Data room index template: a numbering scheme you can copy

Here is the template. Explanation follows.

A data room index is the numbered table of contents for a data room: every folder and document gets a fixed reference number so that everyone in the deal can point to the same file without ambiguity. It doubles as the backbone of the disclosure letter at signing.

Why do numbers matter more than folder names?

Because people cite them. A buyer’s tax adviser writes “see 3.4.2” in a report. The seller’s lawyer references “documents 4.1.1 to 4.1.37” in the disclosure letter. Q&A answers say “the updated lease is now at 7.2.6”. Folder names are for humans browsing; numbers are for precision.

They also make gaps visible. If section 6.2 has no documents, everyone can see that IP assignments are missing, and you would rather spot that before a buyer does.

What rules keep the numbering clean?

A short set of rules, agreed before upload, saves days of confusion.

1. Decimal, not alphabetical. Use 1, 1.1, 1.1.1. Letters run out and mix poorly with numbers.
2. Three levels at most. Section, sub-section, document. If you need a fourth level, the sub-section is too broad; split it.
3. Section 0 for the process. Process letter, rules of the room and this index sit at the top where everyone starts.
4. Never renumber once the room is open. If a document moves or is withdrawn, keep its number and mark it withdrawn. Renumbering breaks every reference already made.
5. Append, do not insert. A late document in sub-section 4.1 becomes the next number in sequence, even if it would sort better earlier.
6. One document, one number. A contract and its three amendments can share a sub-folder, but each file gets its own number.
7. Let the platform auto-number if it can. Most deal rooms apply the index numbering automatically and keep it stable. Check that this still holds when files are moved.

How should individual files be named?

Number first, then a short, human description, then a date where it helps. Avoid internal shorthand and version tags such as “final2”.

Convert working files to searchable PDF unless the buyer genuinely needs the spreadsheet, such as a financial model. Native spreadsheets should still sit in the index with their own number.

How does the index change by deal type?

The template above is built for a sale of a mid-sized private company. Other deals need more, or a lot less. Use this matrix to trim or extend.

“Core” means keep the full section. “Light” means one or two sub-sections. “Extended” means add sub-sections specific to that deal. Our use case pages, such as startup fundraising and real estate, cover what buyers in each scenario expect to find.

How do you build the index, start to finish?

1. Start from the request list

   If the buyer or lead investor has sent a diligence request list, map each request to a section and sub-section. If not, start from the template above.

2. Trim for your deal

   Use the deal-type matrix to delete sections you do not need and add sub-sections you do. Aim for around ten top-level sections.

3. Draft the index as a spreadsheet

   One row per expected document: number, title, owner, status (uploaded, to follow, not applicable) and the release wave. This becomes your tracker.

4. Mirror it in the room

   Create the folder tree in the data room to match the spreadsheet exactly, including section 0 and the Q&A responses section.

5. Upload and reconcile

   Upload by section, then reconcile the room against the spreadsheet. Every row should be uploaded, marked to follow with a date, or marked not applicable.

6. Publish and freeze the scheme

   Place the index in section 0 and share it with bidders. From this point, numbers are fixed; new documents are appended.

For the documents that go into each section, use our due diligence checklist, which also covers which files to hold back until later waves.

How should the Q&A responses section work?

Section 11 in the template catches documents that arrive because a bidder asked for them. It is easy to treat as a dumping ground, and that is a mistake.

Number each item by the question that prompted it, for example 11.1.24 for a document supplied in answer to question 24. Then add a cross-reference: if the document really belongs in 4.1, also upload it there with the next available number and note both locations in the index. That way a reviewer browsing the commercial section still finds it, and the Q&A trail shows when and why it was provided.

Two cautions. First, if one bidder asked, decide whether the answer and document go to every bidder or only the one who asked; most sellers share documents that correct or complete the main disclosure with everyone. Second, watch the dates. Material added in the final days before signing tends to attract scrutiny in disclosure negotiations, so make sure the upload date is visible in the index export.

What happens to the index at signing?

It becomes evidence. In most sales the purchase agreement or disclosure letter refers to the contents of the data room, often by attaching or referencing the index as it stood on a cut-off date. That is one more reason never to renumber, and to archive the room, including the index and the audit trail, at signing.

Good records practice backs this up. The international standard for records management, ISO 15489-1, stresses that records should be authentic, reliable and usable over time; a stable numbering scheme and a frozen archive are how a data room meets that bar.

Keep retention in mind too. If the room holds personal data, the GDPR’s storage limitation principle in Article 5 means the archive should be kept only as long as there is a reason, typically tied to warranty claim periods. Agree with counsel who holds the archive and for how long.

Can your data room software build the index for you?

Mostly. Nearly every deal-focused room in our rankings numbers folders automatically when you create them or drag them in, and many will export the index as a spreadsheet or PDF at any point. Things to check during a trial:

• Does numbering stay fixed when you move a folder, or does it recalculate?
• Can you export the index with upload dates and the person who uploaded each file?
• Can you lock the index once the room opens?
• Do AI tools that suggest folder placement respect your numbering scheme?

Several rooms we score, including Ellty, Datasite, Ansarada and Drooms, list AI tools that help sort and tag uploads. They save time on large uploads; still review the result against your spreadsheet before bidders arrive.