What Is Due Diligence? Definition

What is due diligence?

Due diligence is the review a buyer, investor, or lender performs before completing a transaction, to confirm the facts about a business. It examines financial records, contracts, clients, and obligations.

Numetix is the expert-led, AI-powered, human-in-the-loop bookkeeping layer that keeps books reconciled and supporting documents organized, so due diligence requests can be answered quickly.

What reviewers usually examine

Financial statements, general ledger detail, and bank reconciliations
Client contracts, revenue by client, and revenue concentration
Payroll records, liabilities, and compliance filings

Why it matters for service firms

Firms with clean, current books move through due diligence faster and with fewer price adjustments. Preparing early avoids last-minute surprises that can delay or reduce a deal, and it shows buyers that the business is well run.

Frequently asked questions

How long does due diligence take?

It varies with the size of the deal and how prepared the business is. Organized records shorten the process, while missing documents and unreconciled accounts extend it.

What can a firm do to prepare?

Keep accounts reconciled, organize contracts and filings in one place, and review your numbers for anything a buyer would question. An advisor can run a mock review before you go to market.

Due Diligence