state revenue tax policy Policy Basics
state revenue tax policy

Policy Basics: Corporate Income Taxes in Montana

Policy Basics is a series of background reports on issues related to the Montana budget and Montana taxes. The purpose of the Policy Basics series is to provide the public, advocates, and policy makers the tools they need to effectively engage in important fiscal policy debates that help shape the health and safety of our communities.

Introduction to Montana’s Corporate Income Tax

For generations, our tax dollars have served as shared investments in the programs and services that make our state a great place to live, work, and play. Tax dollars enable Montanans to work together to achieve things which we could not do alone - educate our children, build and maintain infrastructure, provide public safety through police and fire protection, keep our air and water clean, and pave the way to a stronger and more inclusive economy. Corporations that operate in Montana (whether they own property, pay staff, or sell products) are required to pay a tax as a percentage of their net income earned in Montana. In turn, corporations benefit greatly from our shared investments. For example, corporations hire workers educated through Montana’s public schools and colleges, utilize infrastructure like roads and water systems, and benefit from Montana’s public safety and legal system.

Montana, these shared investments are managed through the state’s “general fund.” Taxes make up the vast majority (96 percent) of the revenue for the general fund. The individual income tax is the single largest source of revenue for the general fund, comprising just over half of the state’s tax revenue (Chart 1.)[1],[2] In general, taxes paid by corporations are paid through the corporate income tax. However, depending on how the entity is structured, business income may actually be reported through the individual income tax.

Specifically, if the business is structured as a C-corporation in order to receive the legal benefits associated with such a status (including limited liability for debts and business actions and access to capital markets), its taxes would be classified as corporate taxes. All other businesses, including sole proprietorships, partnerships, limited liability corporations, and S-corporations, report income on individual returns, and this amount is reflected in both pass-through income and business income, which comprises 22 percent of total individual income.[3]

Nationally, corporate taxes as a percent of the economy have declined over the last several decades. In the 1950s, corporate taxes as a percent of the national economy averaged nearly five percent. As of 2017, that rate has dropped to two percent.[4] Likewise in Montana, corporate taxes have been declining since the late 1970s, making up a smaller and smaller portion of total state taxes (Chart 2).[5] In 1981, corporate income tax made up 11 percent of total Montana taxes, whereas in 2015 that number declined to just under six percent.

Most Montana Corporations Pay the $50 Minimum

In 2014, Montana had over 16,000 C-corporations and only a third of them paid more than the $50 minimum corporate tax (Chart 3). According to Montana’s tax code, corporations pay either 6.75% of their net income earned in Montana or $50, whichever is greater.[6]

The phenomenon of corporations paying little to no state taxes has been well-documented nationally. A 2014 national study found that 90 profitable Fortune 500 companies paid no state income taxes in at least one year between 2008 and 2012.[7] During the same period, 269 profitable, Fortune 500 companies paid an effective state corporate income tax rate that was less than half of the actual average tax rate in these states—costing state governments roughly $73 billion in lost revenue over those five years.[8]

Many profitable corporations are able to avoid paying state corporate income taxes because of:

The minimum corporate tax in Montana has been $50 since 1969.[10] Had this tax kept up with inflation, today’s minimum amount would be $340.[11] Updating the corporate minimum tax to account for past inflation and making sure it automatically adjusts for future inflation would modernize our tax system and slow the decline in corporate income taxes. Increasing the corporate minimum tax to $340 would raise at minimum $3 million in additional revenue per year.[12]

As costs rise for providing the basic public services, infrastructure, and education that benefit corporations, the contributions of those corporations should rise too.

Some Good News: Montana Has Been a Leader in Combined Reporting

Combined reporting is an important policy tool that prevents corporations from utilizing a variety of tax avoidance strategies. Montana has been a leader in this area by using combined reporting for decades. A majority of states with corporate income taxes now utilize combined reporting.[13] 

What is Combined Reporting?

Many large companies consist of a parent company and its subsidiaries. Combined reporting requires a parent company to add its income and its subsidiaries’ incomes for the purposes of state corporate income taxes. Montana then taxes its share of the total income based on the level of activity in Montana. States without combined reporting are vulnerable to a wide array of tax avoidance strategies by corporations. The tax avoidance strategies usually involve artificially shifting profits to subsidiaries that are in states without corporate income taxes or that do not tax a specific type of subsidiary.

Combined reporting ensures that corporations pay their fair share of taxes in Montana based on their corporate activity in Montana. In addition, it improves fairness for smaller Montana-based companies. Local companies do not have subsidiaries across the country to which they can shift profits. Without combined reporting, large, multistate companies could engage in tax avoidance strategies that give them a competitive advantage over smaller, local businesses.

Outdated Tax Havens List Limits the Effectiveness of Combined Reporting

Montana requires worldwide combined reporting, which means that corporations with common ownership must report all income worldwide, unless they make a “water’s edge election.” The water’s edge election allows multinational corporations to only report their income from the United States, rather than their worldwide income. In exchange, these companies agree to pay a 7% tax rate, rather than the normal rate of 6.75%.

There are some limits to the water’s edge exclusion of international income. If a subsidiary is located in a country that is a known tax haven, the corporation may not exclude that subsidiary’s income even under the water’s edge election. In order for this exception to be useful and avoid inappropriate income shifting, the list of tax havens must be updated regularly in Montana law.

The water’s edge election creates an uneven playing field for Montana-based businesses without an international presence, as it allows multinational businesses the opportunity to shift profits overseas without paying state corporate tax reflecting actual operations in the state. Tax haven abuse has grown exponentially over the past several decades, as more and more corporations have become international in scope and the industry of tax attorneys and accountants specializing in international tax planning has expanded. A 2015 report by Congressional Research Service estimates the overall loss of revenue to the United States as a result of offshore tax shelters at around $100 billion per year.[14] The number of corporations that filed a water’s edge election in Montana increased 163 percent from 2007 to 2014.[15] A proposal to eliminate the water’s edge election has been proposed but has not passed in the past several legislative sessions, most recently in the 2017 session, which would raise approximately $8 million in additional revenue.[16]

Net Operating Loss Carryback Worsens Montana’s Fiscal Challenges in Downturns

The net operating loss carryback, a relatively obscure and costly feature of the income tax code, allows businesses experiencing an operating loss in the most recent tax year to file amended tax returns for the three previous years, deducting the current year’s loss against any profits earned in those previous years.[17] The corporation can elect to receive a refund or apply the refund to the next year’s tax liability. Montana is one of only 17 states that still allows the net operating loss (NOL) carryback deduction.[18] Unlike Montana, a number of these states have restricted the amount of losses that companies can carryback.[19] For example, Idaho limits losses that can be carried back to $100,000 in the preceding two years. [20]

The NOL is particularly harmful during economic downturns. Individuals and corporations earn less during downturns and, in turn, tax revenue to the state decreases. Allowing businesses to receive a refund for previously paid taxes serves only to further compound Montana’s revenue problems during downturns. As a result, the state may struggle to fund essential public services like education, healthcare, prescription drug and child care assistance at a time when many Montanans need them the most. Eliminating the NOL carryback would bring in much-needed revenue, decrease the volatility of corporate tax revenues, and avoid unnecessary, self-inflicted fiscal damage for the state.

If the NOL carryback were eliminated, businesses could still utilize the NOL carryforward. This provision allows businesses to carry their net operating losses forward and deduct them against future profits, providing tax relief for corporations during difficult times, but not at the expense of fiscal responsibility.

Corporate Tax Expenditures

Tax expenditures are often described as ‘‘silent spending.’’ They come in the form of preferences such as tax deductions, exemptions, deferrals, exclusions, credits, or lower tax rates given to individuals or businesses. Tax expenditures are considered a form of spending because they allocate funds for specific public purposes, but not through direct appropriations. These expenditures are commonly referred to as tax loopholes or incentives. They have a significant impact on state revenue as they reduce or eliminate revenue that would have otherwise been collected. Tax expenditures are not inherently good or bad policy. However, just like other state spending, they should be reviewed and evaluated on a regular basis to evaluate whether they are meeting the intended goals.

The Department of Revenue creates a report of tax expenditures each biennium. However, there is no requirement that tax expenditures are reviewed regularly by the Legislature. Corporate tax expenditures cost Montana between $10 and $15 million per year.[21] For more information about tax expenditures see Montana Budget and Policy Center’s 2011 report, Flying Under the Radar: Time to Evaluate Tax Expenditures.

Reforms for a Stronger Montana

All Montanans want a strong economy where small businesses can thrive, where workers can support their families, and where our children can stay in Montana and find meaningful work. To create a more inclusive and prosperous economy for future generations, we must continue to invest in our education systems, in our infrastructure, and in the health and safety of our communities. The corporate income tax is one way that we pool our resources to make sure that those investments happen. The following reforms would modernize Montana’s corporate income tax system and strengthen our ability to invest in a stronger and more inclusive economy:


[1] Montana Legislative Fiscal Division. “Report to Revenue and Transportation Interim Committee Members.” Fiscal Year 2017. June 4, 2018.

[2] Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016. See also Legislative Fiscal Division. “2021 Outlook for the General Fund Budget.” June 18, 2018.

[3] Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016.

[4] Office of Budget and Management. “Historical Tables: “Receipts by source as Percentage of GDP: 1934-2023.” Accessed September 28, 2018.

[5] Urban Institute. “State and Local Finance Initiative Data Query System.” Accessed September 26, 2018.

[6] Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016. Because of privacy restrictions, data is not available on which corporations paid the minimum of $50.

[7] Robert S. McIntyre, Matthew Gardner, and Richard Phillips. “90 Reasons We Need State Corporate Tax Reform.” Citizens for Tax Justice and the Institute on Taxation and Economic Policy. March 2014.

[8] Robert S. McIntyre, Matthew Gardner, and Richard Phillips. “90 Reasons We Need State Corporate Tax Reform,” Citizens for Tax Justice and the Institute on Taxation and Economic Policy, March 2014.

[9] Robert S. McIntyre, Matthew Gardner, and Richard Phillips. “90 Reasons We Need State Corporate Tax Reform,” Citizens for Tax Justice and the Institute on Taxation and Economic Policy, March 2014.

[10] Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016.

[11] U.S. Bureau of Labor Statistics. “CPI Inflation Calculator.” September 26, 2018.

[12] This is a conservative estimate of the amount of revenue an increase in the minimum corporate tax would generate, as it is calculated using the number of corporations currently paying the minimum $50 tax. It does not include corporations currently paying between $51-$340 who would also be affected by the increase. MBPC calculation using Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016.

[13] Michael Mazerov. "A Majority of States Have Now Adopted a Key Corporate Tax Reform — “Combined Reporting.” Center on Budget and Policy Priorities. April 3, 2009.

[14] J. Gravelle. “Tax Havens: International Tax Avoidance and Evasion.” Congressional Research Service. January 15, 2015.

[15] Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016.  Montana Department of Revenue. "Biennial Report: July 1, 2012- June 30, 2014."  December 2014.

[16] Governor’s Office of Budget and Program Planning. “Fiscal Note 2019 Biennium: SB 105.” January 19, 2017.

[17] Montana Annotated Code 15-31-119.

[18] Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016.

[19] Michael Mazerov. "Minority of States Still Granting Net Operating Loss “Carryback” Deductions Should Eliminate Them Now."  Center on Budget and Policy Priorities. May 11, 2009.

[20]Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016.

[21]The water’s edge election expenditure amount is an estimate from $8-13 million. Montana Department of Revenue. "Biennial Report: July 1, 2014- June 30, 2016."  December 2016.
Montana Budget & Policy Center

Shaping policy for a stronger Montana.

MBPC is a nonprofit organization focused on providing credible and timely research and analysis on budget, tax, and economic issues that impact low- and moderate-income Montana families.