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Fundraising · Diligence

How to Handle Investor Diligence

What investors ask for, how to prep a data room, reference calls, and the diligence questions you need answers to before they're asked.
9 min readUpdated Apr 30, 2026

Diligence is the phase where deals quietly die. Not from a single big red flag, but from the accumulation of small inconsistencies, slow responses, and unanswered follow-up questions. The fix is preparation: most diligence outcomes are decided before the first request lands.

What's actually in scope

Investors do four flavors of diligence in parallel:

  1. Commercial diligence. Customer interviews, market sizing validation, competitive positioning.
  2. Financial diligence. Revenue verification, unit economics, hiring plan, fundraising history.
  3. Technical / product diligence. Architecture review, security posture, hiring needs, code quality (less common at seed).
  4. Reference diligence. Calls with customers, former colleagues, and sometimes your former managers.

At seed, expect light versions of all four. At Series A, expect deep versions of all four. At Series B+, add extensive financial audits and legal reviews.

The data room — what to include

Most investors expect a defined structure. Use Notion, Google Drive, Docsend, or a dedicated data room product. Folders to prepare:

  • 1. Company. Cap table, incorporation docs, shareholder agreements, board materials.
  • 2. Financials. Historical P&L (monthly), balance sheet, financial model, current burn / runway, fundraising history, existing investor list.
  • 3. Customers. Customer list with ACVs, top accounts P&L, retention curves, churn analysis, customer interview notes.
  • 4. Market. TAM/SAM/SOM analysis, competitive matrix, market reports, customer ICP definition.
  • 5. Product. Product roadmap, architecture overview, security/compliance posture, key tech decisions.
  • 6. Team. Org chart, hiring plan, comp bands, key hire bios, team retention.
  • 7. Legal. Standard agreements (employment, NDAs, customer terms), any pending or past disputes.
  • 8. Sales / GTM. Pipeline snapshot, sales playbook, GTM motion documentation, channel strategy.

Lock down access. The closing investor gets full access; competing investors get a reduced version. Trade-secret information goes password-protected.

The financial questions you need clean answers to

Investors will probe these specifically. Have them ready in your head, your model, and your data room:

  • Net new MRR by month for the last 12 months. Is growth accelerating or decelerating?
  • Cohort retention curves. Logo and dollar retention across 6-month cohorts. The single best signal for SaaS health.
  • CAC payback period. Use our CAC/LTV Calculator to have these numbers ready.
  • Burn multiple. Net burn ÷ net new ARR. Below 1 is excellent; 1-2 is good; above 2 raises questions.
  • Magic number. (Quarterly net new ARR × 4) ÷ quarterly S&M spend. Above 1 is healthy.

Reference calls — the hidden veto point

Investors take 4-8 reference calls before closing a round. The mix:

  • Customer references. 3-5 paying customers who can speak to your product and team. Pick a mix: power users, recent customers, and one who churned (yes, really — investors trust founders who can show they understand why customers leave).
  • Off-list references. Investors will call people you didn't list. Former colleagues, your previous managers, sometimes competitors. You can't control these, but you should know roughly what each will say.
  • Technical references. If the lead investor uses a technical advisor, expect 1-2 architecture deep-dives.

Pre-brief every on-list reference. A short email works: "Acme Capital may call you about us. Quick context on the round we're raising and what they'll likely ask. Anything you'd love them to mention: X, Y, Z."

Most reference call disasters come from references being unprepared, not unwilling.

Common diligence red flags

  • Slow response times.Taking 5 days to answer a financial question signals disorganization. Aim for <24 hours.
  • Inconsistent numbers. The deck says $50K MRR, the model says $48K, the customer list adds to $52K. Reconcile before sharing.
  • Customer concentration. 50%+ revenue from one customer is concerning — be ready to explain how you mitigate it.
  • Founder team gaps. No CTO at a tech company, no GTM lead at a sales-led company. Have a credible plan for closing the gap.
  • Legal surprises. Old IP issues, unsigned founder agreements, missing equity documentation. Audit and clean up before diligence starts.

How to keep momentum

Diligence has natural drift. The fix:

  • Set a target close date. "We'd like to close by X." Investors accept reasonable timelines but they don't volunteer them.
  • Single point of contact. One investor person owns your diligence (usually the principal or partner). Drive everything through them.
  • Weekly status check. Email Friday: "What's outstanding? What's next?" Forces forward motion and surfaces problems early.
  • Other term sheets. Even one competitive process accelerates diligence dramatically.

Pair this guide with our financial model templates for the analytical artifacts investors will probe, and the term sheet negotiation guide for what comes after diligence closes.

FAQ

When does diligence officially start?+
After a partner meeting and a verbal indication of interest. Sending a data room before then is premature — you waste your prep, they may not have a serious intent.
How long should diligence take?+
2-4 weeks at Series A. Faster (1-2 weeks) at seed. If it's dragging on past 4 weeks without a clear close, ask directly what's blocking.
What goes in a data room?+
Financials, customer data, team info, legal docs, market analysis, technology architecture. See full checklist below — most investors expect a defined structure.
Should I share customer logos?+
In an early-stage data room: yes, with reasonable redactions if customers haven't agreed to be named publicly. Deeply confidential customer info goes in a 'restricted' folder shared only with the closing investor.
How do I handle a reference call gone wrong?+
Pre-brief every reference. Tell them the kind of fund calling, what they'll likely ask, and what you'd love them to mention. Most reference call issues are prep problems, not relationship problems.