Site finance

Late sponsor payments: how research sites protect cash flow

By TrialNotice · Updated
Overhead view of a desk with a printed proposal, calculator, navy envelopes, and a coffee cup
Short answerLate sponsor payments are nearly universal: in SCRS's survey, 23% of sites reported that 31% to 40% of their invoices were more than 90 days overdue, and 34% saw operating capital decline. Sites protect cash flow by negotiating monthly payments and lower holdbacks, invoicing promptly, tracking every receivable, escalating early, and keeping enough working capital to ride out delays.

How bad is the problem?

  • Nearly all sites experience late payments; 23% reported 31% to 40% of invoices more than 90 days overdue, and 34% saw operating capital decline (SCRS via Clinical Leader).
  • Sites report not receiving monthly payments even when monthly terms were agreed (SCRS 2023).
  • SCRS and Greenphire identified four recurring problems: limited operating cash, manual invoicing, untimely payment frequency, and lack of financial transparency (SCRS).
  • Each protocol amendment delays a study by about three months on average, which also delays payments (Bourne Partners, citing Tufts CSDD).

Which contract terms help most?

  1. Monthly payments. In 2023, 51% of sites had monthly agreements (IntuitionLabs, citing SCRS). Earlier SCRS data showed 77% preferred monthly but only 39% had it (ACRP, 2019); you won't get it unless you ask.
  2. Lower holdback. The most common in 2023 was 10% to 14% (IntuitionLabs, citing SCRS); Penn caps it at 10% (Penn Medicine).
  3. Defined payment triggers and timelines in writing.
  4. A nonrefundable startup fee paid at activation.

How do you chase overdue invoices?

  • Invoice the day an invoiceable occurs, using the sponsor's template if one exists (ACRP).
  • Register for and check sponsor payment portals regularly (ACRP).
  • Keep a receivables log by sponsor and age, and escalate at 60 days, not 120.
  • Raise payment performance with sponsor leadership during relationship reviews.

How do you survive the gap?

Keep working capital: sites at SCRS recommended at least three months on hand (Bourne Partners). See how much runway a site needs.

What makes cash flow predictable?

Payments follow completed visits, so cash flow follows enrollment. A site enrolling steadily has a steady stream of invoiceable visits; a site with one or two patients per study lives invoice to invoice. Predictable patient flow, including referrals from local physicians, is a cash flow strategy.

Get your study in front of the right local physicians

TrialNotice builds a physician referral pipeline around one active study. We identify relevant local physicians within driving distance of your site, send study aligned direct mail, follow up by email and LinkedIn, track engagement with recipient level QR codes, and route warm responses into your site team's workflow.

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Sources

  1. Clinical Leader, "The Results Are In: Survey Reveals Barriers and Opportunities In Site Sustainability"
  2. Society for Clinical Research Sites, 2023 Site Landscape Survey White Paper
  3. IntuitionLabs, "Clinical Trial Site Payment Benchmarks 2026" (citing the SCRS 2023 Site Landscape Survey)
  4. ACRP, "Protecting Cash Flow: How Site Investigators and Staff Can Keep Site Payments on Track" (2019)
  5. Society for Clinical Research Sites, White Papers and Guides
  6. Bourne Partners, "Update on the Fundamentals of Clinical Trial Sites" (SCRS Global Site Solutions Summit takeaways, October 2025)
  7. University of Pennsylvania Perelman School of Medicine, Budget Preparation and Development

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