APIs · MCP · White-label
Build your own agentic payroll system and sell it to your clients
US & Canadian payroll APIs, MCP tools, employee portals, and white-label branding. You own the client relationship and pricing; we run the compliance engine behind the scenes.
Ready to launch?
Create a developer account ($49/mo + included monthly API credits) or sign in to manage keys, billing, and provisioned companies. See pricing.
Create developer accountSign inView pricing — no signup requiredBrowse API docs — no signup requiredWhite-label solutions
Ship payroll under your brand — we white-label it for you
For software platforms and accounting firms: keep your logo, domain, and client pricing. We host the admin, employee portal, tax engine, and MCP/REST APIs. Prefer not to build? We can design and launch a branded stack on your behalf.
- Custom branding, domains, and firm Spaces
- Multi-tenant companies with scoped API keys
- US & Canada compliance, pay runs, and tax forms included
Revenue opportunity
See how much you can make building & selling payroll
Use Payroll Shack APIs as the engine behind your own branded payroll product — then charge your client firms per employee, per month. Adjust the sliders to match your practice.
Accounting practices, PEOs, or vertical SaaS customers
Typical white-label payroll: $6–$15 PEPM
Gross monthly revenue
$4,860
540 employees × $9/mo
Gross annual revenue
$58,320
Before your delivery & support costs
Your platform cost with Payroll Shack: about $4/mo subscription plus usage-based API credits (often well under 1% of revenue at this scale).
Illustrative only — not tax or financial advice. Your pricing, mix, and costs will vary.
From accounting firms
Firms using Payroll Shack to grow payroll revenue
CPAs, bookkeepers, and advisory practices use our APIs — or our build-for-you service — to offer payroll under their own brand.
We wanted payroll in our stack without hiring engineers. Payroll Shack let us launch a branded offering in weeks — our clients see our firm, not a third-party logo.
The API-first model fits how we work: we onboard firms, set PEPM pricing, and the compliance engine stays current. Support questions dropped once pay runs were on the platform.
Half our practice is bookkeeping, half is advisory. Selling payroll per employee finally made the economics work — and when we needed help with integration, their team built the first version with us.