A silver lining for conservatives in the Supreme Court’s health care decision Thursday is that the court allowed the law to stand based on the idea that the individual mandate was a tax.



That news has Republicans and conservative radio talk show host Rush Limbaugh bringing out an old -- and incorrect claim -- that the health care law constitutes the largest tax increase ever.

Rep. Connie Mack, a Republican from Florida running for the U.S. Senate, called it "the largest tax on the American people in history" in a press release. Florida GOP congressional candidate state Rep. Gary Aubuchon said on Twitter that the "ruling confirms Obamacare is the largest tax increase in U.S. history.

U.S. Rep. Jeff Landry, R-Pa., put it this way: "This is the largest tax increase on the poor and the middle class in the history of this country"; and Alabama Republican Party chair Bill Armistead said that "The United States Supreme Court has essentially created the largest tax increase in American history."

Then there's Limbaugh, who turned up the rhetoric on radio the way only he can.

Forget the United States,"Obamacare is nothing more than the largest tax increase in the history of the world," he declared.

This claim is wrong.



While the health care law certainly is, on the whole, a tax increase, it’s not the largest in American history -- and as such -- cannot be the largest in the history of the world. (Luckily, there's enough U.S.-based research that we don't have to explore the tax increases of the Roman Empire, adjusted for inflation.)

We addressed this more than a year ago. But here’s a refresher.



Major tax provisions



The federal Joint Committee on Taxation, a nonpartisan committee of Congress with a professional staff of economists, attorneys and accountants, provided members a detailed breakdown of the tax impact of the health care law from 2010-2019.



• Starting in 2013, Medicare payroll taxes increase 0.9 percentage points for people with incomes over $200,000 ($250,000 for couples filing jointly). Also, people at this income level would pay a new 3.8 percent tax on investment income. The 10-year cost: $210.2 billion.



• Starting in 2018, a new 40 percent excise tax on high-cost health plans, so-called "Cadillac plans" (over $10,200 for individuals, $27,500 for families), kicks in. That's expected to bring the government a total of $32 billion in 2018 and 2019.



• Starting in 2011, there's a new fee for pharmaceutical manufacturers and importers. That's expected to raise $27 billion over 10 years.



• Starting in 2013, a 2.3 percent excise tax on manufacturers and importers of certain medical devices starts. The 10-year total: $20 billion.



• Starting in 2014, a new annual fee on health insurance providers begins. Total estimated 10-year revenue: $60.1 billion.



• Starting in 2013, the floor on medical expense deductions on itemized income tax returns will be raised from 7.5 percent to 10 percent of income. That's expected to bring in $15.2 billion over the next 10 years.



• Starting in 2011, a 10 percent excise tax on indoor tanning services. That's expected to bring in $2.7 billion over the next 10 years.



There also is money in the law going the other way. The plan includes government money, in the form of tax credits, to subsidize the cost of health insurance for lower-income people who don't get insurance through their employer. For the record, many Republicans and tax experts argue those shouldn't count as tax cuts. And there is a tax cut for some very small businesses that allows them to write off a portion of the cost of providing insurance to their employees.



Combined with various other revenue-generating provisions, the Joint Committee on Taxation estimates the health law will bring in more than $437.8 billion by 2019. The government's nonpartisan Congressional Budget Office estimated the additional revenues coming in to the government to be $525 billion between now and 2019.



Does that translate to the biggest tax increase in American history?



Comparing tax impacts of legislation



First, we need to set some goal posts. There are many ways to define or measure the size of a tax increase, and not all tax increases have been measured the same way over time. The health care tax provisions, for instance, take effect between 2011 and 2018, meaning the full effect of the legislation won't be felt until near the end of the decade. On top of that, it doesn't make sense to compare 2019 dollars to 1985 dollars. You have to adjust for inflation, or express the amount as a total of Gross Domestic Product at the time, which is a way to measure the relative impact of a tax provision at the time it was enacted.



To make matters even more complicated, there are tax cuts that are direct results of tax increases, and vice-versa. The Tax Equity and Fiscal Responsibility Act of 1982 (TEFRA), for example, was passed largely to reverse revenue losses from the Economic Recovery Tax Act of 1981 (ERTA).



For our comparison, we used a method perfected by Jerry Tempalski, an analyst in the Office of Tax Analysis with the U.S. Department of the Treasury. In 2006, Tempalski tried to determine the relative impact of major tax revenue bills from 1940-2006. He used revenue estimates from Treasury and the Joint Committee on Taxation and calculated the impact as a percentage of GDP.



For 1940-1967 calculations, he used a single-year snapshot of the revenue impact of the tax legislation. For more recent tax bills, from 1968-2006, Tempalski used a two-year average of the revenue effects. Tempalski wrote: "The comparison of tax bills for the first period should be examined with some caution, because the revenue estimates are from different sources and are not completely consistent. The comparison for the second period can be viewed with more confidence, because the estimates are relatively consistent."



As a percent of GDP, here are the top five tax increases from 1940-2006, according to Tempalski:



1. Revenue Act of 1942: 5.04 percent of GDP;



2. Revenue Act of 1941: 2.2 percent of GDP;



3. Current Tax Payment Act of 1943: 1.13 percent of GDP;



4. Revenue and Expenditure Control Act of 1968: 1.09 percent of GDP;



5. Excess Profits Tax of 1950: .97 percent of GDP;



And here are the top five tax increases from the "modern" era of 1968-2006:



1. Revenue and Expenditure Control Act of 1968: 1.09 percent of GDP;



2. Tax Equity and Fiscal Responsibility Act of 1982: .8 percent of GDP;



3(t): Crude Oil Windfall Profit Tax Act of 1980: .5 percent of GDP



3(t): Omnibus Budget Reconciliation Act of 1993; .5 percent of GDP;



5: Omnibus Budget Reconciliation Act of 1990; .49 percent of GDP.



The 2010 health care law



The list obviously does not include the health care law, which passed in 2010, and a spokeswoman for the Department of Treasury says it hasn't been updated. So we calculated our own percent of GDP figure. We used 2019 as our baseline because that's when all of the tax provisions of the law will be in effect. In 2019, the CBO estimates, the government will see increased revenues of $104 billion. We then divided that number into the projected GDP for 2019, which according to the CBO economic forecast is $21.164 trillion. That would mean the tax increase provisions of the health care law would amount to .49 percent of total GDP.



Depending on your rounding, that would mean the tax increases resulting from the health care law would be about the size of tax increases proposed and passed in 1980 by President Jimmy Carter, in 1990 by President George H.W. Bush and in 1993 by President Bill Clinton.



The health care-related tax increases are smaller than the tax increase signed into law by President Ronald Reagan in 1982 and a temporary tax signed into law in 1968 by President Lyndon B. Johnson. And they are significantly smaller than two tax increases passed during World War II and a tax increase passed in 1961.



The tax increases in the health care legislation do reverse a trend of federal tax cuts and represent the first significant tax increases since 1993.

But they are not the largest in the history of the United States.

And -- despite what Limbaugh said -- that means they cannot be the largest ever in the history of world. Limbaugh's inflated rhetoric takes a wrong claim and puts it into the realm of the ridiculous. We rate it Pants on Fire.

UPDATE: Some readers noticed that our initial analysis of Limbaugh’s claim failed to include references to the penalty that people who declined to purchase health insurance would be asked to pay. After all, the Supreme Court declared that penalty a tax.



The CBO figure we used for our calculation, a total of $104 billion in revenue generated in 2019, is inclusive of all revenues, including the penalty or tax individuals might pay if they do not purchase health insurance. The figure for that year was estimated to be $14 billion for penalties paid for by employees and individuals. (Page 19 of this report.)