How to build a data room for your raise (the lean version)

An investor emails: "This is looking good — can you send over your data room?" And just like that, a warm conversation turns into homework you don't know how to do.

The phrase "data room" sounds corporate and intimidating, like something that needs a lawyer and a fortnight. For a giant company doing a £200m deal, maybe. For a pre-seed or seed founder, it's much simpler than that — and building one badly (or slowly) is one of the easiest ways to lose deal momentum.

This is the lean version: what a data room actually is, exactly what to put in it, and how to produce the financial bits in clicks rather than days. No legal team, no panic.

What a data room actually is

A data room is just one organised, secure place where you keep the documents an investor needs to do their due diligence — the deep look under the bonnet before they wire money.

Years ago it was a literal locked room full of files. Today it's a shared folder (Google Drive, Notion, Dropbox, or a dedicated tool) with sensible sub-folders and controlled access. That's it. The "room" is a folder. The skill isn't building it — it's having the contents ready and correct.

Two things make a data room good: it's complete (the investor doesn't have to keep asking for more), and it's trustworthy (the numbers inside are reconciled and tie together). Get those right and due diligence is fast. Get them wrong and it drags for weeks while everyone chases missing files and reconciles conflicting numbers.

The hard way founders do this today

Here's how the data-room scramble usually goes, and why it hurts.

The investor asks. You start a folder. You go hunting: incorporation documents in your email somewhere, the cap table in a spreadsheet a co-founder last edited months ago, the P&L which your accountant has but it's from the last year-end, journals you've never actually exported. You stitch together a "management accounts" tab by hand. Halfway through, you realise the revenue figure in your deck doesn't match the one in your accounting tool, so you spend an evening working out which is right.

Every one of those steps is slow, and every one introduces a chance to send something wrong — which is far worse than sending it late. An investor who spots a number that doesn't tie out starts wondering what else doesn't tie out. The scramble itself becomes the signal.

The lean data room checklist

You don't need everything a big-company data room has. You need the things a seed investor actually opens. Organise it into four simple folders.

1. Company and legal.

• Certificate of incorporation
• Articles of association
• Any shareholder agreements
• Key contracts (big customers, key suppliers, IP assignments)
• Founder service agreements / employment contracts

2. Ownership.

• Your cap table — the list of who owns what slice of the company, including options, safes and convertibles
• Share certificates and any SH01 filings (the Companies House form that confirms shares were issued)
• SEIS/EIS advance assurance or certificates, if relevant

3. Financials.

• Current profit and loss and balance sheet (management accounts)
• Last filed accounts, if you have them
• Your underlying journals — the transaction-level record behind the statements
• A simple forward plan / financial model
• Bank statements for the recent period

4. Metrics and traction.

• Your key metrics (revenue/MRR, growth, retention, runway, burn)
• A short summary of traction to date

That's a complete lean data room. Notice how much of section 2, 3 and 4 comes straight out of your bookkeeping — if your bookkeeping is clean.

The bit that decides everything: are the numbers reconciled?

You can have every folder perfectly organised and still fail due diligence on one question: are these numbers actually right?

Reconciled means your records have been checked against your real bank statements, line by line, so every figure is provably true rather than hopeful. When your financials are reconciled, an investor's accountant can tie your P&L to your bank to your journals and everything agrees — and due diligence flies. When they're not, every small discrepancy becomes a query, and queries become delays, and delays kill momentum. What is reconciliation in accounting? →

This is the real work behind a good data room. The folder is the easy part. The reconciled numbers inside it are the moat.

How it works in Ledgers

In Ledgers, the financial half of your data room isn't a project — it's already done, because your books are reconciled continuously as money moves.

When an investor asks for due diligence, you produce DD-ready exports in a click: your cap table as a clean CSV, and a full journal export — the transaction-level record investors and their accountants want to see. Both come straight from your live, reconciled ledger, so they tie out to your P&L, your balance sheet and your bank. There's no stitching, no "which version is right," no evening lost to reconciliation.

And because every number carries a Reconciled badge backed by an explainable, event-sourced ledger where nothing disappears, when their accountant asks "can you show us how this figure was built?", the answer is right there. For the live, ongoing view, you can give investors scoped access through the Investor Room rather than emailing static files — so they see current numbers, not a snapshot that's already stale.

You spend your time organising the legal folder. The financials — the part that usually causes the pain — hand themselves over.

Ready to make due diligence painless? In Ledgers, your cap table and journals export in a click as DD-ready files — straight from your reconciled books, so they always tie out. See your numbers without learning accounting → start free.

First, know what they're checking for: What investors actually want to see before they invest →

Then get the books themselves ready: Get your startup financials investor-ready in a weekend →

Frequently asked questions

What should be in a startup data room?

For a seed raise: company and legal documents (incorporation, articles, key contracts), ownership (cap table, share filings, SEIS/EIS paperwork), financials (current P&L and balance sheet, journals, a forward plan, bank statements) and your key metrics. Keep it lean — only what investors actually open.

How long does it take to build a data room?

The folder structure takes an afternoon. The slow part is producing accurate financials and a clean cap table — which can take weeks if your books aren't reconciled, or minutes if they are and you can export them directly.

Do I need a lawyer to set up a data room?

No. A founder can set up a lean data room themselves with a shared folder and the right documents. A lawyer helps with the legal agreements that go *inside* it, but the room itself is just organisation.

What's the difference between a data room and a pitch deck?

A pitch deck sells the vision and gets the meeting. A data room is the evidence — the documents and numbers an investor checks during due diligence before committing. The deck wins interest; the data room survives scrutiny.

See your numbers without learning accounting

Ledgers does the bookkeeping — bank feeds, VAT, year-end — and keeps your accountant in the loop. Free for pre-revenue founders.

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