When 90 Percent of Capital Projects Blow the Budget: The Post-Investment Audit Most CFOs Skip

Here is a governance gap that costs companies billions and almost no one talks about. Roughly 90 percent of major capital projects run over budget, by an average of about 28 percent, and most companies never go back to check whether the business case that justified the spend actually came true. The approval meeting gets intense scrutiny. The outcome gets none. That asymmetry is exactly how the same optimistic assumptions repeat, project after project, with no feedback loop to correct them.

How do CFOs measure whether a capital project actually delivered its promised ROI?

Most do not, and that is the problem. Capital is approved on a forecast and then orphaned. Once the money is spent, attention moves to the next request, and no one reconciles the realized return against the business case that justified the investment. A post-investment audit closes that loop. It compares actual ROI, cost, and timeline against the original promise, names the variance, and feeds the lesson back into the next decision. It is the cheapest governance a CFO can install, and one of the highest return.

The scale of the overrun problem

The numbers get worse as projects get bigger. Reviews of more than 300 billion-dollar-plus megaprojects found average cost overruns of around 80 percent and schedule delays of about 50 percent. At the industrial level, roughly 65 percent of capital projects fail to meet their cost, schedule, and business objectives. Most of these failures trace not to bad luck but to the planning fallacy: a systematic bias toward optimistic estimates that no one is held accountable for after the fact.

Why the feedback loop is the fix

The planning fallacy persists because there is no consequence for it. When estimates are never checked against outcomes, optimistic assumptions carry no cost and simply recur. Install a disciplined post-investment audit and the dynamic changes. Teams that know their estimates will be reconciled against reality estimate more honestly. The organization builds a memory of what actually works versus what was merely promised, and capital decisions improve cycle after cycle because the institution is finally learning.

Making the loop automatic with Lunation

The reason most companies skip the post-investment audit is that it is tedious to do by hand, so it falls off the list. Lunation removes that friction. As the operating system for transformation and innovation capital, Lunation structures every initiative from business case to realized ROI, so the comparison happens automatically and the learning compounds with each capital cycle. Integrated with ERP and FP&A, it becomes the system of record that governs capital spend the way ERP governs operations. You can see more at www.lunation.com.

Govern capital like the asset it is

A capital budget is one of the largest discretionary uses of cash a company controls, and it deserves the same rigor as any other asset. The post-investment audit is the discipline that turns a budget into a learning system. The companies that install it stop repeating expensive mistakes, and they can defend every capital decision to their board, their investors, and their lenders with evidence rather than assertion.

Key takeaways

• About 90 percent of major capital projects overrun budget, by an average of roughly 28 percent.

• Billion-dollar megaprojects average about 80 percent cost overrun and 50 percent schedule delay.

• A post-investment audit reconciles realized ROI against the original business case.

• The feedback loop cures the planning fallacy by making estimates accountable.

• Lunation makes the business-case-to-ROI loop automatic and compounding at www.lunation.com.

Close the loop on your capital

Lunation gives CFOs the system of record that governs capital from business case to realized ROI, so every cycle teaches the next. If 90 percent of projects miss and no one checks, the cheapest improvement available is the audit you are not doing. Book a capital review at www.lunation.com.

About Quadrillion Partners

Quadrillion Partners is an operator-led performance improvement firm. We deploy former CxO operators to deliver measurable EBITDA, cash, and enterprise value in 90 days, not 18 months. More than $1.2 billion in enterprise value delivered since 2012.

Plan. Operating, strategic, and value creation plans built by operators who have owned the AOP. In market in 60 to 90 days, ready for the board, sponsors, and lenders.

Execute. 90 to 180 day sprints against the single constraint limiting performance: digital and AI, go-to-market, throughput, or working capital. Success fees aligned to the EBITDA we deliver.

Embed. Interim CFO, CTO, Chief Transformation Officer, and FP&A leadership through the inflection: pre-sale prep, post-close integration, or a leadership gap. We hire your permanent successor before we step out.

Contact George Stelling, Managing Partner and CEO

Email: gstelling@quadrillionpartners.com   |   Phone: +1 650 678 1887

Web: www.quadrillionpartners.com

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