Updated October 17, 2026. Quick answer: Box 3 of Form SSA-1099 shows the total social security benefits paid to the person named in box 1 for the year. Publication 915 warns that the figure may not agree with the amounts you actually received because adjustments may have been made before you got your money. The “Description of Amount in Box 3” on the form lists those adjustments, and box 5 is the box that carries into the tax worksheets.
IRS worksheets read line by line: Social Security Lump-Sum Worksheet 2, Social Security Lump-Sum Worksheet 3 and Social Security Lump-Sum Election Worksheet 4.
What box 3 reports
The publication describes the box in two sentences: “The figure shown in this box is the total benefits paid in 2025 to you (the person named in box 1).” “This figure may not agree with the amounts you actually received because adjustments may have been made to your benefits before you received them.”
In plain terms, box 3 is a gross figure. It is built from the benefits the Social Security Administration paid, plus the amounts it took out of those benefits for other purposes, less a few items that were not part of your benefit for the year. The form shows each of those pieces so you can reconcile the number to your bank statements. This page covers box 3; the other boxes on the same statement are laid out in the SSA-1099 and RRB-1099 boxes guide.
Box 3 is also the first half of a subtraction. The publication says “Your gross benefits are shown in box 3 of Form SSA-1099 or RRB-1099.” “Your repayments are shown in box 4.” Those two boxes produce SSA-1099 box 5, which is covered on its own page, and SSA-1099 box 4 explains the repayment side.
Why box 3 may not match your deposits
The most common reason is that some money was deducted before it reached you. The description section of the form says that it “describes the items included in the amount shown in box 3”. It continues: “It lists the benefits paid and any adjustments made.” “Only the adjustments that apply to you will be shown.” “If no adjustments were made to the benefits paid, the word “none” will be shown.”
If you compare box 3 to the sum of your monthly deposits for the year and the two differ, start with the lines under “Description of Amount in Box 3”. The table below walks through the structure of that description using the publication’s own words.
| Line in the description | What the publication says |
|---|---|
| Paid by check or direct deposit | “This is the amount you actually received or that was deposited directly into your account in a financial institution in 2025.” |
| Additions | “The following adjustment items may have been deducted from your benefits in 2025.” |
| Total additions | “The figure shown here is the sum of the amounts paid by check or direct deposit plus all the additions described previously.” |
| Subtractions | “The following adjustment items may have been included in the payments you received in 2025.” |
| Total subtractions | “The figure shown here is the sum of all the subtractions described previously.” |
| Benefits for 2025 | “The amount shown here is the result of subtracting the figure in Total subtractions, earlier, from the figure in Total additions, earlier.” “This amount is the same as that shown in box 3.” |
The bank deposit total is the first line in that structure, not the last. Every item listed under additions was taken out of your payment and is added back, so the gross figure in box 3 can be larger than the cash that reached your account. The Medicare premium item is the one most recipients see, and it has its own page: the Medicare premium line.
The additions and subtractions at a glance
Under additions, the publication lists the types of deduction that may appear. Medicare premiums are the first. The others include “Workers’ compensation offset.” “Disability payments” “Deductions for work or other adjustments.” “Attorney fees.” and “Voluntary federal income tax withheld.” The last of these is the same amount shown in box 6, which is covered on the page for SSA-1099 box 6.
Under subtractions, the publication lists items that were part of what you received but are not counted as your benefit for the year in the same way. Examples it gives are “Payments for months before December 1983.” “Lump-sum death payment.” “Amounts refunded to you.” and “Amounts paid to you for other family members.” For the last of these, the publication explains: “This entry shows benefit payments paid to you on behalf of a minor child or disabled adult.”
Only the lines that apply to you will have an amount. If a line is blank or says none on your own statement, nothing of that type affected your payments.
The asterisk on box 3
Sometimes a star follows the number. The publication explains: “An asterisk (*) after the figure shown in” “this box means that it includes benefits received in 2025 for 1 or more earlier years.”
When the asterisk appears, the lower part of the description carries an extra line. The publication words it this way: “The figure shown here is the amount of any lump-sum benefit payment received in 2025 that is for an earlier year after 1983.” The same passage points to the lump-sum election discussion in the publication for how those payments are handled. If your box 3 has an asterisk, that extra line is worth reading before you fill out the worksheets, because it tells you how much of the total relates to earlier years.
Where box 3 fits when you file
Box 3 by itself is not what you enter on the notice worksheet or on the Form 1040 worksheet. The publication says about the adjustment items: “Don’t reduce the amount of net social security benefits (box 5) by any of the items listed below.” “Use the amount in box 5 to figure taxable social security.”
So the practical order is: read box 3 to understand what was paid and why it differs from your deposits, then use box 5 for the return itself. For how the taxable portion is figured, see the Social Security tax torpedo page, and for where the result lands, see the Form 1040 page. Retirees who also receive railroad benefits can compare the structure with RRB-1099 box 3.
Edition and box numbers
The primary read for this page is Publication 915 for 2025 returns, the IRS publication that explains Forms SSA-1099 and RRB-1099 and reproduces a sample SSA-1099. It describes the form with the words “Form SSA-1099, Social Security Benefit Statement 2025”. Only that edition was read for this page, so no wording is compared against any other edition. Box 3 is labelled with the year in the sample form shown there, as in “Box 3. Benefits Paid in 2025”. The sample in the publication carries its own caution: “You should, however, compare the form you received with the one shown in this publication to note any differences.” Check the tax year printed on the statement you received before relying on any box description here.
Common mistakes
- Treating box 3 as the total you received in cash. The publication says the figure “may not agree with the amounts you actually received”.
- Ignoring the asterisk. It “includes benefits received in 2025 for 1 or more earlier years”, so part of the total belongs to prior years.
- Entering box 3 on the worksheet instead of box 5. The publication says to “Use the amount in box 5 to figure taxable social security.”
Related: the Social Security tax torpedo, Form 1040, and 2025 tax brackets.
Sources
- Publication 915, Social Security and Equivalent Railroad Retirement Benefits (for 2025 returns): https://www.irs.gov/pub/irs-pdf/p915.pdf
- IRS web edition of Publication 915 (2025): https://www.irs.gov/publications/p915
Read from the IRS documents linked above on October 17, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer, the account provider or the IRS is the right place to confirm anything consequential.