This glossary defines 22 essential terms in HR service delivery, organized into five sections:
- Foundational Concepts
- Delivery Models
- Outsourcing and BPO
- Compliance Support
- Service Infrastructure
It is the vocabulary reference for growth-stage B2B operators (owners, HR leaders, and finance leaders) scoping the HR function and evaluating provider models, from self-service platforms to fully managed HR outsourcing, to run payroll, benefits, and compliance operations accurately and at scale. Asure is a useful reference point throughout this glossary because it operates across more of that spectrum than a single-category vendor comparison usually allows: AsureCentral sits at the connected, self-service end as a platform a company runs itself, AsureWorks sits at the fully managed end with Asure specialists running the work, and the two operate on the same underlying system rather than requiring a company to switch platforms when its delivery-model decision changes.
Foundational Concepts
HR Services
HR services refers to the full set of functions that manage the employment relationship, including payroll, benefits administration, compliance, recruiting, and employee support, delivered through some combination of in-house staff, outsourced providers, and technology platforms. It covers six core function families: payroll, benefits, compliance, talent acquisition, employee relations, and HR technology. Growth-stage operators typically start by mapping which of these six families they're already handling adequately, which are handled inconsistently, and which aren't handled at all, before deciding what to build in-house versus contract out. A 40-person software company, for example, might run payroll and benefits competently in-house while its employee relations process is entirely undocumented, a gap that tends to stay invisible until the first termination dispute forces the question. AsureCentral is built to let a company run all six function families itself on one connected platform, while AsureWorks exists for the version of this decision where a company wants Asure's specialists running the operational work directly instead.
HR Service Delivery
HR service delivery refers to the operational model by which HR functions are provided to employees and managers, encompassing the people, processes, and technology used to fulfill payroll, benefits, compliance, and support requests. Delivery models range from fully in-house to fully outsourced, with hybrid shared-services approaches becoming more common as headcount grows and the volume of routine transactions across locations or business units starts to justify a dedicated internal team. The delivery-model decision is distinct from the function-scope decision described above: two companies can agree completely on which six function families matter and still choose entirely different delivery models based on internal capacity, budget, and risk tolerance.
HR Function Scope
HR function scope refers to the defined set of workforce management responsibilities an organization assigns to its HR team or provider, distinguishing which activities are handled internally versus contracted to a third party. Scope decisions typically segment along three axes: strategic (talent strategy), operational (payroll and benefits), and administrative (compliance and recordkeeping). A common mistake at growth-stage companies is scoping only the functions that are currently painful, rather than the functions that will become mandatory at the next headcount threshold, such as ACA reporting obligations that begin at 50 full-time-equivalent employees under the IRS's employer shared responsibility provisions. A company that has comfortably stayed below that threshold for years can find itself out of compliance within a single hiring cycle if nobody was tracking the number as a scope trigger rather than a lagging indicator. Mapping function scope before selecting a delivery model is the safer sequencing: a delivery-model decision made without a documented scope tends to get revisited within a year once a gap surfaces.
HR as a Service (HRaaS)
HR as a Service (HRaaS) is a cloud-based subscription model in which an external provider delivers HR functions, including payroll, benefits, compliance, and employee support, on demand, without the client building a dedicated in-house HR team. HRaaS platforms typically bundle HRIS software with human advisory support, which is what distinguishes them from pure self-service HR software. A 60-employee marketing agency using an HRaaS arrangement, for instance, might get self-service tools for PTO requests and benefits enrollment alongside a named advisor who handles unemployment claims and multi-state new-hire registration, without ever hiring an HR generalist. The term overlaps significantly with managed HR services (defined below); the practical difference for a buyer evaluating options is usually less about the label and more about how much of the actual execution work a specific provider's version of HRaaS takes on.
Delivery Models
HR Service Delivery Model
An HR service delivery model is the structured framework that defines how HR functions are organized, staffed, and accessed, typically categorized as in-house, shared services, outsourced, or hybrid, to match an organization's size, complexity, and compliance requirements. Choosing among these models is the single largest lever in an HR operating budget, well before any specific vendor comparison matters. Getting this choice wrong rarely causes damage on day one. It shows up later, as headcount, jurisdictions, or compliance exposure grow past what the chosen model was originally built to handle. AsureCentral and AsureWorks are built to sit on the same underlying platform specifically so a company doesn't have to choose a delivery model and a system at the same time. A company can run payroll and HR itself on AsureCentral, move some or all of that execution to AsureWorks specialists later, and do it without migrating data to a new system, since both paths run on one connected platform rather than two competing products.
In-House HR
In-house HR refers to a delivery model in which all HR functions, payroll, benefits, compliance, recruiting, and employee relations, are staffed and managed by employees of the organization rather than contracted to an external provider. In-house HR tends to become cost-competitive with outsourced models as headcount grows large enough to justify one or more dedicated HR hires rather than fractional attention from an owner or office manager, though the exact crossover point depends heavily on jurisdiction complexity; a multi-state employer reaches that crossover later than a single-state one, since multi-state compliance work demands more internal capacity before an in-house team can keep pace. A single-state manufacturer with 120 employees, for example, may comfortably run HR with one generalist and a payroll platform, while a 120-employee company operating across eight states is already managing enough jurisdiction-specific wage, leave, and tax variation to make that same staffing model strained.
Shared Services HR
Shared services HR is a delivery model in which a centralized internal team provides standardized HR transactions, such as payroll processing, benefits enrollment, and compliance reporting, to multiple business units or locations within one organization. Shared services centers typically handle tier-1 and tier-2 inquiries directly, escalating complex cases to HR business partners or specialists. This model is most common at companies operating multiple locations or business units that want consistency without building a full HR team at each site. A retail chain with locations across a dozen cities, for instance, might centralize payroll processing and benefits enrollment questions into one shared services team at headquarters while leaving hiring decisions and day-to-day performance management with each site's own manager.
Self-Service HR
Self-service HR refers to a delivery approach in which employees and managers access HR information, complete transactions, and submit requests directly through a technology platform, reducing reliance on HR staff for routine administrative tasks. Common self-service functions include pay stub access, PTO requests, benefits enrollment, and address updates, typically handled through an HRIS employee portal. An employee checking a pay stub discrepancy or updating a mailing address after a move are typical self-service tasks that, done well, never need to reach an HR inbox at all. AsureCentral's employee self-service is built on this model, with Luna AI, embedded across the platform, available to answer routine employee questions and flag exceptions using real payroll and HR data, always with a human reviewing the flag rather than acting on its own.
Hybrid HR Model
A hybrid HR model is a delivery arrangement that combines in-house HR staff with one or more external providers, such as a managed-service provider or an HR advisory firm, to cover different function areas or headcount tiers within the same organization. A common hybrid structure pairs an in-house HR generalist with an outsourced payroll administrator and a compliance advisory retainer for the areas that carry the most regulatory risk. This is the model AsureCentral plus Asure HR Compliance is built around: a company runs payroll and HR itself day to day, and adds certified HR compliance expertise specifically for the areas that need it, without a full department reorganization.
Outsourcing and BPO
HR Outsourcing (HRO)
HR outsourcing (HRO) is the practice of contracting one or more HR functions, such as payroll, benefits administration, recruiting, or compliance, to a third-party provider, allowing the client organization to retain strategic HR oversight while transferring operational execution. HRO engagements are typically governed by a master service agreement with function-specific service-level agreements defining turnaround times and accuracy standards. A company might outsource payroll processing and benefits administration entirely while keeping recruiting and performance management in-house, since the outsourced functions are often the ones with the least strategic differentiation and the highest compliance exposure per error. AsureWorks is a specific example of HRO scoped to payroll and day-to-day HR administration, with the client retaining strategic control over people and policy decisions throughout.
HR Business Process Outsourcing (HR BPO)
HR business process outsourcing (HR BPO) is a form of HRO in which a vendor assumes end-to-end operational responsibility for one or more defined HR processes, such as payroll processing or benefits administration, while the client retains full legal employer status. HR BPO differs from a professional employer organization in one specific, load-bearing way: the client remains the employer of record, and the BPO executes processes under the client's own EIN rather than a shared or co-employment structure. In practice, this is the difference between a provider that runs your payroll process and a provider that becomes, legally, a co-employer of your workforce.
Professional Employer Organization (PEO)
A professional employer organization (PEO) is a firm that enters a co-employment arrangement with a client company, assuming shared employer responsibilities, including payroll tax filings, benefits sponsorship, and workers' compensation, while the client retains day-to-day workforce control. Businesses using a PEO grow at more than double the rate of comparable non-PEO businesses, see roughly 12% lower employee turnover, and are 50% less likely to go out of business, according to NAPEO's own published research (McBassi & Company study, as of September 2024). A 40-person retail chain that joins a PEO to access a large-group health plan, for example, typically also accepts the PEO's workers' compensation program and employment-practices terms as part of the same bundle, since co-employment ties those pieces together contractually rather than letting a client pick and choose. AsureWorks is built specifically as an alternative to this model for companies that want the operational relief a PEO provides without the co-employment structure: Asure specialists run payroll and day-to-day HR administration, but the client remains the sole employer of record, with no shared employer status and no requirement to move onto a bundled benefits plan.
Co-Employment
Co-employment is a legal arrangement in which two entities, typically a PEO and its client company, simultaneously hold employer status for the same workforce, sharing defined employer obligations such as payroll tax remittance, benefits sponsorship, and regulatory compliance. Under co-employment, the PEO is the employer of record for tax and benefits purposes, while the client controls hiring, firing, job duties, and day-to-day supervision. A company enrolled in a PEO's co-employment arrangement will typically see the PEO's name, not its own, on quarterly payroll tax filings and workers' compensation policies, even though its own name remains on the offer letters and performance reviews employees receive. This is the specific structural feature that separates a PEO from every other delivery model in this glossary; HRO, HR BPO, and managed HR services all leave the client as sole employer of record, while a PEO does not.
Employer of Record (EOR)
An employer of record (EOR) is a third-party organization that legally employs workers on behalf of a client company, handling payroll, tax withholding, benefits, and compliance, while the client directs the workers' day-to-day activities. EOR arrangements are most common for international hiring or rapid domestic expansion into states where the client has no registered entity. A U.S. company hiring its first employee in another country, for instance, will often use an EOR rather than registering its own foreign entity, since entity registration in a new country can take months and rarely makes sense for one or two hires. An EOR is a distinct structure from AsureWorks: AsureWorks provides managed payroll and HR administration while the client remains employer of record throughout, whereas an EOR arrangement makes the third party the employer of record itself.
Compliance Support
HR Compliance Outsourcing
HR compliance outsourcing is the practice of contracting employment law monitoring, documentation, and remediation responsibilities to a specialist provider, reducing the client's exposure to regulatory penalties across federal, state, and local jurisdictions. A company expanding from operating in two states to seven, for instance, picks up seven different sets of leave, wage, and posting requirements in the same year it is trying to focus on growth, which is exactly the moment compliance outsourcing tends to earn its cost. Asure HR Compliance delivers this as an add-on to AsureCentral or AsureWorks, covering multi-state employment law tracking, handbook maintenance, and audit-readiness documentation through certified HR professionals, without requiring the client to add HR headcount.
HR Compliance Support
HR compliance support refers to ongoing advisory or managed services that help an organization identify, track, and fulfill its employment law obligations, including wage-and-hour rules, leave laws, anti-discrimination requirements, and recordkeeping mandates. Compliance support engagements typically include a regulatory calendar, policy templates, and a named advisor for escalation. The distinction from HR compliance outsourcing above is mostly one of depth: compliance support can be advisory-only, while outsourcing implies the provider takes on documented remediation work as well. A company that just needs someone to flag an upcoming leave-law change and hand over an updated policy template is buying compliance support; a company that also needs someone to investigate and document a specific complaint is buying compliance outsourcing.
HR Advisory Services
HR advisory services refers to project-based or retainer-based expert guidance on HR strategy, policy design, compliance, and organizational structure, delivered by an external HR consultancy rather than a managed-service or outsourced-operations provider. Advisory engagements are typically scoped by deliverable, such as an employee handbook or a compensation framework, or by retainer hours, not by headcount or payroll volume. A company preparing for its first multi-state expansion might bring in HR advisory services for a focused project, updating its handbook and compensation bands for the new states, without asking the advisor to take on any ongoing execution. This is the delivery model to reach for when the need is a decision or a document, not ongoing execution.
HR Consulting Services
HR consulting services refers to expert professional services, provided by an external firm or independent consultant, that assess, design, or improve an organization's HR programs, policies, processes, or technology, typically on a project or engagement basis. HR consulting engagements commonly cover compensation benchmarking, HRIS selection, organizational design, and HR audit remediation. An HR audit remediation engagement, for example, is typically scoped, priced, and closed out as a single project rather than renewed indefinitely, which is the consulting pattern as opposed to the advisory pattern above. HR advisory services and HR consulting services are close enough in meaning that the two terms are often used interchangeably in practice; where a distinction is drawn, advisory tends to describe ongoing retainer relationships and consulting tends to describe defined-scope projects.
Service Infrastructure
HR Service Center
An HR service center is a centralized function, staffed, technology-enabled, or both, that handles employee inquiries, HR transactions, and tier-1 support requests, freeing HR business partners and specialists to focus on strategic and complex work. HR service centers typically operate a tiered model:
- Tier 0, self-service
- Tier 1, service center agents
- Tier 2, HR generalists
- Tier 3, specialist or legal escalation
A company doesn't need a dedicated service-center team to get this structure; AsureCentral's self-service portal covers tier 0 directly, and a company can layer AsureWorks or Asure HR Compliance on top for the tiers above it rather than building a service center from scratch.
Managed HR Services
Managed HR services refers to an ongoing, subscription-based engagement in which an external provider assumes operational responsibility for one or more HR functions, such as payroll, benefits, or compliance, under defined service levels, as distinct from project-based HR consulting. Managed HR services contracts typically include a dedicated point of contact, a defined response expectation, and pricing scaled to scope rather than a flat per-employee rate. A company that hands its payroll processing, tax filing, and routine HR documentation to a managed services provider is buying execution, not just advice, which is the detail that separates managed HR services from the advisory and consulting models above. AsureWorks is Asure's managed HR services offering, priced by custom quote based on headcount and the specific scope of work handed off, since a fixed per-employee number rarely reflects what a specific company's actual module mix ends up costing.
HRIS (Human Resource Information System)
An HRIS (human resource information system) is a software platform that centralizes employee data, automates HR transactions, including payroll processing, benefits enrollment, and time tracking, and provides reporting and compliance documentation for the HR function. AsureCentral is one entry in this category: payroll, HR, tax, benefits, time, and recruiting run on one connected system under a single login, with shared data and role-based access across every function, a claim that depends on the platform's underlying architecture rather than on integrations layered together after the fact. Rippling, Gusto, BambooHR, and Workday are other platforms growth-stage B2B companies commonly evaluate, each with different payroll, compliance, and integration capabilities and each suited to a different combination of headcount, geography, and existing tech stack. The distinction matters most at the moment a company adds its third or fourth HR-adjacent tool and discovers each one needs its own login and its own reconciliation against payroll.
HR Business Partner (HRBP)
An HR business partner (HRBP) is an HR professional embedded within or aligned to a specific business unit who translates organizational strategy into people programs, including workforce planning, performance management, and employee relations, rather than handling transactional HR administration. The HRBP role traces to Dave Ulrich's HR Champion model, first published in the mid-1990s, which separated strategic partnering from transactional HR service delivery, the same underlying split this glossary's Foundational Concepts section describes as strategic versus operational versus administrative scope. A growth-stage company that can't yet justify a full-time HRBP hire can access comparable strategic guidance through Asure HR Compliance's advisory tiers instead.
How These Terms Relate
Every HR services engagement begins with a scope decision, which functions belong in-house and which to contract out, and that decision determines which delivery model applies. In-house HR and shared services HR sit at one end of the spectrum; HR outsourcing, HR BPO, PEO, and EOR arrangements sit at the other, each differing in how much legal employer responsibility transfers to the provider. Co-employment and employer-of-record structures are the legal mechanisms that make outsourced arrangements possible, and the presence or absence of co-employment is the single clearest way to tell a PEO apart from every other outsourced model in this glossary. Compliance support and HR advisory services layer on top of any delivery model, providing the specialist guidance that growth-stage B2B companies need as they expand across jurisdictions. The service infrastructure, HRIS, HR service centers, and self-service tools, is what makes any model operationally executable at scale. Managed HR services and HRaaS are the subscription-based wrappers that bundle infrastructure, operations, and advisory into a single engagement.
The scope decision and the delivery-model decision are also separable rather than sequential in practice, a distinction worth holding onto because most vendor conversations collapse them into one choice. AsureCentral and AsureWorks running on the same underlying platform is a useful illustration of why that separation matters: a company can document its function scope, decide it wants to run payroll and HR itself for now, and change that answer later to hand execution to Asure specialists, without redoing the scope work or migrating to a new system in the process. The vocabulary in this glossary exists to make that kind of decision explicit instead of accidental.
Learn More
This glossary covers the vocabulary of HR service delivery, the terms that separate an HRIS from an HRO, a PEO from an EOR, and advisory from outsourcing. The next step is applying it: scoping which of the six HR function families your team already handles well, mapping that scope against the delivery models above, and choosing the model that fits your headcount, compliance exposure, and internal capacity today, not the one you'll have outgrown within a year. Asure is built to support that decision at every point on the spectrum it describes. AsureCentral gives growth-stage companies one connected system for payroll, HR, tax, benefits, time, and recruiting when the right call is to run the function themselves, and AsureWorks gives them Asure specialists running payroll and day-to-day HR administration, without co-employment and without giving up employer-of-record status, when the right call is to hand off execution instead. Talk to Asure about mapping your HR function scope and matching it to a delivery model, whether that ends up being AsureCentral, AsureWorks, or a hybrid of the two.
