Due Diligence Checklist (Seller) — Pre-Listing Prep
Sellers who prepare their documents before going to market close faster and at higher multiples. Buyers make decisions faster when a business looks organized. This checklist helps you anticipate every question a serious buyer will ask — and get the answers ready before they ask. Plan 3–6 months of preparation for a clean, buyer-ready presentation.
⚠️ Not Legal Advice
This template is for informational and educational purposes only. It does not constitute legal advice and should not be used as a substitute for professional legal counsel. Business acquisitions involve complex legal, financial, and tax issues that vary by state and transaction type. Always consult with a qualified business acquisition attorney before signing any binding agreement.
1. Financial Cleanup (Do This First)
□ Reconcile all bank accounts to financial statements — fix any discrepancies now
□ Remove all non-business personal expenses from the books (or document as add-backs)
□ Calculate normalized SDE/EBITDA with documented, defensible add-backs
□ Collect and organize 3 years of signed tax returns (federal and state)
□ Prepare or request clean P&L and balance sheets for 3 years + YTD
□ Identify and explain any significant revenue or expense anomalies
□ Close or reduce any lines of credit you don't plan to transfer
□ Resolve any overdue accounts payable or vendor disputes
□ Collect outstanding accounts receivable — a clean AR aging improves valuation
□ Document the working capital cycle and "normal" working capital level
2. Legal & Corporate Cleanup
□ Obtain certificate of good standing from your state of formation
□ Review operating agreement/bylaws — ensure ownership records are current and clean
□ Check for any UCC liens filed against your assets — get them released if paid off
□ Resolve any outstanding litigation, demand letters, or regulatory matters
□ Review all IP registrations — renew any that are expiring; transfer any in an owner's personal name into the business entity
□ Ensure domain names, social media accounts, and email addresses are owned by the business entity (not the owner personally)
□ Compile all executed contracts into a single folder — identify missing or expired agreements
□ Review lease agreement: confirm assignability, personal guarantee terms, and remaining term
3. Operations Documentation
□ Document standard operating procedures (SOPs) for all critical processes
□ Create an org chart showing reporting structure
□ List all software, platforms, and subscriptions — document login credentials (store securely)
□ Document supplier contacts and relationship history
□ Identify and document any owner-dependent processes and begin transitioning them
□ Create a vendor contact sheet with all key accounts, renewal dates, and contract status
□ Document any proprietary methods, recipes, formulas, or processes in writing
4. Customer & Revenue Documentation
□ Prepare customer revenue report: annual revenue by customer for 3 years
□ Identify your top 10 customers and document relationship strength
□ Note any customers who are personally tied to the owner and may not transfer
□ Compile all customer contracts — flag those with change-of-control or termination clauses
□ Prepare metrics: customer retention rate, average order value, LTV
□ Document sales pipeline and active opportunities
□ Identify and document recurring vs. project-based revenue
5. Employee Preparation
□ List all employees: name, title, start date, compensation (salary + benefits), employment type
□ Identify key employees and assess retention risk post-sale
□ Review employment agreements — flag non-competes that run with the business
□ Ensure all I-9 records are complete and compliant
□ Resolve any pending HR disputes, wage claims, or compliance gaps
□ Confirm payroll tax filings are current (match 941s to payroll records)
□ Consider retention bonuses or "stay packages" for key employees to assure the buyer
6. Valuation Preparation
□ Request a preliminary valuation from a business broker or M&A advisor
□ Understand your SDE multiple range (industry-specific — typically 2–4x for main street; 4–8x for lower middle market)
□ Identify value drivers to strengthen before listing: revenue diversification, recurring revenue, strong margins, documented processes
□ Identify and address value detractors: customer concentration, owner dependency, declining margins, lease uncertainty
□ Prepare a "seller's narrative" — a 1-2 page overview of the business, its strengths, and the growth opportunity for a buyer
□ Assemble a data room (use a secure document-sharing platform like Docsend, DocuSign, or Dropbox)
□ Prepare a teaser (anonymous summary) and a full CIM (Confidential Information Memorandum)
7. Tax & Deal Structure Preparation
□ Consult with your CPA on the tax implications of an asset sale vs. stock sale
□ Understand the tax treatment of the purchase price allocation — particularly goodwill vs. equipment vs. non-compete payments
□ Model your after-tax proceeds under different deal structures
□ Identify any state-specific transfer taxes or bulk sales notification requirements
□ Review whether you qualify for installment sale treatment (if accepting a seller note)
□ Discuss estate planning and timing considerations with your attorney
8. Presentation Checklist
□ Professional data room organized by category (financials, legal, operations, HR, IP)
□ Clean, formatted P&L with add-back schedule
□ Asset list with estimated fair market values
□ Photos of facility and key equipment
□ Customer and vendor testimonials or references (with permission)
□ Signed NDA template ready for all interested parties
□ LOI template (see the BizStackHub LOI Template) ready to review with your attorney
□ Business broker or M&A advisor engaged (optional but recommended for deals >$500K)
□ Seller Disclosure Schedule prepared and reviewed by your attorney
Need a Business Acquisition Attorney?
Using templates as a starting point is smart. Having an attorney review or customize them for your specific deal and state is essential. Connect with a vetted business acquisition attorney through Contracts Counsel.
Start 12–24 months before you want to close. The first 6–12 months are for operational cleanup — reducing owner dependency, normalizing earnings, fixing obvious liabilities. The last 6–12 months are for marketing prep, finding buyers, and navigating due diligence. Sellers who rush the process get lower multiples and more deal failures.
Yes — a professional business valuation sets realistic expectations, identifies value drivers to improve before listing, and protects you from underselling. Business brokers typically offer free valuations (with the expectation of listing), while a formal certified valuation costs $2,000–$10,000 and carries more credibility with sophisticated buyers and lenders.
Three years of tax returns, three years of profit & loss statements, a current balance sheet, and a seller's discretionary earnings (SDE) calculation with documented add-backs. These four items determine whether a buyer moves forward. Have them ready in a clean, organized data room from day one.
Keep the sale confidential from employees until closing is certain. A buyer rumor can trigger turnover that kills the deal or reduces the business's value. Share information only on a need-to-know basis, and have NDA protections in place with any potential buyer before disclosing sensitive employee details.