Financial due diligence is the process of verifying a seller’s financial claims before you commit to buying their business. Rather than taking the numbers at face value, you’re systematically confirming that the business actually earns what they say it earns, spends what they say it spends, and owns what they say it owns.

Start with revenue verification. Compare the seller’s claimed revenue to their tax returns, bank deposits, and point-of-sale reports. If they report $500,000 in annual sales but tax returns show $380,000, you have questions to ask. Look at customer concentration too. A business where 60% of revenue comes from one client carries risk that doesn’t show up on the income statement.

Dig into the expenses. Sellers sometimes understate costs to inflate profit. They might pay themselves below market salary, defer maintenance, or leave family members off payroll who actually work in the business. You need to understand what it actually costs to operate, not what the current owner chooses to spend.

Look for hidden liabilities. Review tax filings to confirm payroll taxes and sales taxes are current. Check for outstanding loans, equipment leases, and any pending legal matters. Ask about any verbal agreements with employees or vendors. These obligations transfer to you when you take over.

Verify the assets. Equipment that looks valuable on a balance sheet might be outdated or barely functional. Inventory counts should match what’s actually on shelves. Accounts receivable aging reports tell you whether customers actually pay or whether those receivables are really just uncollectible.

Normalize the financials to understand true cash flow. This means adding back the owner’s salary, any personal expenses running through the business, and one-time costs that won’t recur. It also means adding expenses the current owner skipped but you’ll need to pay. A small business accountant in the San Gabriel Valley who works with buyers and sellers regularly knows how to adjust for these items properly.

The due diligence period is when you find problems, not after you’ve signed. Getting a proper business purchase analysis from someone who knows what to look for catches issues you’d miss reviewing documents on your own. Sellers don’t volunteer information that hurts their sale price.

Most buyers focus too much on the opportunity and not enough on verification. Due diligence isn’t being suspicious or difficult. It’s protecting your investment by confirming that the business you’re buying matches the business the seller is describing.