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Qualified Business Income Deduction (20% Deduction for Certain Pass-Through Income)

The Tax Cuts and Jobs Act included a provision that may allow an individual to deduct 20% of their domestic qualified business income from a partnership, S Corporation or sole proprietorship (Schedule C or F). This provision is in effect for tax years 2018 – 2025.

For the vast majority of taxpayers (90%) this deduction is calculated as the lesser of:

  • 20% of their net business income or
  • 20% of their taxable income excluding capital gains

This means that for most taxpayers, the deduction is calculated based on the Simplified Worksheet on page 37 of the 2018 Form 1040 instructions.

For the remaining 10% of taxpayers whose income exceeds $157,500 ($315,000 for joint filers) the deduction will be limited as follows:

  • For “specified service businesses” the deduction begins to be phased out once the income limit is reached.
    • Specified Service business is defined on page 34 of the 2018 Form 1040 instructions.
  • For all other businesses the deduction is limited to:
    • 50% of the W-2 wages paid by the business or
    • 25% of the W-2 wages paid by the business plus 2.5% of the unadjusted basis of all qualified property

For these taxpayers the deduction is calculated based on worksheets in the newly revised draft 2018 IRS Publication 535 (Qualified Business Income Deduction).

See the Business owners can claim a qualified business income deduction page on the IRS website for more information.

Mark Castro, CPA

Mark Castro, CPA

Mark has been with CrossLink Professional Tax Solutions (CPTS) since 2008, but has been in the tax industry since 1990. As the government/tax industry liaison for CPTS, Mark has been very active in working with the IRS, States, and other tax industry members to help improve communications, promote standardization, and simplification of eFile systems. Mark has also been active with industry associations as a board member of the National Association of Computerized Processors (NACTP) and the Council of Electronic Revenue Communication Advancement (CERCA) for many years. These two associations work with the IRS and States to help solve key eFile and electronic tax system issues and work to improve the operations of the State and IRS eFile systems.
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Recent Tax Updates