Fitch Ratings has affirmed Ero Copper Corp.'s (Ero) Long-Term Issuer Default Rating (IDR) at 'B'.

In addition, Fitch has affirmed Ero's senior unsecured notes at 'B'/'RR4' and affirmed and withdrawn its secured revolving credit facility rating at 'B'/'RR4' for commercial reasons. The Rating Outlook is Stable.

Ero's ratings are constrained by its relatively small size and concentration of operating production with one copper and one gold mine site in Brazil. Ero's credit profile is supported by its average-cost copper mine and robust mine lives. High liquidity and low leverage are also positive credit considerations.

Fitch is withdrawing Ero's secured revolving credit facility rating for commercial reasons.

Key Rating Drivers

Small Concentrated Production: Ero's cash flow is dependent upon the output of Caraiba, which Fitch forecasts to contribute with 43,200 MT of copper in 2023, and Xavantina, with 48,900 oz of gold. The company aims to increase annual copper output to 95,000 MT through the development of a third mining unit, Tucuma. Given the conventional mining method, recent nature of the technical report and available infrastructure near Tucuma, Fitch views the risk of delay and cost over-run as lower than average. The onset of operations will be seen as a credit positive event. Construction for this mine started in 2022. Production should begin ramping up in 2024 and Tucuma should hit nominal capacity in late 2025.

Average Cost Position: Ero's Caraiba operations, from which it sources all its copper, are placed in the second quartile of the global copper cash cost curve, according to CRU Group, at USD1.36/lb excluding royalties. High sustaining capex, royalties and other factors push the company's AISC to the lower end of the fourth quartile of the cost curve. Fitch estimates that the addition of Tucuma would leave average cash costs near the lower half of the global cash curve. The company is estimated to average a 50% EBITDA margin over the rated horizon. A 10% decrease in the copper price expected by Fitch affects EBITDA by USD18 million given price floor hedging of USD 7,716/tonne for 75% of Ero's copper output in 2023.

Reliance on Exploration: Ero Copper's strategy is to grow within its existing mining concessions in Brazil and therefore is reliant on finding additional reserves. Exploration capex in 2023 is expected to be between USD31 million and USD40 million. The company has a solid track record having more than doubled copper reserves in the period 2017-2020 at Caraiba (17 years of life of mine, the ratio of contained fines in reserves to production in 2022) and adding six years to the life of its gold mine, Xavantina (nine years of life of mine).

High Capex Pressures FCF: The largest capital projects are Pilar 3.0, which includes the Caraiba mill expansion and the construction of a new external shaft in the Pilar mine, with USD250 million total expenditure between 2022 and 2025, and the Tucuma project with about USD300 million total expenditure between 2022 and 2024. Investment plans are financed by Ero's USD400 million bond, USD490 million cash flow from operations between 2022 and 2024 and a USD150 million revolving credit facility. Capex levels are forecast to peak at USD365 million in 2023 with the development of Tucuma before tailing off when the project is completed. FCF margin is expected to turn positive in 2025, at 18%.

Decreasing Leverage: Fitch calculates 2023 EBITDA of approximately USD180 million from a projected level of USD220 million in 2022, as higher costs in combination with declining gold and copper prices pressure margins. Ero's leverage is poised to increase in 2023 but is anticipated to fall thereafter as the entrance of Tucuma boosts results. Gross and net debt/EBITDA of about 2.3x and 1.9x are projected in 2023. The ramp up of Tucuma is expected to more than offset the decline in prices and current inflationary pressures setting gross and net leverage below 2.0x and 1.5x on average in the rating horizon.

Derivation Summary

Ero's scale of production and degree of diversification with 46,300 MT of copper from a single site plus 42,700 oz of gold from a different operation in 2022 is larger and less concentrated than Taseko Mines (B-/Stable) of about 34,000 MT of attributable copper from one site in Canada; similar to Aris Mining's (B+/Stable) 230,000 oz of gold from two sites in Colombia but lower than Eldorado Gold's (B+/Stable) 450,000 oz of gold from a number of mines in Turkey, Greece and Canada; or Hudbay Minerals' (BB-/Stable) 120,000 MT of copper, 220,000 oz of gold, 60,000 MT of zinc, 2.6 million of silver and 1,100 MT of molybdenum from two mining units in Canada and Peru.

Copper contributes with more than 85% of Ero's revenue. Most of Ero's peers have a degree of revenue concentration on either copper (Taseko at 90%, Hudbay at 55%) or gold (Aris and Eldorado at 100%), but Hudbay shows a wider product diversification into gold (20%), zinc (10%), molybdenum (12%) and silver (3%).

The mine life of Ero (17 years in Caraiba) is larger than Aris Mining's four years, similar to Hudbay's 16 years or Eldorado Gold's 17 years, but lower than Taseko's 23 years.

The second quartile cost position in the cost curve of the most relevant metals and operations of Ero is slightly worse than that of Hudbay Minerals (at first or second), but better than that of Eldorado Gold (second or third), Aris Mining (third) or Taseko Mines (fourth).

Profitability in the near term of more than 50% for Ero is expected to be the highest among peers, such as Aris Mining (40%), Eldorado Gold (33%), Hudbay Minerals (30%) and Taseko (25%).

The gross leverage expected for Ero of about 2.0x over the rated horizon is lower than that of Taseko (4.0x) or Aris Mining (2.5x), and similar to that of Hudbay (2.0x) and Eldorado Gold (2.0x).

Under Fitch's Country-Specific Treatment of Recovery Ratings Rating Criteria, recovery ratings are capped at 'RR4' given concentration of operations in Brazil.

Key Assumptions

Fitch's Key Assumptions Within the Rating Case for the Issuer

Copper price at USD8,000/tonne in 2023, USD7,500/tonne in 2024, and USD7,500/tonne in 2025;

Gold price at USD1,600/oz in 2023, USD1,400/oz in 2024 and USD1,300/oz in 2025;

Average annual copper sold at about 44,200 tonnes in 2023-2025 from Caraiba, 5% below guidance midpoint;

Average annual gold sold at 52,700 oz in 2023-2025, 5% below guidance midpoint;

Tucuma begins producing in 2H24;

No dividends or share-repurchases;

Capex average USD250 million per year in 2023-2025, including Tucuma development.

RATING SENSITIVITIES

Factors that could, individually or collectively, lead to positive rating action/upgrade:

Visibility into successful completion of the Tucuma project;

Increasing size and diversification over the medium term;

Financial policies in place resulting in consolidated total debt/EBITDA after minority distributions anticipated to be sustained below 3.0x.

Factors that could, individually or collectively, lead to negative rating action/downgrade:

Increased costs or material disruption at Caraiba;

Total debt/EBITDA after minority distributions anticipated to be sustained above 4.0x;

Large debt-funded acquisitions;

Negative FCF on a sustained basis.

Best/Worst Case Rating Scenario

International scale credit ratings of Non-Financial Corporate issuers have a best-case rating upgrade scenario (defined as the 99th percentile of rating transitions, measured in a positive direction) of three notches over a three-year rating horizon; and a worst-case rating downgrade scenario (defined as the 99th percentile of rating transitions, measured in a negative direction) of four notches over three years. The complete span of best- and worst-case scenario credit ratings for all rating categories ranges from 'AAA' to 'D'. Best- and worst-case scenario credit ratings are based on historical performance. For more information about the methodology used to determine sector-specific best- and worst-case scenario credit ratings, visit https://www.fitchratings.com/site/re/10111579.

Liquidity and Debt Structure

Satisfactory Liquidity: As of Sept. 30, 2022, Ero held approximately USD360 million of cash and cash equivalents, and USD75 million of undrawn availability under a revolving credit facility. The undrawn revolver availability increased to USD150 million due in 2026 upon closing of the amended revolver in January 2023. Ero's senior unsecured USD400 million bond is due in 2030. Maturities of equipment loans will be fairly minimal. Fitch expects liquidity to be sufficient to support existing operations and development of Tucuma under its rating case.

Issuer Profile

Ero Copper Corp., headquartered in Vancouver, B.C., owns a 99.6% interest in the Caraiba copper operations in Bahia, Brazil and 97.6% in the Xavantina gold mine located in Mato Grosso, Brazil. Ero also owns the Tucuma Iron Oxide Copper Gold type development copper project located in Para, Brazil.

REFERENCES FOR SUBSTANTIALLY MATERIAL SOURCE CITED AS KEY DRIVER OF RATING

The principal sources of information used in the analysis are described in the Applicable Criteria.

ESG Considerations

Unless otherwise disclosed in this section, the highest level of ESG credit relevance is a score of '3'. This means ESG issues are credit-neutral or have only a minimal credit impact on the entity, either due to their nature or the way in which they are being managed by the entity. For more information on Fitch's ESG Relevance Scores, visit www.fitchratings.com/esg

RATING ACTIONS

Entity / Debt

Rating

Recovery

Prior

Ero Copper Corp.

LT IDR

B

Affirmed

B

senior unsecured

LT

B

Affirmed

RR4

B

senior secured

LT

WD

Withdrawn

B

senior secured

LT

B

Affirmed

RR4

B

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Additional information is available on www.fitchratings.com

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