Ero Copper (ERO) Q1 2026 earnings review
Massive YoY Revenue Growth Masks Severe Q1 Cost Spikes
Ero Copper's Q1 2026 results show a company fundamentally transformed by the Tucumã operation, which drove a 110% YoY revenue surge to $263.2 million. However, the top-line growth hides severe operational hiccups at the legacy assets. The trend in sequential revenue is Reversing, down 18% from Q4 2025's peak. More alarmingly, Xavantina's gold AISC exploded to $4,441/oz due to a ventilation project, flipping the segment's margin negative despite record gold prices. Caraíba also suffered, with C1 costs hitting $2.79/lb on lower grades. Management is banking heavily on a back-half recovery to hit maintained full-year guidance. On the bright side, free cash flow remains robust enough to continue aggressive deleveraging, reducing total debt by over $25 million in the quarter.
🐂 Bull Case
The Tucumã mill is running smoothly. Ore processed reached 563,717 tonnes, up 9% sequentially. It is now consistently producing roughly as much copper as the legacy Caraíba operations.
The company successfully paid down $10M on its Senior Credit Facility and reduced total loans and borrowings by over $25M in the quarter. Net debt fell to $490.7M, improving balance sheet flexibility.
🐻 Bear Case
A ventilation and cooling infrastructure tie-in crushed Xavantina's throughput. Gold AISC skyrocketed to $4,441/oz, completely erasing margins even with realized gold prices at an impressive $4,195/oz.
Stope sequencing at the Pilar Mine drove mined grades down to 0.93%, pushing Caraíba's C1 cash costs to $2.79/lb. Management needs a massive H2 turnaround to hit the $2.30-$2.50 guidance range.
⚖️ Verdict: ⚪
Neutral. The long-term thesis (Tucumã volume growth + Furnas PEA) remains intact, but the operational execution in Q1 was undeniably poor. The extreme cost spikes at Xavantina and Caraíba leave management with zero room for error for the rest of 2026.
Key Themes
Xavantina Cost Shock and Margin Collapse
The trend in unit costs is Accelerating sharply in the wrong direction. Xavantina's AISC surged to $4,441/oz (up from $1,702/oz in Q4 2025). Management attributes this entirely to the installation and tie-in of a ventilation/cooling system and additional ground support, which throttled mining rates. Because of this, the average realized gold price of $4,195/oz wasn't enough to prevent a negative operating margin on those ounces. With tie-ins substantially complete by end of April, H2 must be nearly flawless to hit the $2,000-$2,500/oz annual guidance.
Tucumã Becomes the Co-Anchor
Tucumã's ramp-up is now Stable. It processed 563,717 tonnes of ore in Q1, a 9% sequential increase. Despite a planned drop in head grade (to 1.66% from 1.93% in Q4), C1 costs remained highly competitive at $1.97/lb. The company also ordered modular tailings filters to augment the circuit in H2 2026, which represents unguided upside to throughput later this year.
Caraíba Grade Deterioration
Caraíba's C1 costs are Accelerating, hitting $2.79/lb compared to $2.27/lb in Q4 2025. This was driven primarily by stope sequencing at the Pilar Mine, which dropped processed copper grades from 1.18% a year ago to 0.93% in Q1 2026. Management warned that costs will remain above the annual guidance range ($2.30-$2.50) in H1 before sequential improvements in H2.
Furnas PEA Validates Long-Term Pipeline
The company published the inaugural PEA for the Furnas Copper-Gold Project in March 2026. At long-term prices of $4.60/lb Cu and $3,300/oz Au, the project boasts an after-tax NPV (8%) of $2.0B and a 27% IRR. To de-risk this, Ero completed over 12,000 meters of a planned 50,000-meter 2026 drill program during Q1 to upgrade inferred resources.
Other KPIs
Reversing from Q4's $129.1M peak but representing a massive 42% YoY improvement compared to Q1 2025's $65.4M. This liquidity enabled $21.4M in principal repayments on loans and borrowings.
Net income ($109.3M) was heavily inflated by non-operating FX gains. The Brazilian Real strengthened ~5% against the USD during the quarter, generating $34.6M in unrealized gains on USD-denominated debt at MCSA and a $16.5M gain on derivative contracts. Adjusted net income removes this noise, coming in at a more realistic $72.4M.
Guidance
Stable. The company maintained full-year guidance. With 17,287 tonnes produced in Q1, the run-rate implies production must Accelerate slightly in the back half of the year to comfortably hit the 72,500-tonne midpoint. Caraíba is expected to drive this with higher processed grades in H2.
Stable. Management maintained guidance but explicitly noted costs will run hot (above range) in H1 2026 before Decelerating sequentially in H2 as Caraíba grades improve.
Stable guidance, but requires Reversing the current Q1 trajectory. Q1 delivered only 5,495 ounces. To hit the 45,000 midpoint, Xavantina must average over 13,000 ounces per quarter for the rest of the year—a steep ramp-up dependent entirely on the success of the new ventilation system.
Key Questions
Xavantina's Steep Mountain to Climb
With Q1 AISC at $4,441/oz and production below 5,500 ounces, hitting the $2,000-$2,500/oz cost guidance requires a dramatic operational pivot. What are the specific, month-by-month operational milestones in Q2 and Q3 that will assure investors this turnaround is on track?
Caraíba Grade Profile
Mined grades at Caraíba dropped to 0.93% in Q1. While H2 is expected to see higher grades, is the current Q1 grade floor a structural feature of the stope sequencing that we should expect to repeat in future H1 periods?
Furnas Next Steps
With the PEA published, what are the primary gating items and capital requirements for advancing Furnas to the Pre-Feasibility (PFS) or Feasibility stage over the next 12 to 18 months?