How to Think About Taxes

Here's my contribution to today's tax day festivities: an effort to get you to think about federal taxes a little bit differently than usual. Normally, when we talk about taxes, we end up talking about percentages of people: the top 1% pay a certain amount, the bottom third pay a different amount, etc. But this is the wrong way to look at things. What we ought to be looking at is percentages of income.
Have your eyes glazed over yet? Just wait! It's going to get worse. But first a caveat: the numbers that follow aren't exact. I don't think they're way off the mark, but they're the result of some rough interpolation from several different data sources. Anyone with access to more detailed data is welcome to correct this, but in the meantime it should be close enough to give you an idea of how to look at this stuff.
So: percentages of income. What I mean by this is that you'd expect a group of people with, say, one-fifth of the nation's total income to pay one-fifth of total federal taxes. (Note: one-fifth = 20%, or one quintile in tax-speak.) It doesn't really matter if that group has one-fifth of the people or not, just that it has one-fifth of the money. Like this:

But hold on. That's a flat tax, and I want to appeal to your native sense of fairness here. Even most conservatives agree that taxation ought to be at least mildly progressive, so let's make this mildly progressive. First, let's say that the middle quintile, almost by definition, ought to pay 20% of total taxes. Like so:

The next quintile up ought to pay a higher share, and the quintile above that even more. The slope of the increase doesn't need to look like a hockey stick, but it should trend clearly upward. Let's say it should be 8% more for each quintile:

Likewise, the quintile below the middle ought to pay a lower share, and the poorest quintile ought to pay even less. Something like this:

Question: does this seem roughly fair to you? If you're a die-hard flat-taxer, it won't, but for most people, even conservatives, it ought to seem reasonable. It's progressive, but the slope is moderate and consistent. So now let's take a look at the income cutoffs that produce our five quintiles. Here they are:

Most people are surprised at how high the income cutoffs are. But that's how it works out. If you add up the incomes of every single household that makes less than $50,000 — all 50 million of them — they earn only a fifth of the total income. If you add up the tiny number of people who make more than $300,000, they also earn a fifth of total income. So now, instead of looking at our theoretical progressive system, let's see the actual numbers. Here they are:

As you can see, when you add up all federal taxes and compare it to where the money is, our system is only barely progressive at all. The bottom quintile doesn't do too badly, though they're probably paying a little more than they should, but CEOs and bankers are paying only slightly more than teachers and engineers. And if you add in state and local taxes, even this small amount of progressivity goes away. You can come at this from a lot of different angles, but you always end up with the same answer: taken as a whole, our tax system is close to flat. Does this seem fair to you? It shouldn't.
NOTE: As I said above, these numbers are rough interpolations from several sources. The high-end income data is from Piketty and Saez, here. The middle income aggregates and cutoffs are from Census figures, here and here. Tax shares are from the CBO, here.
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Comments
based on those numbers, it
Brilliant!!
Kevin's tax analysis
CBO
Income tax analysis
all federal taxes
I agree - brilliant.
A post worth logging in to commend!
Teaparty participants
Bottom quintile
Genius!
Depends on what you mean by Share of taxes
Tax Day Tea Parties
Bobreply, if you are in the
Lorenz Curve
Note To KJ
to reino regarding kj's post
It would be nice to collect
Follow Up Questions
Thanks Reino
Are the income figures gross
median income
Great Post
The big picture
Marginal tax rates?
Additional numbers...
Too bad we can't all be in the top quintile
taxes
Kevin, your charts need tweaking!
new Republicans
off the mark
Larry's idea of a fair,
Excellent post!
flat or progressive
between pure logic and pure emotion, consider...
Marginal Value of a Dollar
-that those who make more should pay a higher rate--has never made any real sense to me.The leftist/progressive answer to your question is what right-wingers object to: income redistribution. Most Europeans, including the vast majority who aren't Socialists, support progressive taxation on this basis. It's a social justice argument. However, there's a more centrist, liberal rationale for progressive taxation: the marginal value of the dollar. Essentially, the argument is that a dollar in the pocket of a man who makes $10,000 a year is worth a lot more to him than a dollar in the pocket of a man who makes $100,000 a year. As wealth increases, the marginal value of a dollar decreases. Therefore, taxing 10% of income for a low-income person is effectively a higher level of taxation than taxing 10% of income for a high-income person. Thus, progressive taxation can account for the differing marginal values of a dollar and "evens out" the effective tax rates for all income levels. Right-wingers will object to the latter argument. But I think they're just being ideological. My own personal experience is that the few years that I made mid-six-figures income during the dotcom era, a hundred dollars was worth much less to me than it is now, when I'm quite poor. It's obvious that the marginal value of a dollar changes depending upon total income. The combination of the two arguments produces a significantly progressive tax system. Incidentally, I suspect that lots of people don't comprehend how our tax system is progressive with regard to marginal income brackets, not total income.
A flatter path to progressiveness
Why not have a constant marginal tax rate for all taxable incomes, but give fixed-size household (or individual, if you prefer) exemptions when computing taxable income from gross income.
Think of this as exempting survival costs from taxation, and it seems pretty fair. But it is also pretty progressive at the lower end of the income ladder, where the progressiveness matters most. Thus its overall feel is more like helping the less well-off than hurting the more well-off.
For example using the simplest case - say a fixed household exemption of $30,000 and a universal marginal rate of 25% - the effective tax rates are:
Gross income Tax Effective Rate
30,000 0 00.0%
60,000 7,500 12.5
90,000 15,000 16.7
120,000 22,500 18.8
150,000 30,000 20.0
... ... ...
P-)
A good and useful analysis, but we're barking up the wrong tree!
It's all so clear!
This shows who is *not* getting screwed
Very Flawed Marxist Logic
Very Flawed Marxist Logic
tax rates
Taxes
I don't get it.
There is no country that has
Most of these countries in
comments on Drum's tax article
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