Why focus so much on lowering income taxes?

We rarely complain about having too many tax cuts to choose from.

Given the opportunity, lawmakers can reduce property taxes, issue rebates, expand deductions, create credits, lower business taxes or simply send excess revenue back to taxpayers. Most of those ideas have merit. When government collects more than it needs, taxpayers should benefit.

But all tax cuts are not created equal.

If states want tax relief that does more than provide temporary relief—if we want a tax cut that changes the state's long-term economic trajectory—then reducing the individual income tax should be near the top of the list. And Montana is front and center in the current conversation.

The reason comes down to incentives.

A property-tax rebate can put money back in a homeowner's pocket. A one-time check can certainly help a family pay the bills. A targeted credit may benefit the people who qualify for it. Those are real benefits, and property taxes in particular remain a serious concern for many Montana families.

But none of those changes the reward for earning the next dollar.

The income tax does.

Every time a worker considers taking additional hours, accepting a promotion or starting a side business, the income tax affects how much of the additional earnings that person gets to keep. Every time an entrepreneur weighs starting a company, a business owner considers expanding, or an investor decides where to put capital, taxes on income affect the potential return.

That's why economists pay so much attention to marginal income tax rates. They don't simply determine how much government collects. They influence the economic decisions people make every day.

Montana's own tax reform history illustrates the point. For decades, the state steadily reduced income tax rates and simplified what was once a far more complicated system. The top marginal rate reached 11 percent in the 1980s. Beginning in 2003, lawmakers began reducing rates and brackets, and more recent reforms have continued that progress.

Now Montana has an opportunity to finish the job by moving to one flat rate of 4.7 percent.

There is a simplicity argument for doing that, and it is a good one. One rate is easier to understand than multiple rates. A simpler code reduces confusion and makes tax planning easier for households and employers.

But simplicity isn't the strongest argument.

Economics is.

Thousands of Montana businesses do not pay their taxes through the traditional corporate income tax. Sole proprietorships, partnerships, LLCs and S corporations often pass their income through to owners, where it is taxed under the individual income tax system.

That means when Montana reduces the individual income tax rate, it isn't merely cutting taxes for wage earners. It is changing the tax environment for entrepreneurs and small businesses across the state.

That matters enormously in a region where Montana is competing against some of the most aggressive tax states in America.

Wyoming and South Dakota levy no individual income tax at all. North Dakota's top rate is substantially lower than Montana's. Idaho has a flat tax. Workers and businesses may love Montana's mountains, communities and quality of life, but state borders do not prevent them from comparing costs.

Capital is mobile. Businesses are mobile. Increasingly, workers are mobile too.

Montana therefore has to ask a different question when considering tax relief. Not simply, "How do we give some money back?" but, "Which tax reform leaves Montana stronger five, ten or twenty years from now?"

Economic modeling commissioned by Mountain States Policy Center provides some indication of the difference. Moving to a 4.7 percent single-rate income tax is projected to increase Montana's annual gross state product by about $525 million, increase annual wages by approximately $286 million and support roughly 2,445 additional full-time equivalent jobs. And Montanans would also see an increase in yearly income of $642.

Those estimates are important because they capture something a rebate cannot.

A rebate gives someone money once.

A lower marginal income tax rate changes incentives every year.

It changes the return from taking another shift. It changes the calculation for an entrepreneur considering a new business. It changes the economics of an existing company investing in equipment, adding another location or hiring another employee.

And when thousands of Montanans make slightly different decisions because the rewards for work and investment improve, those decisions accumulate into greater economic activity.

This does not mean other taxes should be ignored. Property-tax reform is especially important. Homeowners should not be taxed out of homes they worked decades to own, and local governments should be held accountable for spending decisions that drive property-tax bills higher.

But property-tax relief and income-tax reform solve different problems.

Property-tax relief addresses affordability and the cost of owning property.

Income-tax reform addresses growth, competitiveness and the incentive to produce more.

Montana needs both conversations.

We also shouldn't confuse one-time tax relief with permanent structural reform. A rebate disappears when the check is deposited. A temporary credit can disappear when lawmakers change it. A lower statutory income tax rate remains embedded in the state's economic structure, influencing millions of decisions year after year.

And there is another advantage: transparency.

A flat 4.7 percent rate gives Montanans a number they can immediately understand. When workers earn additional taxable income, they know the rate. When an entrepreneur models the cost of locating a business here, the rate is clear. When Montana competes against another state, the comparison is straightforward.

That kind of predictability has value of its own.

Tax policy inevitably involves tradeoffs. A tax cut means the government collects less than it otherwise would, at least initially, and policymakers should take that fiscal impact seriously. The economic analysis estimates a static revenue impact of roughly $210 million from a 4.7 percent flat tax compared with the 2026 baseline, falling to approximately $192 million after accounting for projected additional economic activity.

That is a legitimate cost to debate.

But the other side of the ledger matters too.

What happens to wages? What happens to employment? What happens to investment? What happens when businesses decide whether Montana is where they want to expand?

Tax policy should not be judged exclusively by how much revenue government retains. It should also be judged by what happens to the economy that generates that revenue in the first place.

Montana has many ways to cut taxes.

Some will provide temporary relief. Some will help specific groups. Some will address very real problems like rapidly increasing property-tax bills.

But if the goal is to make Montana more competitive, encourage investment, reward work and create a stronger foundation for long-term growth, reducing the individual income tax deserves special attention.

Because the best tax cut isn't necessarily the one that produces the biggest check today.

It's the one that creates more opportunity tomorrow.