IBM (IBM) Q2 2025 earnings review
Software and Mainframe Drive Beat and Raise; Consulting Remains a Drag
IBM delivered a strong second quarter, beating expectations with revenue growth accelerating to 5% at constant currency, driven by robust Software performance (+8%) and a powerful kickoff to the new z17 mainframe cycle (+67% in IBM Z). The impressive results and strong margin expansion prompted management to raise its full-year free cash flow guidance to over $13.5 billion. However, the performance was lopsided, as the Consulting segment remained stagnant with flat year-over-year growth for the second consecutive quarter, reflecting ongoing client caution in discretionary spending.
🐂 Bull Case
The new z17 mainframe cycle is off to its strongest start in company history, driving a sharp reversal in the Infrastructure segment. This provides a significant, high-margin tailwind for revenue and profit for the next several quarters.
Management's confidence is backed by a raised full-year free cash flow guide to over $13.5 billion, supported by significant margin expansion and a target of $4.5 billion in annual run-rate productivity savings.
The generative AI book of business grew to over $7.5 billion, up from $6 billion last quarter, indicating accelerating client demand and establishing IBM as a key partner in enterprise AI adoption.
🐻 Bear Case
Consulting revenue was flat for the second quarter in a row, a clear sign of weakness in discretionary enterprise spending. This segment remains a significant drag on overall growth with limited visibility on a recovery.
The strong quarterly results are heavily dependent on the cyclical mainframe launch. While powerful, it masks the underlying weakness in Consulting and raises questions about growth sustainability once the hardware cycle peaks.
⚖️ Verdict: 🟢
Bullish. The beat and raise are compelling, driven by the company's highest-margin, most defensible businesses: Software and the Mainframe. The significant margin expansion and higher free cash flow guidance demonstrate strong operational execution. While the stagnation in Consulting is a valid concern, the powerful momentum in the core growth engines more than offsets it for now.
Key Themes
z17 Mainframe Cycle Kicks Off With a Bang
The new z17 mainframe cycle drove a dramatic reversal in the Infrastructure segment, with revenue flipping from a 4% decline last quarter to 11% growth. The core IBM Z hardware revenue surged 67% YoY (CC). Management noted this is the strongest-ever start to a new mainframe program, fueled by client demand for AI workloads, security, and scalability. This cycle is expected to be a major growth contributor for the full year, with the company guiding for the segment to add 1.5 points to total IBM revenue growth.
Software Momentum Continues, Led by Red Hat
The Software segment delivered another robust quarter with 8% constant currency growth. Performance was broad-based, with Red Hat accelerating one point sequentially to 14% growth and Automation growing 14%. The company's Annual Recurring Revenue (ARR) base grew 10% to $22.7 billion, providing a durable foundation for future growth. The performance underpins the full-year guidance for software revenue to grow 'approaching double digits'.
Productivity Initiatives Fuel Margin Expansion
IBM's focus on internal efficiency is paying off, driving significant operating leverage. Operating gross profit margin expanded by 230 basis points and operating pre-tax margin grew by 110 basis points. Management is accelerating these efforts, raising the target for annual run-rate savings from $3.5 billion to $4.5 billion by the end of 2025. This discipline is funding investments, protecting profitability, and was a key factor in the raised free cash flow guidance.
Consulting Remains Stuck in Neutral
Contradicting the strength elsewhere, the Consulting segment reported 0% constant currency revenue growth for the second consecutive quarter. Management acknowledged that clients are continuing to delay discretionary projects due to the dynamic macro environment. While the backlog grew 4%, the lack of in-period revenue conversion remains the most significant weak spot in IBM's portfolio and a drag on overall growth.
Transaction Processing Lags Hardware Boom
A key data point to monitor is the 2% decline in high-margin Transaction Processing software revenue. Management explained that clients prioritized spending on the new z17 hardware in the quarter. While this is a typical pattern at the start of a cycle, a slow recovery in this software category could mute the overall profitability benefit from the mainframe refresh.
Dynamic Macro Environment Constrains Spending
CEO Arvind Krishna noted that while the overall tech spending environment is solid, 'geopolitical tensions are prompting a few clients to move cautiously.' This uncertainty is the primary driver of the weakness in the Consulting business, where projects perceived as discretionary are being postponed. U.S. federal spending was also cited as 'somewhat constrained' in the first half.
Other KPIs
Up from the previous guidance of 'about $13.5 billion.' The increase reflects strong first-half performance, where FCF reached $4.8 billion (up $300 million YoY), driven by over $1 billion in adjusted EBITDA growth. This signals high confidence in second-half profitability and working capital management.
Stable. Despite flat revenue, the backlog remains healthy, with a trailing 12-month book-to-bill of 1.14. However, management noted that in-period signings were impacted by delayed decision-making on discretionary projects. The quality of the backlog is shifting towards longer-duration AI transformation projects.
Accelerating. Red Hat's growth accelerated by one point from Q1, fueled by continued double-digit bookings. OpenShift revenue grew over 20% with an ARR of $1.7 billion. The opportunity around virtualization, following market disruption, continues to be a significant tailwind with a strong pipeline.
Guidance
Stable. The company maintained its full-year revenue guidance. Hitting this target implies an average growth rate of at least 5% in the second half, representing a sustained acceleration from the ~3.5% average growth in the first half of the year.
Accelerating. The guidance was raised from 'about $13.5 billion.' This reflects stronger-than-expected profitability and margin expansion, driven by portfolio mix and productivity initiatives.
Accelerating. The outlook for Software implies an acceleration in H2. The Infrastructure guide confirms a significant full-year reversal from being a drag in FY24 to a major growth contributor in FY25, driven entirely by the new z17 cycle.
Decelerating. This language represents a step back from the 'low-single-digit' growth guided for at the beginning of the year. It confirms that management sees continued weakness and has low visibility for a recovery in discretionary spending in 2025.
Key Questions
Consulting Path to Recovery
Given that Consulting has been flat for two quarters and the outlook is now just 'cautious,' what specific green shoots or leading indicators are you looking for that would signal a return to growth in this segment?
Transaction Processing Lag
Transaction Processing software declined 2% despite a 67% surge in mainframe hardware. What is the typical lag before hardware capacity translates to software revenue growth, and what is the bridge to get this segment back to the guided 'low single-digit' growth for the full year?
AI Incrementality in Software
The GenAI book of business in software is now $1.5 billion. How much of this is truly net-new spending versus existing customers upgrading or shifting budgets from other parts of the IBM software portfolio?