Building In-House Payroll vs. Referring It Out: Which Is Right for Your Firm?

Sooner or later, most growing accounting firms hit the same fork in the road. Your clients want payroll, and you have to decide whether to build the capability inside your firm or send it to an outside partner. Both are legitimate choices, and firms succeed on both paths. What gets expensive is choosing one path by default instead of on purpose.

At Whirks, we’ve spent years working with accounting firms on exactly this decision, and we’ve seen firms succeed and stumble on each path. This article lays out the two paths, the honest trade-offs of each, and a straightforward way to tell which one fits your firm.

The Short Version  
Growing accounting firms usually face a choice: Build payroll in-house or refer it out to a partner. Building means people, technology, and compliance liability, in exchange for full control and all the revenue. Referring means a hands-off revenue share, with less control and some reputational exposure. There's also a middle path, a Network partnership, where you run payroll under your own brand on a partner's platform. The right choice depends on your capacity, your appetite for risk, and how much control you want, not on whichever option shows the biggest number.

The Core Decision: Build Payroll or Refer It Out?

When you strip away the details, the decision to offer payroll comes down to two options. You can build payroll in-house, investing in the people, technology, and processes to run it yourself, and keep the revenue and the control that come with it. Or you can refer payroll out to a partner who runs it while you stay focused on accounting, earning a share of the revenue without the operational load.

Neither option is automatically better. The right answer depends on your capacity, your appetite for compliance risk, how much control you want over the client experience, and how you want the economics to work. The rest of this article walks each path, then compares them side by side.

What Building Payroll In-House Actually Involves

In effect, building means becoming a small payroll operation. You take on the technology, at least one or two dedicated people, and the compliance responsibility that comes with running tax filings on other businesses’ behalf. It also takes time to stand up, usually months before you run your first client. In exchange, you keep full control and all of the revenue.

The numbers are important here, and they amount to more than the cost of a software subscription. Before you commit, it’s worth reading what it actually costs to add payroll to your firm and pressure-testing your timing against the signs your firm is genuinely ready to add payroll. Those two articles cover the build path in the depth it deserves.

What Referring Payroll Out Actually Involves

Referring means handing the payroll work to a partner and staying out of daily operations. You keep your focus on accounting, carry none of the processing cost, and earn a share of the revenue for clients you send to the referral partner. The trade-off is control. Someone else now shapes your client’s payroll experience, and that experience reflects back on you.

That reputational exposure is the real thing to manage, which is why it’s worth understanding the risks of referring your clients to a payroll company and what to verify before you sign a referral agreement. Both articles together give you a more complete picture of the referral path.

Building vs. Referring Payroll: A Side-by-Side Comparison

Two firms can look at the same choice and land in different places, because they weight these factors differently. Here’s how building and referring stack up on the things that tend to drive the decision.

The revenue line is where firms most often over-simplify. A bigger share of a service you run yourself isn’t automatically more money once you subtract the cost of running it, and referral income can compound over the life of each client. If the economics are central to your decision, we break down how much a firm can actually earn by referring payroll.

Which Payroll Path Fits Your Firm?

The decision gets easier when you match the path to your firm’s reality rather than chasing the highest potential payout.

Building tends to make sense when you have or want dedicated payroll capacity, you value complete control over the client experience, and you’re willing to invest money and time up front to own the revenue long term. 

Referring usually makes sense when your focus stays on accounting, you want predictable economics without operational risk, and you’d rather offer payroll than become a payroll company.

The Middle Path: Running Payroll With a Partner's Support

The choice isn't strictly build-everything-from-scratch or refer-everything-out. There's a middle path where you still run payroll and own the client relationship, but you lean on a partner's technology, compliance, and support instead of building all the infrastructure yourself. You're still committing real staff and operational effort, but you skip the cost and years of building the platform from the ground up.

That’s the idea behind a Network partnership with Whirks, and it changes the math for firms that want control without the full build. If that middle ground sounds right, it’s worth knowing who the Network model actually fits and how building on your own software compares to a supported partnership before you assume the decision is all-or-nothing.

Choosing the Right Payroll Path for Your Firm

Both paths are real, and firms thrive on each. What separates a good outcome from a costly one is choosing deliberately, with clear eyes on the trade-offs rather than the single number that first caught your attention.

The decision comes down to how much control you want, how much risk and effort you’re willing to carry, and how you want the economics to work. 

Build if you want to own the operation and the revenue and you’re ready to invest. Refer if you’d rather stay focused on accounting and earn without the operational load. And remember, there’s also a middle path if neither the build-your-own nor refer-it-all-out models sound right.

We’ve helped accounting firms go in every one of these directions, and we care more about you choosing the right one than about which one it is. If you're leaning toward working with a partner rather than building entirely on your own, the difference between a Network Partnership and a Referral Partnership is where to turn that direction into a specific plan.