The Tax Cuts and Jobs Act: What Did It Mean for You?

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The Tax Cuts and Jobs Act (TCJA) was signed into law by President Donald Trump in 2017 and took effect in 2018. We've had a few years to grapple with all its changes and implications, and determine what it means to each of our personal financial situations, but some taxpayers are still scratching their heads.

Here are some of the key pieces to help the average taxpayer sort through it all.

Standard Deduction

The standard deduction nearly doubled under the TCJA. The standard deduction for individuals was $6,350 and $12,700 for married couples filing jointly for tax year 2017, the last before the TCJA took effect.

In addition to this increase, the standard deduction increases every year to keep up with inflation. It's $12,950 for single filers and married taxpayers filing separately in the 2022 tax year, $25,900 for married couples filing jointly, and $19,400 for head of household filers.

Tax Brackets

There are still seven brackets, but most tax rate percentages were reduced and each bracket now accommodates slightly more earnings.

If you earned $35,000 under the 2017 tax system and were single, for example, you would have fallen into a 15% tax bracket. That dropped to 12% in 2018 under the TCJA. If you earned $75,000, you would have paid 25%. That went down to 22%. At $100,000, you would have paid 28% in taxes, and this was reduced to 24%.

The tax bracket for the very highest earners, those with incomes of more than $418,400, was 39.6% in 2017. It dropped to 37% under the TCJA.


The income levels for each tax bracket change each year. The top tax bracket (37%) applies to income over $539,900 for single filers in the 2022 tax year.

Who Benefited?

The Tax Policy Center indicated in 2018 that the TCJA would reduce taxes “on average” for all income groups, and the Tax Foundation said the same thing.

The keyword here is “average.” Some taxpayers may fare a little worse, while some may fare better. It's important to keep in mind that tax brackets and rates are percentages.

A taxpayer who earns $100,000 and sees a 4% reduction in their effective tax rate would realize a far greater dollars-and-cents increase—$4,000—in after-tax income than a low-income taxpayer earning only $10,000 a year and seeing the same 4% reduction of just $400. It's all relative.


Effective tax rates (the actual percentage of income paid in taxes) dropped from 8.7% in 2017 to 7.1% in 2018 for those with incomes in the $50,000 to $75,000 range after implementation of the TCJA, according to the Tax Foundation.

Here is a quick overview of how much taxpayers in each income group saved under the bill.

Low-Income Earners

Low income earners, those making $25,000 or less, saw a 0.3% increase in after-tax income.

Middle-Income Earners

Those with incomes between $49,000 and $86,000 enjoyed an increase of about 1.4%, or an additional $800 a year or so in after-tax income, according to the Tax Policy Center. The Tax Foundation estimated that the “bottom” 80% of American earners, including low-income and middle-income households, would see an increase in after-tax income of anywhere from 0.8% to 1.7%.

High-Income Earners

The highest-income earners, those taking home between $308,000 and $733,000 a year. saw an additional $11,200 in after-tax take home, on average. The top 1% of earners (those making more than $733,000 a year) cut nearly $33,000 (2.2%) from their tax bill. The Tax Foundation was more conservative in its estimates on the effects on high-income earners and put the number at only 1.6%.

Itemizing Deductions Became Less Lucrative

The 2018 tax bill made changes to several itemized deductions and this affected taxpayers who have historically itemized rather than claiming the standard deduction. In addition to changing what could be itemized, the TCJA substantially increased the standard deduction, so even if you could itemize the same deductions, it might not be worthwhile to do so under the TCJA.


The number of taxpayers who itemized their deductions dropped from 30% in 2017 to just 10% in 2018.

On the flip side are those taxpayers whose total itemized deductions typically exceeded even the new standard deduction amount. If that was you, you might be among the taxpayers who were actually hurt by this legislation.

If you found that the TCJA increased your tax liability, check the following circumstances to learn some possible reasons why.

How Much Is Your Home Mortgage?

The mortgage interest itemized deduction is now capped at mortgage values of $750,000 instead of $1 million. Unless you have a very expensive home, this shouldn’t affect you. In early 2019, Experian calculated that the average mortgage debt was $202,284. There’s still a whole lot of room between that average and the TCJA's cap.

Interest on Refinance Loans

The home interest mortgage deduction used to cover both acquisition debt (mortgages taken out to purchase or build a home) and equity debt (when you refinance and take some cash out of your home’s value to spend on other things, such as your child’s college education). The TCJA eliminated the provision for equity debt. You're no longer able to claim the interest on refinance loans as a tax deduction unless you use the proceeds to "buy, build, or substantially improve" a home.

The State and Local Tax Deduction

The deduction for state and local taxes wasn't entirely eliminated. Instead, it was capped at $10,000. That limit applies to all state and local taxes (SALT), including any sales, income and property taxes a taxpayer faces in their home state.

If you had been paying and deducting more than $10,000 a year in state and local taxes, this would be a negative aspect of the TCJA for you. According to the Tax Policy Center, taxpayers with a tax benefit from the SALT deduction fell from about 25% in 2017 to 10% in 2018.

The Medical Expense Deduction 

The itemized deduction for medical expenses actually improved under the TCJA, at least temporarily. This deduction includes out-of-pocket uncovered medical costs, deductibles, co-pays, and insurance premiums that are not reimbursed by your employer.

The deduction used to be limited to expenses that exceeded 10% of your adjusted gross income (AGI). That dropped to 7.5% in 2017 and 2018, and later legislation extended the tax break through 2020. The 7.5% threshold was made permanent by the Consolidated Appropriations Act 2021.

The Alimony Adjustment

Alimony payments were an "above the line" adjustment to income on the first page of Form 1040 before TCJA. You could subtract alimony payments you made from your taxable income, then claim either the standard deduction or itemize your deductions, as well. Meanwhile, your ex had to claim that alimony as income and pay taxes on it. 

Now, under the terms of the TCJA, you have to pay taxes on the portion of your income that you sent to your ex as part of an alimony settlement. As for your ex, they get to collect that income tax free.


The alimony adjustment only applies to divorces and divorce agreements finalized after Dec. 31, 2018.

Those Lost Personal Exemptions

Personal exemptions were dollar amounts that taxpayers could deduct from their taxable incomes for themselves and each of their dependents: $4,050 per person as of the 2017 tax year. The TCJA suspended these exemptions through at least 2025.

However, single taxpayers with no children likely came out ahead after the change with the TCJA's significant increase to the standard deduction. Large families with many children, on the other hand, might have seen a tax increase after losing the exemption for each child.


The effect of the elimination of exemptions on large families was balanced somewhat by the altered tax brackets.

The Expanded Child Tax Credit

The Center on Budget and Policy Priorities has consistently argued that the TCJA's changes to the Child Tax Credit, despite appearing generous, didn't serve the lowest-income families.

The true impact of this tax credit has always been tricky to calculate. Technically, it’s nonrefundable, so all it could do was eliminate any tax bill you might have owed. But there was a tack-on: the Additional Child Tax Credit. This would allow a portion of the credit to become refundable, so after it erased your tax bill, you could expect to receive a check from the IRS for part of the balance.

The nonrefundable part of the old tax credit was $1,000 per child. The TCJA amped that up to $2,000, and it made up to $1,400 of that amount refundable while eliminating the "extra" Additional Child Tax Credit. However, the refundable portion of the credit is 15% of a taxpayer’s or family’s earnings over $2,500, up to the $1,400 limit. That means lower-income families won't benefit as much from this tax break. A single mom earning $10,000, for example, doesn't have enough income to qualify for the full $1,400 refundable part of the credit.


Under President Joe Biden's American Rescue Plan, the Child Tax Credit was increased to $3,000 for each child over the age of 6 and $3,600 for children under 6 years old. Families with an income of $150,000 (married filers; $112,000 for single-parent families) automatically qualified for the credit. This increase was only for the year 2021 and has since expired.

Meanwhile, high-income families benefit from the new rules. They used to be unable to claim this tax credit because they earned too much, but the TCJA expanded the income limits. Now, many high earners can take advantage of it.

The TCJA Is Not Forever

These are just a few of the many tax rules that changed under the TCJA, but there's an important caveat to all of these issues: the Tax Cuts and Jobs Act is not permanent. Many of the provisions, if not most of them, are scheduled to expire or “sunset” on Dec. 31, 2025 unless Congress renews them or otherwise haggles out a whole new tax bill before then. 

The Tax Cuts and Jobs Act is expected to cost the government nearly $1.5 trillion in lost revenues, according to the Tax Foundation. Barring changes elsewhere in the tax code, that means the cuts probably are not sustainable over the long haul. So, stand by and get ready to revisit this issue no later than 2025.

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  1. Internal Revenue Service. "Tax Reform Basics for Individuals and Families."

  2. Internal Revenue Service. "Taxpayers Can Choose to Itemize or Take Standard Deduction for Tax Year 2017."

  3. Internal Revenue Service. "IRS Provides Tax Inflation Adjustments for Tax Year 2022."

  4. Tax Foundation. "2017 Tax Brackets."

  5. Tax Foundation. "Preliminary Details and Analysis of the Tax Cuts and Jobs Act."

  6. Tax Policy Center. "Analysis of the Tax Cuts and Jobs Act."

  7. Tax Foundation. "A Preliminary Look at 2018 Tax Data."

  8. Tax Policy Center. "The Effect of the TCJA Individual Income Tax Provisions Across Income Groups and Across the States," Page 2.

  9. Tax Foundation. "Preliminary Details and Analysis of the Tax Cuts and Jobs Act," Page 11.

  10. Internal Revenue Service. "Interest on Home Equity Loans Often Still Deductible Under New Law."

  11. Experian. "Mortgage Loan Debt Increases For the Seventh Straight Quarter."

  12. Internal Revenue Service. "With New SALT Limit, IRS Explains Tax Treatment of State and Local Tax Refunds."

  13. Tax Policy Center. "How did the TCJA change the standard deduction and itemized deductions?"

  14. National Council of State Legislators. "FY 2021 Omnibus Appropriations Bill."

  15. American Bar Association. "Tax Reform Could Make Divorce a Whole Lot More Taxing."

  16. Tax Policy Center. "What Are Personal Exemptions?"

  17. Center on Budget Policies and Priorities. "Accessed 2017's Tax Law's Child Credit: A Token or Less-Than-Full Increase for 26 Million Kids in Working Families."

  18. Tax Policy Center. "How Did the TCJA Change Taxes of Families With Children?"

  19. White House. "The Child Tax Credit."

  20. Tax Foundation. "Tax Cuts and Jobs Act (TCJA)."

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