child tax credit

Recently there has been some discussion in the Presidential race about the taxation of parents vs. childless taxpayers. The discussion has been ongoing, but it was kicked up again when a 2021 video of J.D. Vance resurfaced where he said that taxpayers with children should be lower tax rates than those without children. There was some political back-and-forth about this idea, much of it tied up in the framing of the issue, with the usual bad faith on both sides about the fundamental issue (in short: most Democrats and a small but growing number of Republicans support increasing the size of the Child Tax Credit).

Let’s leave the politicking aside for a moment and focus on policy. As many pointed out in response to Vance’s idea, we already do this. In fact, we have almost always done this in the history of the US income tax — “this” meaning giving taxpayers at least some break for having kids. For most of the 20th century, this was done through personal exemptions which usually included some tax deduction for children, and later in the century the Child Tax Credit was added (after 2017, the exemptions were eliminated in favor of a large CTC). Other features of the tax code also make some accounting for the number of children, most notably the size of the Earned Income Credit.

The chart below is my attempt to show how the tax breaks for children have affected four sample taxpaying households. What I show here is sometimes called the “zero bracket” — that is, how much income you can earn without paying any federal income taxes. The four households are: a single person with no children, a married couple with no children, a single person with two children (“head of household”), and a married couple with two children. All dollar amounts are inflation-adjusted to current dollars

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Last week I wrote about the Simpsons’ mortgage payment. In short, I found that using a reasonable assumption of Homer’s income, the median housing price, and the rate of interest, the Simpsons are likely paying less of their household budget on housing today than in the 1990s.

But what about the family’s taxes? Are they getting squeezed by the taxman? Taxes are referenced throughout The Simpsons series. Here’s an article that collects a lot of the references. And that makes sense: the Simpsons are a normal American family, and normal American families love to complain about taxes.

Using the same reasonable assumption about Homer’s income from last week’s post (that Homer earns a constant percentage of a single-earner family, rather than merely adjusting for inflation), we can calculate the family’s average tax rate and how it has changed over the year. Conveniently, “average tax rate” is just economist speak for “how much of your family’s budget goes to the government.”

First, let’s just look at the federal income tax, since this is where most of the changes happen. Don’t worry, I’ll add in payroll taxes below, though this is a constant percent of the family’s budget since it is a flat tax on income!

The chart below shows the average tax rate the Simpsons paid for their federal income taxes. I didn’t go through every year, because: a) it’s a lot of work (I’m doing each year manually); and b) it’s more interesting to look at years right after or before major changes in the tax code. So no cherry picking here — the years selected are picked to tell a mostly complete story.

I’ll now briefly explain each of the years chosen, and what changes in the tax code impacted the Simpsons. But as you can see, just like their mortgage payment, the Simpsons are now spending less of their household income on federal income taxes (don’t worry, the trend is similar with payroll taxes included). In fact, they are now getting a net rebate from the federal government, and have been since the late 1990s!

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