San Diego’s defense and government-contracting base is one of the largest in the country — and the layered structure of prime contractors, subcontractors, and suppliers is exactly where payments get stuck. A sub delivers on schedule, invoices the prime, and then waits behind “pay-when-paid” clauses, modification disputes, and slow flow-downs of federal funds. This guide covers how San Diego subcontractors and suppliers recover unpaid invoices on government-contract work. For the service overview, see Defense & Government Contractor Debt Collection or the main San Diego debt collection hub.
1. Know which non-payment you’re dealing with
Government-contract disputes usually fall into a few buckets: the prime has been paid but hasn’t flowed it down, the prime hasn’t been paid and is leaning on “pay-when-paid,” a change order or scope modification is unresolved, or there’s a genuine performance dispute. Each calls for a different approach, so the first step is sorting which one you actually have — the documentation you’ll need flows from there.
2. Build the file before you escalate
On contract work, your paper trail is your leverage: the subcontract, the PO or task order, signed delivery or acceptance records, approved timesheets, and the invoice history. “Pay-when-paid” is not always “pay-if-never-paid,” and a well-documented file is what lets a firm demand cut through the stall. Get the file clean before the account ages further.
3. Make a firm, documented demand
When routine follow-up stalls, shift tone with a written demand that states the amount owed, the work it covers, the supporting documents, and a firm deadline. For a prime that’s simply slow-walking a payment it has already received, a professional demand from a neutral third party is frequently enough to move it — without damaging your position on the next award.
4. Protect the relationship and the next award
Contractors work in a small, repeat-business world, and that’s precisely why heavy-handed consumer-style tactics backfire. The goal is to recover what you’re owed while keeping you eligible for the next teaming arrangement. A commercial-only agency that understands B2B and contract work escalates firmly but professionally, keeping the door open. More on when the timing is right.
5. Escalate to professional commercial recovery
HP Sears recovers for San Diego subcontractors, suppliers, and service providers on government and defense work — commercial-only, B2B, on contingency — with a structured escalation path up to and including recommended litigation, always with your authorization. Explore the full collections process, how contingency-based collections work, or late-stage collections for accounts that resist resolution.
Frequently asked questions
Can you collect when the prime hides behind “pay-when-paid”?
Often, yes. Those clauses are narrower than many primes imply, and a documented demand plus escalation frequently resolves the balance. Where it doesn’t, we can recommend litigation with your authorization.
Do you work with subcontractors, or only primes?
Both. Most of the stalled invoices on contract work sit at the subcontractor and supplier level, and that’s exactly where we help.
Will pursuing payment hurt future contract opportunities?
Our approach is professional and relationship-preserving by design, aimed at recovering the balance without burning a repeat-business relationship.
Recover your unpaid contract invoices
If your San Diego business is owed on government or defense contract work, HP Sears can help you recover it — professionally and on contingency. Request pricing or contact our team for a free consultation. See also our San Diego collections cost & process guide.