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What Is Due Diligence When Selling a Business?

A plain-English answer, and why it matters when you actually sell.

Short answer: Due diligence is the buyer's deep investigation of a business after signing a letter of intent and before closing. The buyer verifies financials, contracts, legal standing, operations, and customer concentration to confirm the business is what the seller represented. It is where deals are re-traded or lost, so entering it with clean, already-proven numbers is the seller's best protection.

Why Due Diligence matters when you sell

Once you sign an LOI, the buyer earns a window of exclusivity to confirm everything. They will want financials, tax returns, customer contracts, employee agreements, leases, and answers to every question about how the business really runs. Nothing kills more deals, or lowers more prices, than diligence surprises, so the seller's job is to have no surprises.

The way to win diligence is to do it to yourself first. A sell-side quality of earnings review, a clean data room, and honest disclosure up front mean the buyer confirms rather than discovers, and the price you agreed in the LOI is the price you close at. WETYR prepares the business so diligence is a formality, not a fire drill.

Frequently asked questions

How long does due diligence take?
Usually 30 to 60 days for a lower-middle-market business, longer if the financials are messy or the business is complex. Preparation is the single biggest factor in how smoothly and quickly it goes.
What do buyers look at in diligence?
Financial records and quality of earnings, customer concentration, contracts and leases, legal and tax standing, employee and owner dependence, and anything that affects whether the earnings continue after you leave.
Can I prepare for diligence before I sell?
Yes, and you should. A clean data room and a sell-side quality of earnings review let the buyer confirm your numbers instead of finding problems, which protects your price and speeds the close.

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