Bottom line: Marketing due diligence is a pre-close assessment of a target company’s demand-generation engine, how predictably and efficiently it actually produces pipeline and new customers, run alongside commercial due diligence to test whether the growth in the value-creation plan is genuinely reachable. Commercial due diligence tells you the market is attractive; marketing due diligence tells you whether this specific company can capture it, or whether its growth is quietly riding on one channel, one salesperson, or the founder’s phone. In a market where revenue growth now drives most of the return, that is the difference between a value-creation plan and a hope.
Key Facts at a Glance
- In 2026, private equity operates in what Bain calls a “12 is the new 5” environment: deals that once penciled out on single-digit earnings growth now require roughly 10 to 12% annual EBITDA growth to hit target returns (Bain & Company, Global Private Equity Report 2026).
- Revenue growth accounted for about 71% of the value created in 2024 buyout exits, up from 64% in 2023, making top-line growth the dominant value-creation lever rather than multiple expansion or leverage (Bain & Company, 2026).
- For deals done between 2010 and 2022, leverage and multiple expansion drove 59% of returns; the remaining 41% came from revenue growth and margin expansion, and the next decade is expected to rely far more heavily on operational value creation (StepStone analysis, via McKinsey Global Private Markets Report 2026).
- McKinsey advises buyout managers to run operational value-creation diligence alongside strategic diligence, assessing top-line efficiency, with the operating team involved during the diligence phase rather than only after close (McKinsey & Company, “Bridging Private Equity’s Value Creation Gap,” 2024).
- Commercial excellence, which includes marketing and sales effectiveness, is one of the primary drivers of organic top-line growth in PE portfolios; Bain has found that roughly 60% of companies have not focused their value proposition on their most critical target accounts (Bain & Company commercial excellence research).
- Customer and revenue concentration is already a recognized diligence risk: when a large share of revenue depends on a single customer, channel, or relationship, that exposure is factored into valuation and deal structure (Carta, 2026).
- Holding periods now average more than six and a half years, the longest since 2005, so the demand engine a fund inherits at close has to carry growth for longer than it used to (McKinsey Global Private Markets Report 2026).
This guide draws on Peter Geisheker’s 20-plus years of B2B marketing experience as founder and CEO of The Geisheker Group, Inc., a fractional CMO agency serving B2B, B2B SaaS, PE/VC-backed, and law firm clients. Peter has personally managed more than $50 million in annual advertising spend and has built the kind of demand-generation systems this article describes assessing; documented outcomes include 6X inbound lead growth and a 77% reduction in paid acquisition cost while revenue grew. The perspective here is an operator’s, not a deal advisor’s: it reflects what actually breaks and what actually scales inside a portfolio company’s marketing engine, informed by 2026 private-equity value-creation research from Bain, McKinsey, and others.
Table of Contents
- What Is Marketing Due Diligence?
- Why Does Commercial Due Diligence Miss the Demand Engine?
- What Does “12 Is the New 5” Mean for the Marketing You Inherit?
- What Does a Marketing Due Diligence Assessment Actually Cover?
- What Are the Red Flags a Marketing Due Diligence Surfaces?
- How Is Marketing Due Diligence Different From Commercial Due Diligence?
- When in the Deal Process Should You Run It?
- Who Should Run Marketing Due Diligence?
- Frequently Asked Questions
What Is Marketing Due Diligence?
Marketing due diligence is a pre-close assessment of a target company’s demand-generation engine, the actual machine that turns marketing and sales activity into pipeline and new customers, focused on how predictably, efficiently, and durably that machine produces growth. It sits alongside commercial due diligence, but it points the lens in the opposite direction. Commercial due diligence looks outward at the market; marketing due diligence looks inward at the company’s ability to win in that market on purpose rather than by luck.
The distinction matters because a target can pass commercial due diligence with flying colors and still be a poor growth bet. The market can be large, growing, and under-penetrated, the customer interviews can come back glowing, and the competitive moat can look real, while the company’s own ability to acquire the next thousand customers rests entirely on the founder’s relationships or a single paid channel that is quietly getting more expensive every quarter. That is not a market problem. It is a demand-engine problem, and it is invisible to a study that never opens up the acquisition machine and looks inside.
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Why Does Commercial Due Diligence Miss the Demand Engine?
Commercial due diligence is very good at what it is designed to do. It maps the market, sizes the opportunity, interviews customers, stress-tests the competitive position, and challenges whether the business plan is achievable given the industry dynamics. The standard scope covers market growth, segmentation, customer retention and concentration, and the target’s go-to-market strategy at a strategic level. Done well, it answers the question every deal team is asking: is this a good market, and is the plan credible?
What it rarely does is audit the operational marketing engine the way an operator would. It treats go-to-market as a strategy slide, not as a working system with measurable inputs and outputs. It seldom pulls CAC by channel over the last eight to twelve quarters, traces exactly where new pipeline originates, or asks whether the company could even attribute its own results if pressed. This is not a criticism of commercial diligence providers; it is a scope boundary. The strategy consultants who run most commercial due diligence, firms like EY-Parthenon, L.E.K., and OC&C, are market analysts, not demand-generation operators, and the two skill sets are genuinely different.
McKinsey has been explicit that this gap is worth closing. In its guidance on bridging the value-creation gap, McKinsey argues that buyout managers should run operational value-creation diligence in addition to strategic diligence, assessing top-line efficiency, and that the operating team should be involved during the diligence phase rather than parachuting in after the deal closes (McKinsey & Company, 2024). Marketing due diligence is a piece of exactly that operational assessment, aimed squarely at the top-line engine.
What Does “12 Is the New 5” Mean for the Marketing You Inherit?
Bain’s 2026 framing, that “12 is the new 5,” captures why this gap now costs real money. With cheap debt gone and multiple expansion largely spent, deals that used to work on single-digit earnings growth now need something closer to 10 to 12% EBITDA growth to deliver the same return (Bain & Company, Global Private Equity Report 2026). The industry has shifted accordingly: revenue growth drove roughly 71% of the value created in 2024 exits, up from 64% a year earlier (Bain & Company, 2026), and for deals done between 2010 and 2022, StepStone found that leverage and multiple expansion supplied 59% of returns while revenue and margin growth supplied the other 41%, a share expected to rise sharply in the decade ahead (via McKinsey Global Private Markets Report 2026).
Put those together and the conclusion is uncomfortable. The return math now depends on organic revenue growth, and organic revenue growth depends on the demand engine, yet the demand engine is the one part of the business most deal processes never actually inspect. Bain’s own research points the same direction, identifying commercial excellence, which includes marketing and sales effectiveness, as a primary driver of organic top-line growth in PE portfolios, while noting that roughly 60% of companies have not even focused their value proposition on their most critical target accounts (Bain & Company commercial excellence research). With holding periods now averaging more than six and a half years (McKinsey Global Private Markets Report 2026), the demand engine you inherit at close is the demand engine that has to carry the plan for a long time. It is worth knowing, before you sign, whether it can.
What Does a Marketing Due Diligence Assessment Actually Cover?
A marketing due diligence assessment opens up the acquisition machine and answers one question in detail: can this company’s own demand engine produce the growth the value-creation plan assumes, and at what cost? The assessment Peter Geisheker runs for this purpose works through the following areas.
Pipeline sourcing and channel concentration. Where does new pipeline actually come from, broken out by channel, and how concentrated is it? A company generating 80% of its pipeline from a single source, whether that is one paid account, one organic ranking, one partner, or one salesperson, carries the marketing equivalent of customer concentration risk. It looks like growth until the source moves.
CAC and CAC payback by channel, over time. Not a single blended number, but customer acquisition cost and payback period by channel across the last eight to twelve quarters. Rising CAC on flat conversion is the clearest early warning that a growth curve is about to flatten, and it almost never shows up in a market study.
Rented versus owned demand. How much of the pipeline is rented (paid media that stops the day the budget stops) versus owned (brand, organic search, referral, community, an engaged audience)? Rented demand can look identical to owned demand on a dashboard and behaves nothing like it after close.
Founder and rainmaker dependence. How much of the pipeline traces back to the founder’s personal network or one or two key relationships? This is the single most common post-close growth surprise: the demand that made the company attractive walks out with the founder or slows the moment their attention shifts to the earn-out.
Measurement and attribution maturity. Can the company attribute its own results at all, or is it flying blind and calling it intuition? A company that cannot tell you where its customers came from cannot reliably scale acquisition, and cannot be trusted when it tells you where growth will come from next.
Retention, expansion, and revenue quality. Net revenue retention and churn by cohort, because acquisition efficiency is meaningless if the bucket leaks. This is where marketing due diligence overlaps with the revenue-quality work a good deal team already values.
Team and leadership capability. Is there an actual marketing strategist, or a coordinator running tactics with nobody doing strategy above them? A capable team with no leader is a fixable gap; a plan that assumes senior marketing capability the company does not have is a mispriced one.
AI and brand visibility. A 2026 addition that is quickly becoming decisive: does the company appear when buyers ask AI engines like ChatGPT, Perplexity, and Google’s AI Overviews for recommendations in its category? Increasingly, B2B buyers build their shortlist from AI answers before anyone fills out a form, and a company that is invisible in that layer has a demand ceiling that no amount of paid spend will lift.
The forecast stress test. Finally, the one that ties it together: does the growth in the value-creation plan require the demand engine to do something it has never done, and at what CAC? A plan that quietly assumes the company will suddenly triple its best-ever pipeline output, at its current acquisition cost, is not a plan. It is a number.
What Are the Red Flags a Marketing Due Diligence Surfaces?
Some findings should change the price, the structure, or the first 100 days. The recurring red flags worth pricing in:
A single channel or single person supplying the majority of pipeline is the demand-engine version of customer concentration, and concentration is already something diligence teams factor into valuation and deal structure (Carta, 2026). Growth that is entirely paid, with no owned demand underneath it, means the moment you optimize for cash the pipeline contracts. A steadily rising CAC on flat conversion means the current number is a peak, not a baseline. No attribution or measurement means every growth claim in the CIM is unverifiable. And a marketing function that is all tactics and no strategy means the value-creation plan is assuming a capability that will have to be built or bought before the growth can start. None of these necessarily kills a deal. All of them should be known before close, not discovered in month four.
How Is Marketing Due Diligence Different From Commercial Due Diligence?
The two are complementary, not competing. Commercial due diligence validates the market and the thesis; marketing due diligence validates the machine that has to deliver against that thesis. The clearest way to see the difference:
| Dimension | Commercial Due Diligence | Marketing Due Diligence |
|---|---|---|
| Core question | Is the market attractive and the plan achievable? | Can this company’s own demand engine actually produce the planned growth? |
| Primary lens | Market, competitors, customers (outside-in) | The company’s acquisition machine (inside-out) |
| Typical evidence | Market sizing, customer interviews, competitor analysis | CAC by channel, pipeline sourcing, channel concentration, attribution data |
| Who runs it | Strategy consultants (EY-Parthenon, L.E.K., OC&C, and similar) | An operator who has built demand systems, such as a fractional CMO |
| Output | Validates or challenges the market thesis | Validates or challenges the growth mechanics and prices the risk |
| When it pays off most | Deciding whether to bid, and how much | The first 100 days and the entire hold period |
Run together, they answer both halves of the real question: is this a good market, and can this specific company win in it on purpose? A yes on the first and a no on the second is exactly the deal that looks great at signing and disappoints at exit.
When in the Deal Process Should You Run It?
Marketing due diligence belongs pre-close, in parallel with commercial and financial diligence, for two reasons. First, what it finds should inform the price and the structure; a demand engine that is 80% founder-sourced is a different asset than one with a diversified, measured acquisition system, and the value-creation plan should reflect that before you sign, not after. Second, the assessment doubles as the first draft of the 100-day marketing plan. The same audit that tells you whether to worry also tells you exactly what to fix first, which means the operating team walks in on day one already knowing where the growth engine is weak. McKinsey makes this point directly: the operating team should be involved during diligence, not after it (McKinsey & Company, 2024). Marketing due diligence is how the marketing side of that operating work starts early.
For funds pursuing buy-and-build, this compounds. When you run the same marketing due diligence lens across every add-on, you build a repeatable read on demand-engine quality that gets sharper with each deal, and you stop overpaying for growth that turns out to be one person’s rolodex.
Who Should Run Marketing Due Diligence?
Here is the honest answer, including when you do not need outside help. If your fund has an operating partner or portfolio-operations team with genuine demand-generation experience, someone who has actually built and scaled a B2B acquisition system rather than managed agencies, they can run this. Many funds do not have that specific capability in house, because it is a different skill than the financial and operational diligence they excel at, and it is rarely worth a full-time hire at the fund level.
That is the gap a fractional CMO for portfolio companies fills, brought in as a diligence resource to the firm rather than as a placement in any one portfolio company. It is a low-commitment way to add demand-engine assessment to your process on the deals where organic growth carries the thesis, and it dovetails with the broader question of how private equity firms use fractional CMOs across the hold period. The point is not to add a workstream for its own sake. It is to stop underwriting revenue growth you have never actually inspected.
Frequently Asked Questions
What is marketing due diligence in private equity?
Marketing due diligence is a pre-close assessment of a target company’s demand-generation engine: how predictably and efficiently it produces pipeline and new customers, how concentrated or diversified that production is, and whether it can realistically deliver the growth in the value-creation plan. It runs alongside commercial due diligence but examines the company’s own acquisition machine rather than the market around it.
How is marketing due diligence different from commercial due diligence?
Commercial due diligence looks outward at the market, competitors, and customers to judge whether the opportunity is attractive and the plan is achievable. Marketing due diligence looks inward at the company’s demand engine to judge whether this specific business can capture that opportunity on purpose. One validates the thesis; the other validates the machine that has to deliver it.
Why does marketing due diligence matter more in 2026?
Because the return math has changed. With cheap debt and multiple expansion largely gone, revenue growth now drives most of the value created in exits, roughly 71% in 2024 per Bain, and Bain’s “12 is the new 5” framing means deals need double-digit EBITDA growth to work. Organic revenue growth depends on the demand engine, so inspecting that engine before close has gone from optional to central.
What does a marketing due diligence assessment look at?
It covers pipeline sourcing and channel concentration, CAC and CAC payback by channel over time, the mix of rented versus owned demand, founder or rainmaker dependence, measurement and attribution maturity, retention and revenue quality, marketing team and leadership capability, AI and brand visibility, and a stress test of whether the value-creation plan’s growth is actually reachable at the company’s real acquisition cost.
When should marketing due diligence happen in the deal?
Pre-close, in parallel with commercial and financial diligence, so the findings can inform price and structure. The assessment also doubles as the first draft of the 100-day marketing plan, so the operating team starts the hold period already knowing where the demand engine needs work.
Can our existing commercial due diligence provider do this?
Usually not at the depth that matters, and it is not a knock on them. Commercial diligence firms are market analysts; marketing due diligence requires an operator who has built and scaled demand-generation systems and can read a company’s acquisition machine from the inside. They are complementary specialties, not substitutes.
Do we need this on every deal?
No. It earns its place on deals where organic revenue growth carries the thesis, which, given where value creation now comes from, is most of them. On a deal where the return is driven by margin work or multiple arbitrage, it matters less. The filter is simple: if your value-creation plan assumes the company will grow the top line, inspect the engine that has to produce that growth.
Turning Diligence Findings Into a Growth Engine
Most deal teams grasp the logic of marketing due diligence immediately. The harder part is running it well, pulling the real CAC-by-channel history, tracing pipeline to its true sources, separating rented demand from owned, and stress-testing the plan’s growth against what the engine has actually produced, then translating those findings into a 100-day plan the operating team can execute.
That assessment work, and the build that follows it, is fractional CMO work. If your fund has in-house demand-generation depth, you may not need outside help. If your situation is the common one, strong deal and operations teams but no one who has personally built a B2B acquisition system, a short conversation will tell us whether adding a marketing due diligence lens to your process, and a growth engine to the companies you buy, is something we can help with. This is the same operator perspective behind our broader private equity marketing strategy work and our private equity marketing agency engagements.
About Peter Geisheker
Peter Geisheker is a fractional CMO and founder and CEO of The Geisheker Group, Inc., serving B2B, B2B SaaS, and PE/VC-backed companies. He has managed more than $50 million in annual advertising spend and specializes in building capital-efficient, measurable demand-generation systems, the kind of acquisition engines that marketing due diligence is designed to assess. With 20-plus years of experience translating marketing into revenue and enterprise value, Peter provides senior marketing leadership to portfolio companies and their sponsors without the cost of a full-time executive hire.
Ready to add a demand-engine assessment to your diligence process? Schedule a free consultation with Peter Geisheker. Connect with Peter on LinkedIn.
References and Sources
- Bain & Company, “Global Private Equity Report 2026”: the “12 is the new 5” environment; deals now require roughly 10 to 12% EBITDA growth; revenue growth drove about 71% of value created in 2024 exits, up from 64% in 2023. https://www.bain.com/insights/topics/global-private-equity-report/
- Bain & Company, “Private Equity Outlook 2026: Gaining Traction”: multiple expansion and cheap debt have waned; returns now depend on rapid EBITDA growth at portfolio companies. https://www.bain.com/insights/outlook-gaining-traction-global-private-equity-report-2026/
- McKinsey & Company, “Bridging Private Equity’s Value Creation Gap” (2024): run operational value-creation diligence alongside strategic diligence; involve the operating team during the diligence phase. https://www.mckinsey.com/industries/private-capital/our-insights/bridging-private-equitys-value-creation-gap
- McKinsey & Company, “Global Private Markets Report 2026: Private Equity”: StepStone finding that 2010 to 2022 deals drew 59% of returns from leverage and multiple expansion and 41% from revenue and margin growth; holding periods above six and a half years; full-potential diligence and revenue quality. https://www.mckinsey.com/industries/private-capital/our-insights/global-private-markets-report/private-equity
- Bain & Company, “How Commercial Excellence Jump-Starts Growth in Private Equity”: commercial excellence (marketing and sales effectiveness) as a primary organic top-line growth lever; roughly 60% of companies have not focused their value proposition on critical target accounts. https://www.bain.com/insights/how-commercial-excellence-jump-starts-growth-in-private-equity/
- Carta, “Private Equity Due Diligence: How to Evaluate Deals”: customer and revenue concentration as a diligence risk factored into valuation and deal structure. https://carta.com/learn/private-funds/management/deal-flow/due-diligence/
- L.E.K. Consulting, “Commercial Due Diligence”: standard commercial due diligence scope, covering market dynamics, customer interviews, competitive landscape, and challenging the management business plan. https://www.lek.com/industries/private-equity-pe/commercial-due-diligence-cdd
- Affinity, “Private Equity Due Diligence: How to Do It Right”: the five areas of PE due diligence and the volume of deals screened per investment; 2026 dry-powder levels. https://www.affinity.co/guides/private-equity-due-diligence-how-to-conduct-it-properly
- McKinsey & Company, “Pricing: The Next Frontier of Value Creation in Private Equity”: commercial productivity, including pricing and the marketing-sales feedback loop, as an underused value-creation lever. https://www.mckinsey.com/capabilities/growth-marketing-and-sales/our-insights/pricing-the-next-frontier-of-value-creation-in-private-equity
- McKinsey & Company, “Value Creation: The Impact Counts, Not the Plan” (2025): operational value creation as the most controllable source of new value; funds prioritizing it achieved higher IRR on average. https://www.mckinsey.com/uk/our-insights/uk-insights/value-creation-the-impact-counts-not-the-plan
- Chronograph, “Bain 2025 Private Equity Report: Key Takeaways”: North American buyout multiples near 11.9x EBITDA; margin expansion alongside revenue growth increasingly critical. https://www.chronograph.pe/top-takeaways-from-bains-2025-private-equity-report/
- Moonfare, “Five Takeaways From Bain’s PE Outlook” (2026): revenue growth accounted for 71% of value created in 2024 exits, up from 64% in 2023; operational improvement has displaced financial engineering. https://www.moonfare.com/blog/bain-outlook-2026-moonfare
