Severance taxes by state vary widely: roughly 34 states charge some kind of tax or fee for extracting non-renewable resources, and each one calculates the bill differently. Some tax a percentage of the resource’s market value, others charge a fixed rate per barrel or cubic foot, and several blend the two with graduated brackets, credits, and exemptions. Which method your state uses determines whether your liability swings with commodity prices or stays roughly flat quarter to quarter.
What Severance Tax Actually Applies To
A severance tax is triggered by pulling a non-renewable resource out of the ground, not by the later sale of a refined product. Oil, natural gas, and coal generate most of the revenue, but the tax reaches further than that. At least nine states apply a severance-style tax to timber harvesting, and several extend it to metallic minerals, molybdenum, and oil shale. The taxable event is extraction itself, which is why the tax attaches even when a well or mine loses money overall.
Value or Volume: The Two Calculation Methods
Every state’s formula starts from one of two approaches.
Ad Valorem (Percentage of Value)
Ad valorem taxes are calculated as a percentage of the resource’s market value at the point of production. Texas uses this method, charging 4.6% on the market value of crude oil and 7.5% on natural gas.1Texas Comptroller of Public Accounts. Crude Oil Production Tax2Texas Comptroller of Public Accounts. Natural Gas Production Tax Because the bill tracks prices, state revenue rises in boom years and drops in downturns. This is the most common approach among major producing states.
Unit-Based (Fixed Rate Per Volume)
Unit-based taxes charge a set dollar amount per physical unit extracted: cents per thousand cubic feet of gas, dollars per ton of coal. The tax is decoupled from price swings, which gives the state steadier revenue. Alaska caps the tax on certain Cook Inlet gas production at 17.7 cents per thousand cubic feet regardless of the downstream sale price.3National Conference of State Legislatures. State Oil and Gas Severance Taxes
Graduated and Hybrid Systems
Colorado shows how states blend the two. Rather than one flat percentage, Colorado taxes oil and gas on a graduated scale tied to gross income: 2% on the first $25,000, 3% between $25,000 and $100,000, 4% between $100,000 and $300,000, and 5% above $300,000.4Justia. Colorado Code 39-29-105 – Tax on Severance of Oil and Gas Producers can then deduct 87.5% of any local ad valorem property taxes paid on actual production, which pulls the effective state rate down where local taxes are heavy.5Colorado Department of Revenue. Severance Tax Information for Owners of any Interest in any Oil and Gas Produced in Colorado Wells producing 15 barrels of oil or less per day, or 90,000 cubic feet or less of gas per day, are exempt outright.
How Taxable Value Gets Determined
For ad valorem states, the argument over what you owe often comes down to what counts as “value.” Most states define the taxable event at or near the wellhead, but the resource may not actually be sold until it reaches a distant pipeline interconnect or processing plant. Everything that happens in between is where post-production costs enter the calculation.
Post-production costs are expenses incurred after the resource leaves the ground but before it reaches a buyer: gathering, transportation, compression, dehydration, processing. In wellhead-valuation states, operators typically use a net-back method, starting with the downstream sale price and subtracting reasonable post-production costs to reach a taxable wellhead value. The result is a lower tax base. Which costs qualify, and in what amount, varies by state, and disputes over these deductions are a regular source of litigation between producers and state tax authorities.
Rates in Major Producing States
Rules vary enough that operators working across state lines face meaningfully different tax structures. A few examples cover most of the range.
Texas
Texas charges 4.6% of market value on crude oil and 7.5% on natural gas, both purely ad valorem.1Texas Comptroller of Public Accounts. Crude Oil Production Tax Condensate from gas wells is taxed at the crude oil rate of 4.6%, not the higher gas rate.2Texas Comptroller of Public Accounts. Natural Gas Production Tax
Oklahoma
Oklahoma imposes a 7% gross production tax on oil and gas, but new wells get a break. Production from wells spudded on or after the statute’s effective date is taxed at 5% for the first 36 months, then reverts to 7%. Oklahoma also allows full exemptions for approved secondary and tertiary recovery projects for up to five years, and a 24-month exemption for wells completed using recycled water.6Justia. Oklahoma Code 68-1001 – Gross Production Tax on Asphalt, Ores, Oil and Gas, and Royalty Interests
Wyoming
Wyoming charges a 6% state severance tax on the value of oil and gas production, plus a separate county-level ad valorem tax that averages around 6.9% statewide.7Bureau of Land Management. Wyoming Oil and Gas State Taxes The combined burden can exceed 12% before exemptions. The county ad valorem rate is assessed against market value minus the basic royalty and any trucking costs for oil.
Montana
Montana’s rates depend on well age, production method, and the type of interest held. For post-1999 wells past their incentive period, working-interest owners pay 9.3% and nonworking-interest owners pay 15.1%. New wells qualify for a reduced 0.8% rate for the first 12 months of production, and horizontally completed wells get 18 months at that introductory rate.8Montana Department of Revenue. Oil and Natural Gas Production Tax Stripper wells averaging fewer than 15 barrels per day follow a separate reduced schedule.
Pennsylvania
Pennsylvania stands out among major gas-producing states for not imposing a traditional severance tax. It instead charges an unconventional gas well impact fee at the local level. Proposals to add a statewide severance tax on top of the impact fee have been introduced repeatedly but have not been enacted as of this writing.
Incentives That Change the Effective Rate
Almost every producing state pulls its headline rate down through exemptions and credits designed to keep marginal production economical.
- New well discounts. Oklahoma’s 36-month reduced rate on newly drilled wells is typical; the idea is to let initial cash flow cover drilling costs before the full rate applies.6Justia. Oklahoma Code 68-1001 – Gross Production Tax on Asphalt, Ores, Oil and Gas, and Royalty Interests
- Stripper well exemptions. Low-producing wells that might be shut in under full tax often get reduced rates or full exemptions. Colorado exempts wells producing 15 barrels or less per day.4Justia. Colorado Code 39-29-105 – Tax on Severance of Oil and Gas
- Enhanced recovery credits. Oklahoma exempts production from approved secondary and tertiary recovery projects for up to five years, recognizing the additional capital needed to work mature fields.6Justia. Oklahoma Code 68-1001 – Gross Production Tax on Asphalt, Ores, Oil and Gas, and Royalty Interests
- Horizontal drilling incentives. Montana taxes horizontally completed wells at 0.8% for 18 months against 9.3% for conventional post-incentive wells.8Montana Department of Revenue. Oil and Natural Gas Production Tax
The effective rate in a given state can end up well below the headline figure, particularly during a well’s early years.
What Royalty Owners Actually Pay
If you receive royalty checks, severance tax is already being deducted before the money reaches you. The operator withholds your proportional share and remits it to the state. In Colorado, producers must withhold 1% of the gross income owed to anyone holding a working interest, royalty interest, or other production interest.5Colorado Department of Revenue. Severance Tax Information for Owners of any Interest in any Oil and Gas Produced in Colorado
The point that catches many royalty owners off guard: severance tax is levied on gross production value, not on profit. You owe your share even if the well is losing money overall, because the tax attaches to extraction, not to the financial outcome.5Colorado Department of Revenue. Severance Tax Information for Owners of any Interest in any Oil and Gas Produced in Colorado State severance taxes are generally deductible against federal income tax, which helps, but the cash flow hit lands immediately while the federal benefit comes at filing.
Where the Revenue Goes
States route severance revenue through some combination of general operations, local government support, and long-term trust funds. The mix matters if you’re comparing how a state treats the communities where extraction happens. Colorado splits its severance receipts evenly between a state trust fund and a local government fund.9Justia. Colorado Code 39-29-108 – Severance Tax Trust Fund West Virginia sends 75% of its oil and gas severance revenue to producing counties and distributes the remaining 25% to all counties and municipalities based on population.10West Virginia State Treasurer’s Office. Oil and Gas Severance Montana, New Mexico, and Wyoming each maintain permanent trust funds seeded by extraction revenue, investing the principal and using earnings for public purposes.11Montana State Legislature. HJ 6 – States Investment of Trust Funds Alaska’s Permanent Fund, often grouped with these, is actually built from mineral royalties rather than severance taxes.12Alaska Permanent Fund Corporation. Frequently Asked Questions
Penalties for Late Payment
Missing a severance tax deadline gets expensive fast. States charge both flat penalties and running interest on delinquent balances. Colorado charges a late-payment penalty equal to the greater of $30 or 30% of the tax owed, plus interest at 11% annually, or 8% if the balance is paid within 30 days of a deficiency notice.13Colorado Department of Revenue. Tax Topics – Penalties and Interest Structures vary, but late-payment charges of 10% to 30% of the unpaid amount, combined with annual interest between 7% and 12%, are common across producing states. An additional negligence penalty may apply if the state finds the underpayment was intentional or reckless.