How Would the Proposed Additional Senior Deduction Compare to No Tax on Social Security

Washington, D.C. – As the “One, Big, Beautiful” (OBBB) reconciliation bills move through Congress, lawmakers are proposing a new additional standard deduction for seniors. This approach stands in contrast to a campaign promise by President Donald Trump to eliminate all income taxes on Social Security benefits. While both policies would have minimal economic growth effects relative to their costs and would contribute to the deficit, their impact on taxpayers varies significantly across income levels.

The Landscape of Social Security Taxation

The taxation of Social Security benefits, a relatively recent development, was introduced in 1983 to bolster the then-insolvent Social Security trust fund. Unlike most other forms of income, revenues from Social Security benefit taxation are specifically earmarked for the Social Security and Medicare trust funds.

Currently, the amount of Social Security benefits subject to tax depends on a taxpayer’s “combined income” – defined as adjusted gross income (AGI), tax-exempt interest income, and half of their Social Security benefits.

Single filers with combined incomes between $25,000 and $34,000 are taxed on half their benefits. Above $34,000, up to 85 percent of benefits become taxable.
Joint filers with combined incomes between $32,000 and $44,000 are taxed on half their benefits. Above $44,000, up to 85 percent of benefits become taxable.
Those below these thresholds (e.g., single filers under $25,000) are not taxed on their Social Security benefits.

The Proposed Additional Senior Deduction

Under current law, seniors aged 65 and older can already claim an additional standard deduction ($2,000 for married individuals, $1,600 for unmarried non-surviving spouses). The new proposal within the OBBB bills would introduce a separate additional deduction for seniors from 2025 through 2028, also making it available to itemizers.

The House bill proposes a $4,000 per individual deduction.
The Senate bill proposes a $6,000 per individual deduction.

This new deduction would begin to phase out at a 4 percent rate in the House bill when modified AGI (AGI plus tax-exempt interest) exceeds $75,000 for single filers and $150,000 for joint filers. The Senate bill accelerates this phase-out to 6 percent. In both versions, the deduction would be fully phased out for single filers at $175,000 and for joint filers at $250,000.

Distributional Impacts: Who Benefits Most?

Analysis comparing the proposed senior deduction to a complete exemption of Social Security benefits from taxation reveals distinct impacts across income groups:

Market Income Percentile	No Tax on Social Security Benefits (with TCJA extension)	Increased Senior Deduction (House)	Increased Senior Deduction (Senate)
0% – 20.0%	0.0%	Less than +0.05%	0.1%
20.0% – 40.0%	0.1%	0.6%	0.9%
40.0% – 60.0%	0.4%	0.5%	0.7%
60.0% – 80.0%	0.9%	0.2%	0.3%
80.0% – 100%	0.6%	Less than +0.05%	Less than +0.05%
Total	0.6%	0.2%	0.2%

Increased Senior Deduction: This policy would provide the most significant after-tax income increase to lower-middle (20%-40%) and middle-income (40%-60%) quintiles. The lowest income quintile would see minimal change, as their tax liability is often already eliminated by the existing standard deduction.
No Tax on Social Security Benefits: Exempting Social Security from income taxation would primarily benefit higher-income taxpayers. The top quintile would see a 0.6 percent increase in after-tax income, a significantly larger boost compared to the negligible impact of the proposed senior deductions on this group. The bottom quintile would see no change, as they are largely exempt from Social Security taxation already.

Fiscal Implications and Economic Growth

Both the proposed senior deduction and the elimination of Social Security taxation are projected to offer little in terms of long-term economic growth relative to their costs. Moreover, both policies would increase the federal deficit.

While the increased senior deduction, particularly with its phase-out, delivers a larger tax cut to lower-middle and middle-income taxpayers compared to a blanket exemption of Social Security benefits, its temporary nature means it would increase the reconciliation bills’ deficit impact without providing a sustained boost to the long-run economy. It also would not weaken the Social Security and Medicare trust funds as much as completely eliminating the tax on benefits, given that current taxation revenues are earmarked for these funds.

As lawmakers continue to debate the OBBB, these analyses highlight the trade-offs between targeting tax relief to specific income groups and the broader fiscal consequences of such policies.

27 thoughts on “Senior Tax Relief: Comparing a New Deduction to Eliminating Social Security Taxation”

The Landscape of Social Security Taxation

The Proposed Additional Senior Deduction

Distributional Impacts: Who Benefits Most?

Fiscal Implications and Economic Growth

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27 thoughts on “Senior Tax Relief: Comparing a New Deduction to Eliminating Social Security Taxation”