How to Invoice When Working Through an Agency

Subcontracting through an agency changes who you invoice and what details matter. Here's how to handle it correctly.

Invoice the agency, not the end client

In most subcontracting arrangements, your contractual relationship is with the agency, so your invoice should go to them, referencing their agreed rate — not the end client's project details.

Follow the agency's specific format requirements

Agencies often have particular invoicing requirements — reference numbers, submission portals, specific formats — confirm and follow these closely to avoid payment delays.

Keep end-client details general

Depending on your confidentiality agreement, avoid including sensitive end-client details on invoices beyond what's necessary for the agency to process payment.

Understand the agency's payment terms

Agency payment terms can sometimes be longer than direct client work (Net 30-60 is common) — factor this into your cash flow expectations.

Track your hours or deliverables independently

Keep your own records of work completed, separate from whatever the agency tracks, in case of any discrepancy in what's invoiced versus what's paid.

The takeaway

Agency subcontracting invoicing is simpler in one sense (one consistent client) but requires strict adherence to their specific process to avoid payment delays.