OpenThe IRS has issued regulations on the new 20% deduction for qualified business income (QBI) created by the TCJA, also known as the pass-through deduction. Here’s a summary of the basic rules:

For tax years beginning after Dec. 31, 2017, taxpayers other than corporations may be entitled to a deduction of up to 20% of their qualified business income (QBI) from a domestic business operated as a sole proprietorship, or through a partnership, S corporation, trust or estate. This deduction can be taken in addition to the standard or itemized deductions. In general, the deduction is equal to the lesser of:

A. 20% OF QBI PLUS 20% OF QUALIFIED REAL ESTATE INVESTMENT TRUST (REIT) DIVIDENDS AND QUALIFIED PUBLICLY TRADED PARTNERSHIP (PTP) INCOME, OR

B. 20% OF TAXABLE INCOME MINUS NET CAPITAL GAINS.

QBI generally is the net amount of qualified items of income, gain, deduction, and loss, from any qualified trade or business. But QBI doesn’t include capital gains and losses, certain dividends and interest income, reasonable compensation paid to the taxpayer by any qualified trade or business for services rendered for that trade or business, and any guaranteed payment to a partner for services to the business. Generally, the deduction for QBI can’t be more than the greater of:

A. 50% OF THE W-2 WAGES FROM THE QUALIFIED TRADE OR BUSINESS; OR

B. 25% OF THE W-2 WAGES FROM THE QUALIFIED TRADE OR BUSINESS PLUS 2.5% OF THE UNADJUSTED BASIS OF CERTAIN TANGIBLE, DEPRECIABLE PROPERTY HELD AND USED BY THE BUSINESS DURING THE YEAR FOR PRODUCTION OF QBI.

But this limit on the deduction for QBI doesn’t apply to taxpayers with taxable income below a threshold amount ($315,000 for married individuals filing jointly, $157,500 for other individuals, indexed for inflation after 2018), with a phase-in for taxable income over this amount. A qualified trade or business doesn’t include performing services as an employee.

Additionally, a qualified trade or business doesn’t include a trade or business involving the performance of services in the fields of health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, investing and investment management, trading, dealing in certain assets or any trade or business where the principal asset is the reputation or skill of one or more of its employees. This exception only applies if a taxpayer’s taxable income exceeds $315,000 for a married couple filing a joint return, or $157,500 for all other taxpayers; the benefit of the deduction is phased out for taxable income over this amount.

The IRS’s new regulations explaining the 20% deduction for QBI are highly detailed and complex. A sampling of the important guidance contained in the guidance follows:

Partnership guaranteed payments are not considered attributable to a trade or business and thus do not constitute QBI.

To the extent that any previously disallowed losses or deductions are allowed in the tax year, they are treated as items attributable to the trade or business for that tax year. But this rule doesn’t apply for losses or deductions that were disallowed for tax years beginning before Jan. 1, 2018; they are not taken into account for purposes of computing QBI in a later tax year.

Generally, a deduction for a net operating loss (NOL) is not considered attributable to a trade or business and therefore,is not taken into account in computing QBI. However, to the extent the NOL is comprised of amounts attributable to a trade or business that were disallowed under a specialized excess business loss limitation for noncorporate taxpayers, the NOL is considered attributable to that trade or business.

Interest income received on working capital, reserves, and similar accounts is not properly allocable to a trade or business. In contrast, interest income received on accounts or notes receivable for services or goods provided by the trade or business is not income from assets held for investment, but income received on assets acquired in the ordinary course of trade or business.

The 20% deduction for QBI does not reduce net earnings from self-employment or net investment income under the rules for the 3.8% surtax on net investment income.

Where a business (or a major portion of it, or a separate unit of it) is bought or sold during the year, the W-2 wages of the individual or entity for the calendar year of the acquisition or disposition are allocated between each individual or entity based on the period during which the employees of the acquired or disposed-of trade or business were employed by the individual or entity.

The rule generally barring a health services business from being a qualified trade or business doesn’t include the provision of services not directly related to a medical field, even though the services may purportedly relate to the health of the service recipient. For example, the performance of services in the field of health does not include the operation of health clubs or health spas that provide physical exercise or conditioning to their customers, payment processing, or research, testing, and manufacture and/or sales of pharmaceuticals or medical devices.

The rule generally barring the performance of services in the field of actuarial science from being a qualified trade or business does not include the provision of services by analysts, economists, mathematicians, and statisticians not engaged in analyzing or assessing the financial costs of risk or uncertainty of events.

The rule barring consulting from being a qualified trade or business doesn’t apply to consulting that is embedded in, or ancillary to, the sale of goods if there is no separate payment for the consulting services. For example, a company that sells computers may provide customers with consulting services relating to the setup, operation, and repair of the computers, or a contractor who remodels homes may provide consulting prior to remodeling a kitchen.