The TCJA: Key Facts on the 2017 'Trump Tax Cuts' and What's Extended for 2025

The Tax Cuts and Jobs Act (TCJA) became effective more than seven years ago as a major Trump administration tax code overhaul.

Before the recently so-called "One Big Beautiful Bill" (OBBB), the TCJA was the biggest change to tax law and policy in recent decades. (That's why the TCJA is also known as the "Trump tax cuts.")

Extending the expiring TCJA provisions in the OBBB affects millions of taxpayers across the U.S. since its provisions cover everything from changes to the standard deduction and the child tax credit to income tax rates and even the availability and amounts of other popular tax credits and deductions.

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While many key TCJA provisions were extended in the OBBB, some were not. For instance, certain individual Alternative Minimum Tax (AMT) phaseout limits reverted to 2018 levels.

We’ll cover what the TCJA is, several provisions that remain, and how it all might impact your household.

TCJA Explained

What is the TCJA?

The TCJA was a sweeping tax overhaul that reduced tax rates, changed processes, and restructured individual and corporate tax frameworks.

As mentioned, the law, enacted in 2017, is also known as the "Trump tax cuts" because it was a signature piece of legislation in Trump's first term as president.

Several significant tax changes are in the TCJA, but a major one was a temporary reduction in individual federal income tax rates.

Tax Rates

TCJA income tax changes

Almost every U.S. taxpayer was affected in some way by the TCJA. Below are a few highlights from the tax rates and the bracket changes tied to them. We’ll use the data to illustrate examples of the 2017 law’s impact.

Source: Tax Policy Center. The tax bracket income thresholds here compare 2018 prior and post-TCJA amounts to show the immediate impact of the TCJA on tax brackets.

Federal income tax brackets are adjusted annually for inflation, so these comparisons don't reflect current federal income tax brackets for the 2025 tax year.

As shown above, a single filer with income above $38,700 before the TCJA was enacted would have been subject to a 25% federal tax rate. The year following the TCJA's enactment, that same income level was instead subject to a 22% tax.

Another example from above is a married, filing jointly couple with income above $480,050 before the TCJA was enacted would have been subject to a 39.6% marginal federal tax rate. The year after the TCJA was signed into law, those earnings were instead subject to a 35% tax.

Note: Remember that the above examples merely illustrate the immediate impact of the change in tax rates from 2017 to 2018. Since federal tax brackets are adjusted yearly for inflation, the income tax brackets for 2025 are not reflected in that chart. For more information, see 2025 Federal Tax Brackets and Income Tax Rates.

Most tax rates were reduced under TCJA. However, the lowest tax rate of 10% was not. Taxpayers in the lowest bracket before and after the TCJA could have been subject to a 10% tax.

Households earning $450,000 or more received about 45% of benefits from the TCJA. As you can see from the above examples, under the TCJA, those with higher incomes generally saved more on taxes than taxpayers with lower incomes.

Note: In the newly enacted OBBB, the post-TCJA federal income tax bracket schedule and lower rates were made permanent.

Child Tax Credit

TCJA child credit changes

The TCJA also cut personal exemptions and expanded the federal child tax credit (CTC). That meant families could no longer take the personal and dependent exemption, which was $4,050 (indexed for inflation).

And under the newly signed OBBB law, the elimination of the personal and dependent exemption is permanent.

Before the TCJA, 292.7 million people claimed personal and dependent exemptions. Total taxpayer savings were in the billions, so individuals could potentially see a reduction in savings with permanent termination.

However, a higher CTC amount, which used to be $1,000, pre-TCJA, has become permanent under the OBBB.

• The new CTC amount under the OBBB is $2,200 per child.
• The tax law also indexes the credit amount for inflation yearly, starting in 2026.
• The qualifying child’s age for this credit remains at 17 and under (pre-TCJA allowed a credit for children 16 and under).

As Kiplinger previously reported, data show that poverty levels can decrease when families benefit from an expanded CTC. But it hasn’t ended there.

The OBBB also maintains the increased income phase-out thresholds, the nonrefundable, non-child dependent credit, and leaves the refundable part of the child tax credit at $1,700.

For more information, check out Kiplinger's report, Three Major Changes Coming to Parents Under the Trump Megabill.

Note: The TCJA also changed the child tax credit requirements regarding Social Security numbers (SSN). Before, a qualifying child didn’t have to have an SSN. After, children without eligible SSNs couldn’t qualify for the full credit. Under the OBBB, a child's and his or her parents' SSNs are required to claim the credit.

Related: Child Tax Credit Increase Under Trump.

Standard Deduction

TCJA doubled standard deduction

The TCJA almost doubled the baseline federal standard deduction.

When the TCJA was enacted, the standard deduction jumped from $6,500 to $12,000 (single filer). For married, filing jointly filers, the standard deduction increased from $13,000 to $24,000. The standard deduction is indexed annually for inflation.

Some bipartisan organizations suggest that the larger standard deduction offered by the TCJA leads to a progressive tax rate (a rate that increases as taxable income increases). This would mainly benefit middle-class and low-income households.

According to the Center for Economic and Policy Research (CEPR), studies have shown that more people with $200,000 or less in income took the standard deduction when the TCJA was first enacted. However, it should also be noted that data show most people took the standard deduction before the TCJA.

Under the recently signed OBBB, the raised standard deduction amounts are made permanent and further increased with an extra year of inflation adjustment.

For tax years 2025, the bill increases the standard deduction by the following amounts:

• Single filers get an extra $750
• Married, filing jointly couples receive an extra $1,500
• Head-of-household filers get an additional $1,125

For information about the current standard deduction, see How Does the Standard Deduction Work?

SALT Cap

New SALT Cap Limit under TCJA and OBBB Changes

The TCJA also limited the amount of state and local tax (SALT) you could deduct. The SALT deduction includes property tax and other taxpayer liabilities already taken out for state and local services.

Pre-TCJA, the deduction was limitless; after the law was enacted, you could only deduct up to $10,000 of your state and local taxes. This mainly affected those with high-worth homes or state and local taxes in high-cost areas, such as New York, New Jersey, or California.

For example, homeowners could no longer itemize the full amount they pay in state, local, and property taxes if they pay more than $10,000. This meant those taxpayers saw fewer benefits.

However, the OBBB includes a provision temporarily raising the SALT cap to $40,000.

• The cap will increase by 1% annually from 2026 through 2029.
• Starting in 2030, the SALT cap will expire and revert to the $10,000 TCJA limit.
• Those with modified adjusted gross income (MAGI) above $500,000 or more are subject to a phaseout ($250,000 if married filing separately).

There was much debate before the OBBB's temporary raise on the SALT cap was made final.

Rep. Nick Lalota (R-N.Y.), an outspoken critic of the SALT cap, told Politico that the tax bill was "dead effectively on the floor" under the original $10,000 the GOP proposed. Other Republicans representing high-tax districts have argued that a later proposed limit of $30,000 was still too low.

This might hint at future negotiations down the road when the $40,000 SALT cap expires in 2030.

For more information, see Kiplinger's report: SALT Deduction 2025: Three Things to Know Now.

Did itemized deductions go away under the TCJA?

The TCJA affected other miscellaneous itemized deductions in the following ways:

• It limited deductible medical expenses and deductible home-equity loan interest. The medical expense limit was later made permanent. The OBBB also made the limit on home-equity loan interest permanent, unless the loan is for buying, building, or substantially improving the home securing the loan.
• Increased the charitable contribution deduction rate from 50% to 60%. The OBBB made this provision permanent.
• Repealed a “Pease” limitation, which reduced itemized deductions based on taxable income above certain thresholds. The OBBB repeals the Pease limitation and replaces it with a new limit on itemized deductions, which applies mostly to taxpayers in the highest income tax bracket.

The TCJA also eliminated the deduction for unreimbursed employee expenses and tax prep fees, for alimony, hobby expenses, and moving expenses (unless you're military), and the deduction for casualty and theft losses, except for certain losses in federally declared disaster areas.

Those "miscellaneous itemized deductions" were permanently removed under the "One Big Beautiful Bill." However, the increased standard deduction in the OBBB might result in a larger tax refund for some taxpayers next year.

For more information, check out Kiplinger's report, Five Ways Trump's 2025 Tax Bill Could Boost (or Shrink) Your Tax Refund.

Alternative Minimum Tax

How the TCJA affected AMT (Alternative Minimum Tax)

The Alternative Minimum Tax (AMT) places a floor on the amount that higher-income taxpayers must pay, regardless of credits or deductions taken on their taxes.

The AMT’s income level and phase-out were raised under TCJA. This meant fewer higher-income people qualified for AMT (which for 2025 applies to taxpayers earning above $239,100). If a taxpayer did qualify, they generally paid less in taxes.

For example, the Tax Policy Center estimated that the number of taxpayers who would have paid AMT the year TCJA was enacted fell by about 5 million. This was big news for people who were subject to what some call a "parallel tax system," which provided the government with about $34 billion in revenue the year before TCJA.

Under the OBBB, certain AMT increased thresholds were made permanent.

For instance, the current exemption amounts have been extended, meaning AMT won't kick in until you meet the post-TCJA limits of $88,100 (single filers) or $137,000 (married, filing jointly, couples).

However, the higher phaseout limits have reverted to pre-TCJA levels. This effectively lowers the phaseouts to $1,000,000 for married filing joint filers and $500,000 for single filers. The rate at which the exemption is phased out has also been increased from 25% to 50% as income increases.

Estate Tax

Estate tax exemption extension

Another benefit for wealthier taxpayers under the TCJA is the doubling of the federal estate tax exemption.

In 2017, instead of paying taxes on estates above $5.6 million, higher-income individuals were not taxed until $11.2 million. The threshold is inflation-adjusted annually, with the current exemption level at $13.99 million.

The recently signed OBBB makes the higher exemption for the estate tax permanent. Not only that, but the law also indexes the estate exemption for inflation and raises the 2026 amounts to $15 million for single filers and $30 million for married couples.

For more information, see Kiplinger's report Big GOP Tax Bill Could Change Your Estate Planning for 2025.

Corporate Tax

Trump corporate tax rate

The TCJA changed taxes for businesses, too. For example, the TCJA cut the corporate income tax (CIT) from 35% to 21%. This was a permanent change.

Though the effect of lower corporate tax rates is debated in economic circles, the Tax Foundation reports that the burden of the CIT falls on consumers. Consequently, a lower CIT might entice companies to raise wages and lower prices for buyers.

Other TCJA changes made for businesses included:

• Created a 20% deduction on qualified business income for some business owners (pass-through entities). The OBBB made this deduction permanent.
• Limited deduction for meals and entertainment expenses (the latter are generally not deductible). The TCJA made this change permanent.
• Largely eliminated tax deductibility of net operating losses (NOL) for businesses. (The TCJA limited the NOL deduction to 80% of taxable income and eliminated most carrybacks.) This provision is permanent.
• Limited business interest expenses. (The OBBB makes a more restrictive calculation of adjusted taxable income (ATI) permanent.)
• Allowed 100% expensing on some business property for specific tax years. (This provision was set to phase out gradually after 2022.) The OBBB allows taxpayers to immediately expense 100% of qualified short-lived property that was placed in service on or after January 20, 2025.

That last point, on expensing business property, concerns depreciation. Normally, business assets are depreciated over their useful life (typically five, 10, or 15 years). Before the TCJA, tax law generally allowed some equipment to be partially expensed, but it was only 40% of qualifying assets.

The OBBB extends the TCJA provision allowing businesses to fully and immediately expense their qualifying short-lived assets placed in service after January 19 and before January 1, 2030. (Other types of property may be subject to a different duration of tax benefits.)

Accelerated depreciation creates a greater tax difference between reportable income (what the stockholders see) and taxable income (what the IRS sees). But this difference is temporary. In later years, when the asset has been fully expensed for tax purposes, but not for reportable income purposes, the business will pay more tax on that asset.

That is why accelerated depreciation might be called a "deferred tax liability." Businesses pay less in taxes now for greater tax liability in the future.

Effectively, immediate expensing allows companies to invest more in the short term. This could create more jobs, boost productivity, and raise wages.

TCJA vs. OBBB

Bottom line: Trump tax bill extends TCJA provisions

Many TCJA cuts became permanent. However, doing so came with a price tag.

The OBBB is estimated to cost about $4.5 trillion over ten years, according to Tax Notes. This significant federal deficit impact could impact your wallet through higher borrowing costs and potential future tax increases, or in other ways.

You might want to get a head start on your 2026 tax planning. Consult with a tax planner to look at your financial situation to see whether any recent tax changes apply to you.

Read More

• Three Popular Tax Breaks Are Gone for Good in 2026
• Trump's ‘One Big, Beautiful Bill’ With Trillions in Tax Cuts
• 2025 Standard Deduction Changes Under New Trump Tax Bill
• The GOP Wants to Auto-Enroll Your Child in a 'Trump Savings Account'