Budgeting E&S CAPEX: methodology for internationally financed projects

In the financial structure of an infrastructure project, environmental and social costs rarely appear as a consolidated chapter. They are distributed across studies, equipment, provisions, operational monitoring, training and compensation. This dispersion has two recurring consequences: an overall underestimation of the budget actually required, and budgetary fragility when cost trade-offs occur during the execution phase.

The IFC Performance Standards (paragraph 22 of PS1 on dedicated resources) and equivalent frameworks establish the requirement that the project has adequate resources for E&S implementation. This requirement is not quantified, because the amount depends on context, but it imposes a documented demonstration that the allocated budget is proportionate to the project's risks.

This article presents a budgeting methodology that consolidates E&S costs into seven guiding lines, covering the complete project life cycle from the studies phase to closure. This methodology is adaptable to the project's size and complexity, but the structuring framework remains constant.

The seven E&S budget lines

A comprehensive E&S budget covers seven cost categories, each corresponding to a phase or activity family.

First line, preliminary studies. It includes the ESIA, possible complementary studies (in-depth biodiversity, field socio-economic, climate analysis, land studies), public consultations and their logistics. For a Category A project, this line typically represents a significant share of the project's total study costs.

Second line, compensation and resettlement. When the project is concerned, RAP costs are often underestimated during the studies phase. They include monetary compensation, construction of resettlement housing, replacement land, livelihood restoration support, post-displacement monitoring for three to five years. This line can be very heavy on linear projects (roads, lines, canals) crossing inhabited areas.

Third line, physical mitigation measures. Equipment and installations to reduce impacts: stormwater treatment devices, noise barriers, wildlife crossings, filters on industrial facility chimneys, track watering systems. These measures are directly referenced in the ESMP and are CAPEX in the conventional sense.

Fourth line, organisational capacity. Costs of the internal E&S team mobilised during construction and the early years of operation: salaries, charges, equipment, travel. For a large-scale infrastructure project, a properly dimensioned E&S team comprises a senior manager, several specialised officers (environment, social, health-safety, communities), a monitoring-reporting function.

Fifth line, training. Training of personnel and subcontractors, continuous training, community awareness-raising. This line is often underestimated but it conditions the effectiveness of all the others. It also covers production costs of materials (manuals, videos, translations).

Sixth line, stakeholder consultation and engagement. Public meetings, individual consultations, grievance redress mechanism, external communication, information materials. On a Category A project in a sensitive territory, this line can reach substantial amounts, particularly in the first months of mobilisation.

Seventh line, monitoring and audit. Measurement campaigns (noise, air, water), periodic internal audits, independent external audits, counter-expertise, ad hoc support. This line unfolds over the entire project duration, with variable intensity according to phases.

To these seven lines are added, for certain projects, specific provisions (major climate risks, biodiversity offsets in critical habitats, associated community development programmes) which can be budgeted separately or integrated into the main lines.

Typical distribution by phase

The distribution of E&S costs over the project duration follows a characteristic curve.

In the studies phase (pre-investment decision), costs are concentrated on line 1 (studies) and a share of line 6 (initial consultation). They generally represent a few per cent of the project's CAPEX, more on high-risk projects.

In the construction phase (2 to 5 years depending on projects), costs are distributed across all lines, with a peak on lines 2 (compensation and resettlement, when the project is concerned), 3 (physical mitigation measures), 4 (E&S team on site) and 5 (training). This phase concentrates the majority of the total E&S budget.

In the early operation phase (first 3 to 5 years), costs are maintained on lines 4 (permanent team dimensioned differently than in construction), 5 (continuous training), 6 (ongoing stakeholder engagement) and 7 (regular monitoring). Post-displacement monitoring (line 2) continues for several years.

In the mature operation phase, costs stabilise at a lower level, centred on regular monitoring, maintaining the reduced team, periodic audits.

In the closure or decommissioning phase, specific costs return: site restoration, demolition waste management, post-closure monitoring. On certain projects (mines, industrial installations), these costs are anticipated from start-up in the form of ring-fenced financial provisions.

Dimensioning methodologies

Dimensioning the seven lines for a specific project mobilises three approaches, ideally combined.

Benchmarking. Comparing the project to similar operations already completed, in comparable contexts, to estimate reasonable ranges. Specialised consultancies and E&S teams of large firms generally have this market knowledge. DFIs also publish case studies that can inform benchmarks.

Analytical calculation. For each line, building the cost from unit elements: number of measurement campaigns times unit cost, person-months of E&S team times average cost, number of households to resettle times average cost per household. This approach requires time and data, but it produces the most precise dimensioning.

Validation through lender dialogue. The E&S teams of lenders have, through projects appraised, a good view of expected orders of magnitude by project type and region. An informal conversation upfront can help calibrate orders of magnitude, and avoid a significant gap with expectations at the time of formal due diligence.

The three approaches combined produce a credible E&S budget, defensible during appraisal, and realistic in execution.

The most frequent budgeting errors

Five errors recur in inadequately prepared E&S budgets.

Treating studies as a one-off cost. E&S studies are often budgeted only once, at start-up. Reality imposes complementary studies throughout the project: updating after route modifications, missing seasonal studies, ad hoc expertise. A provision for complementary studies (typically 20 to 30% of the initial studies budget) protects against this drift.

Forgetting external consultation costs. Public meetings, team travel to communities, multilingual materials, accommodation during long missions, represent costs often not quantified in the studies phase. They then appear as surprises.

Underestimating post-displacement monitoring. RAP budgets often include compensation and housing construction, but under-dimension monitoring over the following three to five years. Yet it is during this period that livelihood restoration difficulties emerge.

Budgeting the E&S team as a percentage of CAPEX. This approach, sometimes used as a shortcut, produces teams too weak on high-risk projects and too heavy on moderate-risk projects. Dimensioning must start from tasks to be covered, not from a ratio.

Absence of contingency provision. An infrastructure project encounters contingencies that affect the E&S budget: route modifications, late discovery of a sensitivity, incident requiring specific management, regulatory evolution. A provision of 10 to 15% of the initial E&S budget, distinct from the project's general contingencies, absorbs these contingencies without compromising function.

Seriously budgeting the E&S costs of an infrastructure project is an initial investment that pays off over the entire project duration. A well-constructed budget protects the quality of the E&S function against late trade-offs, reassures lenders during due diligence, and avoids surprises that transform a technical non-compliance into a financial crisis.

The methodology to retain is simple: seven structuring lines, analytical dimensioning combined with benchmarking, dedicated contingency provision, formal ring-fencing. Applied with discipline from the studies phase, it produces budgets that hold and that allow the E&S function to play its role fully.