President Donald Trump has promoted eliminating federal income taxes on Social Security benefits. The idea is easy to understand: Retirees would keep more of their money. Its actual effects, however, would vary substantially depending on a beneficiary’s income, age and other sources of retirement income.
Congress did not completely repeal federal taxation of Social Security benefits in 2025. Instead, the One Big Beautiful Bill Act created a temporary additional deduction for qualifying taxpayers age 65 and older. The deduction is available for tax years 2025 through 2028 and is worth up to $6,000 per eligible person, or $12,000 for a married couple when both spouses qualify. It begins to phase out when modified adjusted gross income exceeds $75,000 for an individual or $150,000 for a married couple filing jointly.
The law did not change the formula used to determine how much Social Security is included in taxable income. That distinction matters when evaluating who receives the largest tax benefit.
How Social Security Benefits Are Taxed
Federal taxation of Social Security is based on a measure known as provisional income. It generally combines adjusted gross income, certain otherwise tax-exempt income and half of a person’s Social Security benefits.
For most single filers:
- Benefits are not included in taxable income when provisional income is $25,000 or less.
- Up to 50% of benefits may be included when provisional income is between $25,000 and $34,000.
- Up to 85% may be included when provisional income exceeds $34,000.
For married couples filing jointly, the corresponding thresholds are $32,000 and $44,000.
These percentages are not tax rates. They represent the portion of Social Security benefits that may be added to taxable income. The taxpayer then pays the ordinary income-tax rate applicable to their overall return.
Deductions can reduce or eliminate the resulting tax liability. Consequently, a retiree can have Social Security benefits included in taxable income but still owe little or no federal income tax.
Who Would Benefit From a Complete Repeal?
A complete repeal would directly help only beneficiaries who currently owe federal income tax attributable to their benefits. Retirees whose incomes are already low enough to produce no tax liability would receive no direct tax reduction.
Beneficiaries with pensions, wages, investment income or taxable withdrawals from traditional IRAs and 401(k) accounts are more likely to cross the provisional-income thresholds. They would therefore be more likely to benefit from completely excluding Social Security benefits from taxable income.
That does not mean every beneficiary receiving a tax reduction would be wealthy. Some middle-income retirees can face taxation because the provisional-income thresholds are not indexed for inflation. However, the dollar benefit from a complete repeal generally grows when a taxpayer has more benefits included in taxable income and faces a higher marginal tax rate.
The temporary senior deduction works differently. It can help many middle- and upper-middle-income taxpayers age 65 or older, but it phases out at higher income levels. It is also available to eligible seniors who have not begun collecting Social Security. Social Security beneficiaries younger than 65 generally cannot claim it.
The Effect on Social Security Financing
Taxes collected on Social Security benefits are not deposited entirely into the federal government’s general revenue. Portions are credited to the Social Security and Medicare trust funds.
In 2025, taxes on benefits supplied approximately $56.4 billion to the Old-Age and Survivors Insurance Trust Fund, $1.4 billion to the Disability Insurance Trust Fund and $41.1 billion to Medicare’s Hospital Insurance Trust Fund.
A complete repeal without replacement revenue would therefore reduce income for both Social Security and Medicare. The temporary senior deduction also reduces some tax liability associated with Social Security benefits, although its effect is smaller than that of a complete repeal. The Congressional Research Service notes that the deduction is likely to reduce the amount credited to the trust funds.
Social Security’s financing problem predates the 2025 law and cannot be attributed to a single tax provision. The 2026 Trustees Report cited lower projected fertility, lower projected immigration and legislative changes among the factors that worsened the long-term outlook. Demographic changes produced the largest deterioration in the latest 75-year calculation.
What Trust-Fund Depletion Would Mean
The 2026 Trustees Report projects that the Old-Age and Survivors Insurance Trust Fund, which pays retirement and survivor benefits, will be able to pay full scheduled benefits until the fourth quarter of 2032.
At depletion, continuing revenue would be sufficient to pay approximately 78% of scheduled retirement and survivor benefits. The Disability Insurance Trust Fund is projected to remain solvent throughout the report’s 75-year period. On a hypothetical combined basis, the Social Security trust funds would have enough reserves to pay full scheduled benefits until the third quarter of 2034, after which continuing income would cover approximately 83%.
Depletion would not mean that every Social Security payment would stop. Payroll taxes would continue to provide substantial revenue. It would mean that, without congressional action, the program could not pay all scheduled benefits in full.
Congress could address the gap through revenue increases, benefit changes, transfers from other federal funds or a combination of approaches. The precise response remains a policy decision.
What About Medicare Premiums?
Medicare’s income-related premium adjustments for Parts B and D are based on modified adjusted gross income, generally defined for this purpose as adjusted gross income plus tax-exempt interest.
A complete repeal of taxes on Social Security benefits could lower adjusted gross income for some retirees and potentially reduce their Medicare premium surcharges. The current senior deduction is different: It is claimed as an additional deduction after adjusted gross income is calculated, so it generally does not directly reduce the income measure used to determine those surcharges.
What Retirees Can Do
Retirees and people approaching retirement should evaluate how Social Security, pensions, investment income and retirement-account withdrawals interact on their tax returns. Managing the timing of withdrawals or other income may reduce taxes, but decisions should also account for required minimum distributions, investment risk, health-care costs and long-term cash-flow needs.
Social Security should not be viewed as disappearing entirely after the projected depletion date. Nevertheless, households that can increase their private savings may be less exposed to future legislative changes.
Tax and retirement decisions depend on individual circumstances. Beneficiaries should consider consulting a qualified tax professional or fiduciary financial adviser before changing withdrawal or claiming strategies.
Caitlyn Moorhead contributed to the original reporting.
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