Composite case. Details have been altered to preserve privacy while retaining the structural pattern.
Eighteen months into the hold period, the PE-backed company had added $14M in ARR and lost EBITDA margin every quarter.
The board could not explain it. Revenue was tracking the deal model. Gross margin was holding. Yet operating leverage, the thing the investment thesis depended on, had disappeared. The CFO produced variance bridge after variance bridge, each explaining a piece of the decline and missing the whole.
The whole was that the company had added $14M in revenue and roughly $17M in annual contractual commitments to support it. Nobody owned that second number because nobody was asked to produce it. Accounting tracked expenses. Sales tracked bookings. Finance tracked EBITDA. The fixed-commitment base lived between cost centers and belonged to no one.
This is the year the pattern becomes visible at the portfolio level. The 2025-vintage funds approaching exit are running into a bid-ask gap that has widened since Q1 2026, concentrated on mid-market software. Buyers have learned to back the commitment base out of EBITDA in their own diligence. Most sellers do not know the adjustment is being made until the marks come back.
Across ten years of operating roles, I have seen this exact shape at every PE-backed company that hits a margin wall mid-hold. Revenue moves like software. Costs settle like concrete. Growth creates obligations faster than it creates cash, and the obligations stay even when the growth stops.
An expense is something you can reduce. A commitment is something that continues regardless of revenue.
How the math actually compounds
The mechanics are predictable. The company closes a $500K enterprise deal. Implementation requires two engineers, a CSM, and a project manager. Fully-loaded compensation for the four hires runs $450K annually. SOC 2 compliance to meet the buyer’s vendor requirements adds $80K in audit fees and $40K in tooling. On the deal memo, the contract looks accretive. On the cash flow, the company added $570K in annual obligations to capture $500K in revenue, with most of those obligations locked in for twelve months whether the customer renews or not.
A single deal at 1.14x obligation-to-revenue is unremarkable. The compounding is where the wall builds. Run twenty enterprise deals over eighteen months with overlapping implementation timelines, year-one tooling escalators, and the second-order hires that come from managing the first hires, and the cumulative commitment base tends to expand at something like 1.3 to 1.5x the revenue growth rate. The CFO sees cost growth in engineering. The COO sees it in customer success. The CRO sees implementation timelines extending. No one person sees the total, because the total was never anyone’s job.
The four layers of the stack
The drag accretes in layers that each feel sensible.
Software. A typical mid-market PE-backed company runs forty to sixty SaaS subscriptions, $10K to $200K each, most carrying 5 to 10 percent annual escalators on twelve to thirty-six month auto-renewals. Vendors price around the friction of cancellation, and their renewal teams know when a customer’s procurement function is too busy to negotiate. Software alone can absorb 8 to 12 percent of revenue at scale, with about half of it unreducible inside a twelve-month window.
Headcount. Hiring is fast, firing is slow and culturally corrosive, so growth-stage companies over-hire and carry twelve to eighteen months of excess staffing before a correction. Severance, retention bonuses for the remaining team, and the productivity cost of a downsizing push the true cost of the over-hire well above the salary line.
Real estate. A five-year lease at peak becomes a five-year anchor when growth flattens. Square-footage decisions made on assumptions about headcount that does not materialize are the obligations that survive every other restructuring. Sublease markets in growth corridors are illiquid for a reason.
Vendor lock-in. Implementation contractors, audit firms, channel partners, and infrastructure providers all carry minimum commitments that look small individually and aggregate to 4 to 6 percent of revenue. Sensible at signing, indefensible eighteen months later when growth has rotated to a different motion.
Three habits that prevent the discovery in a board meeting
The companies that stay ahead of the curve practice three habits. The companies that discover the curve in a board meeting do not.
Track total contractual commitments on a rolling twelve-month basis. Your CFO should be able to tell you, at any point, the dollar amount the company is obligated to spend over the next twelve months regardless of revenue. If that number takes more than an hour to produce, you do not have financial visibility. You have bookkeeping.
Build breakability into every new commitment. A 15 percent premium on a one-year SaaS contract versus a three-year lock-in costs you 15 percent today. At an 8 percent cost of capital, the optionality value of being able to leave at month twelve is worth roughly 22 percent of contract value. The premium is cheap insurance. The same logic applies to leases, vendor agreements, and staffing models.
Stress-test against a revenue decline. If revenue drops 20 percent for two consecutive quarters, which obligations can you exit, and how fast? If the answer is almost none and it would take six months, the commitment base is not supporting growth. It is constraining survival.
The objection that deserves a fair hearing
The strongest counter-argument is real. Growth-stage companies must commit ahead of revenue. A SaaS company that refuses to lock in three-year leases, hire ahead of pipeline, and over-buy software on the front end is a company that will be displaced by a competitor willing to absorb the obligation. Discipline becomes paralysis. Capital efficiency becomes capital irrelevance.
The objection is partly right and overapplied. There is a region of the J-curve where committing ahead of revenue is the correct call. That region exists. It is also narrower than most operators believe. It applies to true category-defining moments where the cost of being late is the existence of the company. Most of the obligations on a mid-cycle PE balance sheet are not from those moments. They are from the cumulative drift of decisions that each looked like growth investment and were actually deferred margin.
The discipline that separates durable scaling from drift is asymmetric. You absorb commitment aggressively when the deal requires it. You insist on breakability everywhere else. The companies that compound through cycle treat the second category as the default and require an explicit, written case for moving anything into the first.
The predictive claim
By Q4 2026, dispersion in operating-multiple expansion across mid-market software portfolios will sort by obligation-to-revenue ratio, not by ARR growth rate. The companies that compound through this cycle are the ones whose CFOs can produce the rolling twelve-month commitment number in under an hour, and whose margin programs target the commitment base before they target headcount. The companies that disappoint at exit are the ones whose ratio crossed 1.3x somewhere in years two and three of the hold and never came back, regardless of how cleanly revenue grew on the surface.
This is testable. By mid-2027, the bid-ask gap on PE software assets in the secondary market will widen on companies whose disclosed three-year contract minimums exceed thirty percent of trailing-twelve-month revenue, and narrow on companies whose comparable ratio is below twenty percent. The asymmetry is already visible in the diligence documents passing between LP-backed buyers in Q2 2026. It will be visible in marks by year-end.
The closing
The companies that scale durably are not the ones that spend the least. They are the ones that maintain the highest ratio of flexible spending to committed spending, and whose CFOs treat the embedded commitments as a single managed number rather than the residual of dozens of departmental decisions.
Ask your CFO for total contractual commitments on a rolling twelve-month basis. The hidden cost is not the dollar amount. The hidden cost is that the absence of the number means nobody is managing the variable that determined the J-curve eighteen months ago and will determine the exit eighteen months from now.
The $14M of revenue arrived as growth. The $17M of obligations arrived as growth. Only one of those two numbers had a name on it.
Related reading: Most Businesses Don’t Know Where They’re Fragile and Fragility.
If this framework resonates, two tools sit alongside it.
The Structural Audit produces the rolling twelve-month commitment number in eight minutes and maps the four layers against your company’s specific revenue base.
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Has your company ever grown revenue and lost margin at the same time? Hit reply or leave a comment. I read every one.