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Business BriefsTax BriefsTax Planning

New Law Eases the Limitation on Business Interest Expense Deductions for 2025 and Beyond

December 17, 2025by admin

Interest paid or accrued by a business is generally deductible for federal tax purposes. But limitations apply. Now some changes under the One Big Beautiful Bill Act (OBBBA) will result in larger deductions for affected taxpayers.

Limitation basics

The deduction for business interest expense for a particular tax year is generally limited to 30% of the taxpayer’s adjusted taxable income (ATI). That taxpayer could be you or your business entity, such as a partnership, limited liability company (LLC), or C or S corporation. Any business interest expense that’s disallowed by this limitation is carried forward to future tax years.

Business interest expense means interest on debt that’s allocable to a business. For partnerships, LLCs that are treated as partnerships for tax purposes, and S corporations, the limitation on the business interest expense deduction is applied first at the entity level and then at the owner level under complex rules.

The limitation on the business interest expense deduction is applied before applying the passive activity loss (PAL) limitation rules, the at-risk limitation rules and the excess business loss disallowance rules. For pass-through entities, those rules are applied at the owner level. But the limitation on the business interest expense deduction is generally applied after other federal income tax provisions that disallow, defer or capitalize interest expense.

The changes

The OBBBA liberalizes the definition of ATI and expands what constitutes floor plan financing. For taxable years beginning in 2025 and beyond, the OBBBA calls for ATI to be computed before any deductions for depreciation, amortization or depletion. This change more closely aligns the definition of ATI to the financial accounting concept of earnings before interest, taxes, depreciation and amortization (EBITDA) and increases ATI, thus increasing allowable deductions for business interest expense.

For taxable years beginning in 2025 and beyond, the OBBBA also expands the definition of floor plan financing to cover financing for trailers and campers that are designed to provide temporary living quarters for recreational, camping or seasonal use and that are designed to be towed by or affixed to a motor vehicle. For affected businesses, this change also increases allowable deductions for business interest expense.

Exceptions to the rules

There are several exceptions to the rules limiting the business interest expense deduction. First, there’s an exemption for businesses with average annual gross receipts for the three-tax-year period ending with the prior tax year that don’t exceed the inflation-adjusted threshold. For tax years beginning in 2025, the threshold is $31 million. For tax years beginning in 2026, the threshold is $32 million.

The following businesses are also exempt:

  • An electing real property business that agrees to depreciate certain real property assets over longer periods.
  • An electing farming business that agrees to depreciate certain farming property assets over longer periods.
  • Any business that furnishes the sale of electrical energy, water, sewage disposal services, gas or steam through a local distribution system, or transportation of gas or steam by pipeline, if the rates are established by a specified governing body.

If you operate a real property or farming business and are considering electing out of the business interest expense deduction limitation, you must evaluate the trade-off between currently deducting more business interest expense and slower depreciation deductions.

It’s complicated

The rules limiting the business interest expense deduction are complicated. If your business may be affected, contact us. We can help assess the impact.

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Business BriefsTax BriefsTax Planning

DOs and DON’Ts to Help Protect Your Business Expense Deductions

June 24, 2025by admin

If you’re claiming deductions for business meals or vehicle expenses, expect the IRS to closely review them. In some cases, taxpayers have incomplete documentation or try to create records months (or years) later. In doing so, they fail to meet the strict substantiation requirements set forth under tax law. Tax auditors are adept at rooting out inconsistencies, omissions and errors in taxpayers’ records, as illustrated by one recent U.S. Tax Court case. (T.C. Memo. 2024-82)

Facts of the case

The taxpayer operated a software installation, training and consulting business. She claimed substantial deductions for several tax years. The IRS disallowed many of the deductions and the U.S. Tax Court agreed. Here’s a rundown of some of the disallowed expenses and the reasons why they couldn’t be deducted:

Meals and entertainment. The business owner deducted nearly $9,000 for meal expenses in one tax year and testified the amount was for “working lunches” with the “person she worked for and the developer.” As documentation, she submitted bank statements. The court noted that “bank statements alone do not substantiate the ‘business purpose of the expense’ or the ‘business relationship’ between petitioner and the individuals with whom she dined.” It added: “The cost of eating lunch during the workday is not — without more — a deductible business expense.”

Supplies. The taxpayer deducted more than $17,000 for supplies purchased during two tax years. She testified that these included “desks, monitors, office equipment, paper, printers, [and] anything that was pertinent to the business itself.” To substantiate her reported expenses, the taxpayer submitted receipts from office supply stores. However, the receipts were dated later than the tax years in question, and they covered (among other things) purchases of soda dispensers and gift cards. The court noted that “some of these purchases appear personal” and all were made after she terminated her consulting business.

Home office expenses. Over two years, the taxpayer deducted $21,393 for the business use of a home office. But the court ruled that she “failed to prove that the ‘focal point’ of her software consulting business was her home.” At trial, she testified that she was required to be on site at a client’s office much of the time. In addition, she didn’t supply evidence to establish how much time she worked from home or what (if any) portion of her residence was used exclusively for business purposes.

Other expenses the court disallowed included attorney’s fees, utilities, hotel stays and vehicle expenses. In all cases, the taxpayer didn’t substantiate with adequate records or sufficient evidence that the expenses were related to her business.

Best practices

This case exemplifies why it’s critical to maintain meticulous records to support business expense deductions. Here’s a list of DOs and DON’Ts to help meet the strict IRS and tax law substantiation requirements for these items:

DO keep detailed, accurate records. For example, for each business meal, record the amount, date, place, business purpose, and the business relationship of any person you dine with. If you have employees whom you reimburse for meals, travel and vehicle expenses, make sure they’re complying with all the rules.

DON’T reconstruct expense logs at year end or wait until you receive a notice from the IRS. Take a moment to record the details in a log or diary or on a receipt at the time of an event or soon after. Require employees to submit weekly or monthly expense reports.

DO respect the fine line between personal and business expenses. Be careful about combining business and pleasure. Your business checking account and credit cards shouldn’t be used for personal expenses.

DON’T be surprised if the IRS asks you to prove your deductions. Vehicle, travel, meal and home office expenses are attention magnets. Be prepared for a challenge.

Stand up to scrutiny

With organization and our guidance, your tax records can stand up to IRS inspection. There may be other ways to substantiate your deductions. In addition, there may be a way to estimate certain deductions (called “the Cohan rule”), if your records are lost due to a fire, theft, flood or other disaster.

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