Deferral for defined contribution retirement plans
Income routed into 401(k)-style accounts is untaxed until withdrawal, often decades later.
JCT line: "Net exclusion of pension contributions and earnings: Defined contribution plans". Excludes defined benefit plans ($134.7B) and IRAs ($34.6B), which JCT scores separately. A deferral, not an exemption.
Participation is broad among full-time employees of larger firms, but contributions cluster at the statutory maximum among higher earners, and the deferral is worth more at higher marginal rates.
Structural reading
Included partly as a calibration case. The deferral is genuinely broad, tens of millions of households participate, and it is the clearest example in this list of a transfer that should not be read as capture simply because it is large. What makes it interesting structurally is the second-order beneficiary: the provision guarantees a recurring, automatic, largely price-insensitive flow of household savings into managed accounts, and that flow is a concentrated benefit to intermediaries regardless of how broadly the tax benefit itself is spread. Note also that this is a deferral rather than an exemption, so the cash-flow cost shown overstates the long-run figure.
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.
- Employees able to contribute at or near the statutory cap
The benefit scales with the amount deferred, so it concentrates among households with enough surplus income to reach the annual limit.
- Asset managers and recordkeepers
The provision channels a large, price-insensitive, automatically-recurring flow into managed accounts, a structural benefit to the intermediaries independent of returns.
- Higher marginal rate households deferring across a rate drop
Deferring income taxed at a high current rate into withdrawal at a lower retirement rate converts timing into a permanent rate arbitrage.
Who pays
Taxpayers generally. Workers without an employer plan, disproportionately at small firms and in part-time work, fund the deferral without access to it.
Sector aggregate.
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
- Employee Retirement Income Security Act of 1974P.L. 93-406Sep 2, 1974
Established the modern framework for tax-qualified retirement plans and the individual retirement account.
BipartisanPassed with overwhelming majorities from both parties. No separate roll call on this provision is recorded here.
- Revenue Act of 1978, §401(k)P.L. 95-600Nov 6, 1978
Added the subsection that, through an interpretation not widely anticipated at passage, became the dominant private retirement vehicle in the United States.
Mixed coalitionEnacted by a Democratic Congress with support from members of both parties. No separate roll call on this provision is recorded here.
Major amendment
- SECURE 2.0 Act of 2022P.L. 117-328Dec 29, 2022
Raised catch-up limits, delayed required minimum distributions and expanded automatic enrolment. Enacted as part of a bipartisan omnibus.
BipartisanEnacted within a bipartisan year-end omnibus. 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.