Section 174 & 174A
The treatment of specified research or experimental expenditures — the TCJA's mandatory amortization era, the 2025 restoration of domestic expensing under Section 174A, transition rules, and the accounting-method mechanics that follow.
Start here
2 piecesNo background assumed — the pieces that build the foundation.
Brief · Intro · 3 min
Section 174A and startup cash planning
With domestic R&E expensing restored under Section 174A, most startups should simply deduct — but the 60-month capitalization election can protect NOLs from Section 382 limits, and the payroll offset stacks on top either way. A simple year-one cash view.
Brief · Intro · 4 min
Website costs versus software development: where the Section 174 line ran
Building a marketing website — pages, content, design, a CMS configured out of the box — was never Section 174 software development. Writing code that makes a site do something new was. The line runs between content and functionality, and between configuring purchased tools and customizing them with your own engineering.
The working layer
19 piecesThe practitioner's day-to-day rules, mechanics, and traps.
Guide · Working · 7 min
The software company playbook for Section 174A
Section 174A restored expensing for domestic software development, but software companies still have real planning work: splitting engineering orgs into SRE and non-SRE activity, pricing offshore teams under the surviving 15-year rule, and deciding when the 60-month election beats immediate deduction.
Guide · Working · 7 min
Identifying SRE expenditures: what belongs in the Section 174 pool
How to build the specified research or experimental expenditure pool: direct costs, allocable indirect costs, the statutory software development sweep, funded research, and the line against ordinary Section 162 expenses — with documentation approaches that survive exam.
Guide · Working · 7 min
Section 174 transition rules: amend, catch up in one year, or two
The OBBBA gives taxpayers a menu for recovering domestic R&E costs capitalized in 2022–2024: small businesses can amend those returns, and everyone can deduct the unamortized balance over one or two years starting in 2025. Worked examples and the modeling that picks a winner.
Guide · Working · 7 min
Section 174A: how the new domestic R&E expensing regime works
Section 174A restores immediate deduction of domestic research or experimental expenditures for tax years beginning after December 31, 2024, with an elective 60-month capitalization. Here is what it covers, what stays under old Section 174, and how it meshes with the research credit.
Guide · Working · 9 min
Section 174 explained: from full expensing to amortization and back
How Section 174 went from immediate expensing to mandatory five- and fifteen-year amortization in 2022, and how new Section 174A restored domestic expensing for tax years beginning after 2024.
Brief · Working · 3 min
R&D in financial services: Section 174 and the credit for banks, insurers, and asset managers
Financial institutions write enormous amounts of software — trading systems, underwriting models, risk engines — and that development is SRE under Section 174/174A even though the industry sells no technology. The Section 41 credit is harder: most of this software is internal-use, so the three-part high-threshold-of-innovation test stands between the same costs and a credit.
Brief · Working · 3 min
Contract development: two parties, one project, whose Section 174 cost?
When a customer hires a development shop, Section 174 assigns the SRE expenditures by financial risk and rights in the results — not by who writes the code or who signs the checks. Read the contract's risk and IP terms first; they usually decide the whole analysis.
Brief · Working · 3 min
State conformity to Section 174A: three patterns, one tracking problem
Rolling-conformity states picked up Section 174A expensing automatically; static-conformity states are frozen at pre-OBBBA law until their legislatures act; a third group selectively decouples. Until the map settles, multistate taxpayers must keep parallel 174 schedules and addback workpapers state by state.
Brief · Working · 3 min
R&D costs on the financial statements: ASC 730 vs. the tax rules
Book accounting expensed R&D all along under ASC 730 while tax capitalized it in 2022–2024 — creating large deferred tax assets that Section 174A now releases. What CFOs and auditors should expect in the rate reconciliation and cash-tax line.
Brief · Working · 4 min
Government contractors and Section 174: IR&D, direct-charge research, and the funded-research mirror
A contractor performing research under a cost-reimbursable or T&M government contract, with no financial risk and no retained rights, generally has no SRE expenditures — the costs are contract-performance costs. Fixed-price work, retained data rights, and independent R&D each change the answer, and the Section 41 funded-research rules run a parallel but not identical test.
Brief · Working · 3 min
Abandoned research projects: when failure is deductible
During the 2022–2024 capitalization era, abandoning a research project produced no loss — Section 174(d) barred any deduction and the amortization simply continued. Under Section 174A, failed domestic research after 2024 was deducted when incurred, so there is nothing left to abandon. Foreign failures still amortize to the bitter end.
Brief · Working · 3 min
Section 481(a) and the Section 174 method change
Moving from 2022–2024 capitalization to Section 174A expensing is an accounting-method change: automatic consent, Form 3115 or streamlined statements, and a Section 481(a) adjustment that releases the stranded balance over one or two years.
Brief · Working · 3 min
Pilot models and prototypes: Section 174's reach versus Section 41 supplies
A pilot model under the Section 174 regulations is any representation or model produced to evaluate and resolve uncertainty — including a full-scale, functional, even saleable unit. The 174 definition sweeps broader than the Section 41 supplies rules, and the two computations diverge on the same prototype.
Brief · Working · 4 min
Amend 2022–2024 or take the catch-up? The small-business Section 174 decision
Small businesses under the $31 million gross-receipts test can recover stranded Section 174 deductions by amending 2022–2024 returns or by the one- or two-year catch-up. The choice turns on refund interest, statute timing, audit exposure, and administrative cost.
Brief · Working · 3 min
Section 174 and NOLs: how capitalization burned loss carryforwards, and how the catch-up rebuilds them
For 2022–2024, Section 174 capitalization manufactured taxable income that companies sheltered by burning NOL carryforwards — at 80 cents of shelter per dollar of income under Section 172. The OBBBA catch-up deduction reverses the income, and for loss companies it regenerates NOLs at full value.
Brief · Working · 3 min
Cloud computing costs under Section 174: dev is SRE, prod is not
Cloud spend supporting software development — dev, test, and staging environments — is an SRE expenditure; the cost of running released software for customers is an ordinary operating expense. The environment the compute serves, not the vendor invoice, draws the line.
Brief · Working · 3 min
Section 174 vs. Section 41: the deduction and the credit in five minutes
Section 174 (and now 174A) governs when research costs are deducted; Section 41 grants a credit on a narrower slice of them. Here is the relationship, the size gap between the two pools, and how Section 280C bridges them.
Brief · Working · 3 min
Foreign research and the 15-year rule that survived
Section 174A restored expensing only for domestic research. Foreign SRE expenditures still amortize over 15 years under Section 174 — and where contractors actually perform the work, not who signs the invoice, decides which side of the line a cost falls on.
Brief · Working · 3 min
Why software development was swept into Section 174 — and what 174A changes
The TCJA made every software development cost a Section 174 SRE expenditure by statute, forcing capitalization in 2022–2024. Section 174A restores expensing for domestic software work, but the statutory sweep itself survives.
Pro details
5 piecesSpecialist nuance: edge cases, interactions, and planning.
Guide · Pro · 9 min
Allocating indirect costs to SRE activities: methods that survive exam
Section 174 has always reached beyond direct research labor to the overhead that supports it — rent, utilities, depreciation, and supervisory time. This guide covers which indirect costs must be allocated to SRE activities, what a reasonable allocation method looks like, and the errors that draw examiner attention.
Brief · Pro · 3 min
Reimbursed research: who holds the Section 174 cost when someone else pays
A research provider paid under contract generally has no SRE expenditures if it performs the work without financial risk and without rights in the results — the costs belong to the funding customer. The test runs as a rough mirror image of the Section 41 funded-research rules, but the two do not always assign the same party.
Brief · Pro · 4 min
Section 174 in consolidated groups: intercompany research, ownership of the deduction, and departing members
In a consolidated group, each member computes its own Section 174 and 174A items, but intercompany research arrangements decide which member holds the SRE cost — and the intercompany transaction regulations defer the seam. When a member leaves, its unamortized balances leave with it.
Brief · Pro · 4 min
Section 174 in partnerships: entity-level capitalization and what the K-1 actually shows
SRE expenditures are capitalized or deducted at the partnership level, not by the partners — the partnership's method controls, and partners see the results baked into their distributive share of ordinary income. Section 704(b) allocations, built-in 704(c) items, and tiered structures each add their own wrinkle.
Brief · Pro · 4 min
Unamortized Section 174 balances in M&A: stock deals, asset deals, and what diligence should ask
In a stock acquisition, the target's unamortized Section 174 balances survive and keep amortizing on their original schedule — a Section 381 carryover in a tax-free deal, simple continuity in a taxable one. In an asset deal, the balances stay behind with the seller, and the buyer takes cost basis in what it bought instead.