South West Arkansas Project Feasibility Study: $1.27B NPV, 18.2% IRR
Standard Lithium Ltd.'s South West Arkansas Project in Lafayette County, Arkansas, United States (24 km west of Magnolia) has a Feasibility Study outlining an after-tax NPV of $1.27B, an after-tax IRR of 18.2%, and initial capital of $1.45B. The mine plan runs 20 years at about 22155.8 t LCE/a per year.
Standard Lithium Ltd.'s South West Arkansas Project has reported Feasibility Study results for the lithium project in Lafayette County, Arkansas, United States (24 km west of Magnolia). The study headlines an after-tax net present value of $1.27B at a 8% discount rate. It reflects Standard Lithium Ltd.'s (SLI.V) latest disclosed economics for the asset.
Economics. The after-tax NPV is $1.27B using a 8% discount rate. After-tax IRR is 18.2%. Initial capital expenditure is estimated at $1.45B, with life-of-mine sustaining capital of $123M. The study models a payback period of 4 years. All-in sustaining costs are pegged at 5923.84 USD/t LCE. Economics are based on Selling Price US$22,400/t LCE.
Production and mine plan. The project envisions a brine (wellfield, dle) operation. Life of mine is 20 years. Average annual production is approximately 22155.8 t LCE/a. Average head grade is 481 mg/L Li. Metallurgical recovery averages 89.2%.
Resources and ownership. The company holds a 55% interest in the project.
These figures are extracted from Standard Lithium Ltd.'s technical disclosures and reflect the most recent Feasibility Study on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.
Reserves & Resources
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Measured | — | 514 mg/L Li | 173 kt Li; 922 kt LCE |
| Indicated | — | 293 mg/L Li | 48 kt Li; 255 kt LCE |
| Measured & Indicated | — | 442 mg/L Li | 221 kt Li; 1,177 kt LCE |
| Inferred | — | — | 278 kt LCE |
Our Analysis
- IRR after-tax
- 18.2%
higher than 16% of 19 projects we track
- NPV after-tax
- $1.27B
higher than 23% of 22 projects we track
- Initial capex
- $1.45B
114% of NPV
costlier than 82% of 22 projects we track
- Payback
- 4yrs
slower than 73% of 11 projects we track
- Mine life
- 20yrs
- Discount rate
- 8%
- Study price assumption
- Selling Price US$22,400/t LCE
A US$555M company proposing to spend US$1.45B before it produces a tonne of lithium: that ratio, roughly 2.6 times the entire market capitalisation, is the fact that governs everything else in this feasibility study. No small-cap board writes a cheque of that size from the balance sheet. It comes from project debt, a partner, an offtake-linked structure, streaming, or equity issued at whatever terms the market offers, and each route takes something from existing holders. Even a heavily debt-funded build leaves a company of this size carrying completion risk on a sum several times its own value.
The economics themselves are respectable rather than exceptional. An 18.2% after-tax IRR sits above the roughly 15% threshold developers typically need to attract project finance, but it ranks higher than only 16% of the 19 lithium projects we track, and the US$1.27B after-tax NPV ranks higher than 23% of 22 peers. Payback of four years is moderate, ahead of only 27% of the 11 projects we compare. The 8% discount rate is a reporting convention, not a hurdle, and carries no signal. What the study does have going for it is stage: this is feasibility-level work, a build-ready estimate in a plus or minus 15% band, and it deserves more weight than a scoping study would. Twenty years of mine life in Lafayette County, Arkansas, in a mining-friendly US jurisdiction, supports that. The US$22,400/t LCE selling price is the study's own assumption, and the obvious sensitivity: the returns rest on that number holding, and a softer realised price would compress them.
The capital intensity is not disqualifying, but it is the constraint. At 114% of NPV, the build cost is high, though lower than 18% of the 22 lithium projects we track, and this is one of four projects the company carries, which spreads the funding burden but also splits management attention and capital. The question that decides this project is not the IRR. It is whether this company can raise US$1.45B without handing away so much of the asset, in equity or partner economics, that the return to today's shareholders no longer resembles the study.
Our take, benchmarked against the project economics in the Mining Stocks database. Figures are estimates drawn from company technical reports — not investment advice; always verify against the source filing.
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