| Metric | Operator FS (July 2025) | Operator IA (June 2025) | Spread / driver | Most-defensible reading | Confidence |
|---|---|---|---|---|---|
| After-tax NPV @ 8% | $1.58bn | $2.37bn | $0.79bn (50% of FS) — scope difference | FS $1.58bn for bankability; IA upside is real but not bankable | HIGH |
| After-tax IRR | 23.3% | 22.9% | 0.4 pp | FS 23.3% — converges across both | HIGH |
| Mine life | 18 years | 22 years | 4 years — reserve-vs-resource scope | FS 18-yr for screening; 22-yr extension dependent on infill drilling | HIGH |
| Mineralisation tonnage | 52.2 Mt P+P reserves | 67.9 Mt M+I+Inferred | 15.7 Mt (23%) — categorisation | FS reserves bankable; resource conversion 77% indicates mature engineering | HIGH |
| Pre-production CAPEX | $942M | not directly comparable | FS scope is initial-development phase only | FS $942M for screening; sustaining capex separate per platform DCF v1.0.38 framework | MEDIUM |
| AISC ($/lb Ni net of Cu+Co credits) | $3.36/lb (first quartile per CRU) | not separately disclosed | Industry curve context: Indonesian laterite-HPAL benchmark $5-7/lb | FS $3.36/lb anchors first-quartile positioning; structurally distinct from Indonesian cohort | MEDIUM |
| Recovery rates | 87.3% Ni / 95.6% Cu / 89.6% Co (flotation) | Same — IA used same metallurgical basis | Hydromet Technology upside potential — Q1 2026 FS targeted | FS rates for screening; Hydromet upside as roadmap optionality | HIGH |
Confidence tier convention. HIGH = direct primary-source operator disclosure with regulatory filing (Form 6-K, S-K 1300, NI 43-101) or matched cross-source convergence. MEDIUM = single-source or scope-limited operator disclosure where additional context would strengthen the reading. LOW = inference or where multiple defensible readings exist without single-anchor consensus. Same convention applied across all four case-study Benchmark Spreads.
| Source | Value | Date | Scope |
|---|---|---|---|
| Lifezone Form 6-K Feasibility Study TRS | $1.58bn after-tax | 18 July 2025 | 18-year M&I-only reserves; initial development phase; $8.49/lb Ni reference price |
| Lifezone Initial Assessment TRS | $2.37bn after-tax | 2 June 2025 | 22-year mine plan; M+I+Inferred resources; $8.49/lb Ni reference price; same recovery basis |
| Cycle-1.5 reference DCF (platform Python) | $5.5bn target reconciling at $1.06/lb Ni cash cost | 4 May 2026 | Reference reconciliation harness; cycle-1.5 results |
| Cycle-1.5 platform DCF v1.0.38 at literal $0.48/lb cash cost | $8.59bn (over-credits at literal first-5-years cash cost) | 9 May 2026 | Platform DCF with default v1.0.38 fixes; documented over-credit at literal-spec inputs |
The FS-vs-IA delta of $0.79bn (50% of FS NPV) is the headline divergence. The structural driver is scope, not disagreement: the FS is bankability-focused on the initial 18-year M+I-only reserves; the IA includes a broader 22-year scenario incorporating Inferred resources that are categorised as too speculative geologically to support reserves under SEC S-K 1300. Neither is wrong; they answer different questions.
The platform-DCF reconciliation layer adds a separate dimension: at literal-spec $0.48/lb cash cost (which is the first-5-years cash cost from the FS, used as if it applied LoM), both reference and platform DCF over-credit substantially. The reconciling cost where the reference DCF produces the FS-aligned $5.5bn proxy is $1.06/lb. The platform v1.0.38 with three structural fixes converges toward but does not fully match the reference, with platform reconciling cost of $1.28/lb. Cycle-2 work item is named.
For DFI bankability screening: $1.58bn (FS). This is the auditable, M&I-only, sponsor-disclosed value supporting Final Investment Decision. The IA $2.37bn upside is real and represents the resource-extension trajectory under successful infill drilling, but is not bankable for project-finance debt sizing without conversion to reserves under S-K 1300. The platform-DCF reconciliation layer is informative for stress-testing the FS's underlying assumptions and surfaces that literal-spec first-5-years cash cost should not be used as LoM constant — but the FS's reconciling-cost framing produces an internally consistent $1.58bn central estimate.
The 50% FS-vs-IA delta is structural, not anomalous. It is the difference between bankable economics (FS) and full-resource-potential economics (IA). For DFI screening, the FS is the floor; the IA is the upside contingent on subsequent drilling and conversion. A senior reader should expect institutional credit memo work to anchor on FS numbers with sensitivity overlays for Inferred-conversion scenarios.
| Source | Value | Date | Scope |
|---|---|---|---|
| Lifezone FS TRS | 23.3% after-tax | 18 July 2025 | $8.49/lb Ni reference; 18-year scope |
| Lifezone IA TRS | 22.9% after-tax | 2 June 2025 | $8.49/lb Ni reference; 22-year scope |
| Platform DCF v1.0.38 reconciling cost | 72.5% IRR at platform reconciling cost $1.28/lb | 9 May 2026 | Cycle-1.5 reconciliation; published as documentation of platform tool sensitivity |
| Platform DCF v1.0.38 literal $0.48/lb | 102.5% IRR (no longer implausible after v1.0.38 fixes; was 160.6% under v1.0.37) | 9 May 2026 | Literal-spec inputs documented as over-crediting at first-5-years cash cost |
FS and IA converge at ~23% IRR despite the NPV scope difference — IRR is a rate-of-return measure that is structurally less sensitive to mine-life extension than NPV. The 0.4 percentage point delta between FS (23.3%) and IA (22.9%) is methodologically minor and indicates the same project-economics underpinning across both.
The platform DCF reconciliation produces a higher IRR than the FS at the FS-aligned reconciling cost — this is documented in cycle-1.5 results as the residual platform-vs-reference convergence gap that cycle-2 will address.
23.3% (FS). The IA-FS convergence at this dimension is informative — both operator analyses produce the same rate-of-return signal despite different mine-life scopes, which strengthens confidence in the underlying economic model. The platform DCF over-credit at literal-spec is documented; cycle-2 will narrow the residual gap.
| Source | Value | Date | Scope |
|---|---|---|---|
| Lifezone FS TRS | 18 years | 18 July 2025 | P+P reserves only; initial development phase |
| Lifezone IA TRS | 22 years | 2 June 2025 | M+I+Inferred resources; broader scenario |
| Operator stated long-term potential | Beyond 22 years | July 2025 webcast and IR statements | Resource estimate at broader project level supports stated long-term production extension potential |
The 4-year FS-vs-IA mine-life difference is the same scope question as the NPV spread. FS captures M&I-supported reserves; IA captures Inferred-included resources. Industry benchmark for Inferred-to-Reserves conversion in sulphide deposits ranges 40-70% depending on geological continuity and infill drilling success. The 4-year extension corresponds to ~15.7 Mt of additional M&I+Inferred resource not yet converted to reserves.
For DFI screening: 18 years (FS reserves-supported). Project-finance debt sizing should anchor on M&I-only reserves. The 4-year extension is realistic but contingent on subsequent infill drilling — a credit committee should treat as upside-not-base. Operator's stated potential beyond 22 years (resource-extension scenarios) is further-removed and should be treated as longer-horizon optionality, not screening assumption.
| Source | Tonnage | Grade | Date | Categorisation |
|---|---|---|---|---|
| FS Proven + Probable Reserves | 52.2 Mt | 1.98% Ni / 0.27% Cu / 0.15% Co | 18 July 2025 | Reserves under S-K 1300 (Modifying Factors applied) |
| IA Measured + Indicated + Inferred Resources | 67.9 Mt | 1.93% Ni / 0.26% Cu / 0.14% Co | 2 June 2025 | Resources (Inferred is too speculative geologically to support Modifying Factors per S-K 1300) |
| Total contained metal (FS basis at LoM) | 902 kt Ni / 134 kt Cu / 69 kt Co | — | 18 July 2025 | Operator-published over 18-year LoM at 100% project basis |
The 15.7 Mt delta (23%) is the Inferred-to-Reserves gap. Reserves are 77% of the M+I+Inferred resource — at the high end of the 60-85% conversion range typical for sulphide deposits at FS stage. This reflects mature engineering on the asset (cumulative historical investment exceeding $435M and approximately 620 km of drilling per Lifezone disclosures), not aggressive scope.
Average grade is essentially identical across reserves (1.98%) and resources (1.93%) — the 0.05 pp difference is within typical reserve-resource grade variance and indicates consistent geological characterisation across the broader resource envelope.
52.2 Mt P+P reserves at 1.98% Ni for screening. The reserve-resource conversion ratio of 77% is mature; the 15.7 Mt resource-but-not-reserves represents real upside contingent on infill drilling and successive Modifying Factor application. A DFI screening posture should treat reserves as the bankable basis and resource-extension as the upside scenario in stress-test sensitivities.
| Source | Value | Date | Scope |
|---|---|---|---|
| Lifezone FS TRS pre-production CAPEX | $942M | 18 July 2025 | Initial development phase: 3.4 Mtpa underground mine + concentrator |
| Comparable-asset benchmark: $/tpa concentrator capacity | $277/tpa ore for Kabanga | Derived from FS | African underground sulphide development reasonable range $200-400/tpa |
| Sustaining capex (platform DCF v1.0.38 default) | $50M/yr default | 9 May 2026 | Default placeholder per platform DCF; user-overridable per asset |
The FS pre-production CAPEX of $942M is the operator-disclosed figure. Comparable-asset benchmarks for African underground sulphide developments at 3-5 Mtpa concentrator scale typically fall in the $200-400/tpa range — Kabanga at $277/tpa sits comfortably mid-range. The figure is internally consistent with the asset's scope.
Sustaining capex is structurally separate. The platform DCF v1.0.38 default of $50M/yr is a starting placeholder; institutional users should override per asset using operator-published sustaining-capex guidance where available. Lifezone has not disclosed a separate LoM sustaining capex figure as of the May 2026 cutoff; this is a known unknown for institutional credit memo work.
$942M pre-production CAPEX (FS) for screening. The figure is consistent with comparable-asset benchmarks at $277/tpa ore. Sustaining capex remains operator-undisclosed at the LoM-aggregated level; institutional users should request specific guidance from Lifezone IR or apply industry benchmarks of 1.5-3.0% of pre-production CAPEX per year for sulphide concentrators.
| Source | Value | Date | Scope |
|---|---|---|---|
| Lifezone FS TRS AISC | $3.36/lb Ni net of Cu+Co credits | 18 July 2025 | LoM average; net of byproduct credits at FS price assumptions |
| CRU 2025 nickel cost curve (Lifezone-attributed) | First quartile of global nickel AISC industry-wide | 2025 | CRU Group nickel asset services cost model — comparison curve |
| Indonesian laterite-HPAL benchmark | $5-7/lb (highly variable by asset and HPAL ramp-up status) | Multiple sources 2024-2025 | Concentration: 64% of global nickel production from Indonesia per IEA Critical Minerals Outlook 2025 |
| First-5-years cash cost (FS) | $0.48/lb Ni | 18 July 2025 | First-5-years operating cost from start-up; not LoM constant |
Two distinct cost concepts must not be conflated. The AISC of $3.36/lb is the LoM average all-in sustaining cost net of Cu+Co byproduct credits — the industry-standard benchmark for cost positioning. The first-5-years cash cost of $0.48/lb is the early-LoM operating cost, materially lower because (a) higher early-mine grades, (b) byproduct credits highest at Cu+Co price-strength periods, (c) sustaining capex deferred to later years. Treating $0.48/lb as a LoM constant produces the over-credit documented in cycle-1.5 reconciliation; the platform DCF v1.0.38 form-clarification deferred to v1.0.39 addresses this user-input distinction.
First-quartile positioning per CRU's 2025 cost curve is structurally distinct from Indonesian laterite-HPAL economics. The Indonesian cohort represents 64% of global nickel production but operates on a different cost-curve regime (HPAL refining; tropical climate; political risk); Kabanga's African sulphide-flotation route produces different cost dynamics that comparable-cost analysts must treat separately.
$3.36/lb LoM AISC for cost-curve positioning. $0.48/lb first-5-years cash cost as ramp-up indicator only. Institutional users running DCF stress-tests should apply LoM-average AISC trajectory (which moves from $0.48/lb early-LoM toward end-of-mine cash costs as grades decline and sustaining capex applies) rather than a LoM-constant cost. The first-quartile CRU positioning is the asset's structural advantage; Indonesian laterite comparable analysis requires separate cost-curve treatment.
| Source | Ni recovery | Cu recovery | Co recovery | Date / scope |
|---|---|---|---|---|
| FS TRS metallurgical basis | 87.3% | 95.6% | 89.6% | 18 July 2025 — conventional froth flotation |
| IA TRS metallurgical basis | 87.3% | 95.7% | 89.6% | 2 June 2025 — same froth flotation basis |
| Hydromet Technology potential upside | Q1 2026 FS targeted | — | — | Glencore partnership on US PGM recycling demonstrates Hydromet commercialisation pathway; Kabanga-specific FS not yet published |
FS and IA produce essentially identical recoveries (Cu rounding difference of 0.1 pp is methodologically negligible). This convergence indicates the metallurgical basis is well-characterised across scenarios and not a structural source of forecast risk.
The Hydromet Technology layer is the optionality. Lifezone's proprietary refining process targets feasibility study completion in Q1 2026 for Kabanga-specific application. If Hydromet delivers materially higher overall recoveries or eliminates intermediate concentrate logistics steps, the asset's economics could improve. The Glencore partnership on US PGM recycling demonstrates Hydromet commercialisation outside Kabanga; transferability of the technology to Kabanga's specific ore is the FS question.
FS recoveries (87.3% Ni / 95.6% Cu / 89.6% Co) for screening; Hydromet upside as roadmap optionality. Institutional users should anchor base-case sensitivity on conventional flotation recoveries; treat Hydromet as conditional upside contingent on Q1 2026 FS publication. Hydromet downside (technology risk, ramp-up complexity, capital intensity) should also be considered if institution incorporates the upside.
For an institutional capital allocator screening Kabanga for project-finance, equity, or off-take engagement, the spread provides three operational inputs:
This Benchmark Spread will be updated on three triggers per the published Benchmark Spread Methodology: (a) new primary disclosure from Lifezone (quarterly updates, FID-stage updated FS, Hydromet Q1 2026 FS); (b) substantive new third-party analysis with material divergence; (c) the platform's quarterly deep audit cohort (next Kabanga audit_due 2026-07-18 per the audit-overdue badge mechanism). Each update is recorded in the public Audit Log.