All-In Sustaining CostNarrow moat

All-in sustaining cost is the mining industry's honest measure of what it truly costs to keep producing an ounce of gold — not just the cash spent digging and milling, but the sustaining capital to keep the mine running, the royalties owed, and the corporate overhead. It was adopted industry-wide because the older 'cash cost' number flattered everyone by ignoring the constant reinvestment mining demands. AISC tells you the real break-even.

Barrick's gold AISC has run around $1,400 to $1,650 an ounce in recent years¹, placing it competitively but not at the very bottom of the curve. Against a gold price above $4,000, that leaves a margin of well over $2,000 an ounce — the source of the cash flood. Against a gold price of $1,300, as prevailed a decade ago, the same cost would leave almost nothing.

The number to watch is the direction of travel. AISC tends to drift upward over time as grades fall and mines age, and it rises with the gold price itself through royalties. Barrick works constantly to hold the line through scale, efficiency, and mix, but the structural gravity is upward. A low and stable AISC is the whole basis of Barrick's resilience; it is also a number the company must fight to defend every single year, which is not how a moat is supposed to work.