Expensing of research and experimental costs
Research spending is deducted immediately rather than written off over years.
JCT line: "Expensing of research and experimental expenditures", corporate ($41.4B) plus individual ($1.3B). Falls to $0.9B by FY2029: this is a timing benefit and the figure reflects the transition to restored immediate expensing rather than a permanent annual cost. JCT notes it is the net combined effect of domestic and foreign treatment, foreign research still being amortised over 15 years.
Value is proportional to research spending, which is concentrated among large research-performing corporations, and an accelerated deduction is only worth something against current taxable income. Broader than the incremental credit, since it does not require exceeding a base, but still tracks the scale of the research budget.
Structural reading
Worth reading alongside the research credit, because the two move in opposite directions and the contrast is instructive. This is a timing benefit rather than a permanent one, and JCT's own estimates fall from $42.7B to $0.9B across five years as the transition to restored expensing works through. The more revealing history is why it needed restoring at all: immediate deduction had been the treatment since 1954, and the 2017 act moved to amortisation not on any theory about research but because deferring the deductions raised revenue inside the ten-year window the bill had to fit. The provision was then restored in 2025, before most firms had lived under it for long. A rule changed to make a budget score work and changed back once the score no longer mattered is a fair description of how the code acquires many of its features.
Who gets it
The channels the benefit actually flows through, described by asset position, entity form and form of return. Never by named individuals.
Cost split by the concentration score. That score is a judgement rather than a published figure, so treat this as the scale of the split, not an audited allocation.
- Research-intensive corporations
The benefit scales directly with research spending, so it accrues in proportion to the size of the research budget rather than to any measure of what the research produces.
- Firms with current taxable income
Accelerating a deduction is only valuable against income to deduct it from. Profitable incumbents capture it now; pre-revenue research firms carry it forward at reduced value, which is the opposite of where a research subsidy would do most work.
- Domestic research over foreign
Immediate expensing was restored for domestic research only. Research conducted abroad remains amortised over fifteen years, making the location of the work a tax variable.
Who pays
General taxpayers, and loss-making research firms that cannot use an accelerated deduction.
This transfer follows a general pattern, asymmetric organisation, sustained expert attention, and scheduled expiry dates.
How rent-seeking works →Legislative history and accountability
Enacting statutes, major amendments, recorded votes with party breakdown, and live reform proposals.
Enabling legislation
- Internal Revenue Code of 1954P.L. 83-591Aug 16, 1954
Established immediate deduction of research and experimental expenditures, the treatment that held for more than six decades.
BipartisanA comprehensive recodification enacted with broad support. No separate roll call on this provision is recorded here.
Major amendment
- Tax Cuts and Jobs Act of 2017P.L. 115-97Dec 22, 2017
Required research costs to be capitalised and amortised from 2022 rather than deducted immediately, a change that raised revenue within the bill's ten-year window and helped its arithmetic work.
Party-line (Republican)Enacted through budget reconciliation. No members of the minority party voted for it in either chamber. No separate roll call on this provision is recorded here.
- One Big Beautiful Bill ActP.L. 119-21Jul 4, 2025
Restored immediate expensing for domestic research in taxable years beginning after 31 December 2024. Foreign research remains capitalised and amortised over fifteen years.
Party-line (Republican)Enacted through budget reconciliation, the procedure that allows passage without minority-party votes. No separate roll call on this provision is recorded here.
Sources and data freshness
Published within the last year. Figures marked unverified are seed estimates that have not been reconciled line-by-line against the primary source document. See the methodology for how each score is constructed.