Mine finance is the set of equity, debt and hybrid instruments that carry a mineral project from a licence to a producing operation. No single source funds the whole journey. Exploration is paid for with high-risk equity. Studies are funded by larger equity raises, strategic partners or royalties. Construction usually needs a structured package of project debt, equity, streams and offtake finance, all resting on a bankable feasibility study and a financial model that lenders trust.

Try it: Project debt capacity from DSCR →

Founders, CFOs and project teams in Australia, Canada, Kenya, Tanzania and elsewhere who need funding for mining projects face the same ladder. We go through it stage by stage, explain how mining project finance is structured and modelled, and set out what lenders look for. We also show where satellite mineral detection reduces the cost of the earliest and most expensive-to-fund stage. Readers coming at this as investors rather than borrowers may want our overview of gold mining investment routes and the checks to run first.

“The Equator Principles apply to project finance where total project capital costs are US$10 million or more.”

The mine finance ladder: what funds each stage

The cost of capital falls as risk falls. At the start, only investors willing to lose everything will fund a project, and they want a large share for it. By construction, lenders will provide debt at a fraction of the cost of equity, because the deposit, the mine plan and the economics have been proven. Good planning means raising the right kind of money at each step, and no more of the expensive kind than you need.

Equity: the foundation of funding for mining projects

Equity is money invested in exchange for ownership, and it pays for almost all early work. There are no repayments, but every share issued dilutes existing holders. The common forms:

• Private placements: shares, often with warrants, sold to a small group of investors. The workhorse of junior mine finance.
• Public listings and follow-on offerings: raising from the market on exchanges with large mining sectors, under that market’s listing rules and reporting code.
• ✔ Flow-through shares (Canada): companies renounce 100% of eligible Canadian Exploration Expenses to investors, who may also claim the 15% federal Mineral Exploration Tax Credit, or 30% for eligible critical minerals. This lowers the effective cost of exploration equity.
• Strategic equity: a larger miner takes a stake, often with rights to more of the project later.
• Private equity and resource funds: larger cheques at the development stage, usually with board seats and tighter terms. Our guide to how mining private equity and VC funds pick projects explains what they ask for.

Flow-through is worth a closer look because the numbers are unusually concrete. According to the AME members’ guide to Canadian Exploration Expenses (2025 update), the investor deducts the renounced expenses and also gets a federal credit of 15 cents per dollar of eligible spend, or 30 cents for eligible critical minerals. Provinces may add their own credits. Ottawa has extended and adjusted these credits in past budgets, so check the Canada Revenue Agency’s pages for the rates in force before you price a raise.

Early equity has become harder to raise. S&P Global reported that junior exploration budgets fell 13% to US$4.39 billion in 2025, and grassroots exploration fell to a record-low share of global budgets, even as gold budgets rose. For juniors, that makes cheap, fast ways of proving up targets worth more than they were, and it makes knowing where to meet mining investors and what they check worth more too.

If you are planning an exploration raise, you can cut how much equity the first phase needs. Draw your licence on mining.farmonaut.com: Map Your Mining Site, or request a quote through our mining query form, and focus the programme on the best ground from day one.

Debt, royalties, streams and offtake: mine finance for development

Once a project has a feasibility study and permits in sight, cheaper and non-dilutive money appears. A typical construction package combines several of the sources below, and each has a different claim on the project’s cash flow.

Project finance debt

In mining project finance, lenders lend to a project company (often a special-purpose vehicle) and are repaid mainly from the mine’s own cash flow, secured over its assets and contracts. They need a bankable feasibility study, permits, an environmental and social impact assessment, construction contracts and usually offtake agreements. Many banks and export credit agencies apply the Equator Principles to project finance where total project capital costs are US$10 million or more, and to project-related corporate loans of at least US$50 million with a tenor of two years or more. In practice that means meeting the IFC’s eight Performance Standards on environmental and social sustainability.

How big can the loan be? Lenders start from the cash flow, not from the capital bill. They take the cash flow available for debt service (CFADS), divide by the minimum debt service coverage ratio they will accept, and work out what loan that annual payment can repay over the tenor. Whatever the loan doesn’t cover has to come from equity, streams, royalties or subordinated debt. The calculator shows the mechanics.

Push the DSCR from 1.5 to 1.8, or cut the tenor by two years, and watch the equity gap grow. That is why grade and cost matter so much to the financing: a higher-margin mine carries more cheap debt, and a marginal one leans on dearer capital.

Royalties and streams

A royalty holder pays cash upfront for a percentage of the mine’s future revenue or production, such as a net smelter return (NSR) royalty. A streamer pays an upfront deposit for the right to buy a share of the mine’s metal at a fixed, low price per ounce or tonne. Neither dilutes equity or needs repaying like a loan, but both take a permanent slice of the project’s economics. They often sit alongside debt in gold mine finance packages.

Offtake and prepayment finance

Commodity traders and end users sometimes prepay for future production, or lend against an offtake agreement. It can be an efficient source of mine finance for base metals and concentrates. The offtake terms, including pricing and penalties, need careful review.

Government and development finance

Development finance institutions and export credit agencies can lend where commercial banks won’t, or lend for longer. Some governments run dedicated programmes. Export Finance Australia manages the Australian Government’s A$5 billion Critical Minerals Facility and, as of April 2026, supports delivery of a separate A$1.2 billion Critical Minerals Strategic Reserve. Its stated criteria include a completed feasibility study, a buyer commitment for the production and proven processing technology.

The facility grew in steps. It was set up in 2021 with A$2 billion and expanded by a further A$2 billion in October 2023, according to the IEA policy database, before reaching the A$5 billion that Export Finance Australia listed when we checked in September 2026. Programmes like this complement commercial lenders rather than replace them. Other countries run their own schemes, so check which agencies are active in your jurisdiction and in the countries supplying your equipment, because export credit is often tied to where equipment is bought.

DFI participation also helps in higher-risk jurisdictions. Commercial lenders are often more comfortable lending alongside a development finance institution, and political-risk insurance can cover some risks that commercial banks will not take on alone.

Mezzanine, convertibles and bridge loans

Mezzanine debt and convertible notes sit between senior debt and equity: more expensive than bank debt, less dilutive than shares. Bridge loans fund a gap, often between feasibility and the main financing close. Under the Equator Principles, bridge loans of less than two years that are meant to be refinanced by project finance fall within scope too.

Mining project finance modelling in 7 steps

Every funder will ask for the model. It converts geology, engineering and market assumptions into cash flows, and shows lenders and investors how their money is repaid under different scenarios. A typical project model is built in seven linked steps, and a good mine finance model keeps them on separate, clearly labelled sheets.

Step 1: project scope and resource definition

Start with the orebody: tonnes, grade, geometry and the mine plan that will extract it. Inputs come from the resource estimate, reported under a recognised code such as JORC, NI 43-101, SAMREC or S-K 1300 (all aligned under the CRIRSCO template) and signed by a Competent or Qualified Person. Errors here flow through every other step.

Step 2: capital and operating cost estimates

Estimate initial capital (mine, plant, infrastructure, owner’s costs and contingency), sustaining capital and operating costs per tonne. For gold, compare the result with all-in sustaining cost (AISC), the industry metric defined in World Gold Council guidance as operating costs plus sustaining capital.

Step 3: processing and recovery

Model throughput, head grade, metallurgical recovery and ramp-up. Recovery assumptions should come from test work, not analogues.

Step 4: financing structure

Lay out the mix of equity, senior debt, subordinated debt, royalties and streams, with drawdown schedules, interest, fees and repayment profiles. Most project debt is held in a project company so that lenders’ recourse is limited to the project. The order in which cash is paid out is fixed in the financing agreements, and it looks roughly like this.

Step 5: revenue and offtake

Apply price decks, payable terms, treatment and refining charges, and royalty and stream deductions. Lenders usually run the model on conservative price assumptions, not spot prices.

Step 6: sensitivity and scenario analysis

Test the model against lower prices, lower grade, lower recovery, higher costs, construction delays and currency moves. The result shows which variables the project is most exposed to, and it is often price and grade.

Step 7: outputs and covenants

Report net present value (NPV), internal rate of return (IRR), payback, peak funding need, and lender ratios such as the debt service coverage ratio (DSCR) and loan life coverage ratio (LLCR). Lenders set covenants on these ratios, and the model must show headroom under downside cases.

“Australia’s Critical Minerals Facility, managed by Export Finance Australia, was listed at A$5 billion when checked in September 2026.”

Structuring a mine finance package: capital structure, tax and currency

Knowing the sources is half the job. The other half is combining them so the project can carry the package through construction, ramp-up and a weak price cycle. Construction-stage packages are usually negotiated over many months, and each funder’s terms affect the others. A few structural questions come up in almost every deal.

How much debt can the project carry?

Debt capacity is set by cash flow, not by the size of the capital bill, as the calculator above shows. Lenders size the loan so the DSCR stays above their minimum in the base case, with headroom in downside cases, and so the loan is repaid well before reserves run out. The rest must come from equity, streams, royalties or other subordinated sources. A high-grade, low-cost project can carry more debt; a marginal one relies more on equity.

Completion tests and cost-overrun protection

Lenders usually take construction risk only with protection. Sponsors may be asked to guarantee the debt until the mine passes a completion test, for example producing at a set rate, recovery and cost for a defined period. Cost-overrun facilities or standby equity commitments cover budget blowouts. These terms matter as much as the interest rate.

Tax, royalties and the fiscal regime

The model must reflect the host country’s royalty rates, corporate tax, capital allowances, withholding taxes and any state participation or local-ownership rules. Fiscal stability agreements, where available, can protect the project from later changes, and lenders value them. Take local tax advice: small differences in how capital is depreciated can move the NPV a long way.

Currency and commodity price risk

Most mines sell in US dollars but pay many costs in local currency. The model needs realistic exchange-rate assumptions and sensitivities. Some lenders require partial price hedging during the loan period to protect debt service. Hedging protects lenders but limits upside for equity, so the balance is a negotiation, not a formula.

Four mistakes turn up again and again:

• Over-gearing: taking the maximum debt offered, then having no room when ramp-up is slower than planned.
• Stacking royalties and streams: each one looks affordable alone, but together they can leave too little margin for debt and equity.
• Optimistic ramp-up: assuming nameplate throughput and recovery from month one.
• ⚠ Ignoring working capital: first sales may come months after first production, so the package must fund that gap.

What lenders check before committing mine finance

Lenders and large investors run a structured due-diligence process, usually with independent technical, legal, insurance and environmental advisers. The questions are predictable, and answering them early shortens the path to financial close.

• ✔ Resource and reserve quality: is the resource code-compliant, and has enough of it been converted to reserves to cover the loan life with a margin (the “reserve tail”)?
• ✔ Feasibility study: is it bankable, with costs estimated to the accuracy lenders need, and has an independent engineer reviewed it?
• Permits and title: are the mining right and the key permits granted, or on a clear path? Title is checked on the official cadastre.
• 📊 Environmental and social: does the project meet the Equator Principles and IFC Performance Standards, including community, water, biodiversity and resettlement issues?
• Construction risk: who builds it, under what contract, and with what guarantees?
• Sponsor strength: can the sponsor fund cost overruns, and has it built mines before?
• ⚠ Jurisdiction: royalty and tax stability, currency controls and political risk, sometimes covered by insurance or DFI participation.

Funding for gold mining projects: specific points

Funding for gold mining projects follows the same ladder, with a few gold-specific features. Gold is sold into deep, liquid markets, so offtake is rarely the hard part. Gold mine finance instead leans on streams and royalties, because many royalty and streaming companies specialise in precious metals. Gold loans (repaid in ounces) and gold hedging are sometimes used alongside senior debt, though hedging can cap the upside equity holders expect.

Cost discipline is central. Lenders and investors compare a gold project’s expected AISC with the industry, because margin, not just ounces, decides how much debt the project can carry. And with an S&P Global study finding an average of 15.7 years from discovery to production across 127 mines, gold projects need a financing plan that survives several gold price cycles.

How satellite exploration lowers the cost of early mine finance

The first rung of the ladder is the hardest to fund and the most dilutive. Traditional early exploration (ground surveys, trenching, geochemical sampling and drilling) is slow and expensive. Our satellite-based mineral detection moves the first screen from the ground to space. We analyse multispectral and hyperspectral imagery for the spectral signatures of minerals and alteration, and flag likely mineralised zones, alteration halos and structures before field teams deploy.

• ✔ Lower cost: up to 80–85% lower early-exploration cost, so each dollar of exploration equity goes further.
• ✔ Faster: timelines reduced from months to days, with reports delivered in 5–20 business days.
• Deliverables: high-potential zones, prospectivity heatmaps, estimated location and depth ranges, geological interpretation, and PDF plus georeferenced GIS files.
• Premium+: TargetMax™ Drilling Intelligence adds drilling-angle recommendations and interactive 3D subsurface models, to make first drilling more efficient.
• ⚠ Limits: satellite targets are exploration targets. They guide where to sample and drill; they are not a resource and cannot underpin debt on their own.

See a typical deliverable in our satellite-driven 3D mineral prospectivity mapping overview. We have scanned 100,000+ hectares for 20+ mineral types across 25+ countries.

A practical mine finance roadmap

1. Secure clean title and check it on the official cadastre; our mining cadastre portal guide by country lists where.
2. Screen the ground cheaply first with satellite analysis, so the first equity raise funds only the strongest targets.
3. Raise exploration equity in tranches tied to milestones: targets confirmed, first drilling, maiden resource.
4. Bring in a strategic or royalty partner when a code-compliant resource makes the project easier to value.
5. Fund studies in sequence (scoping, pre-feasibility, feasibility), building the financial model as you go.
6. Engage lenders early, before the feasibility study is finished, so it is built to the standard they need, including the Equator Principles and IFC Performance Standards.
7. Negotiate the construction package as a whole, testing every term in the downside cases of your model.

Each step makes the next one cheaper. Skipping one usually means paying for it later, in dilution or in a failed financing.

Frequently asked questions

Reviewed September 2026 against the Equator Principles scope page, the IFC Performance Standards, Export Finance Australia’s critical minerals page and the IEA policy record of the Critical Minerals Facility, the AME guide to Canadian Exploration Expenses, the World Gold Council’s AISC guidance, S&P Global’s lead-time and exploration-budget research, and the CRIRSCO reporting-code literature.

This article is general information about how mining projects are financed. It is not financial, legal, tax or investment advice, and it does not recommend any lender, fund, instrument or security. The calculator is illustrative arithmetic on your own inputs. Programme sizes, thresholds and tax rules come from official sources and change, so confirm before relying on them. Satellite results are exploration targets, not Mineral Resources or Reserves.