Why construction still runs on spreadsheets (and what it costs)

Construction has historically spent less than 1% of revenue on IT. The spreadsheet is not a habit, it is a symptom. Here is what that actually costs a contractor.

Ask a contractor how they track unit sales, installment payments, or change orders, and the answer is usually a filename. Not a system: a file, on someone's laptop, with a name ending in "v4_FINAL". This is not a character flaw of the industry. It is the predictable result of decades of underinvestment.

The least digitized major industry

McKinsey's research on construction productivity puts a number on it: construction companies have historically spent less than 1% of revenue on IT, less than a third of what is common in automotive or aerospace. The same research notes the tide turning: between 2020 and 2022, venture and private equity funds invested $50 billion in architecture, engineering and construction technology, 85% more than in the previous three years.

What the spreadsheet actually costs

• Version roulette: when the source of truth is emailed around, every copy is a fork. Two people, two different availability counts.
• Silent errors: a dragged formula, a mistyped installment. Spreadsheets fail quietly, and the error compounds for months before anyone notices.
• No alerts: the file knows a payment is overdue. It just cannot tell you. You have to remember to look.
• Key-person risk: when the person who built the file is away, the operation pauses.

The useful question

The choice is not "spreadsheet versus software". It is "how many things must someone remember to check?". If the answer includes installments, unit status, promises to buyers and progress certificates, the spreadsheet is no longer tracking your operation. It is hiding it.