Social Security benefits became taxable income in 1984
The federal government began taxing Social Security benefits for some recipients in 1984, following a change to the Social Security Act passed by Congress. Before that year, Social Security income was not subject to federal income tax. The change was part of a broader effort to shore up the Social Security Trust Fund, which was facing a shortfall.
Not everyone who receives Social Security pays tax on it. Whether you owe tax depends on your total income for the year — specifically, on a measure called combined income, which adds your adjusted gross income, nontaxable interest, and half of your Social Security benefits together. If that combined income exceeds a certain threshold, a portion of your benefits becomes taxable.
Key Takeaways
- Social Security became taxable in 1984 when Congress changed the law to help fund the Social Security Trust Fund.
- Whether you owe tax on benefits depends on your combined income — a calculation that includes half your Social Security plus other income.
- The income thresholds that trigger taxation have not changed since 1984, so more people are affected as incomes and benefits rise over time.
- You can reduce the amount of tax owed by managing other income sources, such as delaying retirement or adjusting withdrawals from savings.
- The IRS provides worksheets and the Social Security Administration sends Form SSA-1099 each January to help you calculate what you owe.
The income thresholds that determine taxation
The thresholds are set at $25,000 for single filers and $32,000 for married couples filing jointly. These amounts have remained the same since 1984. If your combined income falls below these thresholds, you owe no tax on your Social Security benefits.
If your combined income exceeds the threshold, up to 50 percent of your benefits may be taxable. If your combined income exceeds a second, higher threshold — $34,000 for single filers and $44,000 for married couples filing jointly — up to 85 percent of your benefits may be taxable. The exact percentage depends on how far above the threshold your income reaches.
Because these thresholds have not changed in four decades, while both wages and benefit amounts have risen, more people now fall into the taxable range than did in 1984. This is sometimes called "bracket creep," and it means that even if your income has not grown much in real terms, you may owe tax on benefits now when you would not have then.
How combined income is calculated
Combined income is not the same as your total income. To find your combined income, start with your adjusted gross income (the number at the bottom of your tax return before you claim the standard deduction). Add to that any nontaxable interest you earned — for example, interest from municipal bonds. Then add half of your Social Security benefits for the year.
This calculation includes income from pensions, part-time work, rental property, investment gains, and withdrawals from retirement accounts like IRAs and 401(k)s. It does not include Supplemental Security Income (SSI), which is a different program. If you are married and file jointly, you combine both spouses' income and both spouses' benefits.
The Social Security Administration sends you Form SSA-1099 each January showing your benefits for the previous year. The IRS provides a worksheet in the instructions for Form 1040 to help you calculate combined income and determine how much of your benefits, if any, is taxable.
Why the thresholds have stayed the same
Congress set the thresholds in 1984 and has not adjusted them since, even though inflation and wage growth have continued. This means the thresholds have lost purchasing power over time. A combined income of $25,000 in 1984 represented a much higher standard of living than $25,000 does today.
Because the thresholds are fixed while benefits and other incomes have generally risen, the proportion of beneficiaries who owe tax on their benefits has grown steadily. In the early years after the 1984 change, only a small percentage of beneficiaries were affected. Today, roughly one in three beneficiaries owes tax on at least some of their benefits, according to the Social Security Administration.
Strategies to reduce taxation on benefits
If you are still working, delaying your Social Security claim can reduce your combined income in the years before you claim. Each year you wait, your benefit amount increases, but your combined income in that year does not include those unclaimed benefits. This can keep you below the taxable threshold longer.
You can also manage the timing of other income. For example, if you have a choice about when to withdraw money from an IRA or sell an investment, doing so in a year when your Social Security benefits are lower (or not yet claimed) may reduce your combined income. Some people coordinate their work income, pension payments, and retirement account withdrawals to stay below the threshold.
Roth conversions — moving money from a traditional IRA to a Roth IRA — can sometimes help, because the conversion itself increases your combined income in the year you do it, but future withdrawals from the Roth do not. This strategy works best if you plan carefully with a tax professional, because the timing matters.
How the tax is collected
If you owe tax on your Social Security benefits, you pay it the same way you pay any other federal income tax: through withholding during the year or by making estimated tax payments, or by paying the full amount when you file your return in April.
You can ask the Social Security Administration to withhold federal income tax directly from your benefit check. You do this by completing Form W-4V and submitting it to your local Social Security office or by calling 1-800-772-1213. You choose the withholding rate — 7, 10, 12, or 22 percent — and the amount is deducted from your monthly payment.
Alternatively, you can make quarterly estimated tax payments to the IRS using Form 1040-ES. Many people use a combination: withholding from Social Security and estimated payments on other income.
State taxation of Social Security benefits
Most states do not tax Social Security benefits. However, a small number of states — including Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont — do tax some or all of Social Security income under certain conditions. The rules vary by state.
Some states exempt benefits for people below a certain income level, while others tax benefits the same way the federal government does. A few states have different thresholds or percentages. If you live in one of these states, you may owe state income tax on your benefits even if you owe no federal tax, or vice versa. Check your state's tax authority website or speak with a tax professional to understand your state's rules.
Frequently Asked Questions
Do I have to pay tax on all of my Social Security benefits?
No. At most, 85 percent of your benefits can be taxed. The percentage that is taxable depends on your combined income. If your combined income is below the threshold for your filing status, none of your benefits are taxed.
What if I did not know I owed tax on my benefits?
If you owe back taxes on Social Security benefits, you can file an amended return using Form 1040-X for any year within the past three years. The IRS can also help you set up a payment plan if you cannot pay the full amount at once. Contact the IRS at 1-800-829-1040 or visit irs.gov.
Can I reduce my combined income to avoid taxation?
You can manage the timing of certain income sources, such as retirement account withdrawals or investment sales, to keep your combined income below the threshold in a given year. Delaying your Social Security claim also keeps combined income lower in the years before you claim. A tax professional can help you plan this strategy.
Does the tax on Social Security benefits go back into the Social Security Trust Fund?
Yes. The revenue from taxation of Social Security benefits is credited to the Social Security Trust Fund. This was the original purpose of the 1984 change — to help may support the fund had enough money to pay benefits to current and future beneficiaries.
How do I know how much of my benefits will be taxed?
The IRS provides a worksheet in the instructions for Form 1040 to calculate the taxable portion of your benefits. You can also use the Social Security Administration's online benefits calculator or speak with a tax professional. Form SSA-1099, which you receive each January, shows your total benefits for the previous year.