Preparing for Buyer Due Diligence: What Sellers Need

Most sellers think due diligence is something that happens to them. A buyer shows up with a checklist, asks for documents, and the seller scrambles to pull together whatever they can find.

That framing costs deals.

Preparing for buyer due diligence before you even have a signed letter of intent is one of the most impactful things a seller can do. It speeds up the timeline, prevents retrading, and signals to a buyer and their lender that your business is what you say it is. And it is not complicated. It just requires starting earlier than most sellers think is necessary.

What Buyer Due Diligence Actually Is

Due diligence is the buyer’s process of verifying everything in your CIM and LOI before they finalize financing and close. Not a formality. It is the moment where valuations get confirmed or adjusted, deal structures shift, and a meaningful percentage of transactions fall apart.

For SBA-financed acquisitions (which account for the majority of small business sales under $5M), due diligence runs in parallel with lender underwriting. The buyer’s bank is reviewing your financials, tax returns, and business records at the same time the buyer is running their own analysis. Two parallel reviews of everything you provide.

Typical due diligence periods run 30 to 45 days after the LOI is signed. In practice, disorganized sellers stretch that to 60, 70, even 90 days. That burns goodwill and creates openings for the deal to unravel.

The Three Areas That Decide Most Deals

When we underwrite acquisitions across 120 to 150 deals per week, the same friction points surface over and over. Sellers who have cleaned these up before the LOI close deals faster, with fewer surprises. Here is what gets scrutinized hardest.

Financial records. This is the primary focus for both the buyer and the SBA lender. They want three years of business tax returns, three years of profit and loss statements, and your most recent year-to-date financials. They will reconcile these against each other. If the numbers do not agree, you will be asked to explain the discrepancy. If you cannot explain it cleanly, the lender may reduce the loan amount or decline the deal entirely. We have seen lenders pull approvals over a $30K discrepancy between a P&L and a tax return that the seller could have explained in five minutes with the right documentation on hand.

Revenue concentration. A buyer looks at whether your top customers represent a dangerous share of total revenue. If one client accounts for 30% or more of your revenue, that is a material risk factor. It does not kill deals on its own, but it affects valuation and may trigger escrow holdbacks or earnout structures. Know your concentration numbers before diligence begins.

Owner dependency. The buyer’s lender wants to understand whether the business can operate without you. Heavy owner dependency suppresses the multiple a buyer can justify. If you are the primary relationship with most clients, the primary source of technical expertise, and the person who approves every transaction, that is a problem for SBA underwriting. Buyers will price in the transition risk.

So What Should a Due Diligence Package Actually Include?

Preparing for buyer due diligence means assembling a clean, organized data room before you need it. Most deals are structured around an online folder system, though some buyers prefer physical packages for smaller transactions.

A complete package typically includes:

Business tax returns for the last three full years (federal, and state if applicable)
P&L statements for the last three years plus year-to-date
Balance sheets for the last three years
Bank statements for the last 12 months
Accounts receivable and accounts payable aging reports
List of assets included in the sale with approximate values
Equipment list with purchase dates, current condition, and any lease or lien information
Copies of key contracts: customer agreements, vendor contracts, leases
Employee roster with roles, tenure, compensation, and whether they know about the potential sale
Copies of any licenses, permits, or certifications required to operate
Any litigation history or pending legal matters
Documentation of any add-backs claimed in your SDE calculation

The add-backs deserve special attention. If your broker or CPA has normalized your earnings by adding back personal expenses, one-time costs, or above-market owner salary, you need clean documentation for every single item. A buyer’s lender will scrutinize each add-back individually. Undocumented add-backs do not survive SBA underwriting. Period.

How SBA Underwriting Changes the Equation

Most sellers have sold one business in their lifetime, if that. And most do not realize that when the buyer uses SBA 7(a) financing, a third party is reviewing everything in that data room: the lender’s underwriting team.

The lender runs a parallel process to determine two things:

Whether the business’s cash flow is sufficient to service the proposed loan. They target a debt service coverage ratio of around 2.0x, meaning the business generates twice the annual debt service payment in SDE.
Whether the financial records actually support the purchase price.

Here is where it gets real. If your tax returns show $280K in SDE but your broker’s CIM claims $400K, you will be asked to reconcile that gap. If the reconciliation relies on aggressive add-backs that are not well-documented, the lender will use the lower number. That affects the maximum supportable loan amount, which affects what the buyer can actually pay.

This is why preparing for buyer due diligence is not just about gathering documents. It is about making sure the story your financials tell matches the story in your CIM before anyone starts asking questions.

The Seller Note Conversation Happens Here

One element that catches sellers off guard during diligence is the seller note discussion. In most SBA-financed acquisitions, the deal structure includes a seller note, typically 5% to 15% of the purchase price, placed on full standby for up to 10 years at 0% interest.

This is not a red flag. It is standard SBA deal structure. We achieve these terms on over 90% of the deals we work on. The SBA requires the seller note to be on full standby (meaning no payments during the loan period) to protect the primary lender’s position.

Sellers who understand this going in do not get rattled when the buyer presents a standby note in the purchase agreement. Sellers who have never heard of it treat it as a concession and sometimes blow up otherwise sound deals. Know that it is coming.

What Gets Missed Most Often

All of that covers the big-ticket items. But even sellers who have assembled a solid data room miss a few things consistently. These are the items that create delays late in the process, when everyone’s patience is thin.

Lease assignments. If your business operates in leased space, the buyer needs to assume or renegotiate that lease. That requires landlord consent, and landlords do not always move quickly. Start the conversation early. If your lease has less than three years remaining, the buyer’s lender may require a lease extension as a condition of loan approval.

Key employee retention. If two or three people in your business are essential to operations, the buyer will want some assurance they will stay post-close. This may come as employment agreement discussions during diligence. Know who your key people are and whether they are likely to stay.

Non-compete agreements. Every buyer will ask for one. The scope (geography, duration, industry) gets negotiated, but the existence of a non-compete is not optional. Know what restrictions you are willing to accept before the conversation begins.

Starting Your Prep Before You Have Even Listed

The best time to start preparing for buyer due diligence is 12 to 18 months before you plan to sell. That is not always realistic, but even 90 days of preparation before listing makes a meaningful difference.

In that window, three priorities matter most.

Run a quality of earnings review. Hire a CPA who does QoE work to stress-test your add-backs and identify accounting practices that will draw scrutiny. A $3,000 QoE engagement can prevent a $150,000 retrade at the LOI stage. That is not a hypothetical. We have seen it happen.

Clean up your books. If you have been running personal expenses through the business, stop. Or at minimum, make sure every one of them is documented and categorizable as an add-back. Mixing business and personal finances is the single most common source of diligence friction on deals under $2M.

Get your legal documents in order. Entity documents, ownership records, shareholder or operating agreements, intellectual property registrations, contracts with customers or suppliers. Know where these are. Your attorney should review anything that will transfer with the business.

Working with a Regalis-backed buyer means your buyer has already been through our internal underwriting process before they submit an offer. There is no cost to you as a seller. No commissions, no fees, no obligation. And because our buyers arrive with clean financing structures and proper advisory support, the diligence process runs more efficiently than it does with unprepared buyers coming in cold.

Frequently Asked Questions

What documents do I need when preparing for buyer due diligence?

At minimum: three years of business tax returns, three years of P&L statements, year-to-date financials, 12 months of bank statements, an asset list, copies of key contracts and leases, an employee roster, and documentation for any add-backs in your SDE calculation. Buyers using SBA financing will need these for lender underwriting too, so having them organized before the LOI is signed will materially speed things up.

How long does buyer due diligence take for an SBA-financed sale?

Most due diligence periods run 30 to 45 days from the signed LOI. SBA lender underwriting runs in parallel and typically takes 2 to 4 weeks once the lender receives a complete package. Sellers with organized records stay closer to 30 days. Sellers with incomplete records or reconciliation issues often push past 60 days, which creates deal fatigue and increases the risk of the whole thing falling apart.

Will undocumented add-backs hurt my sale price?

Yes. SBA lenders review each add-back individually. Add-backs without supporting documentation get excluded from the lender’s SDE calculation, reducing the maximum loan amount they will approve. That reduction flows directly into the price a buyer can offer. If your CIM claims $450K in SDE but the lender supports only $320K after removing undocumented add-backs, the offer will reflect the lower number.

Do I have to accept a seller note when selling my business?

In most SBA-financed acquisitions, yes. The standard structure includes a seller note representing 5% to 15% of the purchase price, placed on full standby for the term of the SBA loan (up to 10 years) at 0% interest. This is standard, not a concession. Sellers who understand this in advance negotiate more smoothly than those who encounter it for the first time in the purchase agreement.

What is the biggest mistake sellers make in due diligence?

Waiting until after the LOI to start gathering documents. Sellers who begin assembling their data room only after a buyer is under contract spend the first two weeks of diligence scrambling for records that should have been ready. That compression reduces time for actual review, increases buyer anxiety, and signals to the lender that the operation may not be clean. Prepare before you list.

Ready to Connect With a Serious, Pre-Qualified Buyer?

Regalis Capital works exclusively with buyers who are pre-qualified, properly funded, and backed by an experienced advisory team. When you receive an offer from a Regalis-backed buyer, you are working with someone who has already been underwritten internally and understands how to structure an SBA acquisition.

No cost to you as the seller. No commissions, no fees, no obligation.

If you are thinking about selling and want to understand what working with a serious, well-prepared buyer looks like, start the conversation here.