CoStar Group (CSGP) Q2 2026 earnings review
A Major Profitability Inflection Reverses the Burn Narrative
CoStar achieved a milestone in Q2 2026: the Residential segment finally turned Adjusted EBITDA positive ($12M), reversing a long streak of heavy losses. This massive inflection drove total Adjusted EBITDA up 116% YoY to $184M. Revenue grew 18% YoY to $925M, reflecting strong operating leverage as the company held expense growth to just 2%. Management successfully executed its pivot from aggressive cash-burn market capture to margin expansion, reducing projected expenses by $100M. However, the top-line leading indicator—net new bookings—remains notably depressed year-over-year, suggesting the rookie sales force is still struggling to deliver expected productivity.
🐂 Bull Case
The Residential segment generated $12M in Adjusted EBITDA, a $41M sequential improvement and a dramatic reversal from the $76M loss a year ago. Revenue grew 18% while operating costs grew only 2%.
The rollout of Apartments.com Ai generated over 500,000 sessions in weeks, yielding 2.8x longer session times and a massive 256% lift in traffic-to-lead conversions, securing CoStar's premium pricing power.
🐻 Bear Case
Despite a massive expansion of the sales force in 2025, Q2 2026 net new bookings of $69M represent a 26% year-over-year decline from the $93M recorded in Q2 2025.
The core Commercial Real Estate segment grew just 7.8% YoY ($481M vs $446M in 25Q2), suggesting the legacy cash cow is facing macroeconomic headwinds and market saturation.
⚖️ Verdict: 🟢
Bullish. The successful shift of the Residential segment into profitable territory eliminates the largest structural overhang on the stock. While bookings need to re-accelerate to justify long-term targets, the immediate execution on margin expansion is stellar.
Key Themes
Residential Segment Reversing from Cash Burn to Cash Cow
The highly debated, multi-hundred-million-dollar investment in Homes.com is finally showing bottom-line results. Residential Adjusted EBITDA inflected to positive $12 million from negative $29 million in Q1 and negative $76 million a year ago. This confirms management's guidance from Q1 that Residential would turn profitable by Q2, significantly de-risking the broader corporate strategy.
Ruthless Expense Discipline Driving Outperformance
Management successfully held operating expense growth to a mere 2% year-over-year, while top-line revenue grew 18%. This allowed overall Adjusted EBITDA to soar 116%. The company has cut its projected expense base by roughly $100 million compared to initial guidance, establishing a clear glide path to hit their 2028 and 2030 long-term margin targets.
Apartments.com Ai Revolutionizing Lead Conversion
Following the success of Homes.com Ai, the June launch of Apartments.com Ai is generating extraordinary engagement. Within weeks, users completed over 500,000 AI sessions. Crucially, these sessions average 20 minutes (2.8 times longer than non-AI users) and have driven traffic-to-lead conversions up by 256%. This proprietary technology stack acts as a massive competitive differentiator against fragmented competitors.
Net New Bookings Refuse to Re-accelerate
Net new bookings in Q2 2026 clocked in at $69 million. While technically up 3% sequentially from Q1 ($67M), this is a harsh deceleration compared to the record $93 million delivered in Q2 2025. This directly contradicts the bullish narrative surrounding the massive 2025 sales force ramp; if rep productivity was normalizing, bookings should easily outpace the prior year's footprint.
Core Commercial Growth is Decelerating Due to Macro Headwinds
CoStar's legacy engine is losing steam. The Commercial Real Estate segment recorded $481M in revenue, up only 7.8% YoY compared to 25Q2 ($446M). As the broader commercial real estate sector continues to grapple with elevated interest rates, volatile valuations, and a sluggish transaction environment, CoStar is increasingly reliant on the unproven Residential side to maintain its double-digit consolidated growth rate.
Revenue Guidance Implies Growth Deceleration
Despite a strong Q2 featuring 18% revenue growth, management's Q3 revenue guidance of $935-$945M implies growth decelerating to approximately 13% YoY. This step-down suggests that the pricing power gains and market share grabs witnessed over the last 12 months may be encountering stronger resistance or natural limits in the addressable market.
Other KPIs
Accelerating significantly. Adjusted Net Income jumped 73% year-over-year from $74 million in 25Q2. The corresponding Adjusted EPS of $0.32 outpaced revenue growth, highlighting excellent flow-through from cost controls.
Reversing standard tech trends, CoStar generated immense GAAP profitability, rocketing 817% year-over-year from a mere $6 million in Q2 2025. Margins are expanding rapidly as the massive acquisition and integration costs from previous periods start to fall off.
Guidance
Accelerating. The company raised the midpoint of its full-year guidance by $30 million. This reflects soaring confidence in ongoing cost containment and the newfound profitability of the Residential segment. The midpoint implies a robust 21% margin.
Stable. The revised guidance implies approximately 15% YoY growth at the midpoint. While healthy, it relies heavily on the Residential segment to offset single-digit growth in the core Commercial businesses.
Decelerating. Represents ~13% YoY growth at the midpoint, marking a notable step-down from the 18% YoY growth realized in Q2 2026. This sequential flattening points to potential near-term saturation or cyclical sales delays.
Accelerating sequentially. At the midpoint ($200M), this implies an expanding 21% margin profile, up from the $184M (19.8% margin) delivered in Q2. Management is demonstrating precise control over operating leverage.
Key Questions
The Bookings Disconnect
Net new bookings are down 26% year-over-year despite the massive increase in sales headcount over the last 18 months. Are we seeing fundamentally lower structural productivity from the new cohorts, or is this a top-of-funnel macro issue?
Commercial Segment Durability
With the Commercial Real Estate segment growing in the single digits, what are the specific macro drivers dampening adoption, and does the 2026 guidance assume a re-acceleration or further slowing in this core vertical?
AI Monetization Path
Apartments.com Ai is driving a 256% increase in conversions. How quickly will these enhanced performance metrics be translated into higher ARPU or new premium subscription tiers for property managers?
Residential Margin Sustainability
Residential EBITDA swung positive to $12M this quarter. Is this the new floor, or are there seasonal marketing investments planned for H2 2026 that could pull this segment back into the red?