Form 1065 Filing for 2026: Key Changes Under the One Big Beautiful Bill Act (OBBBA) and What You Need to Know

Filing Form 1065 can often feel like a daunting task for partnerships, with all the details that need to be reported for each partner. The process may seem straightforward at first, but with income, deductions, and credits flowing through to individual returns, things can get complicated quickly. 

 Many businesses are now facing confusion around the 2026 changes brought by the  One Big Beautiful Bill Act (OBBBA), what’s staying the same, and what’s shifting? Understanding these updates is crucial to avoid mistakes and ensure you’re making the most of the new tax benefits.  

 In this blog, we’ll break down the key changes, clear up the confusion, and guide you through what’s required for a successful Form 1065 filing in 2026. 

What is Form 1065? 

Form 1065, also known as the U.S. Return of Partnership Income, is used by partnerships to report income, deductions, gains, and losses to the IRS. While the form itself doesn’t result in tax liability for the partnership, it provides crucial information for individual partners, who report their share of income and expenses on their personal tax returns using Schedule K-1. 

Filing Deadline: 

• Standard Deadline: Form 1065 is generally due on March 15 for partnerships that follow the calendar year. 

• For returns filed in 2026, March 15 falls on a Sunday, so the filing deadline moves to March 16, 2026. 

• Extension Deadline: Partnerships can apply for a Form 1065 extension using Form 7004, which moves the deadline to September 15. 

• Weekend or Holiday Adjustment: If the deadline falls on a weekend or holiday, the due date is extended to the next business day. 

For added convenience, partnerships can also utilize Form 1065 online filing, which streamlines the process and ensures the timely submission of their returns. 

Who Files Form 1065? 

Form 1065 is required for businesses that operate as partnerships, including:  

• General Partnerships
• Limited Partnerships (LPs)
• Limited Liability Partnerships (LLPs)
• LLCs (Limited Liability Companies)

Essentially, any business structured as a partnership for tax purposes is required to file Form 1065, and it applies to partnerships regardless of whether they are engaged in profit-making activities or are non-profit entities with exempt tax status. 

What Information is Reported on Form 1065? 

Form 1065 includes various sections where partnerships report: 

• Income from business operations, interest, dividends, and other sources.
• Deductions for business expenses, salaries, and employee benefits.
• Gains or losses from the sale of business assets or investments.
• Schedule K-1, which outlines each partner’s share of income, deductions, and credits for their personal tax returns.

With the basics of Form 1065 covered, it’s time to focus on the important updates for 2026 that will impact how partnerships report their financials. 

What’s New Under the One Big Beautiful Bill Act? 

The One Big Beautiful Bill Act introduced several tax provisions that impact partnerships and pass-through businesses. While the overall structure of Form 1065 remains largely the same, certain tax rules affecting partnerships have changed. 

These updates mainly affect how partnerships calculate income, deductions, and depreciation, which can ultimately influence what partners report on their individual returns. 

The IRS Form 1065 instructions provide further details if you wish to gain a deeper understanding of the recent legislative changes and filing requirements. 

Below are the key updates introduced under the Beautiful Bill Act that you need to understand before filing your Form 1065 for 2026: 

1. Stable Structure with Computational Changes

The structure of Form 1065 remains largely the same, but the computational changes introduced for 2026 will affect how businesses calculate their income, deductions, and credits.  

Here’s how these changes break down: 

• Adjusting to New Calculation Methods: Changes in tax rules may require partnerships to update how they calculate and report deductions and credits.
• Impact on Taxable Income: These changes will affect the overall taxable income reported, so it’s crucial for businesses to update their financial reporting processes. 

To stay compliant, partnerships must update their computational methods to accurately reflect these adjustments in their Form 1065 filings. 

2. Research & Experimentation (R&E)Expense Changes

The OBBBA changes the way partnerships handle Research & Experimentation (R&E) expenses beginning with the 2026 filing season.  

Here’s how these changes break down: 

• Immediate Deduction for Domestic Research: Domestic research expenditures may now be deducted in the year they are incurred rather than being required to be amortized over several years.
• Optional Amortization: Businesses may also choose to capitalize and amortize these expenses depending on their tax strategy. 

Businesses carrying out research and development activities should take a closer look at how these costs are recorded so their 2026 partnership filings reflect the revised R&E tax treatment.  

3. Enhanced Pass-Through Benefit Continuation for QBI

The OBBBA enhances the Qualified Business Income (QBI) deduction, offering more favorable pass-through benefits for partners starting in 2026. 

Here’s how the changes will impact partnerships: 

• Increased Flow-Through Benefits: Partners will now see a greater flow-through deduction, which directly reduces their personal taxable income, offering more significant tax relief.
• Streamlined Reporting: The enhanced pass-through benefits allow partnerships to more easily allocate these deductions to individual partners via Schedule K-1, simplifying the filing process. 

These enhanced QBI benefits provide an excellent opportunity for partnerships to reduce their partners’ tax liabilities by optimizing pass-through deductions. 

4. Expanded Depreciation Benefits for Partnership Assets

The new law expands depreciation benefits under Section 179 and bonus depreciation rules for partnership-owned assets, providing immediate tax relief on capital purchases. 

Let’s break down the impact:

• Accelerating Depreciation: Partnerships can now accelerate depreciation on qualifying capital expenditures like machinery, equipment, and software, allowing for immediate deductions on purchases.
• Impact on Partners: Partners will see increased flow-through depreciation deductions on Schedule K-1, which will lower their personal tax liability. 

Partnerships should review their capital expenditures to fully capitalize on the expanded depreciation benefits available for the 2026 filing season. 

5. Impact on Cryptocurrency and Digital Asset Reporting

Partnerships engaged in cryptocurrency or digital asset transactions must now comply with more detailed IRS reporting requirements introduced under the OBBBA. 

Here’s what you need to know: 

• Reporting Digital Assets: Partnerships must report all cryptocurrency transactions, including gains, losses, and holdings, on Form 1065.
• Increased Scrutiny: Partnerships in the fintech or blockchain sectors should be prepared for additional IRS scrutiny and ensure all digital asset-related activities are accurately disclosed. 

Partnerships involved in digital assets must ensure thorough reporting to avoid non-compliance with the IRS’s new cryptocurrency regulations. 

Other Notable Updates for 2026 

Several smaller but important changes will affect Form 1065 filings for 2026: 

• Foreign Income and International Reporting: Partnerships with foreign partners or cross-border transactions may need to provide additional reporting through forms such as Schedules K-2 and K-3.
• Paid Family and Sick Leave Credits: Updated credits for paid family and sick leave will need to be reported for partnerships with employees. 
• Capital Account Maintenance: Partnerships are required to update and report changes in their capital accounts with greater transparency, in line with the new IRS guidelines.  

These additional updates require careful attention to detail, as partnerships must comply with new reporting requirements in areas like foreign income and paid leave credits. 

Conclusion  

The One Big Beautiful Bill Act introduces significant changes for Form 1065 in 2026, impacting how partnerships report income, deductions, and credits. Key updates include revised R&E deductions, enhanced QBI benefits, and expanded depreciation rules. These changes present opportunities, but they also require businesses to adjust their tax strategies. 

It’s essential to review your filing processes now to ensure compliance with these updates. Proper preparation will help maximize savings and ensure a smooth filing process. 

Book your free consultation today to ensure your Form 1065 filing is accurate and optimized for 2026.