Seller due diligence checklist: what to prepare for a sale

Income statements, contracts, and role coverage in buyer diligence

A buyer does not ask for an income statement or a customer contract simply to fill a folder. The request usually tests whether the company can support the story behind the records.

The SBA's buyer guide names financial statements and tax returns as part of acquisition work. It also identifies contracts, leases, licenses, permits, confidentiality terms, letters of intent, and purchase-price adjustments. Those are broad categories, not a disclosure sequence for a particular seller. ^[1]

Write the question beside the request before asking people to collect files. A customer-contract entry, for example, should identify the renewal date, any assignment language, and the person who knows the relationship. A precise question belongs with the executed agreement. The summary only helps the team find it.

For a fuller view of these requests, visit the Buyer Diligence desk. It places this preparation work alongside the questions that follow once a sale process becomes real.

• Whether reported earnings can be traced to the activity behind them.
• Whether an important customer relationship is likely to continue after ownership changes.
• Whether an agreement needs consent, notice, or another transfer step.
• Who carries the work when the owner steps back.

Income statements, tax returns, and supporting records

Choose the period the buyer is trying to understand. A year-end statement, trailing-twelve-month view, tax return, and general ledger can all matter, but only when their dates line up. Put the first and last date beside the request before collecting supporting files. Otherwise, a current-month report can quietly get compared with an older tax return.

IRS recordkeeping guidance describes documents that support recorded business transactions. Its examples include invoices, receipts, bank statements, and deposit records. It also names sales invoices, payment records, and other proof of payment. Those documents can trace an amount back to the business activity behind it. They cannot establish normalized earnings, company value, or the right time to release a file on their own. ^{[2, 3]}

As you collect the support for a selected period, keep the records that explain the number together before the buyer has to ask for a second round:

• The selected income statement and balance-sheet period, with the controller or finance lead responsible for the tie-out.
• The tax return, ledger detail, and bank or deposit support that explain material income and expense lines in that period.
• Payroll and owner-compensation support when the buyer's question is really about the people cost embedded in earnings.
• A short note on any open month, unusual entry, missing source, or item that needs a follow-up. Do not guess.

Customer contracts, renewal schedules, and role coverage

Financial records explain what happened. Customer, contract, and payroll material takes the next step: it shows whether the operating result can continue after the sale. That is why a buyer may ask for a customer list, material agreements, a renewal schedule, a lease, or a role map.

For a material customer, prepare a concise summary of what is sold, the current renewal or expiration date, and any known notice or assignment language. If margin or concentration changes the account discussion, include that context and name the person who handles the relationship day to day. You should be able to point from the summary to the signed agreement when a buyer asks a contract-specific question.

Keep an executed agreement, its current schedule, and the person who understands the obligation together. A lease may raise a consent question. A vendor agreement may point to pricing or term risk. A folder full of agreements is not much help if nobody can identify which contract governs the current obligation.

Payroll shows who is paid. A role map and coverage note show who runs sales, delivery, finance, or customer support when the owner changes roles. ^[1] If the management bench is thin, name the operations lead beside that gap before it disappears inside a staffing export.

• Customer summaries tied to the contract, renewal date, relationship owner, and any concentration context that changes the discussion.
• Executed leases and material agreements tied to the person who can explain term, consent, pricing, or the current obligation.
• A current role and coverage view tied to the people who carry the work beyond the owner's own activity.

When to share a customer contract, payroll report, or lease

A prepared file can still require a separate decision about sharing. Timing depends on the recipient, the purpose of the request, the protections in place, the deal stage, and advice specific to the company. Neither the SBA overview nor IRS recordkeeping material creates a general rule for that decision. ^{[1, 2]}

We use “controlled review” as an editorial label for a prepared file that still needs a recipient, purpose, and timing decision. The status can say “prepared,” “needs verification,” “summary available,” or “held for controlled review.” Name the person who must confirm its next step.

An owner can address the earlier question in the confidentiality before selling guide before outreach. It explains what to prepare and protect. Permissions, versions, and release logistics belong in a distinct data-room guide once that route has its own research base.

Missing renewal schedules and unclosed financial periods

If you find an incomplete file, do not bury it in a larger folder. Name the gap. If a customer-renewal schedule is six months old, record the covered date, the commercial lead who can update it, the fact that remains unknown, and the refresh date. The same approach works for an unclosed month, a missing invoice, or a role description that no longer matches the operating team.

In the fictional Westfield Services payroll report, the finance team has the current export, but the operations lead has not confirmed who covers two field-supervisor duties when the owner is absent. The payroll file is prepared. The management-coverage question remains open. Writing that distinction down prevents a buyer question from being answered with a document that cannot answer it.

A missing invoice is a record problem. When the gap raises a larger question about whether reported earnings can be supported or normalized, follow it into earnings quality.

Who can explain a contract, payroll report, or lease?

Begin with a small register. Pick the files most likely to change the earnings, customer-continuity, transfer, and management discussion, then add more only when a buyer asks a specific question. We use the fictional Westfield entries below to show the method. They illustrate the approach without setting a required request list or sale timeline.

A register keeps the file, business question, accountable owner, selected period, current state, and disclosure stage in one place. That makes gaps and follow-up visible without pretending to make a legal disclosure decision. ^{[1, 2]}

The customer contract, payroll report, and equipment lease do not move through the same stage because they answer different questions and need different people to close the information gap. Keeping the record, owner, and status together makes that difference hard to miss.

Once the financial period is stable and the right people are named, estimate a sale-price range before treating the review file as a conclusion about value. A confidential conversation can begin with broad context, without uploaded documents. Start a confidential valuation conversation only when you are ready to discuss the company at a high level. Keep sale documents out of a public form.