larger businesses and so have a minimum number of employees to work with.

Therefore to help you find the HR service to suit you, we've listed below other notable HR outsourcing companies that it's worth you checking out:

XcelHR provides a range of outsource HR solutions including human resources management, payroll and tax administration, talent acquisition, benefits administration, retirement services, and risk management. 

Justworks is a full service HR company that can provide support and consulting as required. Their main service provisions include payroll, benefits, and compliance, on top of routine HR tasks. 

Abel HR is a HR provider that can offer a full service provision as a PEO, or support specific needs with services available for payroll, insurance and other benefits, as well as other outsourced solutions.

Acadia HR can provide a full range of HR support and management services for companies of all sizes, covering everything from payroll and compliance, to hiring and training.

Brian Turner

Brian has over 30 years publishing experience as a writer and editor across a range of computing and technology titles, and has been interviewed multiple times for BBC News and BBC Radio. His specialty on Techradar is Software as a Service (SaaS) applications, covering everything from office suites to IT service tools. He is also a science fiction and fantasy author, writing as Brian G Turner.