Why Business Sales Fall Apart in Due Diligence (and How Columbus Sellers Avoid It)
Many due diligence failures trace back to records a seller could have organized months earlier. Reconcile your financials, document every add-back, confirm your lease and contracts can transfer, and clean up your Ohio sales tax filings before you list. A broker who screens buyers and manages the document flow keeps small problems from turning into deal-ending ones.
A business sale falls apart in due diligence when what the buyer verifies doesn't match what the seller presented. The usual gaps are earnings that won't reconcile to tax returns, add-backs with no records, contracts that can't transfer, and unpaid tax exposure. Columbus sellers avoid this by assembling and checking those records before the business is listed.
Quick Answer: Due diligence punishes surprises. Find yours and fix them before a buyer does, while the timeline is still yours.
KEY TAKEAWAYS
- Due diligence is the buyer's verification period after a letter of intent, and the purchase price depends on what it confirms.
- Deals break when financials, contracts, or tax records don't match what the buyer was shown.
- Under Ohio law, a buyer who doesn't hold back money for a seller's unpaid sales tax can become personally liable for it, which makes tax clearance a closing issue.
- Recent industry data shows most sellers start the process with less than a year of exit planning.
- The records you organize six to 12 months before listing do more to protect your price than anything you scramble to find once a buyer starts asking.
WHERE DEALS ACTUALLY BREAK
For a lot of owners, the hardest part of selling a business comes after they've accepted an offer. The letter of intent is signed, the price is agreed, and you've started picturing what comes next. Then the document requests arrive.
This is due diligence, and it's where a sale gets tested line by line. If you plan to sell your business in Columbus, Ohio, or anywhere in Central Ohio, knowing what buyers look for protects the price you negotiated.
At First Choice Business Brokers Columbus, we prepare sellers for this phase long before a buyer is at the table. Here's what buyers verify, where deals tend to come apart, and what you can do about it now.
What Actually Happens in Due Diligence When You Sell a Business?
Due diligence is the period after a letter of intent when the buyer, their lender, and their advisors verify what the seller has represented. They review tax returns, bank statements, leases, contracts, payroll, licenses, and liabilities. The purchase price is conditional on what they find, so this phase decides whether the deal actually closes.
For most Main Street businesses, the request list is long but predictable. Expect to provide three to five years of federal tax returns and profit-and-loss statements, recent bank statements, an equipment and inventory list, your lease and major contracts, and employee details.
If the buyer is financing with an SBA-backed loan, the lender runs its own review alongside the buyer's, with its own list of questions.
Timing matters too. The IBBA and M&A Source Market Pulse Survey for Q2 2026 found that Main Street deals took six to 10 months from engagement to close, and that timelines lengthened compared with the prior quarter.
Due diligence is one of the longest stretches in that window, and every week it runs long gives a buyer more time to second-guess.
Why Do Business Sales Fall Apart in Due Diligence?
Sales fall apart in due diligence when the verified business doesn't match the business the buyer agreed to buy. The most common gaps are earnings that won't reconcile to tax returns, owner add-backs with no paper trail, revenue concentrated in a few customers, and leases or contracts that can't pass to a new owner.
The Numbers Don't Reconcile
A buyer's accountant will line up your profit-and-loss statements against your tax returns and bank deposits. When those three sources tell different stories, the buyer stops trusting all of them.
Cash revenue that never made it onto a return is the classic example. You can't ask a buyer to pay for income you told the IRS you didn't earn.
Add-Backs Without Receipts
Seller's discretionary earnings, the figure most small businesses are priced on, includes add-backs such as the owner's salary, a personal vehicle, or a one-time repair. Each add-back raises the value, and each one has to be proven.
An add-back you can't document is one a buyer will subtract, and the price moves with it.
This is also where advisors genuinely disagree. Some push every seller to commission a sell-side quality of earnings review before listing. On a $3 million company, that conversation is worth having.
On a $500,000 service business, the cost can outweigh the benefit, and clean books with a well-supported add-back schedule may do the same job. We look at that one deal by deal.
Customer Concentration and the Owner Problem
If one customer accounts for a large share of revenue, or every important relationship runs through you personally, the buyer is asking a fair question: what happens when you leave?
When this surfaces late, buyers commonly respond by moving part of the price into an earnout or a longer seller note. Some sellers accept that. Others walk away from the restructured offer, and months of work go with them.
Leases, Licenses, and Contracts That Won't Transfer
A restaurant with four years left on a favorable lease is worth more than the same restaurant on a month-to-month arrangement. If that lease requires landlord consent to assign and nobody has asked the landlord, the buyer's lender may not fund.
The same applies to franchise agreements, major supplier contracts, and permits, such as liquor permits, that don't simply pass to a new owner.
If you want to see this review from the other side of the table, our guide to the red flags buyers miss without a broker walks through what a careful buyer checks.
The Ohio Tax Rule That Can Hold Up a Closing
Ohio law requires a buyer to withhold enough of the purchase price to cover a seller's unpaid sales tax until the seller produces a receipt or certificate from the Ohio tax commissioner. A buyer who skips that step becomes personally liable for the tax, so experienced buyers, attorneys, and lenders insist on it.
The rule is in Ohio Revised Code Section 5739.14. It also requires the seller to file a final sales tax return within 15 days of selling or quitting the business.
For a retailer, restaurant, or any business that collects sales tax, a sloppy filing history doesn't stay in the past. It shows up as money held back at closing, or as a delay while the certificate gets sorted out.
Pull your Ohio sales tax filing history before you list. Your CPA can usually tell you quickly whether anything is outstanding, which beats finding out when a closing date slips.
How Do Columbus Sellers Prepare Before a Buyer Asks?
Columbus sellers prepare by building the buyer's due diligence file themselves, ideally six to 12 months before listing. That means reconciled financials, a documented add-back schedule, reviewed leases and contracts, clean tax filings, and a plan to reduce dependence on the owner. A broker organizes the file and releases it only to qualified buyers under an NDA.
Most owners start well after that point. In the same Q2 2026 Market Pulse survey, between 60% and 90% of sellers across market segments had done less than a year of exit planning, or none at all, and retirement was the leading reason owners went to market.
Here's what to gather, and why a buyer will ask for it:
| What to Gather | Why Buyers Ask for It |
|---|---|
| Three to five years of tax returns and P&L statements | To confirm earnings and the trend behind them |
| 12 to 24 months of bank statements | To match deposits to reported revenue |
| Add-back schedule with receipts | To support the earnings figure the price is built on |
| Your lease, including assignment terms | To confirm the location transfers with the business |
| Top customer and vendor contracts | To test concentration and transferability |
| Ohio sales tax and payroll filings | To clear successor liability and withholding questions |
| Employee roster and notes on who does what | To plan retention after the sale |
| Equipment and inventory list | To confirm what the price includes |
You'll be sharing some of the most sensitive information in your business, so the order in which buyers see it matters. Buyers sign a nondisclosure agreement and show they can finance the purchase before financials change hands.
That sequence is what protects you from the stomach-drop moment when a longtime employee asks whether the rumors are true.
What Does a Business Broker Do During Due Diligence?
A business broker keeps due diligence moving. That includes organizing the document room, answering routine buyer questions, spotting problems before they become objections, and coordinating with your attorney and CPA. The broker doesn't replace legal or tax advice. The job is keeping a verified deal on schedule while you keep running the business.
That last part is easy to underestimate. Six to 10 months is a long time to run a company by day and answer a buyer's questions at night.
Revenue that dips during due diligence hands the buyer a fresh reason to renegotiate, so protecting your normal operations is part of protecting the deal.
Frequently Asked Questions
What do buyers look at in due diligence when buying a small business?
Buyers review tax returns, profit-and-loss statements, bank statements, leases, customer and supplier contracts, payroll records, licenses, permits, and any pending liabilities. Their goal is to confirm that the earnings, assets, and risks match what the seller represented before they commit the full purchase price.
How long does due diligence take when selling a business?
It varies with deal size, financing, and how organized the seller's records are. Due diligence often runs several weeks to a few months. The IBBA's Q2 2026 Market Pulse survey found Main Street sales took six to 10 months overall, from engagement to closing.
Why do business sales fall through during due diligence?
A sale falls through when the buyer finds something that contradicts what they were told: earnings that don't match tax returns, undocumented add-backs, heavy customer concentration, or a lease that won't transfer. Sellers who verify those items before listing remove most of the surprises that end deals.
Do I need a business broker to sell my business in Columbus, Ohio?
You aren't required to use one, but a licensed broker prices the business, screens buyers, protects confidentiality, and manages due diligence so the deal keeps moving. For most owners, that support protects both the sale price and the day-to-day operation of the business during the sale.
What is Ohio successor liability for sales tax when you sell a business?
Under Ohio Revised Code 5739.14, a buyer must withhold enough of the purchase price to cover the seller's unpaid sales tax until the seller provides a tax commissioner receipt or no-tax-due certificate. A buyer who fails to withhold can be held personally liable for that tax.
ABOUT THE AUTHOR
Frank Nunziata is the President of First Choice Business Brokers Columbus and a licensed Real Estate Broker in Ohio, with an earlier career in professional services at PwC. He has worked as a Business Broker since 2004 and serves as an Area Representative for FCBB Ohio.
Frank and the FCBB Columbus team work from 1900 Polaris Parkway, Columbus, OH 43240, and guide owners wherever their business is located in Columbus and Central Ohio, including Franklin, Delaware, Richland, Marion, Union, Licking, Pickaway, Fairfield, Hocking, Madison, Muskingum, Morrow, Perry, and Knox counties.
FCBB agents are licensed professionals specializing in business sales. We do not provide legal or tax advice. Consult your own advisors.
BEFORE THE FIRST DOCUMENT REQUEST
Due diligence is where a buyer decides whether the business they agreed to buy is the one they're getting. You can make that an easy decision by doing the verifying first.
If you're thinking about selling in the next year or two, start with a confidential conversation and a complimentary business valuation. Schedule a free consultation with FCBB Columbus today.
First Choice Business Brokers Columbus | columbus.fcbb.com
Serving: Franklin, Delaware, Richland, Marion, Union, Licking, Pickaway, Fairfield, Hocking, Madison, Muskingum, Morrow, Perry, and Knox Counties, OH
Member: International Business Brokers Association (IBBA)
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