Can You Immediately Deduct Section 174 R&D Costs? Tax Guide

Understanding whether your business can immediately deduct Section 174 R&D costs represents the most impactful corporate tax shift for American innovation since the Tax Cuts and Jobs Act (TCJA) of 2017. For tax years 2022 through 2024, enterprises were forced to amortize all domestic research over five years, triggering phantom tax liabilities and severe cash flow crunches. Below: how IRC Section 174A permanently overhauls domestic research expensing, which software engineering costs qualify, how historical 2022–2024 capitalized balances are recovered under IRS Revenue Procedure 2025-28, how Section 174A coordinates with Section 41 R&D tax credits, and the procedural election rules required on current tax filings.

Domestic Section 174 R&D costs are 100% deductible in the year paid or incurred under IRC Section 174A for tax years 2025 and onward, while foreign research costs must be amortized over 15 years under Section 174, according to the Internal Revenue Service (IRS) (July 2025).

• Enacting Legislation: One Big Beautiful Bill Act (OBBBA, P.L. 119-2, signed July 4, 2025)
• Governing Domestic Code: IRC Section 174A (Permanent 100% immediate expensing)
• Governing Foreign Code: IRC Section 174 (Mandatory 15-year / 180-month amortization)
• Transition Revenue Procedure: IRS Rev. Proc. 2025-28 (Catch-up deductions and amended return rules)
• Tax Credit Interaction: IRC Section 280C coordination rule (Dollar-for-dollar deduction add-back)

1. Can businesses immediately deduct Section 174 R&D costs?
2. How did Section 174A change domestic R&D expensing rules?
3. Which domestic software development costs qualify for immediate deduction?
4. What are the rules for amending 2022–2024 capitalized R&D returns?
5. How does Section 174 expensing interact with Section 41 R&D credits?
6. What procedural elections are required under IRS Revenue Procedure 2025-28?
7. Frequently asked questions
8. Conclusion
9. Read next

Can businesses immediately deduct Section 174 R&D costs?

Yes, businesses can immediately deduct Section 174 R&D costs for all qualifying domestic research and experimental (R&E) activities for tax years beginning after December 31, 2024. However, the federal tax code now operates under a strict two-tier geographical framework:

• Domestic R&E Expenditures: Governed by IRC Section 174A, which permits taxpayers to fully expense 100% of U.S.-based research, engineering, and software development costs in the year incurred.
• Foreign R&E Expenditures: Governed by IRC Section 174, which continues to require mandatory 15-year amortization (180 months) using the mid-year convention, yielding only a 3.33% deduction in year one.

U.S. businesses can fully expense 100% of domestic R&D costs under Section 174A, but must amortize foreign research costs over 15 years under Section 174.

The geographic bifurcation means corporate accounting teams must maintain strict ledger segregation between domestic developers and offshore engineering contractors, reinforcing operational standards discussed in our guide to accounting procedures for tech startups.

Tax Dimension	Domestic Research (IRC §174A)	Foreign Research (IRC §174)
Primary Statutory Code	IRC Section 174A(a)	IRC Section 174(a)(2)
Immediate Expensing Status	100% fully deductible in year incurred	Prohibited (0% immediate deduction)
Amortization Period	None (or elective 5-year under §59(e))	Mandatory 15 years (180 months)
First-Year Deduction Rate	100% of qualifying expenditures	3.33% (Mid-year convention)
Software Development	100% expensed or 60-month amortization	15-year mandatory amortization
Interaction with §41 Credit	Dollar-for-dollar reduction under §280C	Ineligible for federal R&D tax credits

How did Section 174A change domestic R&D expensing rules?

Between 2022 and 2024, the TCJA mandatory amortization regime caused widespread financial strain. Under Section 13206 of the TCJA, companies spending $1,000,000 on domestic software engineering could only deduct $100,000 in the first tax year (due to the five-year schedule and mid-year convention), creating $900,000 of phantom taxable income.

Congress permanently corrected this distortion by enacting the One Big Beautiful Bill Act (OBBBA), creating IRC Section 174A. Under Section 174A(a), taxpayers may treat domestic research or experimental expenditures paid or incurred during the taxable year as deductible expenses that are not chargeable to a capital account.

Section 174A permanently restores full immediate expensing for domestic research, ending mandatory five-year amortization for U.S. development.

Taxpayers who wish to manage net operating loss (NOL) limitations or optimize alternative minimum tax (AMT) thresholds may still elect to capitalize domestic research expenditures and amortize them over a period of not less than 60 months under Section 174A(b) or over 10 years under Section 59(e).

Which domestic software development costs qualify for immediate deduction?

The internal revenue code explicitly defines software development as a research and experimental expenditure. Under Section 174A(c)(3), any amount paid or incurred in connection with the development of any software within the United States qualifies for immediate expensing.

Qualifying domestic software development expenditures include:

• Direct Developer Compensation: W-2 wages, payroll taxes, and health benefits paid to software engineers, UI/UX designers, data architects, and QA testers located in the United States.
• Domestic Independent Contractors: Fees paid to U.S.-based software consulting firms and third-party engineering contractors.
• Cloud Infrastructure & Tooling: Server hosting and cloud computing expenses (e.g., AWS, Azure, GCP) directly utilized for software testing, staging environments, and algorithmic development.
• Allocable Overhead: Facility rent, utilities, and IT software licenses directly supporting domestic development staff.

Engineering wages, U.S. contractor fees, staging cloud servers, and allocable facility overhead qualify for 100% immediate deduction under Section 174A.

Routine software maintenance, bug fixing post-commercial release, and general administrative marketing activities fall outside Section 174A and continue to be deducted as standard ordinary and necessary business expenses under IRC Section 162, aligning with startup ledger workflows detailed in our guide to bookkeeping for startups and early-stage SaaS.

What are the rules for amending 2022–2024 capitalized R&D returns?

To address the unamortized capitalized balances accumulated during the mandatory amortization years (2022–2024), the IRS issued Revenue Procedure 2025-28, establishing two separate relief pathways based on corporate scale:

Taxpayer Category	Gross Receipts Threshold	Treatment of 2022–2024 Unamortized Domestic R&D
Eligible Small Businesses	Average annual gross receipts ≤ $31 million	Permitted to file amended returns for 2022, 2023, and 2024 to claim retroactive 100% deductions. (Election window closed July 6, 2026).
Large Enterprises & General Filers	Average annual gross receipts > $31 million	Cannot amend prior returns. Allowed a “super deduction” to write off 100% of remaining unamortized domestic balances on 2025 returns, or split 50/50 across 2025 and 2026.

Small businesses had a one-time window to retroactively amend prior returns, while larger taxpayers capture remaining unamortized balances via accelerated catch-up deductions.

For large enterprises, taking the catch-up super deduction on their 2025 or 2026 return eliminates the unamortized capitalized asset from tax balance sheets without triggering audit penalties, reflecting fundamental principles of cash vs accrual tax accounting.

How does Section 174 expensing interact with Section 41 R&D credits?

While Section 174A governs expense deductions and Section 41 governs tax credits, the two provisions rely on overlapping pools of qualified research expenses (QREs). Section 70302 of the OBBBA updated IRC Section 280C to prevent taxpayers from claiming a double tax benefit on the same dollar of research spending.

Under Section 280C(c), a taxpayer claiming a Section 41 R&D credit must choose one of two coordination methods:

• Deduction Reduction Method: Reduce the current-year Section 174A deduction by the full amount of the Section 41 credit claimed (or add back the credit amount to taxable income).
• Reduced Credit Election (§280C(c)(2)): Elect to claim a reduced Section 41 credit (reduced by the maximum corporate tax rate, currently 21%), preserving 100% of the gross Section 174A deduction.

Taxpayers must reduce their Section 174A deduction by the Section 41 credit amount or make a Section 280C election to claim a reduced credit.

In practice, integrating R&D deductions with tax credits requires rigorous documentation. In a technical accounting discussion on Reddit, a senior tax manager outlined the compliance rigor required on federal tax filings:

With Section 174A back in place, our clients were thrilled to wipe out phantom tax bills. But starting in 2026, the IRS made Section G of Form 6765 mandatory, requiring quantitative project-by-project cost breakdowns down to the specific business component level. If your payroll systems cannot tie engineering sprints directly to code repositories, claiming both the deduction and the credit becomes an audit risk.

Reddit r/Accounting

Review filing instructions directly on the IRS Form 6765 portal to verify component-level reporting standards before submission.

What procedural elections are required under IRS Revenue Procedure 2025-28?

IRS Revenue Procedure 2025-28 provides streamlined procedural guidance for taxpayers adopting Section 174A. Taxpayers are not required to submit a cumbersome Form 3115 (Application for Change in Accounting Method) to implement immediate domestic expensing.

• Statement in Lieu of Form 3115: Taxpayers can adopt immediate domestic expensing or execute historical catch-up deductions by simply attaching a signed election statement to their timely filed federal income tax return (including extensions).
• Election Details: The statement must specify the taxpayer’s name, EIN, taxable year of adoption, total domestic research expenditures expensed under Section 174A, total foreign research expenditures capitalized under Section 174, and the chosen transition method for historical 2022–2024 balances.
• Electronic Filing Compatibility: Modern tax preparation software natively supports the Rev. Proc. 2025-28 PDF attachment format for corporate Form 1120 and partnership Form 1065 filings.

Taxpayers can adopt Section 174A and catch-up deductions by attaching an election statement to their return without filing Form 3115.

Establishing automated internal ledger pipelines to separate domestic from foreign engineering costs ensures clean tax compliance, reflecting system control frameworks examined in our guide to accounting information system architecture.

Verified September 2026. Section 174A is permanently effective for domestic R&D; this guide is updated as the Treasury Department and IRS issue further administrative rulings.

Conclusion

The restoration of immediate domestic R&D expensing under Section 174A provides vital cash flow relief for American technology and manufacturing enterprises. By eliminating the punitive five-year amortization requirement for U.S.-based research, companies can reinvest working capital directly into engineering growth. However, corporate finance teams must maintain strict geographic tracking between domestic and foreign development, execute Section 280C tax credit coordination accurately, and attach required Rev. Proc. 2025-28 election statements to their corporate tax filings.

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