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Quantum Forecast Revisions: How Analysts Changed Their Numbers

Updated | 4 min read | QUANTUM (QNT) community

Forecasts are not carved in stone

One of the best ways to stay sane about market numbers is to watch how they change. Analysts publish a figure, reality shifts, and the next edition quietly moves. That is normal, and a healthy sign that firms update when they learn something. It is also a reminder that today's number is a snapshot. This guide walks through the revisions I could verify. It is not financial advice.

IDC: down from 8.6 to 7.6 billion for 2027

In a December 2021 release (via Help Net Security), IDC forecast worldwide quantum computing customer spending growing from 412 million dollars in 2020 to 8.6 billion in 2027, a 50.9 percent yearly growth rate over 2021 to 2027. In August 2023 (via TelecomTV), IDC published a new forecast: 1.1 billion dollars in 2022 growing to 7.6 billion in 2027, a 48.1 percent rate. IDC said this was considerably lower than its earlier forecast. The reasons it gave, as reported: quantum hardware progress was slower than expected, which delays the payoff for buyers; generative AI is expected to deliver more near term value to end users; and economic pressures such as higher interest rates and inflation.

Look at what happened in that story. Within two years, an analyst firm took about a billion dollars off its estimate for the same target year, and named competition from AI as one reason. That is a clean example of why a forecast depends on assumptions outside the quantum lab.

BCG: long term kept, near term tempered

A July 2024 BCG update, as summarized by a law firm, reports quantum computing could create 450 billion to 850 billion dollars of economic value by 2040 and a market for hardware and software providers of 90 billion to 170 billion dollars. The same summary notes that the goalposts for judging quantum performance are shifting, because classical hardware and AI software keep improving, so the bar for beating them keeps rising. I could not open BCG's own page or the full report, so I cannot detail exactly what changed from BCG's earlier edition. Read the primary report for that.

McKinsey: up in 2026

Revisions go up as well as down. A critical review of McKinsey's April 2026 Monitor reports that its quantum technology market estimate for 2035 of 60 to 100 billion dollars was revised upward from last year's 28 billion dollar figure. The review also notes the 2026 edition covers a year of heavy funding: 12.6 billion dollars of investment in 2025 and, reportedly, a 97 percent private share. A careful reader should notice that the 2025 McKinsey edition, as summarized elsewhere, gave a total of up to 97 billion dollars across all three pillars by 2035. The different quoted numbers (28 billion, 97 billion, 60 to 100 billion) are not directly comparable, since they may refer to different scopes or lower ends of ranges. That is precisely the trap described in the checklist guide. If you cite a revision, cite which line of which table moved.

Gartner: a smaller, nearer number

A Gartner abstract dated September 11, 2026 is reported to project the quantum computing market at 2.3 billion dollars by 2030. I only saw a search summary of that abstract, so treat it cautiously. It is useful here only as a contrast: nearer horizons and narrower definitions give far smaller numbers than the trillion dollar value headlines.

Patterns worth noticing

What to do with this

Treat any forecast as dated. When you see one, find its publication date, check whether a newer edition exists, and compare it with what real companies report in their filings. Past misses do not make future numbers wrong, and past hits would not make them right. For broader context see the quantum timeline and why quantum valuations swing on news.

Sources and further reading

Reported as of 2026-10-09. Analyst reports are revised often and full versions are sometimes behind paywalls, so check the primary documents before relying on any figure. Nothing here is financial advice. The QNT memecoin is independent of Quantinuum Ltd, the real company, and of every analyst firm and company named on this page.

Frequently asked questions

Have quantum market forecasts been revised?

Yes. IDC reportedly cut its 2027 spending forecast from 8.6 billion dollars (December 2021) to 7.6 billion (August 2023), and a reviewer reports McKinsey raised its 2035 market estimate in 2026 from a previous 28 billion dollar figure.

Why did IDC lower its quantum forecast?

As reported, because quantum hardware progressed more slowly than expected, generative AI promised more near term value, and economic conditions tightened.

Does a forecast revision tell me where quantum is heading?

It tells you what the analyst learned that year. It is not a prediction of the next revision or of any asset price.

Is the QNT memecoin affected by analyst forecasts?

Forecasts describe an industry. QNT is an independent memecoin with no link to Quantinuum Ltd. This is not financial advice.

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