Gold vs Copper Mining: Costs, Grades and Margins

Gold and copper mines differ most in how much rock they move and what each tonne of that rock is worth. Barrick’s reserves at the end of 2025 averaged 0.98 grams of gold per tonne of ore and 0.46% copper. That means about 32 tonnes of gold ore for each troy ounce of metal, but about 217 tonnes of copper ore for each tonne of copper. Gold is a small, high-value product that is mostly held as investment and jewellery. Copper is a large-volume industrial metal that goes into buildings and power equipment. The rest of this page compares grades, output, costs, processing, demand, environmental risks and the licence decisions that follow.

Terms used below. Grade is the share of metal in the rock: grams per tonne (g/t) for gold, and percent (% Cu) for copper. A troy ounce is 31.1035 grams. Recovery is the share of the metal in the ore that the plant actually captures. AISC (all-in sustaining cost) is a company-reported cost per ounce of gold or per pound of copper that includes mine running costs and the capital needed to keep the mine going. Concentrate is a metal-rich powder made by crushing ore and separating the valuable minerals. This page gives facts from official and company filings. It is not investment advice.

Gold vs copper mining at a glance

The table sets the two metals side by side. Grades and costs come from one company that mines both metals, Barrick, so the figures share one accounting basis. World output comes from the USGS. Every value carries its source and year in the sections below.

One point is easy to miss. The two metals are not separate worlds. The USGS reports that about 7% of US gold output is a byproduct of processing base-metal ores, chiefly copper ores (2025 estimate). A later section explains why.

How we compared the two metals

We used the same three rules for every number. First, the source must be a geological survey, a statistics body, an industry body or a company annual report or stock-exchange filing that we opened. Second, every figure carries its year, because costs and prices change quickly. Third, where we calculated a ratio ourselves, the text says so. We did not use broker research or promoter pages.

The company numbers come from Barrick’s 2025 annual report and Freeport-McMoRan’s annual filing. A single company is a sample of one, not an industry average. Costs differ a lot between mines of the same metal, so read the cost figures as illustrations of how each metal behaves, not as benchmarks.

Ore grade and tonnes moved

Grade explains most of the other differences. A gold mine treats rock that holds roughly one part in a million of gold. A copper mine treats rock that holds roughly one part in two hundred of copper. Barrick reported attributable gold reserves of 85 million ounces at an average 0.98 g/t, and copper reserves of 18 million tonnes of contained copper at 0.46%, both at the end of 2025. Reserves are the part of a deposit that is shown to be economic at stated prices. For Barrick-operated copper assets, Barrick used US$3.25 per pound for reserves.

Averages hide a wide spread. Barrick’s Fourmile discovery in Nevada has indicated resources of 4.6 million tonnes grading 17.59 g/t (2.6 million ounces) at the end of 2025. Resources are mineralised rock with reasonable prospects of economic extraction. They are not reserves. The point is that high-grade gold exists, while copper deposits that are mined at scale mostly sit near half a percent.

Copper’s most important deposit type is the porphyry. The USGS says porphyry copper deposits supply more than 60% of annual world copper production and about 65% of known copper resources, at an average grade of 0.44% Cu in 2008.

The calculator below turns grade into rock tonnes and gross value per tonne of ore. It shows why a gold mine can earn well from a small amount of rock, while a copper mine needs very large daily tonnages and long mine lives. The default grades are Barrick’s reserve averages. The prices are round examples. Replace them with today’s price.

Where gold and copper are mined

Copper mining is more concentrated by country than gold mining. The USGS estimates that Chile, Congo (Kinshasa) and Peru together mined about 49% of the 23 million tonnes of copper produced worldwide in 2025 (5,300, 3,200 and 2,700 thousand tonnes, from a world total of 23,000; our calculation). For gold, China, Russia and Australia together mined about 29% of the 3,300 tonnes (380, 310 and 280 tonnes; our calculation).

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Gold mine output by country

Tonnes of gold, 2025 estimate; eight selected countries (Uzbekistan, also 130 tonnes, not shown)

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Copper mine output moves by country

Thousand tonnes of recoverable copper; eight selected countries (Australia, Kazakhstan and Mexico not shown)

The copper chart shows how quickly output can move. Russia’s estimated output rose from 1,020 to 1,300 thousand tonnes between 2024 and 2025, and Indonesia’s fell from 1,010 to 710 thousand tonnes, according to the USGS Mineral Commodity Summaries. The 2025 figures are USGS estimates.

Gold output is spread across more countries. After China, Russia and Australia come Canada at 200 tonnes, the United States at 160 and Ghana at 150 (USGS, 2025 estimates). Nevada accounted for about 64% of US gold output and Alaska for about 22%. Arizona was the top US copper state, with around 70% of domestic copper output.

Reserves tell a similar story. The USGS puts world gold reserves at 66,000 tonnes and copper reserves at 980 million tonnes. Divided by 2025 output, that is about 20 years of supply for gold and about 43 years for copper (our calculation). Reserves depend on price and on the exploration that has been done, so they are not a countdown.

Costs and margins compared

Barrick reports both metals under the same company roof, which makes it a handy comparison. In 2025 it sold 3,318 thousand ounces of gold at a realized price of US$3,501 per ounce, with an all-in sustaining cost of US$1,637 per ounce. Its copper division produced 220 thousand tonnes at a realized price of US$4.72 per pound, with an all-in sustaining cost of US$3.20 per pound and a C1 cash cost of US$2.14 per pound (Barrick, 2025). Barrick defines C1 cash costs per pound as excluding royalties, production taxes and non-routine charges, because it does not count them as direct production costs.

Put as shares of price, the gold AISC was about 47% of the realized price and the copper AISC about 68% (our calculation). That left about US$1,864 per ounce of gold and US$1.52 per pound of copper before tax and growth spending. These ratios are for one company in one year. Even so, copper’s cost base is a larger share of its price, so a fall in the copper price squeezes margins faster.

Costs move with the price. Barrick’s own 2026 guidance, built on a US$5.50 per pound copper assumption, expects a copper AISC of US$3.45 to US$3.75 per pound, higher than the 2025 result of US$3.20. Gold guidance assumes US$4,500 per ounce and an AISC of US$1,760 to US$1,950 per ounce. Royalties and taxes follow price in both metals.

Copper capital needs are large. Freeport-McMoRan describes a possible expansion of its Bagdad mine in Arizona that would add 200 to 250 million pounds of copper a year. Its filing estimates incremental capital of about US$3.5 billion, an incentive copper price of about US$4.00 per pound and three to four years to build. An incentive price is the price at which the company says a project would be worth building.

Byproducts change copper’s cost line. Freeport reports its copper costs net of gold and molybdenum credits. Its filing estimates 2026 unit net cash costs of US$1.75 per pound (excluding idle facility costs and restoration costs from the September 2025 mud rush at PTFI), based on gold at US$4,000 per ounce, and says each US$100 per ounce change in the gold price moves the cost by about US$0.03 per pound. That is a direct link between the two metals inside one cost number.

How the ore becomes metal

The mine, the crusher and the mill look similar in both industries. The chemistry that follows is different. The steps below show the route for each metal.

Infographic

Rock to metal in five steps

1. 1Mine and crushBoth metals: drill, blast, haul and crush the ore.
2. 2GrindBoth metals: grind to fine powder so the metal minerals are exposed.
3. 3Separate the metalGold: cyanide leach and carbon. Copper: flotation to concentrate, or acid leach on oxide ores.
4. 4Smelt or meltGold: melt into doré bars. Copper: smelt concentrate to anode, or electrowin from solution.
5. 5Refine and sellGold: refinery. Copper: electro-refining to cathode, sold on exchanges or as rod.

Gold is usually dissolved in a weak cyanide solution. The Society for Mining, Metallurgy & Exploration (SME) notes that cyanide leaching has been the dominant gold extraction technology since the 1970s, that cyanide has been used for over 130 years, and that the mining industry uses about 6% of the cyanide produced worldwide. The gold is then captured on carbon, stripped, melted into doré (an impure gold and silver bar) and sent to a refinery. The video below follows one nugget through those steps.

Copper takes one of two routes. In the first, the ore is crushed and ground to fine powder, mixed with water and chemicals, and sent through flotation cells where air bubbles carry copper minerals to the surface. Southern Copper’s annual filing describes milling and flotation to produce concentrate, smelting to blister and anode copper, and electro-refining to copper cathodes. Cathode is the sheet of refined copper that is traded on exchanges. In the second route, used on oxide ores, heaps of ore are sprayed with dilute sulphuric acid, and copper is recovered from the solution by solvent extraction and electrowinning (SX-EW). KGHM describes the technology as leaching in atmospheric conditions and a later extraction stage. In 2025, Freeport sold 43% of its mined copper as concentrate, 33% as cathode and 24% as rod.

The practical difference is where the value is captured. A gold mine usually sells a finished bar to a refinery. A copper mine that sells concentrate hands part of the value to a smelter, which charges for treatment and refining. Mine-gate economics therefore depend on the charges negotiated with the smelter.

▶ Follows a small clay nugget from rock to ring: drilling, crushing, cyanide dissolving, carbon capture, melting and refining. · 5:27

When gold and copper come from the same mine

Many large deposits hold both metals. Porphyry systems form around intrusions of molten rock, and the hot fluids that deposit copper often deposit gold too. The USGS model says gold was recovered as a byproduct from about two-thirds of the porphyry copper deposits it reviewed, at a median grade of 0.21 g/t in 2008, with silver recovered from about a third at a median 2.0 g/t. That gold grade is low. It matters because the ore is milled anyway for copper.

The USGS also estimates that nearly one-quarter of undiscovered US gold resources lies in porphyry copper deposits, which is one reason explorers look for the two metals together.

Companies label the split in different ways. Newmont’s annual filing treats a metal as a co-product when it makes up more than 10% to 20% of the life-of-mine sales value, and lists copper at Cadia in New South Wales, Boddington in Western Australia and Red Chris in British Columbia as co-products. Its Cadia panel cave project covers about 5 million ounces of gold reserves and 1.1 million tonnes of copper reserves. In plain terms, one orebody there pays for two metals. For a deeper look at the geology, see our guide to porphyry copper deposits and our overview of copper deposit types and top countries. The Golden Triangle of British Columbia is covered in our regional guide to porphyry deposits.

What drives demand and price for each metal

The two metals respond to different forces. Gold is bought as a store of value, so investment and central-bank buying set the price at the margin. The World Gold Council counted global gold demand of 4,999 tonnes in 2025. Investment took 2,175 tonnes, jewellery fabrication 1,638 tonnes, central banks and other institutions 863 tonnes and technology 323 tonnes (World Gold Council, Gold Demand Trends, full year 2025). Investment is therefore the largest single use, and electronics a small one.

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Where gold goes: world demand in 2025

Tonnes; investment includes bars, coins and ETFs; total 4,999 tonnes

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Where US copper is used

Share of US copper use by end market

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Gold and copper annual average prices, indexed

2021 = 100; gold in US dollars per troy ounce, copper as London Metal Exchange cash price; 2025 is a USGS estimate

Copper is consumed. The USGS cites the Copper Development Association for the split of US copper use: building construction 42%, electrical and electronic products 23%, transportation 18%, consumer and general products 10% and industrial machinery 7%. Copper demand follows construction, grids and vehicles, so it follows the industrial economy more closely than gold does.

The price record shows the difference. Using USGS annual averages, gold rose from US$1,801 per ounce in 2021 to an estimated US$3,300 in 2025, while the London Metal Exchange cash copper price went from 422.5 to an estimated 440 US cents per pound. The line chart indexes both to 2021 = 100 so the paths can be compared on one scale.

Prices on the dates we checked. The LBMA afternoon gold price was US$4,124.55 per troy ounce on 8 October 2026 (reported by Bernama; the official LBMA price is on the LBMA prices page). Cochilco, the Chilean copper commission, reports that the LME copper price averaged 613.5 US cents per pound in July 2026 and 596.6 cents over January to July 2026. Check the LBMA and LME for today’s price before you use either number.

Environmental and community differences

Both metals leave waste rock and tailings. Tailings are the finely ground rock and process water that remain after the metal is removed, usually stored behind a dam. The International Council on Mining and Metals (ICMM) set the Global Industry Standard on Tailings Management, with 15 principles and 77 auditable requirements, and its members committed to meet it. Because copper ore is lower grade, a copper mine produces more waste per unit of metal, so tailings and waste-rock handling are a larger share of the job. Our grade figures show the scale: about 217 tonnes of ore per tonne of copper, against about 32 tonnes of ore per ounce of gold.

Each metal has its own chemical issue. Gold plants that use cyanide need strict handling, storage and detox of spent solution; SME’s briefing covers the practice. Rock that holds sulfide minerals can generate acid when exposed to air and water, which the US EPA calls acid rock drainage, so waste rock needs testing and cover. Southern Copper’s filing lists sulphuric acid among the products of its smelting operations.

The video below covers seven general environmental effects of mining, each explained in plain words.

Community matters in both industries. Access to land, water rights and local jobs decide whether a mine gets permits. The details depend on the country and the project, so check the regulator and the environmental impact assessment for the site.

▶ Explains seven environmental impacts of mining in plain words, with satellite maps and photos. · 2:31

Choosing between gold and copper for a licence or project

If you hold ground or advise someone who does, the first question is what the geology supports, not which metal has the better headline. Five questions help.

1. What does the deposit model say? Orogenic and epithermal vein systems point to gold; porphyry and sediment-hosted systems point to copper, and often copper with gold.
2. How big could it be? Copper mines need scale to pay for a concentrator, power and roads. Gold can work at smaller scale if the grade is high.
3. What is the processing route? Check whether nearby plants exist, whether the ore is oxide or sulphide, and who would buy the concentrate.
4. What does the licence allow? Rules, fees and work commitments differ by country and by metal. Use the regulator or the national cadastre. Our guide to mining cadastre portals by country lists where to look.
5. What do the satellite clues say? Satellites do not see the metal. They map the altered rock around it: iron-oxide staining, clay and mica minerals, and fault lines. Copper porphyry and gold systems both leave such halos, so a map is a way to rank ground for field work, not proof of a deposit.

For gold-specific field methods, see our guide to mining prospecting for gold. The video below explains how satellite imagery helps in gold exploration.

Farmonaut maps licence areas from satellite data for consultants and licence holders, and results are exploration targets that sit ahead of any resource estimate. You can send a boundary through the mining query form, read about satellite-based mineral detection, or use Contact Us to ask a question.

▶ Explains that satellites cannot see gold itself but map the iron-oxide, clay and fault clues around it. · 4:25

What investors compare

This page does not pick a winner. It lists the facts investors usually compare, using the numbers above.

• Revenue driver. A gold miner’s revenue follows the gold price. A copper miner’s revenue follows the copper price and treatment charges, and often includes gold and molybdenum credits.
• Cost sensitivity. At Barrick, copper’s AISC took about 68% of the realized price in 2025 and gold’s about 47% (our calculation). A given percentage fall in price therefore cuts copper margins faster.
• Capital intensity. Large copper expansions cost billions of dollars and take years, as Freeport’s Bagdad estimate shows.
• Demand source. Gold demand is dominated by investment and central banks; copper demand by construction and electrical use.
• Supply concentration. Three countries mined about 49% of world copper and about 29% of world gold in 2025 (USGS estimates).
• Mine life. Check each mine’s reserve life, grade trend and reserve price assumptions in its latest technical report.

Check each company’s filings on SEDAR+, SEC EDGAR or the ASX before relying on any figure. Many gold producers also mine copper and the reverse, so the label on a company can mislead.

We cover a connected topic in Gold and Copper Concentrate: Grades, Payables, Charges.

For a closer look at a related question, see our guide: Iron Ore vs Gold Mining: Grades, Costs and Output.

Frequently asked questions

Is gold or copper mining more profitable?

In Barrick’s 2025 figures, gold’s all-in sustaining cost was about 47% of its realized price and copper’s about 68%, so the gold operations kept a larger share of each sales dollar that year. One company in one year is not an industry average.

Which metal has the higher ore grade?

Copper grades are far higher in percent terms, but gold is far more valuable per gram. Barrick’s reserves average 0.98 g/t gold and 0.46% copper. That is roughly one gram of gold in a tonne of rock versus about 4.6 kilograms of copper.

How much ore is needed to make one ounce of gold?

At 0.98 g/t, about 32 tonnes of ore holds one troy ounce (31.1035 grams) before recovery losses. At a recovery of 90%, it is about 35 tonnes. Mines with grades of 10 g/t or more need much less.

Why is copper called a byproduct of gold, or gold of copper?

It depends on value. Newmont treats a metal as a co-product when it is more than 10% to 20% of life-of-mine sales value. Lower-value metals are byproducts, and their sales are credited against the main metal’s cost.

Which countries mine the most gold and copper?

For copper in 2025, the USGS estimates Chile first at 5,300 thousand tonnes, then Congo (Kinshasa) and Peru. For gold, China leads at about 380 tonnes, followed by Russia at 310 and Australia at 280. All 2025 figures are USGS estimates.

Do gold and copper mines use the same equipment?

Much of it is the same: drills, shovels, trucks, crushers and grinding mills. The chemistry differs. Gold plants use cyanide leaching and carbon, while copper plants use flotation and smelting, or acid leaching and electrowinning.

Why does copper need more capital than gold?

Copper ore grades are low, so mines must process very large tonnages in big concentrators, with power, water and transport to match. Freeport’s filing estimates about US$3.5 billion to add 200 to 250 million pounds of annual capacity at Bagdad.

How do tailings compare between the two?

Copper produces more tailings per unit of metal because its ore is lower grade. Both industries follow the same ICMM tailings standard where companies are members. Gold tailings may also hold cyanide residues that need treatment.

Can satellites tell gold from copper?

Not directly. Satellites map surface minerals such as iron oxides and clays, which show the alteration around both gold and copper systems. A field visit and samples are still needed to tell which metal is present and at what grade.

Where can I check live gold and copper prices?

The LBMA publishes gold prices, and the London Metal Exchange and COMEX publish copper prices. Cochilco, the Chilean copper commission, publishes daily and monthly copper figures. Always use a dated price and note which exchange it comes from.

How do I decide between a gold and a copper licence?

Start with the deposit model for the area, then check scale, processing options and licence rules. A satellite screen can rank targets, and a geologist should confirm them on the ground.