U.S. · Tax forms
Schedule SE line 8a, social security wages and tips.
Your W-2 wages that already used up part of the social security limit.
Line 8a is the “Total social security wages and tips”: the total of boxes 3 and 7 on your Form(s) W-2, plus railroad retirement (tier 1) compensation. If it is $176,100 or more (the 2025 limit), skip lines 8b to 10 and go to line 11.
Look up a line item
Result
Lines 7 to 10 on Schedule SE (2025 form)
| Item | Meaning | What the IRS says |
|---|---|---|
| Line 7 | Maximum combined wages and self-employment earnings subject to social security tax (2025) | $176,100 (printed on the form) |
| Line 8a | Total social security wages and tips | Total of boxes 3 and 7 on Form(s) W-2 and railroad retirement (tier 1) compensation; if $176,100 or more, skip lines 8b through 10 and go to line 11 |
| Line 8b | Unreported tips subject to social security tax | From Form 4137, line 10 |
| Line 8c | Wages subject to social security tax | From Form 8919, line 10 |
| Line 8d | Total of 8a, 8b and 8c | Add lines 8a, 8b, and 8c |
| Line 9 | Room left under the limit | Subtract line 8d from line 7; if zero or less, enter -0- here and on line 10 and go to line 11 |
| Line 10 | Social security part of the tax | Multiply the smaller of line 6 or line 9 by 12.4% (0.124) |
How the lines fit together
Read as arithmetic, the form works like this: line 7 is the 2025 limit, line 8d is what your wages and tips already used, and line 9 is the room left. Line 10 applies 12.4% to the smaller of your self-employment earnings (line 6) or that room. Line 11 multiplies line 6 by 2.9% with no such cap on this form.
Statutory employees
The Schedule SE instructions say that a statutory employee does not include the Schedule C, line 31 profit on Schedule SE, line 2, but must include the statutory employee social security wages and tips from Form W-2 on line 8a.
What the instructions leave to the form
The Schedule SE instructions have no separate paragraph titled “Line 8a”. The wording above is the form’s own, and the instructions mention the line only in the statutory employee section, besides stating the 2025 maximum of $176,100.
Worked example
Marcus has a W-2 with $60,000 in box 3 and $2,000 in box 7, so line 8a is $62,000 (assume no lines 8b or 8c). His line 6 is $30,000. Line 9 is $176,100 − $62,000 = $114,100. Line 10 is the smaller of $30,000 or $114,100 times 12.4% = $3,720. Line 11 is $30,000 times 2.9% = $870, so line 12 is $4,590. Names and figures are made up.
More line pages in this set
Related lines: Schedule SE Line 13, Schedule C Line 31.
Sources
- Schedule SE (Form 1040) (2025): The printed line 7 to 13 wording, the $176,100 limit and arithmetic. Read November 2, 2026.
- Instructions for Schedule SE (Form 1040) (2025): The 2025 maximum amount and the statutory employee line 8a reference. Page last reviewed or updated April 30, 2026. Read November 2, 2026.
Tax year 2025 instructions (page last reviewed or updated April 30, 2026). The line labels were read from the Schedule SE (Form 1040) PDF the IRS had posted on the date read, which is the 2025 edition; line numbers can shift between years, so check them against the form for your tax year. Names and figures in worked examples are made up.
Frequently asked questions
What is Schedule SE line 8a?
The total social security wages and tips: the total of boxes 3 and 7 on your Form(s) W-2 and railroad retirement (tier 1) compensation.
What is the line 7 limit for 2025?
The form prints $176,100 as the maximum combined wages and self-employment earnings subject to social security tax for 2025.
What if line 8a is $176,100 or more?
The form says to skip lines 8b through 10 and go to line 11.
What do lines 8b and 8c add?
Line 8b is unreported tips subject to social security tax from Form 4137, line 10; line 8c is wages from Form 8919, line 10. Line 8d adds 8a, 8b and 8c.
What does a statutory employee put on line 8a?
The instructions say to include the statutory employee social security wages and tips from Form W-2 on line 8a, and not to put the Schedule C, line 31 profit on Schedule SE, line 2.
Not tax advice
This page summarizes IRS instructions, mostly written for the people who prepare the form, and is not tax, legal or financial advice. A CPA or an enrolled agent can confirm what a line means for your return. Everything runs in your browser; nothing you enter is sent anywhere.