Most guides on starting a staffing agency stop at "find clients and find candidates." That is the visible half. The half that actually decides whether you survive is the back office: how you pay workers, bill clients, fund payroll, and stay compliant from the very first placement.
The front office: clients, candidates, and an ATS
You need clients with roles to fill, a way to source candidates, and a system to manage the pipeline. That system is an ATS, the front-office tool recruiters live in. It finds and places people, but it stops at the placement. Everything after that is operations.
The back-office stack you need from day one
The moment you make a placement, you owe a worker pay and a client an invoice, accurately and on time. That requires a back office that can:
Onboarding and compliance
Collect documents, classify workers, and complete onboarding before day one across every jurisdiction you place in.
Timesheets
Capture and approve hours once, then feed them into both pay and billing.
Payroll calculations
Gross-to-net pay from approved hours; run in Canada, payroll-ready for your provider in the US.
Client billing
Invoices generated from the same approved hours so pay and bill always reconcile.
Margin and commission reporting
Know the profit on every placement, and what each recruiter is owed.
The trap nobody warns you about: cash flow
Here is the math that sinks new agencies: you pay workers weekly, but clients pay invoices in 30 to 60 days. That gap is real money you have to cover before any of it comes back.
This is where payroll funding, also called invoice factoring, comes in, and in staffing the two usually mean the same thing. A funding partner advances most of the invoice, commonly 80% to 95%, within a day or two of you billing the client, then collects from the client and releases the rest minus a fee of roughly 1% to 5%. Approval rests on your clients' credit, not your agency's, which is why it works for a brand-new agency with no track record. That fee comes off your margin, so price it into your rates.
A staffing agency is a margin business with a cash-flow problem. The back office is how you survive both.
Compliance from the first placement
Worker classification and onboarding are not paperwork you tidy up later. Misclassify workers and the exposure stacks up fast, reaching six figures across a roster and multiple tax years. Get onboarding and classification right from day one, across every jurisdiction, and you remove the risk that most often blindsides a young agency.
The number that decides everything: margin
Filling roles feels like winning. Keeping margin is winning. Before you scale, make sure you can see the gross margin on every placement, which means knowing your bill rate and markup and watching it hold as you grow.