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Oil and Gas Depletion Allowance: Cost, Percentage, and Limits

By Jerry Baker

The oil and gas depletion allowance lets an eligible mineral owner deduct part of the resource used to produce income. Cost depletion uses tax basis and recoverable units, while percentage depletion uses qualifying income and legal limits. Neither method makes a flat share of every check tax-free.

What depletion does—and what it does not do

Oil and gas in the ground is a finite resource. Depletion provides a tax deduction connected to that resource as it is used. It is different from a cash payment, a tax credit, or a promise that the property will retain its value.

The basic regulation describes two methods: cost depletion and percentage depletion. For an eligible property, the rules call for the greater allowable deduction under the applicable methods. You do not add both deductions together for the same production. Oil and gas percentage depletion is further limited by section 613A. [1] [2]

A deduction reduces income used to calculate tax. A credit generally reduces tax itself. Mixing up the two can greatly overstate a benefit. A $10,000 deduction is not a $10,000 check from the government.

Also keep tax depletion separate from physical decline. One is a tax calculation. The other concerns how much a well produces. They are related to the same resource, but they do not have to change at the same rate.

First, confirm that you own an economic interest

The depletion regulation requires an economic interest in the minerals. In broad terms, the owner has invested in minerals in place and looks to income from extraction for a return of that capital. A contract that merely provides an economic benefit connected to production is not enough by itself. [1]

Royalty and working interests can require different analysis. So can production payments, trusts, partnerships, and other entities. Start with the legal documents rather than the label on the payment statement.

Owning stock in an ordinary corporation does not let you claim its depletion on your own return. The corporation owns the mineral interest. Pass-through entities have their own rules. For oil and gas, some tax work is done by the owners rather than the entity. [1] [2]

Give your CPA the deed, lease, assignment, and entity documents. A tax form can help report a payment, but it does not replace the facts needed to determine who owns the depletable interest.

How cost depletion works

Cost depletion starts with adjusted tax basis assigned to the mineral interest. That amount may differ from the total purchase price, the current value, or the amount shown on an old family estimate.

First, divide adjusted basis by the recoverable units used in the tax calculation. Then multiply that per-unit amount by units sold during the year. The regulation specifies how to define the units and the annual quantity. [3]

The unit total has two parts. One is the units left at year end, including those recovered but not yet sold. The other is units treated as sold during the year. You cannot divide by only a small part of the deposit to make the deduction larger.

For cash-method taxpayers, the units-sold rule follows units paid for during the year. That can include some units produced earlier. It excludes units sold but not paid for that year and avoids counting units already depleted. Accrual-method rules differ. [3]

This is why payment timing and production timing should both be recorded. A December production report and a January payment may belong in different parts of the tax work.

A cost depletion example

Assume an owner has $300,000 of adjusted depletable basis. The annual calculation uses 150,000 recoverable units: 135,000 remaining at year end plus 15,000 units treated as sold during the year. All quantities represent the owner's interest on the same basis.

The per-unit amount is $300,000 ÷ 150,000, or $2. Cost depletion is $2 × 15,000, or $30,000. Ignoring other adjustments, the remaining basis becomes $270,000.

Now suppose the allowable percentage-depletion calculation for that property would be $6,000. The owner does not claim $36,000. Under the assumed facts, the greater allowable deduction is the $30,000 cost amount.

The numbers are hypothetical. They do not show a usual deduction rate or the expected life of a well. A real calculation needs a supported basis allocation and reliable estimates of recoverable units.

Changing the reserve estimate does not create new purchase basis. It can change how the remaining basis is spread over units. Keep that distinction clear when an updated engineering report arrives.

Reserve estimates need support

Cost depletion calls for the best and most reliable facts available. Use methods current in the industry. Revise the estimate when new facts show a material change in the units left to recover. [3]

Do not pick a low denominator merely to accelerate deductions. Ask who prepared the reserve estimate, which rights it covers, the date of the data, and what changed since the last estimate.

Use the same ownership share for basis and units. If your basis is only for a fractional interest but the units reflect the entire field, the calculation will be distorted. The opposite mismatch can overstate the deduction.

Separate tax reserve work from an offering's valuation. A reserve estimate used for cost recovery does not, by itself, prove what a willing buyer would pay for the interest. Price, timing, costs, risk, and legal rights still affect value.

How percentage depletion works

Percentage depletion starts with qualifying gross income from the property. You then apply the rate set by law. Section 613A sets a 15% rate for eligible domestic production. Its independent-producer and royalty-owner rules also have limits and exceptions. [2]

That does not mean every energy investor qualifies. The law limits production quantities and contains rules for related parties, certain retailers, and certain refiners. Special categories can have different treatment. A familiar percentage is only the start of the review.

For an owner with several properties or related businesses, eligibility is not necessarily tested as if each check came from a separate person. The aggregation and allocation rules matter. Give the CPA the full ownership picture.

Do not assume that buying through an entity removes those limits. Section 613A has specific rules for partnerships and S corporations, including calculation and basis information supplied to the owners. [2]

Use the tax definition of gross income

The amount deposited in your bank may not equal gross income from the property for depletion. A statement can show taxes, costs, or other items between the gross revenue and the net payment.

For oil and gas, the rule generally uses the sale amount near the well. A product may be moved or converted before sale. In that case, the rule uses a representative market or field price before those steps. It does not simply use the later sales price. [4]

Your CPA needs enough detail to apply that rule to the interest and the payment. Do not automatically use total downstream sales, a headline commodity price, or the net bank deposit.

There is another important exclusion. Section 613A(c) excludes lease bonuses and advance royalties from this income base. It also excludes other amounts payable without regard to production. Review cost depletion for those payments too. Exclusion from the percentage method does not settle every depletion question. [2] [5]

An eligible percentage-depletion example

Assume an eligible owner has $80,000 of qualifying gross production income. Assume the 15% rate applies. Production limits do not reduce it. Taxable income from the property, computed as the rules require, is $20,000. No other rule changes the result.

The initial percentage amount is $80,000 × 15%, or $12,000. Assume the owner's specially computed taxable income for the overall limitation is $100,000. The 65% ceiling is $65,000, so it does not restrict this $12,000 amount.

If cost depletion is only $3,000, the allowable percentage amount is larger under these assumptions. The owner's deduction would be $12,000, not $15,000 and not 15% of the purchase price.

Now suppose the whole deduction reduces income otherwise taxed at 24%. This is a hypothetical tax rate used to show the math. The federal tax reduction would be $2,880. Actual results can differ because of tax brackets, other limits, state treatment, and the rest of the return.

The property-income limit is not the same as the overall limit

Section 613 generally limits percentage depletion to a share of taxable income from the property. For oil and gas properties, the statutory share is 100%, rather than the 50% figure often seen for other minerals. The calculation excludes depletion and the section 199A deduction as the law directs. [6]

For a separate illustration, assume qualifying gross income of $100,000 and an otherwise applicable 15% rate. The initial amount is $15,000. If the relevant taxable income from that property is only $8,000, this ceiling reduces the percentage amount to $8,000 before any other applicable limit.

You would still compare the result with allowable cost depletion. This example does not determine the owner's final deduction without that comparison and the other required tests.

Do not assume every amount blocked by every limit receives the same carryforward treatment. The law specifically provides a carryforward for the separate 65% overall limitation. The property-income ceiling is a different rule.

The 65% overall taxable-income limit

Section 613A(d)(1) sets a 65% limit for the deduction under the independent-producer and royalty-owner rules. It uses a special taxable-income base. That base is not gross receipts. It is also not the ordinary adjusted gross income copied from your return. [2]

The law tells you how to adjust this income base. It removes the relevant depletion deduction, the section 199A deduction, and certain carrybacks. Trusts have more details to check. Let the CPA build the base. A rough estimate of household income is not the same number.

Return to a hypothetical $12,000 percentage amount that has passed the property and production tests. Now assume specially computed taxable income is only $10,000 and allowable cost depletion is $3,000. The overall ceiling is $6,500, so the allowable percentage amount is $6,500 under those facts.

The $5,500 blocked by this particular limit carries to the following year under the statute, subject again to the limit. Records must track the amount by property for the required calculations. A carryforward is a possible future deduction, not cash or a guaranteed tax saving next year. [2]

Keep basis current after each year

Depletion changes adjusted basis. That basis is used to figure later cost depletion and gain. The basis rules generally count deductions allowed, but not less than those allowable under the rules. Skipping a deduction may therefore still reduce basis; it does not always preserve the old amount. [7]

Cost depletion stops when the recoverable basis is exhausted. Percentage depletion can sometimes continue after basis has reached zero if the owner and production still qualify. That is a special feature of the percentage method, not permission to claim cost depletion without basis. [3]

Do not reduce the mineral basis below zero merely because an eligible percentage deduction exceeds the basis left. Nor should that excess be shifted into the basis of unrelated equipment or improvements. Keep the mineral and other asset accounts separate.

Ask for a schedule that traces basis through the year. Start with opening basis. Show added costs, the allowed or allowable depletion changes, other changes, and closing basis. A single total on the return may not be enough when you later sell part of the property.

Purchase price is not always your depletion basis

A cash purchase requires a supported allocation among the assets acquired. If you buy land, minerals, equipment, and other rights together, you cannot simply treat the entire check as mineral basis.

An interest received in an exchange may have a carried-over basis rather than a new basis equal to its current value. The Form 8824 instructions show how deferred gain affects replacement basis. A large replacement value can therefore coexist with a much smaller tax basis. [8]

Gifts and inheritances follow other basis rules with exceptions. Do not use an old owner's purchase price, a current estimate, or zero without checking how you acquired the interest. The correct starting basis has to be established before a cost depletion calculation is meaningful.

When records are missing, treat that as work to do. Obtain prior returns, schedules, transfer documents, appraisals when relevant, and the property descriptions. A simple assumption may make a spreadsheet run, but it does not support the tax result.

Entity ownership adds reporting steps

For oil and gas held by a partnership, section 613A generally has each partner figure depletion. The partnership supplies the share of basis and other needed facts. Each partner must keep records. A parallel set of rules applies to S corporation shareholders. [2]

That can make two owners' results differ even when they receive the same cash per unit. They may have different bases, outside income, related holdings, or limits. Do not copy another investor's percentage from a sample tax return.

A trust can require allocation between the trustee and beneficiaries under its governing instrument, local law, and the tax rules. The depletion regulation addresses those arrangements separately. A distribution of cash alone does not settle who gets the deduction. [1]

Give the tax preparer the full annual package, including supplements. Keep corrected forms with notes showing which version was used. A missing property schedule can matter even if the main form arrived on time.

Annual deductions can affect a later sale

Lower basis can increase gain on a later sale. In addition, section 1254 has ordinary-income recapture rules for specified natural resource deductions. For relevant post-1986 property, this can include depletion that reduced basis. It is not limited to drilling costs. Older-property rules can differ. [9]

Do not apply the real estate “25% recapture” shorthand to every mineral sale. Natural resource recapture has its own rules and can produce ordinary income. The character and amount need a property-specific calculation.

An exchange does not always remove that current tax. Section 1254 has a special exchange rule. Trading recapture property for nonresource property can trigger ordinary income even when no cash comes out. [10]

Keep the deduction history for the full ownership period. You may need it years after a return is filed, particularly when selling only part of an interest or deciding whether to exchange into a different asset.

Reconcile the statement before calculating a deduction

Suppose one annual file contains $50,000 of gross well revenue, $5,000 of listed deductions, and $45,000 of net deposits. The arithmetic balances. But it does not yet tell the CPA which amount belongs in each part of the depletion work.

Start by matching each check to a well, interest, and production period. Check the owner decimal against the title file. Then sort the listed deductions by type. A charge for moving gas is not the same as a tax withheld on behalf of the owner. Neither should disappear simply because the bank shows one net number.

Next, match any corrected statement to the version it replaces. Do not count both as new income. If money is held back due to a title dispute, note that fact and give the CPA the payment dates. The units-sold rule may need separate work from the gross-income rule. [3] [4]

Finally, preserve a bridge from the operator's records to the tax schedule. Show what was included, what was left out, and why. That bridge helps prevent both missed amounts and double counting. It also lets a new preparer trace the calculation without guessing from a stack of bank deposits.

An annual record checklist

Before filing, assemble the evidence for the method used. The work should be clear enough that another qualified preparer can follow it later.

Review the result with the investment cash report. The two need not match, but differences should be explainable. A tax deduction should never be presented as an extra cash distribution from the operator.

Frequently asked questions

Does every royalty owner get 15% depletion?

No. The 15% rate is subject to eligibility, production, income, and other limits under section 613A. The type of payment matters too. Review the specific property and taxpayer before applying the percentage. [2]

Can I claim cost and percentage depletion together?

Not as two deductions on the same production. Calculate the allowable amounts under the applicable rules and use the greater allowance. The comparison must reflect the relevant limits, not just the first step of each formula. [1]

Is the deduction based on my net royalty check?

Not automatically. Percentage depletion uses the tax definition of gross income from the property. The net deposit can reflect deductions or other items. Your preparer needs the statement detail and the governing rules. [4]

Can I claim percentage depletion after basis reaches zero?

It may be allowed if you still meet the rules. Cost depletion stops once you have used up the recoverable basis. Percentage depletion works differently. It may still be allowed, but you must apply its limits. [3]

Does a lease bonus qualify for the 15% method?

Section 613A excludes lease bonuses, advance royalties, and certain other nonproduction payments from this percentage-depletion base. Cost depletion may require separate analysis. Do not treat all money from the property alike. [2] [5]

What happens to depletion blocked by the 65% limit?

The amount disallowed by that specific limit carries to the next tax year, subject to the limit again. This does not mean every restriction creates the same carryforward. Track the calculation and property allocation. [2]

Does buying through a partnership simplify everything?

No. Oil and gas depletion generally requires owner-level work using information supplied by the partnership. Your basis and tax limits can differ from those of other partners. Keep the supplemental schedules, not just the main tax form. [2]

Can depletion cause tax when I sell or exchange?

Yes. Basis reductions and natural resource recapture can affect a later transaction. Some exchanges into nonresource property can trigger ordinary income without cash received. Ask the CPA to review the complete deduction history before closing. [9] [10]

Sources and references

  1. U.S. Department of the Treasury; eCFR. 26 CFR § 1.611-1: Allowance of deduction for depletion. Current official resource reviewed October 6, 2026.Relevant sections: Paragraph (b): economic interest requirement and distinction from economic advantage. Accessed October 6, 2026.
  2. U.S. Congress; statutory text reproduced by Cornell Legal Information Institute. 26 U.S.C. 613A: Oil and gas percentage depletion limits. Current statute reproduced by Cornell Legal Information Institute; reviewed October 6, 2026.Relevant sections: Subsections (c) and (d): eligible domestic production, quantity and income limits, exclusions, and lease bonuses.. Accessed October 6, 2026.
  3. Internal Revenue Service. 26 CFR 1.611-2: Rules for mines, oil and gas wells, and other deposits. Current official resource reviewed October 6, 2026.Relevant sections: Paragraphs (a) through (f): cost depletion units and accounts, reserve estimates, valuation-date evidence, and conditions for the present-value method.. Accessed October 6, 2026.
  4. U.S. Treasury regulation via eCFR. 26 CFR § 1.613-3 — Gross income from the property. eCFR displayed current through October 5, 2026; read October 6, 2026.Relevant sections: Oil and gas sales near the well; representative market or field price before transportation or conversion.. Accessed October 6, 2026.
  5. Internal Revenue Service. 26 CFR 1.612-3, Depletion: bonus and advanced royalty. Current official resource reviewed October 6, 2026.Relevant sections: Paragraphs (a)–(c): lease bonus, advanced royalties, cost depletion, basis adjustments, and delay rental. Special oil and gas limits are cross-referenced in paragraph (d).. Accessed October 6, 2026.
  6. U.S. Congress; statutory text reproduced by Cornell Legal Information Institute. 26 U.S.C. 613: Percentage depletion. Current statute reproduced by Cornell Legal Information Institute; reviewed October 6, 2026.Relevant sections: Subsection (a): percentage depletion calculation and property income limit, including the oil and gas exception.. Accessed October 6, 2026.
  7. U.S. Congress; statutory text reproduced by Cornell Legal Information Institute. 26 U.S.C. 1016: Adjustments to basis. Current statute, including 2025 amendments; reviewed October 6, 2026.Relevant sections: Subsections (a)(1), (a)(2), and (b): capital items, allowed or allowable depletion adjustments, and substituted basis.. Accessed October 6, 2026.
  8. Internal Revenue Service. Instructions for Form 8824. 2025 form instructions; reviewed October 6, 2026.Relevant sections: General instructions, real property, foreign property, and line 21 depreciation recapture. Accessed October 6, 2026.
  9. U.S. Department of the Treasury; eCFR. 26 CFR § 1.1254-1: Gain from natural resource recapture property. Current official resource reviewed October 6, 2026.Relevant sections: Paragraphs (a) and (b): ordinary income, costs, property definition, and exceptions. Accessed October 6, 2026.
  10. U.S. Department of the Treasury; eCFR. 26 CFR § 1.1254-2: Exceptions and limitations. Current official resource reviewed October 6, 2026.Relevant sections: Paragraph (d): like-kind exchanges and property outside natural resource recapture rules. Accessed October 6, 2026.

Educational information, not an offer or a personal tax, legal, or investment recommendation. Examples are hypothetical and omit stated adjustments. Tax treatment depends on your facts and current law. Review your transaction with your CPA, attorney, and qualified intermediary. Real estate investments can lose value and may be illiquid.

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