Preface: “Since 1984, the proportion of beneficiary families whose benefits are taxed has risen over time from less than one in 10 to more than half” – Income Taxes on Social Security Benefits from Social Security Administration: Research, Statistics & Policy Analysis
Social Security – How Your Social Security Benefits Are Taxed
The following is the fourth in a series of blog posts on the subject of Social Security. The first three installments, which can be found here, here, and here:
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- Reviewed the history of the Social Security program
- Explained how to claim Social Security retirement benefits
- Explained how to claim Social Security survivor and family member benefits
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This fourth installment will discuss:
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- How Social Security benefits are taxed
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Future posts in this series will address:
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- How earned income is taxed to fund Social Security
- Estimating Social Security’s returns on investment
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Tax on Social Security Benefits
For almost the first 50 years of Social Security, Social Security retirement benefits were not subject to income tax. It was only with the Social Security Amendments of 1983 that they became partially taxable for some recipients. This taxation of benefits went into effect in 1984 and has been with us ever since. In fact, it has expanded apace.
The 1983 law set up dollar thresholds above which 50% of Social Security benefits become taxable. These thresholds are $32,000 for married taxpayers filing jointly and $25,000 for all other filers with one exception: for married taxpayers filing separately who lived together at any time during the year, the threshold is zero.
For purposes of applying this threshold, only half of the Social Security benefits themselves are considered. Also, tax-exempt interest income is added back.
Note that 50% of benefits being taxable does not mean that your benefits are subject to a 50% tax rate. It means that half of those benefits are taxed at your ordinary rate. The other half remains tax-free.
Amazingly, the dollar amounts of these thresholds have not been adjusted for inflation since they were first introduced in 1983. It is interesting to speculate whether this legislation would have received the support it did at the time if people had realized it would eventually apply to a majority of benefit recipients.
While most of this expansion was accomplished through inflation, a change was made a decade later that subjected some portions of benefits to an even higher degree of taxability. The Omnibus Budget Reconciliation Act (OBRA) of 1993 defined a second set of thresholds above which 85% of Social Security benefits are subject to income tax. This higher threshold is $44,000 for married filing jointly and $34,000 for other filers. These thresholds have likewise never been adjusted for inflation.
If income as computed for Social Security purposes falls above the upper threshold, then 85% of that amount of Social Security benefits is subject to tax. Any amount of benefits that falls between the thresholds is 50% taxable, but not if that would make the total taxable portion more than 85% of the benefit received.
If you would like SSA to figure the taxable amount for you, they provide their own calculator here. Many other websites provide unauthorized versions of a similar calculator.
“No Tax on Social Security”
While there was talk in the presidential campaign of 2024 about eliminating tax on Social Security benefits, what the One Big Beautiful Bill Act of 2025 (OBBBA) ended up doing was introducing an entirely new tax deduction for taxpayers over 65.
Beginning in tax year 2025, this new deduction is worth $6,000 per individual. It begins to phase out for married filers with adjusted gross income over $150,000 and fully phases out at $250,000. For single filers, these phaseout thresholds are $75,000 and $125,000. The deduction is available to anyone within these income thresholds who is of age without regard to the amount of Social Security benefits being received. In fact, you don’t have to be receiving any Social Security benefits at all to take this deduction.
The deduction will expire after tax year 2028 if it is not renewed by an act of Congress.
There has still been no change in the law governing taxation of Social Security benefits since OBRA of 1993.
Treatment of Lump Sum Benefits
If a Social Security benefit is for any reason delayed beyond the year it originated and is paid instead in a later year, it is treated for tax purposes as received in the year it was actually paid. Prior year tax returns cannot be amended to include benefits that were not received until a later year. This can result in an unusually large payment in the current year know as a “lump sum” benefit.
The only relief available to recipients of lump sum benefits is an election to figure the taxable amount of the lump sum based on the year the payment originated. The taxable amount of payments that originated in a prior year can be calculated as if they had been received in the prior year. The amount that would have been taxable in the prior year can then be considered the amount taxable in the current year, if this is more beneficial to the taxpayer.
Claim of Right
Occasionally, Social Security benefits must be repaid. For tax purposes, any amount repaid in the current year can be deducted from the amount received in the current year. However, if for any reason a benefit received in one year is not repaid until a later year, tax relief is only available as “claim of right” under Internal Revenue Code Section 1341.
Claim of right is a doctrine that applies to cases where income that was taxed in a prior year is repaid by the taxpayer in a later year. This same doctrine applies to wages or bonus repaid to an employer and also to repayment of unemployment benefits.
If the amount is less than $3,000, no relief is available.
Any claim of right amount greater than $3,000 can either be deducted as an itemized deduction on Schedule A or figured as a refundable credit on Schedule 3, whichever is more beneficial to the taxpayer. The credit is figured in the following way:
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- Tax is refigured for the year in which the amount was originally reported in income, but as if that amount had never been received.
- The difference between the refigured tax on the prior year and the actual tax in that prior year is then the credit that may be claimed in the current year.
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