You’re weeks into diligence on what looks like a solid deal. The financials check out. EBITDA’s growing. Management’s optimistic. Then your QofE advisor drops a bomb: 40% of last year’s revenue was from a customer contract that’s not renewing.
Sound familiar?
Here’s the thing, most buyers think a Quality of Earnings report is the gold standard for M&A diligence. And they’re not wrong. But in 2026, we’re seeing more sophisticated buyers dig even deeper with Quality of Revenue analysis. The question isn’t whether you need diligence. It’s whether you’re asking the right questions to actually protect your investment.
Let’s break down what each approach really tells you, and more importantly, what it doesn’t.
Quality of Earnings: The M&A Standard Bearer
Quality of Earnings has been the cornerstone of M&A diligence for decades, and for good reason. A QofE report goes beyond what audited financials tell you. While auditors confirm that numbers comply with GAAP, QofE analysts ask: “Are these earnings real, sustainable, and repeatable?”
A typical QofE analysis examines:
Earnings adjustments and normalization. This strips out one-time events, non-recurring items, and owner discretionary expenses that won’t transfer post-acquisition. That $2M in “consulting fees” paid to the seller’s brother-in-law? Yeah, that gets added back.
Working capital trends. How much cash is actually tied up in the business? Are receivables aging? Is inventory turning?
Revenue recognition policies. Are they booking revenue when they should? Any aggressive accounting that needs unwinding?
EBITDA quality. What’s the true cash-generating ability of the business after you normalize everything?
The beauty of QofE is that it’s both backward and forward-looking. It doesn’t just validate historical performance: it helps predict future earning power. That’s critical when you’re building your valuation model and deciding how much to pay.
Quality of Revenue: The Deeper Dive
Now here’s where things get interesting. Quality of Revenue analysis takes a different angle. Instead of starting with the bottom line and working up, QofR starts at the very top: with how the company actually makes money.
Think of it this way: QofE tells you if the earnings are real. QofR tells you if the revenue engine is built to last.
A comprehensive QofR analysis looks at:
Revenue composition and concentration. What percentage comes from your top customer? Top three? Top ten? If 60% of revenue walks out the door with one logo, you’ve got a problem: regardless of how clean the EBITDA looks.
Customer retention and cohort analysis. What’s the churn rate? Are customers growing their spend over time or shrinking? New customer acquisition vs. existing customer expansion tells you a lot about product-market fit.
Contract structure and durability. Are these month-to-month agreements or multi-year contracts? What’s the backlog? Are there auto-renewals or do customers need to actively re-up each cycle?
Revenue drivers and unit economics. What actually drives revenue growth? Is it volume, price, mix, or something else? How does that break down by segment, geography, or product line?
Collectibility and billing quality. This is especially crucial in healthcare, government contracting, or any business with complex billing. Revenue that’s booked but not collectible is just fiction.
So Which One Actually Protects Your Investment?
Here’s the honest answer: you need both, but for different reasons.
QofE protects you from overpaying. It ensures the historical earnings you’re underwriting are legitimate and that your valuation multiple is applied to the right adjusted EBITDA number. Without solid QofE, you’re flying blind on price.
QofR protects you from buying a deteriorating asset. It reveals whether the revenue model is sustainable, defensible, and capable of supporting your growth thesis. You can have pristine earnings today that evaporate in 18 months if the underlying revenue drivers are weak.
Consider a SaaS business with $10M in ARR and beautiful EBITDA margins. QofE might show clean financials. But QofR could reveal that 70% of that ARR is from legacy customers on old contracts, renewal rates are dropping, and new logo acquisition has stalled. You’re not buying a growth asset: you’re buying a melting ice cube with nice margins.
Or take a manufacturing company with consistent earnings but heavy customer concentration. QofE validates the numbers. QofR exposes that your entire investment thesis hinges on one contract that’s up for rebid in six months.
As Bass Zanjani, Crescent Capital Advisors Board Advisor puts it: “Too many buyers focus exclusively on whether the earnings number is accurate without understanding what’s actually driving those revenues in the first place. You can have perfectly audited, well-adjusted EBITDA that’s built on quicksand. We always tell our clients: understand the revenue engine first, then validate the earnings. Not the other way around.”
The Practical Reality for PE Firms and Sponsors
Here’s what we’re seeing in the market right now. Traditional QofE remains non-negotiable for any serious transaction. Lenders require it. Your LP’s expect it. It’s table stakes.
But the smartest buyers: particularly independent sponsors and family offices who are writing big checks relative to their capital base: are layering in focused QofR analysis on deals where:
- Customer concentration is high (>20% from top customer)
- The business model has shifted recently (product launches, new markets, pricing changes)
- Revenue recognition is complex (subscription, project-based, milestone billing)
- There’s high churn or the cohort data looks wonky
- Management’s projections seem disconnected from historical trends
You don’t always need a full-blown standalone QofR workstream. Often, a good QofE provider will cover some of these elements. But you need to explicitly ask for it and make sure the scope is clear upfront.
What This Means for Your Next Deal
If you’re evaluating a platform investment right now, here’s your action plan:
Don’t assume your QofE covers revenue quality. Review the scope carefully. If customer concentration, cohort analysis, and contract durability aren’t explicitly included, they won’t be covered.
Ask the seller for customer-level data early. Revenue by customer, retention rates, and contract terms should be part of your initial diligence request. If they push back, that’s a red flag.
Pressure-test the revenue growth story. Management will tell you they’re growing because the product is great and the market is hot. Your job is to figure out if it’s actually sustainable unit economics, successful new product launches, or just one great salesperson who might not stick around.
Connect revenue quality to your investment thesis. If your thesis is built on cross-selling, you better understand current wallet share. If it’s geographic expansion, you need to see proof that the model works outside the home market.
The goal isn’t to kill deals: it’s to underwrite them correctly. Better to walk away from a shaky revenue model than to discover the problem post-close when you’re already on the hook.
The Bottom Line
Quality of Earnings makes sure you’re not overpaying for fictitious earnings. Quality of Revenue makes sure you’re not buying a business that’s already broken: you just don’t know it yet.
In an environment where multiples are still elevated and financing markets remain selective, you can’t afford to skip either. The deals that blow up aren’t usually the ones with accounting fraud. They’re the ones where buyers validated the historical numbers but never questioned whether the underlying revenue model could actually deliver on the growth projections.
Do the work upfront. Understand both the quality of what’s been earned and the durability of how it’s being earned. Your future self: and your investors: will thank you.
Want to discuss how we approach diligence on your next deal? Reach out to our team at Crescent Capital Advisors. We help PE firms, independent sponsors, and family offices structure smarter deals with clearer risk profiles.
