AFE stands for Authorization for Expenditure, a document used across the oil and gas industry to estimate the costs of a proposed operation before work begins. Think of it as a detailed budget proposal that an operator prepares and sends to all the other companies or individuals who own a share of a well. It serves two purposes at once: it’s a cost estimate and a formal request for partners to approve spending and commit their share of the money.
What an AFE Covers
An AFE is prepared for any significant well operation, whether that’s drilling a new well, completing it for production, reworking an existing well, installing equipment, or plugging and abandoning one that’s no longer producing. The document breaks down every anticipated cost line by line so that all parties can see exactly where the money is expected to go.
One important detail in how costs are categorized: an AFE typically separates expenses into tangible and intangible categories. Tangible costs cover physical equipment like casing, tubing, and wellhead components, things that have salvage value. Intangible costs cover services and consumables like labor, fuel, drilling mud, and cement, things that are used up during the operation with nothing physical left over. This distinction matters because the two categories are taxed differently under the Internal Revenue Code, making the AFE a useful document for both budgeting and tax planning.
How AFEs Work in Joint Ventures
Most oil and gas wells are owned by multiple parties. One company acts as the operator, meaning it runs the day-to-day work, while the other owners (called non-operators) hold a financial stake but don’t manage operations directly. The AFE is the formal mechanism for keeping everyone on the same page about costs and commitments.
When an operator wants to drill or perform a major operation, it prepares the AFE and sends it to every non-operator. Each non-operator then decides whether to participate. If they agree, they’re typically expected to send a prepayment of their proportionate share of the estimated costs along with their election to join. Under the widely used AAPL Model Form Joint Operating Agreement, if the operator secures written consent from parties owning at least 51% of the participating interests within 30 days, all parties entitled to participate become bound by the proposal. They’re obligated to pay their proportionate share whether or not they individually consented.
Joint operating agreements also set thresholds for when AFEs must be shared. In one common provision, if an operator prepares an AFE for its own internal use, it must provide an information copy to any non-operator who requests one for any single project costing more than $25,000. This keeps non-operators informed even on projects that don’t require a formal vote.
AFE vs. Actual Costs
An AFE is an estimate, not a final invoice. Actual costs almost always differ from the original projection because field conditions are unpredictable. A well might hit unexpected formations that require extra drilling days, or equipment costs might come in under budget. The real expenses show up later when invoices are processed and charged to the well’s cost accounts.
Because of this gap between estimated and actual spending, operators reconcile AFE budgets against real costs throughout and after the operation. Modern accounting systems let partners compare approved capital expenditures with actual charges in near real time, so everyone can see whether a project is tracking close to the original estimate or running over. Significant overruns typically require the operator to explain the variance and, in some cases, seek additional approval from partners.
Why AFEs Matter Beyond Budgeting
The AFE isn’t just a spreadsheet. It’s a decision-making tool with legal and financial consequences. For non-operators, reviewing an AFE is the moment they decide whether to invest more capital in a well or decline participation (and potentially face non-consent penalties under the operating agreement). For operators, the AFE sets a baseline of accountability. If actual costs balloon far beyond the approved estimate without good reason, it can strain relationships with partners or even trigger disputes.
AFEs also feed into broader capital planning. Companies with dozens or hundreds of wells use AFE data to forecast total capital spending for the quarter or year, allocate budgets across different basins or plays, and report anticipated costs to investors. At tax time, the tangible and intangible cost breakdowns from AFEs help determine which expenses can be deducted immediately and which must be depreciated over time, directly affecting a company’s tax liability.
For anyone working in oil and gas finance, land management, or operations, the AFE is one of the most common documents you’ll encounter. It sits at the intersection of engineering estimates, partnership governance, and accounting, making it a foundational piece of how the industry funds and manages well operations.