The M&A due diligence checklist, and how to track it in excel

September 18, 2026

An M&A due diligence checklist in Excel provides a structured framework for managing the information and documents required throughout an acquisition. It consolidates requests from multiple review areas such as financial, legal, tax, HR, and intellectual property into a single spreadsheet, making it easier to assign responsibilities, monitor progress, and identify outstanding items.

By tracking document status, ownership, and review priorities in one place, the checklist helps deal teams coordinate due diligence more efficiently and reduces the risk of missing critical information before closing.

TL;DR

An M&A due diligence checklist in Excel organizes items across core workstreams like financial, legal, HR, and intellectual property, giving teams a way to track documents, assign tasks, and monitor progress across the whole deal rather than one function at a time.
Standard templates share a common column structure: item number, category, document requested, a status dropdown (Not Started, Requested, Received, Under Review, or Complete), priority level, assigned owner, and a field for red flags or notes.
This article covers what belongs in the checklist, how to structure it across multiple workstreams in Excel, and where a spreadsheet starts to struggle once a deal is moving fast with several teams involved at once.
If the deal includes new debt financing, Termgrid’s Deal Execution module manages that specific slice of the process, keeping documents and lender access tied to the same deal.

What is M&A due diligence

M&A due diligence itself is the investigation a buyer runs on a target company before completing an acquisition. It covers far more than financial performance: legal standing, existing contracts, day-to-day operations, workforce matters, and intellectual property are all checked to confirm the target is what it claims to be and to catch any risks before the deal closes.

The purpose is simple, even though the process is broad. A buyer wants to know what they’re actually acquiring, what liabilities come with it, and whether anything found during the review should change the price, the terms, or the decision to go ahead at all.

Who is an M&A due diligence checklist for

An M&A due diligence checklist in Excel organizes items across core workstreams like financial, legal, HR, and intellectual property, giving teams a way to track documents, assign tasks, and monitor progress across the whole deal rather than one function at a time.

An M&A due diligence checklist is used by several different roles across a transaction, usually at the same time:

Corporate development teams running the acquisition process end to end, coordinating across every workstream.
M&A associates and deal counsel managing the legal and financial review, drafting requests, and tracking what’s been received.
Functional leads (finance, HR, IT) responsible for reviewing their specific workstream and flagging issues within it.
Lenders and their advisors, when the transaction includes new debt financing, focused specifically on the financial and legal due diligence relevant to the facility being extended.

The checklist itself is shared across these roles, but each one typically only owns and reviews their own section of it.

M&A due diligence checklist

A comprehensive M&A due diligence checklist is organized by workstream, since different functional teams typically own different parts of the review. The most common workstreams are:

Financial due diligence. Historical financial statements, monthly P&L, aging reports, working capital and cash flow, existing debt and capital structure, and tax returns.
Legal and corporate due diligence. Corporate formation documents, minute books, cap table, material contracts, litigation history, and regulatory compliance.
Operational and commercial due diligence. Customer and supplier relationships, key processes, business dependencies, software licenses, and cybersecurity or network security protocols.
Human resources due diligence. Employment agreements, benefits, organizational structure, and payroll summaries.
Intellectual property due diligence. Patents, trademarks, licensing agreements, and proprietary technology.

Each workstream typically has its own set of requested documents, owners, and reviewers, which is why a single flat checklist tends to become unwieldy once a deal moves past a small transaction.

How to structure an M&A due diligence checklist in Excel

Build the checklist as one shared list, split by workstream, rather than a separate file for each function:

Set up one row per document or item, not one row per workstream. A workstream like “financial” often expands into ten or more individual items once you break it down.
Add a category or workstream column so items can be grouped and filtered, even though every row tracks one specific item.
Use a fixed status dropdown: Not Started, Requested, Received, Under Review, or Complete. Avoid free text, since consistent values are what make filtering and status checks reliable later.
Assign an owner to every item. With several teams working on the same checklist, an item with no clear owner is the one most likely to get missed.
Add a priority level. High, medium, or low helps a busy deal team focus on what actually matters for closing, not just what’s on the list.
Add a notes or red flag column for anything that needs more context than the status alone gives, such as a partial document or a concern raised during review.

Columns to include in an M&A due diligence checklist

A quick reference for the column structure described above:

Column	What it captures
Item number	A sequential ID so each request can be referenced easily
Category / workstream	Financial, Legal, HR, IT, Operations, or IP
Document / information requested	The specific file or piece of data being asked for
Status	A fixed dropdown (Not Started, Requested, Received, Under Review, Complete)
Priority	High, medium, or low
Assigned owner	The team member responsible for that item
Notes / red flags	Space to record concerns, missing data, or follow-up questions

Types of due diligence relevant to a debt-financed transaction

A full M&A due diligence checklist covers workstreams like HR and intellectual property that fall outside anything related to financing. When a transaction includes new debt, three types of due diligence carry the most weight for the lender’s side of the process:

Financial due diligence. Historical financial performance, existing debt and capital structure, and cash flow available to support the proposed facility. This is the core review a lender relies on to assess repayment capacity.
Legal due diligence, specifically around existing debt. Current loan agreements, liens, guarantees, and any covenant or compliance history tied to existing obligations. A lender needs to understand what’s already encumbering the target before extending new debt.
Operational and commercial due diligence, where it affects cash flow or collateral. Customer concentration, contract terms, and asset condition, to the extent these directly affect the cash flow or collateral the facility depends on.

HR and intellectual property due diligence remain part of the broader M&A checklist, but they generally sit outside what a lender’s diligence team needs to review directly.

Common problems teams run into tracking M&A due diligence in Excel

Formulas and formatting break as the checklist grows. A checklist that starts as a simple list often ends up with inserted rows, copied formulas, and inconsistent formatting once multiple teams start editing it, which makes filtering or summarizing unreliable.
There’s no real-time visibility across teams. If finance, legal, and HR are each updating their own section, nobody has a live view of the whole checklist unless someone manually consolidates it, which introduces delay and the risk of working from an outdated copy.
Status tracking depends on manual discipline. A dropdown for status only works if everyone updates it consistently. In practice, some items get marked as received when a document is only partially complete, or don’t get updated at all until someone asks.
There’s no audit trail. A spreadsheet shows the current status but not who changed it, when, or what the previous value was, which matters if a document’s status is disputed later in the process.
Multiple versions circulate quickly. Once the checklist is emailed between corporate development, legal, and the target company’s team, keeping track of which version is current becomes its own administrative task.

Where a spreadsheet checklist reaches its limit on a live deal

The problems above are frustrating but manageable early in a process. They become a real risk once a deal is moving quickly and multiple parties need reliable, simultaneous access to the same information.

Document access isn’t controlled by the checklist. The checklist tracks that a document was requested and received, but the actual file might be sitting in an email attachment or a shared drive folder that isn’t access-controlled by counterparty or workstream.

There’s no way to see who has actually reviewed what. A status of “received” only tells you the document arrived, not whether the responsible reviewer has opened it, flagged it, or signed off.

Sensitive documents need more than a shared file. As diligence moves into more sensitive material, financial statements, existing credit agreements, cap tables, sharing everything through the same unrestricted spreadsheet and email trail becomes a real confidentiality risk, not just an inconvenience.

Deadlines compound the coordination problem. When a deal is on a tight timeline, the cost of a missed update or a stale checklist version is no longer just administrative friction. It can delay the entire closing.

None of this means Excel is the wrong starting point. It means the checklist and the underlying documents need to be managed by something built to control access and track activity, not just list requests.

How Termgrid manages the debt financing side of M&A due diligence

Termgrid is the platform purpose-built for private capital markets, giving deal teams a controlled, access-managed home for the debt-financing side of a deal rather than tracking documents and lender access across spreadsheets and email.

Deal Execution is part of that platform, built for exactly this slice of the process: the borrower’s financials, existing debt, and the documents and access that go to lenders, while legal, HR, and IP diligence stay in your broader M&A workflow.

See how Termgrid’s Deal Execution module works, or request a demo to walk through it with a member of the team.

Frequently asked questions

1. What is M&A due diligence?

It’s the review a buyer runs on a company before completing an acquisition. It checks the company’s finances, legal standing, contracts, workforce, and intellectual property, so the buyer knows exactly what they’re getting and whether anything should change the price or terms before the deal closes.

2. What columns should an M&A due diligence checklist include?

At minimum: item number, category or workstream, document requested, status, priority, assigned owner, and a notes or red flag field. Splitting items by workstream keeps a large checklist easier to manage as more teams get involved.

3. Can Excel handle a large M&A due diligence checklist with many workstreams?

Yes, but it needs a bit of structure to stay usable. A workstream column, a consistent status dropdown, and a clear owner for every item keep things organized as more teams start contributing to the same file.

4. Does Termgrid manage the entire M&A due diligence process?

No. Termgrid focuses on the debt financing side of a deal, not legal, HR, or intellectual property review. If an acquisition includes a new or amended debt facility, Termgrid’s Deal Execution module handles the documents and lender access for that part of the process.

5. If a deal includes both an acquisition and new debt financing, how do the two fit together?

They usually run side by side, with different teams and different documents. The broader M&A checklist covers the acquisition itself, while the debt financing review, focused on the borrower’s finances and existing obligations, runs alongside it. Termgrid is built for that second part, not the acquisition checklist as a whole.

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