Impact of the New Tax Law

Tax Rates Are Reduced

Under the rules in effect prior to 2018, seven income tax rates apply to individuals: 10%, 15%, 25%, 28%, 33%, 35%, and 39.6%. The new tax law retains seven tax rates, but modifies them as follows: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. As under the prior law, rates increase with taxable income, and the income ranges for each bracket vary depending on filing status (single, married filing jointly/surviving spouse, married filing separately, or head of household).

Changes to the income tax brackets will lower the rates at many income levels. Here are a couple of general examples. A married couple filing jointly with taxable income of $85,000 in 2018 will have a marginal tax rate of 22% under the new law, compared with 25% under the prior law. A married couple filing jointly whose taxable income in 2018 is $250,000 will have a marginal tax rate of 24% under the new law, compared with 33% under the prior law.

The income levels affected by each tax rate will be adjusted annually for inflation. However, the new brackets are currently set to expire after the 2025 tax year.

Your Taxable Income Is Likely to Change

In addition to lowering the tax rates applied to your taxable income, the new law also modifies how taxable income is calculated. Here are some of the changes:

Under the new law, many more taxpayers are expected to find that claiming the standard deduction is more valuable than itemizing deductions, simplifying their filing tasks. Others may find that their itemized deductions have been substantially limited, particularly people who live in places with relatively high state and local taxes and housing costs.

The four changes listed above are set to expire after the 2025 tax year.

Future IRS Inflation Adjustments Will Be Smaller

Under the prior law, the IRS used the Consumer Price Index for "all-urban consumers" (CPI-U) to adjust various thresholds and limits each year to compensate for inflation. Under the new law, the IRS will use the so-called chained Consumer Price Index (chained CPI-U) instead.

CPI-U assumes that consumers buy the same things in the same amounts year after year and do not alter their behavior when prices change. Chained CPI-U assumes that consumers do shift their preferences to less costly alternatives. The differences between the indexes appear small from year to year, but over longer periods of time, chained CPI-U is expected to show noticeably less inflation than CPI-U. That is expected to reduce the amount of inflation indexing applied to tax brackets, deductions, and credits.

The new law makes this change permanent.

The Alternative Minimum Tax Lives On, But With Less Punch

The floor for triggering the alternative minimum tax has been raised. For married couples filing joint returns, the exemption is now $109,400 -- up from the previously-scheduled exemption of $86,200. For those filing as single taxpayers, the new exemption amount is $70,300 -- up from $55,400. Additionally, the income levels at which the exemption is phased out have increased.

These changes are set to expire after 2025.

Other Changes to Note

Please keep in mind that this is a summary of selected highlights and should not be considered tax advice. To fully understand how the new tax laws affect your situation, please consult a qualified tax professional.