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Junior exploration companies carry the highest risk in the mining industry. They have no production revenue, they depend on equity raised from investors, and the odds that any single project becomes a mine are low. In this environment, disciplined budgeting is not just good accounting. It decides whether a company can test its best targets properly before its money runs out.
This article explains how exploration costs are structured, gives indicative unit rates, walks through an illustrative first-year budget, and highlights the mistakes that most often damage junior programmes. All numbers are indicative only. Actual prices vary with location, contractor availability, commodity, season and market conditions, so always obtain current quotations.
How Exploration Spending Is Distributed
Costs rise with each stage, and the largest share is almost always drilling. A typical junior programme might allocate roughly as follows, although this varies by project.
| Cost category | Typical share of a programme |
|---|---|
| Drilling (contractor, supervision, sampling) | 40 to 60 percent |
| Laboratory analysis | 8 to 15 percent |
| Geophysical and geochemical surveys | 10 to 20 percent |
| Geological staff and consultants | 8 to 15 percent |
| Camp, logistics and field support | 5 to 10 percent |
| Licences, legal, environmental and community | 5 to 10 percent |
| Corporate overhead | 10 to 15 percent of the total |
Understanding this distribution highlights an important principle: money spent on mapping, geochemistry and geophysics before drilling is generally cheap insurance against drilling expensive holes in the wrong place.
Indicative Unit Costs
The following ranges are rough guides for African exploration conditions and will change over time and by jurisdiction.
| Activity | Indicative range (US dollars) |
|---|---|
| Soil sample, all-in including assay | 25 to 60 per sample |
| Rock chip sample with assay | 30 to 80 per sample |
| Ground magnetic survey | 80 to 200 per line-kilometre |
| Induced polarisation survey | 1,500 to 3,500 per line-kilometre |
| Airborne magnetic and radiometric survey | 30 to 70 per line-kilometre |
| Trenching with backhoe or by hand, including sampling | 15 to 60 per metre of trench |
| Reverse circulation drilling, all-in | 70 to 130 per metre |
| Diamond core drilling, all-in | 150 to 300 or more per metre |
| Geologist day rate, senior consultant | Varies widely, from several hundred dollars per day |
Drilling costs depend on depth, rock hardness, water availability, access, the number of holes and the distance to the drilling company’s base. Mobilisation and demobilisation of a rig can add a significant fixed cost, which is why programmes with few holes can have a high cost per metre. Remote sites with poor roads or seasonal flooding will cost more.
Costs Specific to Kenya
Kenya adds several categories that explorers should include.
- Licence-related costs. Application fees, annual rents or charges where applicable, and legal support. Fee schedules are set in regulations and can be amended, so confirm current amounts.
- Environmental approvals. Exploration that disturbs land may need environmental assessments or approvals appropriate to the scale.
- Land access and compensation. Agreements with landowners and communities, compensation for crop damage and sometimes the cost of access roads.
- Community liaison. Local liaison officers, meetings and benefit-sharing initiatives.
- Local content. Use of Kenyan goods, services and labour is encouraged by law and can influence procurement.
- Security and logistics. Depending on location, secure storage for core and samples, vehicle hire and fuel.
- Reporting and compliance. Technical reports to the regulator and keeping data in prescribed formats.
An Illustrative First-Year Budget
The following example shows how a junior might budget a first-year programme on a prospecting licence in a greenstone gold setting. It is a simplified illustration, not a recommendation for any specific project.
| Item | Assumption | Indicative cost (US dollars) |
|---|---|---|
| Licence, legal and administration | Fees and legal support | 30,000 |
| Desk study and remote sensing | Data compilation and interpretation | 15,000 |
| Geological mapping and rock sampling | Field team for several weeks | 60,000 |
| Soil geochemistry | 3,000 samples at about 45 each | 135,000 |
| Ground geophysics | Magnetics and induced polarisation over priority areas | 100,000 |
| Trenching | Selected anomalies | 40,000 |
| Community liaison and environmental baseline | Programme-long | 40,000 |
| Subtotal before drilling | 420,000 | |
| Reverse circulation drilling | 1,500 metres at about 95 per metre | 142,500 |
| Subtotal | 562,500 | |
| Corporate overhead | About 12 percent | 67,500 |
| Contingency | About 10 percent of the combined total | 63,000 |
| Indicative total | About 693,000 |
Notice that nearly three quarters of the field spending in this example goes into low-cost surface work and only about a quarter into drilling. If surface work fails to identify convincing targets, the company can decide not to drill and conserve cash.
Principles for Good Budgeting
Budget in stages with decision gates. Divide the programme into phases, each with specific objectives and a defined budget. Do not commit the whole sum before early results are known. Write down in advance what results would justify the next phase and what would lead to stopping.
Match the programme to your cash. A programme that spends 90 percent of the company’s cash on the first drill campaign leaves no room to follow up success. Keep reserves for follow-up drilling, resource work and unexpected costs.
Include contingency. Weather, access problems, equipment breakdowns and permit delays are normal. A contingency of ten to twenty percent is common, with higher values for remote or high-uncertainty projects.
Account for the whole cost of a sample. A drill metre is not just the contractor’s rate. It also costs geologist time, core handling, sampling, assays, quality control, transport and data management. Many budgets underestimate these.
Remember time-related costs. Delays raise costs because staff, camps and vehicles are paid for even when work is not progressing. Seasonal rains in East Africa can halt drilling for weeks.
Plan for quality assurance. QA/QC samples add perhaps ten to fifteen percent to assay costs, and are necessary for data that can support resource estimates and investor confidence.
Budget for data and reporting. Database management, mapping, modelling and technical reports are real costs. They are also what turns fieldwork into a saleable asset.
Cost-Saving Strategies That Do Not Compromise Quality
Several approaches reduce cost without damaging results.
- Use existing data first. Public geological and geophysical datasets, historic reports and satellite imagery cost little relative to new surveys.
- Start with low-cost methods. Soil sampling, mapping and trenching can eliminate poor ground cheaply.
- Design drill holes carefully. Structural interpretation and 3D modelling reduce the number of holes needed.
- Use RC drilling for first-pass testing and reserve diamond drilling for holes that need geotechnical, structural or metallurgical information.
- Negotiate contracts sensibly. Competitive tendering, clear scopes, fixed rates for defined work and realistic mobilisation terms can save substantial amounts.
- Share costs. Joint ventures, farm-in agreements or sharing camps and equipment with neighbouring projects reduce individual expenditure.
- Train and employ local staff where appropriate, which supports local content goals and can reduce labour and logistics costs.
False economies, such as using unqualified staff, skipping QA/QC or choosing the cheapest drilling contractor regardless of reputation, tend to cost far more later.
Common Budgeting Mistakes
Typical errors include underestimating the cost of reaching depth, ignoring licence renewal and relinquishment effects on future spending, forgetting community and environmental costs, failing to include assay turnaround delays, setting an overly ambitious programme for the money available and promising investors specific discovery timelines that no geologist can guarantee. A further mistake is treating the budget as fixed after the first assay results arrive. A good budget is reviewed regularly and revised in light of data.
Funding and Investor Expectations
Investors in junior exploration expect clear programmes, realistic budgets, technical credibility and regular updates. They typically want to know what the money will be spent on, what milestones it will achieve and what the next funding requirement will be. Presenting a staged budget, with explicit decision points and a rationale for each activity, builds trust. Many juniors raise funds in tranches linked to milestones, which aligns spending with progress.
Conclusion
Budgeting for mineral exploration is about allocating scarce capital to the activities most likely to create value. For juniors, the best approach is to spend a modest amount on low-cost, high-information work to rank targets, reserve the largest share of funds for drilling the best targets, include realistic contingency and community and compliance costs, and review the budget at every decision gate. With indicative unit rates as a guide and current quotations for real planning, a well-structured budget will help a junior explorer stretch its resources and give its projects the best chance of success.
