How to Prepare Your Startup for
Series A Due Diligence
Most founders don’t think about Series A due diligence until an investor asks for something they don’t have. By then, gaps that take weeks to close are being exposed in real time. Here’s how to get your house in order before the process starts — so you close faster and with fewer surprises.
- What Series A due diligence actually covers
- The data room — what to build and how
- Financial hygiene before the process starts
- The metrics investors will stress-test
- Legal and HR gaps that slow deals
- How to prepare your team for investor conversations
- The due diligence timeline — what to expect
What Series A Due Diligence Actually Covers
Series A diligence is broader and deeper than seed. At seed, investors bet on the founder and the idea. At Series A, they’re betting on a business — which means they want to verify that what you’ve told them is real, understand the risks in detail, and stress-test your assumptions before writing a cheque that’s usually 10-15x larger than seed.
Diligence typically covers five areas: financial (your numbers, unit economics, burn, runway), commercial (your customers, retention, sales process, pipeline), product (your tech, architecture, roadmap, IP), team (your people, equity, employment contracts, key person risk), and legal (corporate structure, cap table, IP ownership, any existing litigation or regulatory exposure).
The founders who close fastest are the ones who can answer every question with a document rather than a conversation. Documents are instant. Conversations require scheduling. Every “we’ll get back to you on that” adds days to your close.
Start building your data room the day you decide to raise — not the day an investor asks for it. A data room that takes two weeks to assemble signals an organisation that doesn’t have a handle on its own business.
The Data Room — What to Build and How
Your data room is a shared folder (Google Drive or Notion) containing every document an investor might need. Organise it by category, name files clearly, and make sure everything is current before you share access.
Financials: Last 24 months of P&L, balance sheet, and cash flow statement. A financial model with assumptions clearly documented. Current MRR/ARR with month-by-month breakdown. Unit economics — CAC, LTV, payback period. Burn rate and runway calculation.
Commercial: Customer list with ARR per customer (anonymised if needed). Churn data — logo churn and revenue churn by cohort. NPS or customer satisfaction data if you have it. Sales pipeline by stage. Top 3-5 customer contracts.
Product: Product roadmap. Tech stack overview. Any IP filings or proprietary technology documentation. Security and compliance posture (especially relevant for HR SaaS).
Team: Org chart. Employment contracts for key hires. Equity schedule and cap table (use Carta or equivalent). Advisor agreements.
Legal: Certificate of incorporation. All previous funding documents (SAFEs, convertible notes, equity rounds). IP assignment agreements for all founders and early employees. Any NDAs with customers that restrict disclosure.
“I’m preparing for a Series A raise. Help me audit my data room readiness. Here’s what I currently have: [list what you have]. Here’s what I know I’m missing: [list gaps]. For each gap: (1) How critical is it — will investors block on this or just note it? (2) How long should it realistically take to close? (3) What’s the minimum viable version I can produce quickly if the full version takes too long? Prioritise by what investors will ask for first.”
Financial Hygiene Before the Process Starts
The financial questions that most often slow Series A deals are not about the numbers themselves — they’re about the quality and consistency of how the numbers are tracked and reported.
Before you enter a process: make sure your books are reconciled and up to date (if you’ve been doing this quarterly, switch to monthly now), ensure your revenue recognition is consistent (particularly important for SaaS companies where multi-year contracts can be recognised differently), and confirm your MRR calculation methodology is defensible and documented.
The most common financial gap at Series A: founders who track MRR in a spreadsheet that doesn’t match their accounting system. These discrepancies are explainable but require time to reconcile — time you don’t want to spend mid-diligence.
The Metrics Investors Will Stress-Test
For a B2B SaaS company at Series A, expect deep scrutiny on five metrics in particular.
Net Revenue Retention (NRR). This is the single most important metric for a SaaS business at Series A. Above 120% signals a business that grows without new customer acquisition. Below 90% raises serious questions about product-market fit.
CAC Payback Period. How many months of gross margin to recover the cost of acquiring a customer. Under 12 months is strong. 18-24 months is acceptable with a clear path to improvement. Above 24 months requires a compelling explanation.
Gross Margin. For SaaS, 70%+ is expected. If you’re below this, be ready with a clear explanation and a path to improvement.
Revenue Growth Rate. Series A investors want to see 3x year-over-year at minimum, with a clear explanation of what drove it and why it’s repeatable.
Logo Churn. How many customers cancelled in the last 12 months. Even one or two churned customers at early stage gets scrutinised — be ready with the specific reason for each churn.
“I’m about to enter Series A diligence. Here are my key metrics: MRR [X], growth rate [Y], NRR [Z], CAC [A], LTV [B], gross margin [C], churn [D]. Help me: (1) Identify which metrics investors will push hardest on and why, (2) Prepare honest, specific explanations for any metrics that are below benchmark, (3) Frame the metrics that are strong in a way that’s compelling without overstating, (4) Anticipate the follow-up questions for each metric and prepare clear answers.”
Legal and HR Gaps That Slow Deals
The legal and HR issues that most commonly slow or kill Series A deals are almost always preventable — they just require attention before the process starts rather than during it.
IP assignment gaps. Every person who has contributed to your product needs a signed IP assignment agreement. This includes founders, contractors, and early employees. Missing agreements on any contributor to core IP is a deal-stopper that requires legal remediation.
Messy cap table. Unconverted SAFEs, options that were promised but never documented, shares issued without board approval — these create legal work mid-diligence that slows everything down. Clean this up before you raise.
Employment contracts. Every employee should have a signed contract with appropriate IP assignment, confidentiality, and non-solicitation clauses. Missing contracts on key employees create risk flags.
Customer contract consistency. If your contracts with different customers have materially different terms — pricing, liability, IP ownership — investors will want to understand the variation. Be ready with an explanation.
How to Prepare Your Team for Investor Conversations
Series A investors will often want to talk to your leadership team, not just the founder. These conversations aren’t optional — they’re part of diligence. How your team presents directly affects the outcome.
Brief your team before any investor conversations: what the company’s narrative is, what metrics to be ready to discuss, what questions are likely, and what questions to redirect to the founder. The last point matters — team members who speculate on strategic decisions they don’t own create confusion that has to be cleaned up later.
The most important thing to convey in these conversations: your team knows their domain deeply, they’re aligned on company direction, and they’re honest about what they know and don’t know. Investors are pattern-matching for team quality, not just answers.
The Due Diligence Timeline — What to Expect
Series A diligence typically runs 4-8 weeks from term sheet to close. The variables that make it longer: incomplete data room, legal issues that require remediation, investor committee processes that require multiple approvals, and external factors like market conditions or competing deals.
The variables that make it shorter: a complete data room from day one, clean legal and financial records, an investor who has done deals at your stage before and moves efficiently, and a founder who responds to requests same-day.
Maintain momentum. Every day of diligence is a day you’re not building the business. Treat investor requests as the highest priority in your week during the process — delays from your side compound.
“Create a diligence tracker for a Series A raise. I want to track: every document requested by investors, who owns producing it on my side, the current status, any blockers, and the date it was shared. The tracker should cover the 5 diligence categories (financial, commercial, product, team, legal) and be formatted as a simple table I can maintain in Notion or Google Sheets. Include the 20 most commonly requested items across each category.”
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