What should a data room contain before a business sale starts?

Every business sale involves assembling the same set of documents. The only variable is whether they are assembled calmly over a few months or urgently over a few weeks while a buyer waits and the price drifts.

The documents are identical either way. What differs is what the assembly reveals about the business, because a data room built under deadline is visibly built under deadline, and buyers read that.

Structure before completeness

The instinct is to gather everything and then organise it. This is backwards, and it is why data rooms get rebuilt halfway through.

Build the index first, empty, to a standard structure. Then populate it. An index with gaps is legible: a buyer can see what is missing and ask about it. A pile of documents organised by when they turned up is not legible, and the buyer's advisers will spend chargeable hours turning it into an index anyway: hours that show up in the deal's timeline and mood.

An empty labelled folder is information. A missing folder is a question.

The standard index

Ten sections covers most small and medium transactions.

1. Corporate. Constitution, share register, director and officer records, minutes and resolutions, any shareholders agreement and its variations.
2. Financial. Statutory accounts, management accounts, tax returns, current-year trading, debtor and creditor ageing.
3. Customers. Customer agreements, standard terms and every version in circulation, the variation register, concentration analysis.
4. Suppliers. Supplier agreements, terms you have accepted, anything with exclusivity or minimum volume.
5. Employment. Contracts by role, the issue log, position descriptions, any incentive arrangements, current leave balances.
6. Property. Leases, variations, side letters, bank guarantees, make-good obligations, outgoings statements.
7. Assets and equipment. Ownership records, finance and hire arrangements, registrations of security interests.
8. Intellectual property. Registrations, ownership assignments from contractors, domain names, software licences.
9. Compliance and permits. Licences, registrations, insurance policies, incident records.
10. Disputes and claims. Anything open, anything closed in the last three years, anything threatened.

Section three is where most preparation time goes and it is where most value is lost when it is skipped, because customer agreements are what a buyer is actually buying.

The three things that consistently go missing

Contractor IP assignments. Work produced by contractors does not automatically belong to the business that paid for it. Businesses discover this in section eight, during diligence, which is the worst place to discover it. It is worth checking early, because remedying it requires the contractor's cooperation and their willingness is inversely related to how urgently you need it.

Side letters. Anything agreed outside the main document: a rent concession, a payment arrangement, a promise about renewal. They are rarely filed with the document they modify, so they are found by asking people rather than by searching folders, and the people who remember them leave.

The current version of your own terms. Section three assumes you can produce the terms your customers are on. If there are six versions in circulation and no register, this section becomes an inventory exercise conducted under deadline. Doing that count in advance is one of the highest-return preparation tasks there is.

Populate honestly

The temptation is to leave a section out rather than show it thin. This does not work, because the index is standard and its absence is conspicuous.

Where something does not exist, say so in the index. "No written agreement: supplied on purchase orders since 2019" is a fact a buyer can price. A missing folder is a fact a buyer will assume the worst about, and assumptions are always priced worse than disclosures.

Where something exists but is incomplete, say what is there and what is not. The disclosure costs less than the discovery.

Running it during the transaction

Once the room opens, the job changes from assembly to control.

Keep a request log: what was asked, by whom, who is producing it, and whether it has gone in. Requests arrive by email from several advisers at once and get answered inconsistently otherwise, and "we already sent that" is a conversation that costs goodwill.

Keep version control on drafts circulating between the parties. Several sets of advisers will each be working from their own copy, and the number of documents in flight peaks in the last fortnight when attention is lowest.

Close out afterwards. The post-completion filing pack (final executed documents, the completion checklist, everything the buyer received) is worth an afternoon at the end and is nearly impossible to reconstruct six months later.

The boundary

Assembling and indexing documents is filing work, and it is work that can start long before there is a transaction. What to disclose, how to describe it, and what any document commits you to are questions for your own external adviser and for whoever is advising on the deal.

Doing the filing first is what makes their time go on those questions instead of on the index.