---
title: Why I Dumped My Tax-Free Money-Market Fund—and You Should, Too!
description: Not paying taxes to Uncle Sam is a great thing. But when it comes to tax-free money market funds these days, you might want to reconsider.
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  - name: Allan Sloan
    url: https://money.com/author/allan-sloan/
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      - Personal Finance
      - Retirement
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published: '2016-03-24T17:43:37.000Z'
modified: '2024-04-16T10:23:21.000Z'
section: Taxes
tags:
  - income investing
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type: Article
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![Uncle Sam holding wallet](https://img.money.com/2016/03/160324_taxfree_01.jpg)

I love tax-exempt income. It’s nice to be able to keep your interest and dividends from assets like municipal bonds or tax-exempt money-market funds rather than having to share the proceeds with the IRS and state and local governments.

But recently, I moved a serious slug of money out of tax-free money funds into taxable funds. It’s not that I suddenly decided the time had come to pay more to Uncle Sam. It’s that, at least for now, the difference in yields between taxable funds and tax-free funds is compelling. Even taking taxes into account.

When I looked at my portfolio earlier this month, I realized that the tax-exempt money funds in my regular accounts were yielding about 0.02 of 1%, while the taxable money funds in my retirement accounts were paying around 0.4 percent.

That’s right, my taxable funds (on which I don’t pay current tax because income on retirement accounts is tax free until I take the money out) were yielding 20 times as much as my tax-free funds.

I’m embarrassed to say that I discovered this largely by accident. I was looking at my accounts in early March, shortly after my monthly money-market fund dividends posted, and realized that my retirement-account money funds had paid much larger (albeit still small) dividends for February than my regular money fund accounts, which have much higher balances.

So I looked at the yields for the money funds in my family’s portfolio to see what was going on. Then I did a little research.

It turns out that, unnoticed by me, rates on so-called “prime” money funds and Treasury and federal money funds had begun rising around Thanksgiving. Meanwhile rates on tax-exempt funds stayed around 0.01% or 0.02% for various technical reasons.

I switched my non-retirement money fund assets out of the tax-free accounts into a federal money fund that owns Treasury securities and securities of federally-guaranteed issuers.

The math was simple. Leaving money in tax-free money funds produces 0.02% after taxes. Putting it into a taxable federal money fund yielding 0.3% gives me an after-tax yield of about 0.2%. That’s 10 times as much.

I could have put the money into a prime fund yielding 0.4%, but decided not to. Federal fund dividends are partially exempt from the stiff income tax I pay in New Jersey, while prime fund dividends aren’t. So why take even the slightest risk to gain a very small extra return?

QUIZ: [How Smart Are You About Saving For Retirement?](https://money.com/saving-for-retirement-quiz/)

If you own tax-free money market funds, you might want to consider doing what I’ve done, and switch to a taxable fund. Just make sure that you’re not switching into one of the taxable funds still yielding less than 0.1 of one percent.

Paying Uncle Sam (and maybe a state and local government, as well) isn’t fun. But earning lots more after taxes by owning a taxable fund than you’re earning with a tax-free fund…well, that’s certainly enjoyable, even if you have to give tax collectors a piece of t action.

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