When accounting firms look for a payroll solution to recommend to their clients, OnPay is frequently near the top of the list. It’s affordable, transparent, and built with a clean accountant portal that makes multi-client payroll management straightforward.

But the AccuPay vs. OnPay comparison raises a more fundamental question — and it has nothing to do with which software has better features. It’s this: should your accounting firm be managing payroll operations at all?

These are two fundamentally different models. The right choice depends on whether your firm wants to do payroll work or benefit from payroll revenue.

What Is OnPay?

OnPay is a software-as-a-service payroll platform founded in Georgia that has become popular with small businesses and the accounting firms that serve them. It uses a single pricing tier — $49 per month plus $6 per employee — with all features included and no add-on charges. That straightforward pricing is one of OnPay’s strongest selling points.

OnPay’s accountant partner program offers firms free payroll for their own practice, discounts or revenue-sharing opportunities, free CPE credits, and marketing resources. The platform provides a multi-client dashboard so CPAs can manage payroll for several clients from a single login. Features include payroll processing, automated federal and state tax filing, benefits administration (with licensed broker support), onboarding tools, and an employee self-service portal. It integrates with QuickBooks Online and Xero, and supports payroll across all 50 states.

For accountants who want to actively manage payroll as a service line within their firm, OnPay provides a capable, affordable tool. The key word, though, is “manage” — with OnPay, the CPA is the one running payroll, reviewing calculations, and bearing operational responsibility for accuracy and compliance.

What Is AccuPay Systems?

AccuPay Systems is an independent, full-service payroll and HR service bureau headquartered in Temecula, California. Founded in 2006, AccuPay has been in operation for nearly two decades and still serves its very first client — a track record that speaks to the best client retention in the industry.

AccuPay runs on the iSolved HCM platform, which serves 189,000+ businesses nationwide. The platform includes 16 integrated modules covering payroll, HR, benefits, talent acquisition, performance management, employee engagement, predictive analytics, and more — with documented customer outcomes of 330% ROI and time-to-value in under six months.

AccuPay offers CPA firms a referral and white-label partnership program built on a different principle than OnPay’s model. Rather than giving CPAs software to manage payroll themselves, AccuPay handles all payroll operations on behalf of the CPA’s clients. The CPA earns recurring revenue, maintains visibility through a partner dashboard, and never has to process a single payroll run.

AccuPay is also a certified Minority Business Enterprise (MBE) with a pending 8(a) Small Disadvantaged Business certification.

The Bureau Partnership Model vs. the Accountant Software Model

This distinction is the core of every CPA firm’s decision.

The OnPay Model: The CPA Does the Work

With OnPay, the accounting firm adds payroll as a service line by using OnPay’s software to process client payrolls. A CPA or staff member enters hours, reviews calculations, approves payroll runs, and monitors tax filings. The firm is operationally responsible for the accuracy and timeliness of every client’s payroll.

This model works if the firm has dedicated payroll staff, wants direct control over every cycle, and is prepared to absorb the liability and time commitment that comes with managing payroll operations across multiple clients.

The AccuPay Model: The CPA Earns Revenue, AccuPay Does the Work

With AccuPay, the CPA refers clients through a partner portal — or offers payroll under a white-label arrangement where AccuPay operates as the powered backend. AccuPay’s team processes payroll, files taxes, manages compliance, and provides direct client support. The CPA earns a competitive recurring revenue share for the life of the account, without performing any payroll operations.

Under the white-label model, the CPA bills the client at their chosen price and AccuPay bills the firm at a preferred wholesale rate. This lets accounting practices bundle payroll into their monthly retainer, increasing firm valuation and client retention — especially valuable for firms building a Client Accounting Services (CAS) practice.

Side-by-Side Comparison

Where OnPay Wins

OnPay has earned its reputation with accounting firms for good reasons.

Where AccuPay Wins

AccuPay’s advantages are most significant for CPA firms that want payroll revenue without payroll work.

CPAs Don’t Manage Payroll Operations

This is the most important difference. With OnPay, the CPA effectively becomes the payroll department for every client they onboard. Every cycle requires attention, every filing requires review, and every error creates liability. With AccuPay, the CPA’s role is to make the introduction — and AccuPay handles everything from that point forward. The CPA earns recurring revenue for the life of the account without processing a single payroll run.

Revenue Without the Operational Burden

AccuPay’s CPA partnership program is designed to create sustainable recurring revenue for accounting firms. Under the referral model, the CPA refers a client and earns a competitive ongoing share. Under the white-label model, the CPA bundles payroll into their monthly retainer at their chosen markup — increasing both revenue and client stickiness. Either way, the revenue scales without adding headcount or operational complexity.

Enterprise HCM Platform, Not Payroll-Only Software

OnPay is a payroll tool with basic HR features. The iSolved HCM platform includes 16 integrated modules covering the full employee lifecycle: payroll, HR, benefits, time and attendance, talent acquisition with access to 6,000+ job boards, onboarding, performance management, employee engagement, learning management, predictive analytics, AI virtual assistant, and more. As CPA clients grow, AccuPay can serve their expanding needs without requiring a platform switch — protecting the CPA’s referral relationship long-term.

California Compliance Expertise

AccuPay’s team brings over 20 years of dedicated California payroll experience, covering SDI, PIT, SUI, ETT, daily overtime, paid sick leave, and CFRA compliance. For CPAs with California-based clients, referring to AccuPay means those clients receive genuine state-specific expertise — not a national platform’s best guess.

The 90-Day Double Money-Back Guarantee

AccuPay backs every new engagement with a 90-Day Double Money-Back Guarantee. When a CPA refers a client to AccuPay, they can do so with full confidence — if the client’s experience isn’t exceptional, AccuPay refunds twice the fees. OnPay offers an error-free tax filing guarantee, but no comparable overall service satisfaction guarantee.

Supplier Diversity Value for Government Contractor Clients

AccuPay’s MBE certification and pending 8(a) Small Disadvantaged Business certification are valuable for CPAs who serve government contractors or businesses with supplier diversity requirements. Referring these clients to AccuPay adds procurement value that OnPay simply cannot provide.

A Partner-First Approach

AccuPay doesn’t upsell clients behind the CPA’s back, doesn’t cross-sell accounting services, and maintains full transparency with the referring firm. The CPA always has visibility into their clients’ data and status through a single sign-on partner dashboard. The referring CPA’s relationship always comes first.

Which Model Is Right for Your Firm?

Frequently Asked Questions