AutoZone (AZO) Q3 2026 earnings review
Earnings Return to Growth as Expense Leverage Offsets Margin Drag
AutoZone broke a two-quarter streak of GAAP EPS declines, delivering 7.7% EPS growth alongside a robust 8.4% revenue increase. After absorbing heavy non-cash LIFO charges and SG&A investments in the first half of the year, management proved they could pull the expense lever, driving operating margins back above 19%. Domestic Commercial sales re-accelerated to 10.4% YoY, brushing off Q2's weather impacts. The glaring weak spot is International: constant currency same-store sales decelerated severely to 1.6%, a stark contrast to the 16.6% reported figure artificially inflated by FX.
🐂 Bull Case
SG&A expenses improved to 33.1% of sales from 33.3% a year ago. After quarters of 'investment phase' deleveraging, AutoZone is proving its revenue growth can scale profitably.
Domestic Commercial sales grew 10.4% to $1.4B. The strategic MegaHub investments and improved delivery speed continue to successfully capture market share from local and regional garages.
🐻 Bear Case
International constant currency same-store sales collapsed to just 1.6% growth, down from 8.1% a year ago. Management cited underperformance in both Mexico and Brazil.
Gross margin declined another 57 basis points to 52.2%. A 77-basis point non-cash LIFO charge continues to mask underlying merchandise margin gains and compress reported profitability.
⚖️ Verdict: 🟢
Bullish. AutoZone is executing perfectly on its core domestic strategy. The return of operating leverage and strong commercial growth comfortably outweigh the international slowdown and temporary accounting (LIFO) noise.
Key Themes
Domestic Commercial is the Growth Engine
Accelerating/Stable. Domestic commercial sales increased 10.4% YoY, bouncing back from 9.8% in Q2 and signaling that Q2's weather-related deceleration was a blip. Average sales per program per week increased 4.5% to $18,500. This structural shift is supported by continued Hub and Mega Hub expansions carrying over 100,000 SKUs.
International Performance is Decelerating Rapidly
Decelerating. A major red flag hidden by currency translation: while reported international same-store sales grew an eye-popping 16.6%, constant currency SSS grew a meager 1.6%. This is a massive drop from the 8.1% constant currency growth seen in Q3 FY25. Management explicitly admitted that Mexico and Brazil performance was 'below our plan', driven by a soft macro environment in Latin America.
SG&A Leverage is Back
Reversing. For the past three quarters, management defended SG&A deleveraging as an 'intentional investment phase' for store and supply chain expansion. In Q3, AutoZone achieved leverage: operating expenses fell to 33.1% of sales versus 33.3% a year ago. Strong top-line sales growth finally outpaced the expense drag, pushing operating profit up 6.6%.
LIFO Accounting Conceals Merchandise Margin Strength
Stable (Negative). Gross margin printed at 52.2%, a decrease of 57 basis points YoY. However, 77 basis points of this drop were purely driven by non-cash LIFO impacts tied to inflation/tariffs. Excluding LIFO, gross margin actually expanded by 20 bps, showcasing strong core pricing power and private label (Duralast) penetration that is offsetting the mix-shift drag of the lower-margin commercial business.
Aggressive Footprint Expansion Continues
Stable. The company opened 82 net new stores globally in Q3 (57 US, 20 Mexico, 5 Brazil). Total store count reached 7,856. The strategy is straightforward: increased proximity to garages combined with the specialized ALLDATA diagnostic software ecosystem keeps AutoZone at the top of the call list for professional mechanics.
Inventory Growth Outpacing Sales
Inventory increased 10.8% YoY to $7.56B, outpacing the 8.4% total sales growth. While management attributes this to 'growth initiatives and inflation,' an elevated inventory-to-sales ratio risks future markdowns or ties up working capital if the macro environment—particularly in international markets—continues to soften.
Other KPIs
Accelerating/Improving from Q1 and Q2. Management specifically highlighted the return to an operating margin 'north of 19%'. This was achieved entirely through tight SG&A control, which offset the 57 bps gross margin contraction.
AutoZone aggressively bought back 164,000 shares at an average price of $3,582. This brings total remaining authorization down to $0.8 billion. The relentless buyback machine mechanically boosted the 5.4% Net Income growth into a 7.7% EPS growth.
Net inventory (inventories less accounts payable) remains negative on a per-store basis (-$107K vs -$142K last year). This means vendors continue to finance AutoZone's inventory, a hallmark of their highly efficient capital structure, though the buffer shrank slightly YoY as AP-to-inventory ratio dropped from 115.6% to 111.1%.
Guidance
Stable. The company reiterated its expectation for the full fiscal year. Given the 199 stores opened year-to-date, this implies a massive acceleration in Q4, requiring approximately 156-166 store openings in the final quarter to hit the target. This back-end weighting could pressure Q4 SG&A.
Key Questions
International Macro Disconnect
Constant currency SSS in international markets decelerated sharply to 1.6%. How much of this is driven by structural macro weakness in Mexico/Brazil versus specific execution or competitive issues?
LIFO Turnaround Timeline
With another 77 basis points of LIFO headwind this quarter, when does management expect same-SKU inflation to peak and allow these non-cash charges to reverse into tailwinds?
Q4 Margin Outlook
You achieved SG&A leverage in Q3. However, with guidance implying over 150 store openings in Q4 to hit your annual target, should investors expect a return to SG&A deleveraging next quarter?
DIY Health
Domestic SSS grew 4.1%, but Commercial clearly drove the bulk of that with 10.4% growth. Can you provide the specific traffic versus ticket breakdown for the DIY segment this quarter to gauge the health of the low-end consumer?