A typical onshore oil well in the United States costs between $5 million and $10 million to drill and complete, according to the Department of the Interior. Offshore wells cost dramatically more, averaging $67 million to $91 million per well depending on depth and purpose. But drilling is only one piece of the total price tag. The full lifecycle of an oil well includes leasing, permitting, daily rig costs, hydraulic fracturing, ongoing maintenance, and eventual plugging and site restoration.
Onshore Wells: $5 Million to $10 Million
Most oil wells drilled in the U.S. today are onshore, and most use hydraulic fracturing to unlock oil trapped in tight rock formations. The total development cost for a typical hydraulically fractured onshore well falls between $5 million and $10 million. That figure covers everything from drilling the initial hole to completing the well so it can produce oil.
Where exactly you land in that range depends on several factors: how deep the well goes, the geology of the formation, how many stages of fracturing are needed, and where the well is located. A shallow vertical well in a conventional reservoir might come in well under $5 million, while a long horizontal well in the Permian Basin with dozens of frac stages can push past $10 million. Horizontal wells, which drill down and then turn sideways through the producing formation, are more expensive than vertical wells but typically recover far more oil.
Offshore Wells: $68 Million to $91 Million
Offshore drilling operates on an entirely different cost scale. A comprehensive review of wells drilled off Newfoundland’s coast from 1998 to 2019 found that exploration wells averaged $90.9 million each, while development producer wells averaged $91.1 million. Injector wells, which pump water or gas into a reservoir to maintain pressure, averaged $68.8 million per well.
Looking across a longer historical window from 1966 to 2018, the average offshore well cost was $67.7 million, with drilling costs running about $14,235 per meter of depth. These figures reflect deepwater operations using mobile offshore drilling units. Shallow-water wells drilled from fixed platforms cost less, but deepwater and ultra-deepwater projects are where most new offshore investment goes today.
The equipment alone explains much of this gap. A new land-based drilling rig costs $10 million to $25 million. An offshore drilling rig starts at around $500 million. Drillships designed for ultra-deepwater work now cost over $1 billion to build.
Rig Day Rates: $28,500 to $35,000 Onshore
Drilling rigs are typically rented rather than purchased, and their daily rates make up a major share of well costs. In 2025, high-specification land rigs in the U.S. logged day rates between $28,500 and $35,000. Helmerich & Payne signed a three-year contract with ExxonMobil for 25 rigs in the Delaware Basin at $30,000 per day plus performance bonuses.
Technology drives pricing. Rigs equipped with automation systems and cleaner-burning engines command a $3,000 to $5,000 daily premium over older mechanical rigs. High-horsepower rigs from Nabors achieved $32,000 to $35,000 per day in 2025, a $6,000 to $8,000 uplift over mid-range machines. Since drilling a horizontal well can take two to four weeks, rig rental alone can run $600,000 to $1 million or more before you account for crew, fuel, drilling fluid, and casing.
Leasing, Permitting, and Pre-Drilling Costs
Before any drilling begins, you need the legal right to extract minerals and a permit from regulators. On federal land managed by the Bureau of Land Management, the filing fee for a competitive lease application is $3,175 for fiscal year 2026, and the application for a permit to drill costs $12,850. These are filing fees only. The actual cost of acquiring mineral rights through a lease auction or private negotiation varies enormously by location and can range from a few hundred dollars per acre in unproven areas to tens of thousands per acre in productive basins like the Permian or Eagle Ford.
Lease agreements also include royalty obligations, typically 12.5% to 25% of production revenue, which represent an ongoing cost throughout the well’s life. Seismic surveys to identify promising drilling targets add another layer of pre-drilling expense, often running hundreds of thousands to millions of dollars depending on the area covered.
Hydraulic Fracturing Costs
For wells that require hydraulic fracturing (most new U.S. onshore wells do), the frac job is one of the largest single line items. The Department of the Interior estimates that compliance with federal fracturing regulations adds about $11,400 per operation, which it describes as no more than one-quarter of one percent of total well development cost. That ratio puts the total well cost context at roughly $4.5 million or more just for the frac-related portion of development.
Fracturing costs depend on the number of stages (each stage treats a different section of the horizontal wellbore), the volume of water and sand used, and the complexity of the formation. A well with 30 to 50 frac stages will cost significantly more to complete than one with 10 to 15.
Annual Operating Expenses
Once a well is producing, it still costs money to keep it running. Operating expenses include electricity for pumps, maintenance on surface equipment, chemical treatments, water disposal, and labor for periodic well checks. These costs vary widely based on production volume and well type.
West Virginia’s Tax Division, which tracks operating expenses for property tax purposes, provides a useful benchmark. For conventional oil wells, operating expenses run about 35% of gross oil revenue, capped around $5,750 per year for a typical well. Enhanced recovery wells, which use additional techniques to squeeze more oil from aging reservoirs, can run up to $9,000 annually. Horizontal wells in prolific formations have higher absolute costs but lower costs relative to production: a horizontal Marcellus well, for instance, can have operating expenses up to $175,000 per year for gas production, reflecting both higher output and higher maintenance demands.
These figures represent direct operating costs only. They don’t include taxes, royalty payments, or overhead like office staff and insurance, which add meaningfully to the total cost of keeping a well in production.
Plugging and Abandonment: $20,000 to $76,000
Every oil well eventually stops producing enough to justify its operating costs, and at that point it needs to be properly sealed. The median cost of plugging a well without surface restoration is about $20,000. If you include reclaiming and restoring the land around the wellsite, the median rises to $76,000. Costs vary based on well depth, location, and how long the well sat idle before plugging, with some complex or neglected wells costing several hundred thousand dollars.
State regulators typically require operators to post a bond before drilling to guarantee they can cover plugging costs. The gap between required bonds and actual plugging costs is a persistent issue: many states set bond amounts well below what plugging actually costs, which is how the country has ended up with an estimated millions of orphaned wells that no company is financially responsible for cleaning up.
Total Lifecycle Cost
Adding it all up, a single onshore oil well in the U.S. costs roughly $5 million to $12 million over its lifetime when you include leasing, drilling, completion, years of operating expenses, and plugging. The most expensive horizontal wells with extensive fracturing programs can exceed $15 million. Offshore wells start at tens of millions and can reach $100 million or more for a single deepwater producer, not counting the operator’s share of platform or subsea infrastructure costs that may serve multiple wells.
The economics only work, of course, if the well produces enough oil to cover these costs and generate a return. A productive well in a good formation might pay back its investment within two to three years at favorable oil prices. A dry hole, on the other hand, means the full drilling cost is a total loss, which is why exploration drilling remains one of the highest-risk investments in any industry.