Chapter 4

Cost Position

Harita calls itself a low-cost producer in every annual report, but never publishes its own cash cost. The number that actually carries the claim is buried in the segment note: its nickel mining business ran a 45% gross margin in 2025, while its consolidated processing (RKEF ferronickel) earned barely 21% — the same thin conversion economics its listed peers disclose. The cost edge is real and it is upstream, in captive Obi Island ore. It is also shared across the island and defensive rather than pricing-power, which is why it steadies earnings through the downturn without lifting the price.

A claim the filings assert but never quantify

Across four annual reports Harita returns to the same language. It aims "to remain the lowest cash cost producer" [1], and in 2025 frames "cost leadership" as the tool that sustains "its position as a low cost producer" against a pressured nickel price [2]. Management attributes the advantage to upstream–downstream integration on Obi Island, "where mining concessions and processing facilities are located within a single integrated industrial cluster," so that "proximity between mines and smelters reduces logistics costs" [3].

What the filings never give is a figure. Harita describes its cash cost as "competitive… among industry peers" [4] but discloses no dollars-per-tonne, no cost-curve position, and no ranking. Two of its Indonesian peers do publish exactly that. So the claim has to be tested indirectly — through the margins the audited statements do report, and against the peer numbers that are in the open.

Where the margin actually comes from

Harita reports two segments. The split is the most important exhibit in this chapter, because the cost advantage lives almost entirely in one of them.

Source: derived from FY2025 audited segment note, Nickel Mining vs Nickel Processing [5].

Source: FY2025 audited segment note (2024 comparative on the facing page) [6] [7].

The mining segment sold Rp10.1tn of ore in 2025 (Rp7.2tn external plus Rp2.9tn to Harita's own smelters) at a Rp4.58tn gross profit — a 45.3% gross margin, down only modestly from 49.7% in 2024 [8]. The processing segment, three times larger by external revenue at Rp22.5tn, earned a Rp4.63tn gross profit — a 20.6% margin [9]. The two segments generated almost the same gross profit in absolute terms.

Source: FY2025 audited segment note (2024 comparative on the facing page) [10] [11].

The reading is direct: mining is a quarter of external revenue but nearly half of gross profit. Harita's cost advantage is a mining cost advantage. It sits on cheap, high-grade laterite it digs itself, and captures the full mine-to-metal margin rather than paying it away to an ore supplier. The ferronickel smelting that sells to stainless-steel mills is, on its own, a commodity conversion business earning a fifth on revenue — no better than a peer that has to buy its feed. What lifts the blended operating margin to 28.3% [12] is that Harita owns both links of the chain. It also explains the earnings resilience the report has already documented: gross margin held near 33% while the nickel price fell about 10% in 2025 [13], because the mining margin is a spread the company controls at both ends.

The benchmark Harita won't print

Two indexed Indonesian peers publish the cash-cost number Harita omits, and they run genuinely comparable models — own mine plus RKEF/NPI smelters. Merdeka Battery (MBMA) reported an average RKEF cash cost of US$9,406 per tonne of nickel in 2025, down from US$10,307 in 2024, against an average selling price of US$11,383 — a cash margin near 17% at the smelter [14]. Harum Energy's nickel unit ran a blended cash cost of US$11,225 per tonne over the first nine months of 2025 [15]. Both sit well below the LME average of roughly US$15,160 per tonne for the year [16] — the whole Indonesian laterite complex is low on the global curve.

Sources: MBMA FY2025 Annual Report [17]; Harum Energy 9M 2025 summary [18].

Harita's 20.6% processing gross margin is squarely in this pack — its smelters are neither visibly cheaper nor dearer than MBMA's. The gap that makes Harita look like a cost leader is not in the furnace; it is the 45% mining margin sitting on top, which a pure smelter simply does not have. That is a fair inference rather than a like-for-like fact, because Harita gives no cash cost of its own — an investor taking the "lowest cash cost" label at face value is trusting a claim the company has chosen not to substantiate with a number.

How durable, and how exclusive

Three things underwrite the mining margin, and each carries a qualification.

Captive high-grade ore, but on a finite clock. Harita mines its own saprolite and limonite on Obi Island — 30.59 million wet tonnes sold in 2025, up 28.8% on the year [19], feeding its own 240,000-tonne RKEF capacity and its associates' HPAL plants. Total reserves and resources stand at 310.8 million wet tonnes [20]. At the 2025 extraction pace that is roughly a decade of runway — and the pace is rising fast, with a further 24% ore-volume increase guided for 2026 as KPS phase 3 starts [21]. The captive-ore edge is real but it is not a multi-decade endowment; it depends on Harita replacing reserves as quickly as it mines them.

The cobalt credit sits in the associates, not here. The lowest-cost, highest-value processing — HPAL turning limonite into MHP with a cobalt by-product, about 14,250 tonnes of contained cobalt a year — runs through PT HPL and PT ONC, which Harita accounts for by the equity method, not in these consolidated margins [22]. The by-product economics that most flatter a nickel cost curve accrue to the associate line the report examines elsewhere (The Associate Stakes), not to the consolidated cost position measured here.

The advantage is shared across the island. Obi Island is not Harita's alone. Lygend Resources — the Ningbo-based partner in Harita's own HPAL joint ventures — describes an "independent industrial park on the Obi Island," using "rich local laterite nickel resources" and integrated logistics "while minimizing operation and production costs" in almost the same terms [23]. MBMA runs the same integrated mine-plus-smelter model in Sulawesi. The location-and-integration playbook that gives Harita its edge over ex-Indonesia producers is the standard operating model of the Indonesian nickel build-out, replicated by well-funded rivals — including Harita's own affiliate on the same island.

The read

The evidence supports a narrow cost moat, not a wide one. It is real: a 45% mining margin, quantified in the audited segment note, that held through a falling nickel price and lifts the consolidated business above the low-teens smelter economics of comparable peers. But it is upstream-specific, shared across the Obi Island cluster and the wider Indonesian low-cost basin, and it runs on a reserve base of about a decade at the current pace. It is a defensive advantage — it lets Harita stay comfortably profitable while higher-cost tonnes elsewhere lose money — not an offensive one: in a structurally oversupplied market the same low-cost flood that protects Harita is what caps the price, so the moat buys survival and steady cash, not pricing power.

Two things would change this read. If Harita began disclosing its own cash cost and it confirmed a durable gap below MBMA and Harum, the moat would earn a wider label. Conversely, because Indonesia's ore reference price tracks the LME, a sustained slide in the nickel price would compress the very mining spread that is the whole advantage — the margin of safety in the cost position is only as wide as the ore price that sets it.