Corporate Valuation, Oil & Gas

June 6, 2018

Tax Reform and Purchase Price Allocations for Oil & Gas Companies

On December 22, 2017, President Trump signed The Tax Cuts and Jobs Act, which resulted in sweeping changes to the U.S. tax code.The Act decreased the corporate tax rate to 21% from 35%, in addition to modifying specific provisions around interest, depreciation, carrybacks, and repatriation taxes.The change in tax rate will have the biggest impact on purchase accounting. In the energy industry, this will manifest itself in several ways.  This blog post explores some of the impacts to valuations performed under fair value accounting in ASC 805 and ASC 820.

Cash Flows and Returns

When we evaluate prospective financial information, a lower tax rate will result in higher after-tax earnings.The value of the tax shield created by depreciation and deductions will be influenced by both the lower corporate tax rate (which reduces the tax shield’s value) and accelerated depreciation of qualifying capital equipment purchases (which increases the tax shield’s value).  This could mean incentives for energy-oriented companies to (i) create a more modernized drilling rig fleet sooner that are best suited for today’s multi-frac lateral wells and (ii) accelerated plans to create more infrastructure and pipelines in active basins such as the Permian, Bakken and Eagle Ford.  In addition, it also could drive more refinery and LNG liquefaction plant development.  

In most cases, a lower tax rate will increase cash flows, increasing the internal rate of return on acquisitions for a given purchase price.On the other hand, if lower tax rates drive higher purchase prices, internal rates of return may be unchanged.In terms of the weighted average cost of capital (WACC), the lower tax rate actually increases the after-tax cost of debt.Keeping other inputs constant, this modestly increases WACCs.

Relief from Royalty

Under the relief from royalty method, after-tax royalties avoided increase as the tax rate falls.However, the tax amortization benefit (TAB) component of the intangible value also declines as a result of the lower tax rate, which serves to partially offset the increase in after-tax cash flows.

Scenario Analysis

In a scenario analysis used to value a noncompete agreement, a lower tax rate will again decrease the tax amortization benefit.Since both scenarios under the with and without approach will reflect the same tax rate, the impact of the new lower rate will be muted.As a result, the fair value of noncompete agreements may well be somewhat lower under the new tax rate.

Cost Approach

The cost approach, which is often used to value assets such as the assembled workforce or some technologies, the impact depends on whether a pre-tax or after-tax measurement basis is used.If fair value is measured on a pre-tax basis, the fair value of such assets is unaffected.If measured on an after-tax basis, costs avoided net of tax will be higher under lower tax rates, although this gain will be offset somewhat by the decrease in the TAB. 

Multi-Period Excess Earnings Method 

The impact of the tax rate on assets valued under the Multi-Period Excess Earnings Method (MPEEM) is more ambiguous since two key elements will be affected – the contributory asset charges and the tax rate used to derive after-tax cash flows.On the cash flow side of things, the lower tax rate will result in higher cash flow but a lower TAB.As far as contributory assets are concerned:

  • Relief from royalty asset charges will increase under a lower tax rate

  • With and without scenario analysis with level payments charges will potentially decrease due to the lower base value

  • Cost approach asset charges may increase or decrease depending on the net effect of taxes and TAB calculations

Reserves & Goodwill 

The net impact of a lower tax rate on goodwill will vary by transaction.  Since reserves are typically viewed through a pre-tax lens, the value of reserves could be muted (all else held constant).  However, we note that if tax incentives increase CapEx and drilling plans, then more reserves could move up the category chain (P2 to P1 for example) and thus increase the fair value of reserves.  If the lower tax rate results in a higher transaction price, the aggregate increase in fair value will likely result in a larger allocation to goodwill.  This would apply more to intangible based energy companies.  Upstream companies typically do not book goodwill.  If, instead, the lower tax rate increases the projected IRR on a transaction, the impact on residual goodwill is harder to predict and will depend on the composition of the assets acquired.

The changes to corporate taxes under the new bill are wide-ranging.In addition to the effect of lower rates discussed in this post, fair value specialists need to be alert to how other specific provisions of the bill may influence individual energy companies.


Impact of Tax Rate Decrease on Valuation Method

  • Cash Flows/Returns Higher after-tax cash flows/impact on returns depends on transaction price

  • Tax Amortization Benefits Decrease

  • Relief from Royalty Method Increase (potential offset by decrease in TAB)

  • Cost Approach (pre-tax) No Change

  • Cost Approach (post-tax) Increase (potential offset by decrease in TAB)

  • With and Without Scenario Potentially lower (potential offset by decrease in TAB)

  • MPEEM May Increase or Decrease (depends on magnitude of other changes)

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Mercer Capital Sponsors ASA Houston’s 2026 Energy Valuation Conference
Mercer Capital Sponsors ASA Houston’s 2026 Energy Valuation Conference
Mercer Capital is pleased to serve as a Gold Sponsor of the 2026 Energy Valuation Conference, hosted by the Houston Chapter of the American Society of Appraisers. The conference will take place on Thursday, May 14, 2026, at The Briar Club in Houston, Texas, with both in-person attendance and live webcast options available. Bryce Erickson, ASA, MRICS; J. David Smith, CFA, ASA; and Andrew B. Frew, ASA, ABV, will attend on behalf of Mercer Capital.Now in its 16th year, the Energy Valuation Conference brings together appraisers, accountants, financial analysts, petroleum engineers, and many other professionals working across the energy sector. The conference is designed as a multi-disciplinary forum addressing valuation techniques and issues across the energy industry, including upstream, midstream, downstream, renewables, power generation, tax, governance, and emerging market considerations.This year’s program will address a range of current valuation topics affecting the energy industry, including energy transition, transaction activity, capital markets, and valuation considerations across upstream, midstream, and downstream sectors.Bryce Erickson is a Managing Director at Mercer Capital and leads the firm’s energy industry practice. Since 1998, he has led approximately one thousand engagements across diverse purposes, including gift and estate tax planning, litigation support, mergers and acquisitions, buyouts, buy-sell agreements, financial reporting, purchase price allocation, financing, and business planning. He regularly publishes on oil and gas industry topics in Mercer Capital’s Energy Valuation Insights blog. He is also a contributor to Forbes.com’s Energy sector.J. David Smith is a Senior Vice President at Mercer Capital and a senior member of the firm’s energy practice. He provides valuation services for tax planning, transactional purposes, and financial reporting. David is also a regular contributor to Mercer Capital’s Energy Valuation Insights blog.Andrew B. Frew is a Vice President at Mercer Capital and has nearly 25 years of business valuation experience. He has been involved with hundreds of valuation and related engagements across numerous industries and values businesses and business interests for gift and estate tax, charitable giving, buy/sell agreements, mergers and acquisitions, business succession and exit planning, and litigation support purposes. Andy also contributes regularly to Mercer Capital’s Energy Valuation Insights blog.Mercer Capital works with energy companies, mineral and royalty owners, oilfield services businesses, investors, attorneys, accountants, and other advisors on valuation and financial advisory matters. The firm provides business valuation, asset valuation, litigation support, transaction advisory, financial reporting valuation, and tax valuation services across the energy sector, helping clients address complex financial questions with clear, independent, and well-supported analysis.Mercer Capital looks forward to supporting the conference and connecting with energy valuation professionals and industry leaders in Houston. Additional information about the 2026 Energy Valuation Conference is available at https://energyvaluationconference.org/.For more information about Mercer Capital’s experience and expertise in the oil & gas sector, visit https://mercercapital.com/industries/energy-power/oil-gas/.
EP First Quarter 2026 Eagle Ford
E&P First Quarter 2026

Region Focus: Eagle Ford

Eagle Ford // The Eagle Ford exhibited modest production growth over the past year, broadly in line with other major basins, as output remained within a relatively narrow range. This stability reflects the basin’s maturity, with limited variability in production despite declining rig counts and continued capital discipline among operators.
Just Released: Q1 2026 Oil & Gas Industry Newsletter
Just Released: Q1 2026 Oil & Gas Industry Newsletter

Region Focus: Eagle Ford

The Eagle Ford exhibited modest production growth over the past year, broadly in line with other major basins, as output remained within a relatively narrow range. This stability reflects the basin’s maturity, with limited variability in production despite declining rig counts and continued capital discipline among operators.

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