DSO Due Diligence: Financial Documents Sellers Must Prep

October 22, 2026

Key Takeaways

DSO buyers request a defined set of financial documents to test whether earnings are real, recurring, and transferable. The master checklist covers 10 core categories, including tax returns, P&L statements, balance sheets, and EBITDA add-backs.
Staged disclosure can protect seller leverage. Share only anonymized metrics pre-NDA, summary financials pre-LOI during competitive bidding, and the full data room post-LOI when exclusivity begins.
Each document serves a specific underwriting purpose. Tax returns verify consistency, production reports test owner dependency, A/R aging reports assess collectibility, and add-backs must have supporting documentation to hold value.
Unsupported add-backs and aged receivables are two common triggers for valuation haircuts. Sellers can reduce this risk by building 3-year add-back files with evidence and reconciling collections reports before going to market.
McLerran & Associates prepares these financial documents in a defensible way with a CPA-led, diligence-grade EBITDA analysis so valuations can hold under buyer scrutiny and deals are less likely to be re-traded.

Talk with McLerran & Associates about your potential DSO sale.

Start Here: The Financial Core Documents DSO Buyers Rely On

Of the dozens of items a DSO buyer will eventually request, 10 financial documents do most of the work of setting price. Assembling them before any buyer conversation begins can be one of the highest-impact steps a seller takes. Sellers who prepare early can achieve better valuations than those who list within months of deciding to sell.

Three years of federal tax returns. Buyers use these as a cross-check against reported income and as a consistency test across years.
Profit and loss statements (annual, monthly, and trailing twelve months/TTM). These statements tell the earnings story. Monthly detail reveals seasonality and one-time spikes.
Balance sheet. This document shows working capital, debt load, and the overall financial position of the practice.
Cash flow statement. This statement tests whether reported profit actually converts into cash.
Production and collections reports by provider and procedure. These reports show revenue quality, concentration risk, and how much of the practice depends on the selling owner.
Accounts receivable (A/R) aging report. This report tests collectibility using 0–30, 31–60, 61–90, and 90-plus day buckets.
Payroll registers and IRS Form 941 filings. These records reveal family members on payroll, above-market compensation, and the true cost of replacing the owner.
Provider and owner compensation detail. These details document what the owner earns versus what a market-rate replacement dentist would cost.
EBITDA add-back schedule with supporting documentation. This schedule is often the highest-impact document in the package, and every adjustment must be evidenced.
Debt, lease, and vendor contract schedules. These schedules surface obligations that reduce net proceeds and test whether the lease can be assigned to a new owner.

A dental buyer’s diligence request list typically runs to roughly 71 numbered items across financial, operational, legal, and clinical categories. Those items span many areas, but the 10 above form the financial core that can drive valuation. Getting these right before going to market is often where the sale price is effectively set.

Where a data package is weak, risk moves directly into price or deal structure. The goal of this checklist is to reduce that risk before a buyer can price it against you.

Have McLerran & Associates review your core financial documents.

The DSO Due Diligence Checklist, Staged: What To Share And When

Assembling the package is only half the job. How and when you release it can determine whether those documents protect your price or hand the buyer a repricing tool. A staged disclosure approach protects your leverage at each phase of the transaction.

First conversation (pre-NDA). Share only anonymized, high-level practice metrics such as revenue range, specialty, geography, and general size. Keep financials and practice identity back at this stage.
Pre-LOI (after NDA, during competitive bidding). Release the summary P&L, TTM collections, and high-level production data sufficient for buyers to submit indicative offers. At this stage you have competing bidders, which can be your maximum leverage point. Detailed A/R aging data and the full add-back schedule belong later. These documents are the most likely to be scrutinized and picked apart, and early release can hand the buyer a pricing tool before they commit to a number.
Formal diligence (post-LOI, during exclusivity). Open the full data room. This is when the complete document package, including 3 years of tax returns, monthly P&Ls, the add-back schedule with invoices, payroll registers, A/R aging, provider-level production, lease, and compliance files, is delivered in an indexed, organized format. Buyers typically expect diligence materials delivered in a data room with a clear index rather than as dozens of loose email attachments, and the structure of that delivery signals organization before anyone reads a single document.
Pre-closing. Provide final confirmations such as credentialing status, working capital true-up, lease assignment confirmation, and any outstanding representations. Thorough preparation earlier in the process can prevent new financial surprises at this stage.

The mechanism behind staged disclosure matters. Once exclusivity begins in a dental M&A deal, the seller’s negotiating leverage is greatly reduced because the buyer knows there are no competing offers on the table. And because the price in a dental LOI is typically non-binding, a diligence finding can be used to revisit it. Preparation, rather than last-minute negotiation, can be the most reliable defense against a re-trade.

Document By Document: What Each Financial Document Is Really Testing

Each document on the DSO due diligence checklist answers a specific underwriting question. Knowing what a buyer is actually looking for can help you prepare each item in a defensible way.

Tax returns. Buyers use tax returns mainly as a cross-check against reported income and as a consistency test across years. Buyers want to see 3 years of P&L statements and business tax returns because a single year can be misleading in either direction, and buyers want to see a growth, stability, or decline trend. Schedule C applies to sole practitioners, while S-corp or partnership returns apply to other structures. Discrepancies between tax returns and internal financials are among the most common diligence findings.

P&L statements (annual, monthly, and TTM). These statements provide the earnings narrative. Monthly P&Ls test whether earnings are steady or one good year is carrying two ordinary ones. A TTM (trailing twelve months) P&L gives buyers the most current picture of practice performance. Annual summaries alone rarely satisfy DSO underwriting, so monthly detail is usually required.

Balance sheet and cash flow statement. These documents test working capital adequacy, debt obligations, and whether reported profit turns into actual cash. Enterprise value in a dental sale is reduced by net debt, working-capital definitions, escrows, rollovers, seller notes, and transaction expenses before a seller sees actual proceeds at close. The balance sheet therefore directly affects what you walk away with.

Production and collections reports by provider and procedure. These reports answer two questions at once: how good the revenue is, and how concentrated it is in one person. Production and collections by provider test how much of the practice is the owner and how transferable the rest is. A practice where the selling owner generates the majority of collections introduces meaningful transition risk that buyers often price into their offers.

A/R aging report. This report functions as a collectibility test. The standard structure uses four buckets: 0–30, 31–60, 61–90, and 90-plus days. Directional benchmarks for a healthy dental practice A/R distribution are roughly 75–80% of total A/R in the 0–30 day bucket, a moderate share in 31–60 days, 8–12% in 61–90 days, and under 10–15% in the 90-plus day bucket. A bloated 90-plus bucket signals collectibility problems. Buyers often discount or exclude aged receivables from asset value, so cleaning up A/R before going to market can convert a discounted asset into cash at full value.

Payroll registers and IRS Form 941 filings. These records support the owner-dependency test. The payroll register is tested for family members on payroll, above-market pay, and what replacing the owner costs. Buyers model earnings after the seller steps back, so owner and associate compensation must be documented and normalized to market rates.

The EBITDA add-back schedule. EBITDA stands for Earnings Before Interest, Taxes, Depreciation, and Amortization, which is a measure of operating profitability that many DSO buyers use as a primary valuation driver. An add-back is an expense in the practice’s financial statements that a new owner genuinely would not incur, added back to reported profit to arrive at adjusted EBITDA. Buyers use different valuation methods by path: DSO and private equity deals are typically priced on a multiple of EBITDA, while doctor-to-doctor deals are typically priced as a percentage of revenue or a multiple of net cash flow, because collections measure activity rather than profitability.

Common add-back categories include owner compensation above market-rate replacement cost, personal expenses run through the business, one-time or non-recurring costs, and above-market rent paid to an owner-controlled building entity. Every add-back requires documentation. An add-back that can be described but not documented is worth nothing, while one with an invoice attached is worth its face value multiplied by the valuation multiple, with no partial credit. Supporting evidence can include invoices, canceled checks, payroll records, mileage logs, signed engagement letters, and market compensation references.

Get your add-back schedule reviewed before a buyer sees it.

Fix This Before The Buyer Sees It: Pre-Sale Financial Preparation For A Dental Practice

Unsupported add-backs and A/R aging problems are two areas that commonly trigger valuation haircuts during DSO diligence. Both areas can often be improved before going to market.

Add-back evidence. Build the add-back file covering 3 years, because buyers test whether a cost recurs across years. A line that looks isolated in a single year must be isolated across 3 to hold. Then attach a specific document to every claimed adjustment. If you cannot produce the document, remove the add-back from your own expectations now rather than discover the gap during diligence. An aggressive add-back schedule that partially collapses can cost more than a conservative one that holds. When buyers lose confidence in the adjustment story, they often lose confidence in the seller’s broader narrative, which can erode value across the whole transaction.

Collections reconciliation. Reconcile your practice-management software production and collections reports to your P&L line by line. Discrepancies between these two sources are a common diligence finding. Working with a dental-specific CPA to ensure the trailing twelve months of financial statements clearly reflect adjusted EBITDA with all legitimate add-backs documented in the 6 to 12 months before going to market can meaningfully reduce buyer friction.

Two additional pre-submission steps protect against a re-trade:

Read 3 years of monthly financials as a stranger would, flag any line that requires explanation, and resolve discrepancies before a buyer sees them.
Pull at least 2 to 3 A/R aging reports roughly 3 months apart. A well-run billing system produces stable profiles month to month, while a profile that drifts steadily older suggests follow-up is falling behind.

DSO Vs. Private Buyer: How Financial Document Demands Differ

DSO affiliations usually involve a deeper, lender-driven financial examination than doctor-to-doctor sales, and the document package reflects that difference. Financial and legal diligence is significantly more exhaustive in a DSO sale than in a doctor-to-doctor sale. A DSO buyer typically commissions a formal quality-of-earnings (QofE) review, which is a deep financial examination run by the buyer’s accountants that rebuilds earnings from source data rather than accepting the seller’s statements at face value. A private buyer purchasing a single-doctor practice through SBA financing often conducts a more streamlined review, relying on tax returns and a summary P&L rather than a full QofE.

DSO buyers also request provider-level production detail, payer mix analysis, credentialing files, and compliance documentation that private buyers rarely require. The volume and specificity of the request reflect the fact that DSO acquisitions are often financed by institutional capital with its own underwriting standards. Because McLerran & Associates works both transition paths in roughly equal measure, clients receive a genuine side-by-side comparison of what each path demands and what each path is worth before committing to either.

How McLerran & Associates Prepares These Financial Documents Defensibly

McLerran & Associates is a dental-specific, sell-side advisor that prepares these financial documents so they can hold under buyer scrutiny, and the firm represents only the seller, never the buyer. Every engagement is built on a CPA-led, diligence-grade EBITDA analysis completed before the practice goes to market, so the numbers are less likely to be re-traded when a buyer’s quality-of-earnings team reviews them.

The firm’s approach to the add-back schedule is to unpack every discretionary, personal, and non-recurring expense up front, attach supporting evidence to each adjustment, and build the bridge from reported profit to buyer-accepted adjusted EBITDA before the first buyer conversation. That preparation can help keep valuations from being revised downward after exclusivity eliminates competing bidders.

The numbers behind the approach include roughly 2,000 successful practice sales, approximately $2 billion in closed transaction volume, more than 10,000 practices evaluated, and a transaction rate of roughly 85–90%, compared to an industry norm closer to 35–40%. That transaction rate reflects what can happen when the financial documentation is built to withstand scrutiny rather than assembled reactively during diligence.

For owners weighing both paths, McLerran produces a side-by-side valuation that quantifies the practice’s worth in both the private-buyer and DSO markets. This comparison helps the decision rest on full information rather than a single buyer’s framing.

DSO Buyer Requirements for Dental Practices (2026) and How to Prepare Your Financials for a DSO Sale provide additional context on what buyers expect and how to position your practice before going to market.

Frequently Asked Questions

How Many Years Of Tax Returns And P&Ls Do DSO Buyers Want?

DSO buyers typically request 3 years of federal tax returns and 3 years of profit and loss statements, including monthly breakdowns for each year and a trailing twelve months (TTM) P&L. Three years of data can help buyers test whether earnings are growing, stable, or declining, and can verify that any claimed one-time expenses are genuinely isolated rather than recurring. A single year of financials rarely satisfies DSO underwriting. Sellers who begin assembling these records well before going to market can avoid the delays and leverage loss that come from reconstructing statements mid-diligence.

What Is An Add-Back Schedule And Why Does It Affect Valuation?

An add-back schedule is a document that lists every expense in the practice’s financial statements that a new owner would not incur, along with the supporting evidence for each adjustment. These adjustments are added back to reported net income to arrive at adjusted EBITDA, which is the figure many DSO buyers use to calculate your practice’s value. Because practice value is often calculated as adjusted EBITDA multiplied by a market multiple, every dollar of documented add-back can be worth several dollars of enterprise value. An add-back that cannot be supported by an invoice, payroll record, or other contemporaneous document is typically disallowed during diligence, which reduces adjusted EBITDA and therefore reduces the purchase price by a multiple of the disallowed amount. Common add-backs include owner compensation above the market cost of a replacement dentist, personal expenses run through the business, one-time legal or professional fees, and above-market rent paid to an owner-controlled entity. Each category requires documentation, because a verbal explanation alone rarely holds in diligence.

What A/R Aging Reports Do DSO Buyers Request?

DSO buyers usually request A/R aging reports sorted into four standard buckets, 0–30, 31–60, 61–90, and 90-plus days, often broken out separately for insurance balances and patient balances. Buyers use these reports to test whether reported collections are real and recoverable. A healthy aging profile is front-weighted, with the large majority of outstanding balances in the 0–30 day bucket and progressively smaller amounts in each older bucket. A large 90-plus day bucket signals collectibility problems, because balances in that range have a substantially reduced probability of collection, and buyers may discount or exclude aged receivables from asset value. Sellers can benefit from pulling multiple aging reports several months apart before going to market, cleaning up old balances, and ensuring the profile is stable and defensible before a buyer sees it.

What Documents Do DSO Buyers Request After The LOI?

After the LOI is signed and exclusivity begins, the buyer opens formal diligence and requests the complete document package. This package typically includes the full 3 years of monthly P&Ls and tax returns, the EBITDA add-back schedule with all supporting invoices and records, detailed A/R aging reports, payroll registers and IRS Form 941 filings, provider-level production and collections reports, the practice lease and any amendments, equipment schedules, associate and employment agreements, credentialing files, compliance documentation (HIPAA, OSHA, DEA), and entity records. The buyer’s accountants will run a quality-of-earnings review that rebuilds earnings from source data, and the buyer’s attorneys will examine legal documents in parallel. Practices with clean, indexed records in a data room often finish diligence faster and with less re-trade risk than those whose records must be reconstructed mid-process.

Should I Share Financials Before Signing An LOI?

A limited set of financial information, such as summary P&L, TTM collections, and high-level production data, is often appropriate to share before an LOI, after a confidentiality agreement is in place, to allow buyers to submit competitive offers. Detailed A/R aging data, the full add-back schedule, and provider-level production detail are usually better reserved for formal diligence after an LOI is signed. The sequencing protects leverage, as described above, with competing bidders before an LOI and a single buyer after exclusivity. Working with a sell-side advisor who controls the disclosure sequence on your behalf can be one of the most effective ways to protect against over-disclosure and the re-trades it can enable.

How Do Document Demands Differ Between A DSO And A Private Buyer?

A DSO acquisition usually involves a significantly heavier document package than a doctor-to-doctor sale. DSO buyers typically commission a formal quality-of-earnings review, request provider-level production detail for 24 to 36 trailing months, require credentialing and compliance files, and examine payer mix and fee schedules in depth. Private buyers purchasing through conventional or SBA financing typically rely on 3 years of tax returns, a summary P&L, and a practice-management software report, with a more streamlined review process. The difference reflects the institutional nature of DSO underwriting, where DSO acquisitions are often financed by private equity or institutional lenders with their own documentation standards, versus the individual buyer who is underwriting a single practice they plan to operate themselves. Sellers considering both paths can benefit from understanding these differences before deciding which market to pursue.

Conclusion: Build Your Financial Package Before The First Buyer Call

The financial documents DSO buyers request follow a predictable pattern, the sequence in which you release them can be planned, and the two preparation fixes that most protect against a re-trade, documented add-back evidence and a clean A/R aging profile, are often addressable before any buyer conversation begins. The master checklist covers 10 core document categories. The staged disclosure timeline can protect your leverage at each phase. The pre-submission fixes focus on the areas where weak documentation most often triggers a valuation haircut.

A defensible financial package depends on the evidence behind each document and on the advisor who builds that evidence before the buyer’s accountants arrive. That same CPA-led process, the one behind the firm’s track record noted above, is designed so valuations can hold under buyer scrutiny and deals are less likely to be re-traded.

Start building your diligence-ready financial package with McLerran & Associates.