Guide
What is marketing due diligence in private equity? A complete guide for sponsors and operators
Marketing due diligence is the workstream that used to be a slide. In 2026 it's a full commercial review — sized to fit inside the LOI window and producing an IC-ready EBITDA bridge. Here's what it covers, when to run it, what it costs, and what you actually get out of it.
If you've spent any time around private equity, you know what commercial due diligence looks like, what financial due diligence looks like, and roughly what operational due diligence looks like. Marketing due diligence is the newest member of the family — and the one most deal teams under-scope.
This guide is the plain-English version: what marketing due diligence is, what it covers, when sponsors run it, what it costs, and what the output looks like. If you're new to it, this should be enough to scope your first engagement intelligently. If you're a seasoned operator, this is the conversation you've been having with your IC for the last three quarters anyway.
What is marketing due diligence?
Marketing due diligence is a commercial review of a target company's marketing engine — its channels, spend efficiency, attribution methodology, lead quality, vendor concentration, brand equity, and operational maturity. It's run as a discrete workstream alongside commercial, operational, and financial DD on a platform investment.
The output is an IC-ready memo with a quantified EBITDA bridge: what's recoverable in the first 18 months, what's structural, and what the 100-day plan looks like in dollars. Done right, it can re-price the bid, inform deal structure, or surface deal-killing issues before exclusivity locks the sponsor in.
What's included in a marketing due diligence sprint?
A credible marketing DD covers seven workstreams. Each is sized to fit inside the LOI window and produce a discrete output for the deal team.
- Spend efficiency review — channel-by-channel analysis against sourced revenue, not impressions or clicks
- Attribution integrity audit — what the data actually proves vs. what reporting claims
- Lead quality and disposition analysis — across CRM, dialer, and dispatch systems
- Vendor concentration and contract map — with exit clauses, scope overlap, and renewal cycles
- Brand equity baseline — competitive share-of-voice, branded search trend, review velocity, local pack visibility
- Operational marketing maturity scoring — tooling, talent, and operating cadence vs. platform benchmarks
- EBITDA bridge synthesis — recoverable, structural, and the 100-day plan, modeled in dollars
When should sponsors run marketing due diligence?
Pre-LOI, in parallel with commercial DD. This is the only window in which findings can affect the bid, the structure, or the decision to walk. By the time the wire clears, the bid is committed — marketing DD in the first sixty days post-close is still valuable, but it can only inform value creation, not the deal itself.
The second-best cadence is a sixty-day post-close sprint run as the first move of the value-creation engagement. The third is the implicit one most platforms run by accident — discovering what the marketing function looks like over the first six months while the value-creation clock runs.
What does marketing due diligence cost?
A 3-4 week pre-LOI sprint typically prices at $35,000-$90,000 for a single-portco target, scaling up for multi-DMA roll-ups or add-on platforms with complex acquired histories. The cost is small relative to the EBITDA delta typical findings move — vendor consolidation alone often returns 5-10x the diligence fee in the first 18 months of hold.
More importantly, deal-killing findings show up roughly 10-15% of the time. Vendor contracts the seller can't exit. Attribution failures that make the topline unverifiable. Brand-equity erosion across DMAs that re-prices the exit thesis. Catching any one of those before exclusivity is worth several multiples of the diligence cost.
Who runs marketing due diligence?
Until recently, marketing DD was often bolted onto commercial DD by generalist consultants — which is why most sponsors got a slide instead of a real review. In 2026, specialist marketing-DD providers (Sheppard among them) conduct the work as a discrete workstream alongside the commercial DD provider and produce IC-ready outputs.
For home services platforms specifically, sponsors should engage a provider with trade-native depth — not a generalist marketing consultancy. The unit economics of HVAC, plumbing, and electrical platforms are specific enough that generic frameworks produce generic findings.
What output does a sponsor actually get?
Three artifacts. An IC-ready memo with an executive summary the committee can read in five minutes. A detailed appendix with the seven-workstream findings, sized so the operating partner can hand it directly to the portco CEO. And the EBITDA bridge — modeled, sourced, and defensible.
If a marketing diligence engagement doesn't produce a quantified EBITDA delta, it wasn't diligence. It was a brand review. Those have their place, but not at the deal-team table.
Marketing due diligence is the workstream that earns its keep when it re-prices the bid, kills a deal, or hands the operating partner a documented 100-day plan on Day 1.