Small Business Tax briefs

New law eases the limitation on business interest expense deductions for 2025 and beyond

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.

Review your business expenses before year end

Now is a good time to review your business’s expenses for deductibility. Accelerating deductible expenses into this year generally will reduce 2025 taxes and might even provide permanent tax savings. Also consider the impact of the One Big Beautiful Bill Act (OBBBA). It makes permanent or revises some Tax Cuts and Jobs Act (TCJA) provisions that reduced or eliminated certain deductions.

“Ordinary and necessary” business expenses

There’s no master list of deductible business expenses in the Internal Revenue Code (IRC). Although some deductions are expressly authorized or excluded, most are governed by the general rule of IRC Section 162, which permits businesses to deduct their “ordinary and necessary” expenses.

An ordinary expense is one that is common and accepted in your industry. A necessary expense is one that is helpful and appropriate for your business. (It doesn’t have to be indispensable.) Even if an expense is ordinary and necessary, it may not be deductible if the IRS considers it lavish or extravagant.

OBBBA and TCJA changes

Here are some types of business expenses whose deductibility is affected by OBBBA or TCJA provisions:

Entertainment. The TCJA eliminated most deductions for entertainment expenses beginning in 2018. However, entertainment expenses for employee parties are still deductible if certain requirements are met. For example, the entire staff must be invited — not just management. The OBBBA didn’t change these rules.

Meals. Both the TCJA and the OBBBA retained the pre-2018 50% deduction for business meals. What about business meals provided in connection with nondeductible entertainment? They’re still 50% deductible, as long as they’re purchased separately from the entertainment or their cost is separately stated on invoices or receipts.

Through 2025, the TCJA also expanded the 50% deduction rule to meals provided via an on-premises cafeteria or otherwise on the employer’s premises for the convenience of the employer. (Previously, such meals were 100% deductible.) The deduction was scheduled to be eliminated after 2025. The OBBBA generally retains this deduction’s 2026 elimination, with some limited exceptions that will qualify for a 100% deduction. But meal expenses generally can be 100% deducted if the meals are sold to employees.

Transportation. Transportation expenses for business travel are still 100% deductible, provided they meet the applicable rules. But the TCJA permanently eliminated most deductions for qualified transportation fringe benefits, such as parking, vanpooling and transit passes. However, those benefits are still tax-free to recipient employees, up to applicable limits. The OBBBA doesn’t change these rules.

Before the TCJA, employees could also exclude from taxable income qualified bicycle commuting reimbursements, and this break was scheduled to return in 2026. However, the OBBBA permanently eliminates it.

Employee business expenses

The TCJA suspended through 2025 employee deductions for unreimbursed employee business expenses — previously treated as miscellaneous itemized deductions. The OBBBA has permanently eliminated this deduction.

Businesses that don’t already have an employee reimbursement plan for these expenses may want to consider implementing one for 2026. As long as the plan meets IRS requirements, reimbursements are deductible by the business and tax-free to employees.

Planning for 2025 and 2026

Understanding exactly what’s deductible and what’s not isn’t easy. We can review your current expenses and help determine whether accelerating expenses into 2025 makes sense for your business. Contact us to discuss year-end tax planning and to start strategizing for 2026.

If you own a business, the Sec. 179 expensing election allows you to deduct the cost of purchasing eligible assets rather than depreciating them over multiple years. An annual expensing limit applies, which begins to phase out dollar-for-dollar when acquisitions for the year exceed the phaseout threshold. 

For qualifying property placed in service in 2025, the One Big Beautiful Bill Act (OBBBA) doubles the expensing limit to $2.5 million. The 2025 phaseout threshold is $4 million, up from $3.13 million before the OBBBA. In 2026, after inflation adjustments, the expensing limit increases to $2.56 million and the break begins to phase out when acquisitions for the year exceed $4.09 million.

As the end of the year approaches, many people give more thought to supporting their favorite charities. If you’re charitably inclined and you itemize deductions, you may be entitled to deduct your charitable donations. Note that the key word here is “may” because there are certain limitations and requirements your donations must meet.

 To be eligible to claim valuable charitable deductions, you must substantiate your gifts with specific documentation. Here’s a breakdown of the rules.

 Cash donations

Cash donations of any amount must be supported by one of two types of documents that display the charity’s name, the contribution date and the amount:

 1. Bank records. These can include bank statements, electronic fund transfer receipts, canceled checks (including scanned images of both sides of a check from the bank’s website) or credit card statements.

2. Written communication. This can be in the form of a letter or email from the charity. A blank pledge card furnished by the charity isn’t sufficient.

In addition to the above, cash donations of $250 or more require a contemporaneous written acknowledgement (CWA) from the charity that details the following:

• The contribution amount, and
• A description and good faith estimate of the value of any goods or services provided in consideration (in whole or in part) for the donation.

 A single document can meet both the written communication and CWA requirements. For the CWA to be “contemporaneous,” you must obtain it by the earlier of 1) the extended due date of your tax return for the year the donation is made, or 2) the date you file your return.

If you make charitable donations via payroll deductions, you can substantiate them with a combination of an employer-provided document — such as Form W-2 or a pay stub — that shows the amount withheld and paid to the charity, and a pledge card or similar document prepared by or at the direction of the charity showing the charity’s name.

 For a donation of $250 or more by payroll deduction, the pledge card or other document must also state that the charity doesn’t provide any goods or services in consideration for the donation.

 Noncash donations

If your noncash donation is less than $250, you can substantiate it with a receipt from the charity showing the charity’s name and address, the date of the contribution, and a detailed description of the property. For noncash donations of $250 or more, there are additional substantiation requirements, depending on the size of the donation:

• Donations of $250 to $500 require a CWA.
• Donations over $500, but not more than $5,000, require a CWA and you must complete Section A of Form 8283 and file it with your tax return. Section A includes a description of the property, its fair market value and the method of determining that value.
• Donations over $5,000 require all the above, plus you must obtain a qualified appraisal of the property and file Section B of Form 8283 (signed by the appraiser and the charity). There may be additional requirements in certain situations. For instance, if you donate art of $20,000 or more, or if any donation is valued over $500,000, you must attach a copy of the appraisal to your return. Note: No appraisal is required for donations of publicly traded securities.

 Additional rules may apply for certain types of property, such as vehicles, clothing and household items, and privately held securities.

 Charitable giving in 2026

Generally, charitable donations to qualified organizations are fully deductible up to certain adjusted gross income (AGI)-based limits if you itemize deductions. The One Big Beautiful Bill Act (OBBBA) creates a nonitemizer charitable deduction of up to $1,000, or $2,000 for joint filers, which goes into effect in 2026. Only cash donations qualify.

 Also beginning in 2026, a 0.5% floor will apply to itemized charitable deductions. This generally means that only charitable donations in excess of 0.5% of your AGI will be deductible if you itemize deductions. So, if your AGI is $100,000, your first $500 of charitable donations for the year won’t be deductible. Contact us for help developing a charitable giving strategy that aligns with the new rules under the OBBBA and times your gifts for maximum impact.

 Make charitable gifts for the right reasons

For most people, saving taxes isn’t the primary motivator for making charitable donations. However, it may affect the amount you can afford to give. Substantiate your donations to ensure you can claim the deductions you deserve. If you’re unsure whether you’ve properly substantiated your charitable donation, contact us.