Biden’s Tax Plan Could Make ‘Marriage Penalty’ Worse
“Are we better off single?” That’s what some high-earning couples may be asking themselves if Congress acts on President Biden’s tax proposal. Here’s why.

Getting married is likely one of the biggest life decisions you will make, and while it may seem like an easy one, it could just have gotten a little more complicated. In addition to the obvious selection and reflection of a life with a future spouse, and all the family, friends and other things that come with it, there may now be a new consideration to add to the mix: Uncle Sam. That’s because the so-called “marriage penalty” may have just gotten larger for high-earning dual-income households.
Under the recently released so-called “Green Book,” which contains the Department of Treasury’s tax-related proposal for the Biden administration, is a proposal to increase the top marginal income tax rate from the current 37% to 39.6%. This is similar to previous tax increase proposals by President Biden. Specifically, the Green Book provides that the increase, as applied to taxable year 2022, will impact those with taxable income over $509,300 for married individuals filing jointly and $452,700 for unmarried individuals. However, because of the way our tax system and tax brackets work, some married couples who each earn under $452,700 would be subject to a higher tax, as compared to their single counterparts earning the same amount. In this instance, being unmarried and single is better — for tax purposes anyway.
Married vs. Single: Do the Tax Math
The reason for this dichotomy is because we have different tax brackets for single filers and married filers. Assume you have a couple (not married) each making $452,699. These taxpayers would not have reached the highest bracket for an unmarried individual per the Green Book proposal. Each individual would be taxed at the 35% bracket, resulting in approximately $132,989 in federal income taxes using this year’s tax bracket for single filers (or a total of $265,978 combined for both individuals).

Sign up for Kiplinger’s Free E-Newsletters
Profit and prosper with the best of expert advice on investing, taxes, retirement, personal finance and more - straight to your e-mail.
Profit and prosper with the best of expert advice - straight to your e-mail.
If instead this couple decides to marry, they will now have a combined income of $905,398, putting them in the highest tax bracket (39.6%) as married filing jointly. This translates to an estimated $284,412 in federal income tax, which is $18,434 more in taxes (or about 6.9%) than compared to a situation if they were single, according to a projected tax rate schedule we created based on the available federal income tax information.
There is another option for married couples: the filing status of “Married Filing Separately.” In this situation, the couple may file as “single” for tax purposes but must use the “Married Filing Separately” rate table, which for the vast majority of situations, when you do the math, does not yield a better result.
The Effect, Going Forward
If the changes, as currently proposed, pass, I am anticipating a lot of tax planning around filing status and income threshold management. Accountants will be very busy with detailed analyses and projections to evaluate the optimal filing status for married couples, and where certain deductions or planning opportunities would be more beneficial if applied to one spouse over the other.
In extreme cases, could this factor into one’s marital decision? While I certainly hope that we do not make life decisions around taxes, the reality is that taxes hit the bottom line, and that impact is real.
No one has a crystal ball as to what will happen, but let’s hope that in the end, this doesn’t become an unforeseen factor in the increasing divorce rate we have already seen since the start of the pandemic. Let’s hope for marital bliss, not marital dismiss.
As part of the Wilmington Trust and M&T Emerald Advisory Services® team, Alvina is responsible for wealth planning, strategic advice, and thought leadership development for Wilmington Trust’s Wealth Management division.
©2021 M&T Bank Corporation and its subsidiaries. All rights reserved.
Wilmington Trust is a registered service mark used in connection with various fiduciary and non-fiduciary services offered by certain subsidiaries of M&T Bank Corporation. M&T Emerald Advisory Services and Wilmington Trust Emerald Advisory Services are registered trademarks and refer to this service provided by Wilmington Trust, N.A., a member of the M&T family.
This article is for informational purposes only and is not intended as an offer or solicitation for the sale of any financial product or service. It is not designed or intended to provide financial, tax, legal, investment, accounting or other professional advice since such advice always requires consideration of individual circumstances. Note that tax, estate planning, investing and financial strategies require consideration for suitability of the individual, business or investor, and there is no assurance that any strategy will be successful.
Get Kiplinger Today newsletter — free
Profit and prosper with the best of Kiplinger's advice on investing, taxes, retirement, personal finance and much more. Delivered daily. Enter your email in the box and click Sign Me Up.

Alvina Lo is responsible for family office and strategic wealth planning at Wilmington Trust, part of M&T Bank. Alvina was previously with Citi Private Bank, Credit Suisse Private Wealth and a practicing attorney at Milbank, Tweed, Hadley & McCloy, LLC. She holds a B.S. in civil engineering from the University of Virginia and a JD from the University of Pennsylvania. She is a published author, frequent lecturer and has been quoted in major outlets such as "The New York Times."
-
Think a Repeal of the Estate Tax Wouldn't Affect You? Wrong
The wording of any law that repeals or otherwise changes the federal estate tax could have an impact on all of us. Here's what you need to know, courtesy of an estate planning and tax attorney.
-
In Your 50s? We Need to Talk About Long-Term Care
Many people don't like thinking about long-term care, but most people will need it. This financial professional recommends planning for these costs as early as possible to avoid stress later.
-
Social Security Pop Quiz: Are You Among the 89% of Americans Who'd Fail?
Shockingly few people have any clue what their Social Security benefits could be. This financial adviser notes it's essential to understand that info and when it might be best to access your benefits.
-
Such Attractive Yields in High-Grade Munis Are Rare and May Not Last Long
According to this munis expert, the last time munis were this cheap was a brief period in 2023. If you kicked yourself for missing out then, you have a second chance now.
-
Financial Analyst Sees a Bright Present for Municipal Bond Investors
High-tax-bracket investors have an excellent opportunity to secure low-volatility, high-quality returns at yield levels rarely seen in over a decade.
-
I'm an Insurance Pro: How Not to Get Dumped by Your Insurance Agent
Your insurance agent or broker might show you the door if you do any of these five things. Being a good customer is about more than paying your bill on time.
-
Two Estate Planning Issues You Should Never Overlook
This estate planning attorney explains why proper asset titling and beneficiary designations make a big difference when it's time to transfer your wealth.
-
The Four D's That Could Force You to Sell Your Business
Business owners (or their heirs) can be rushed into a sale of their company if they haven't planned for a major change in circumstances — or the four D's.