Form 8919 lets you report your share of uncollected Social Security and Medicare tax if a firm treated you as an independent contractor but you believe you were an employee. You file it with Form 1040 when the firm didn't withhold your share of those taxes and one of the IRS reason codes applies. It also credits the earnings to your Social Security record.
If you got a 1099-NEC for work that looked and felt like a job, this is the form to know about. Everything below comes from the 2025 Form 8919 and its instructions, as of October 2026.
Who must file Form 8919
You must file it if all of the following apply:
- You performed services for a firm.
- You believe your pay from the firm wasn't for services as an independent contractor.
- The firm didn't withhold your share of Social Security and Medicare taxes from your pay.
- One of the reason codes on the form applies to you.
A firm, for this form, is any individual, business, company, nonprofit, state or other entity you performed services for. If you're married, each spouse who needs the form completes their own.
The reason codes
| Code | When to use it |
|---|---|
| A | You filed Form SS-8 and received a determination letter saying you're an employee of the firm |
| C | You received other correspondence from the IRS saying you're an employee, including as a section 530 employee |
| G | You filed Form SS-8 and haven't received a reply |
| H | You received a W-2 and a 1099-MISC or 1099-NEC from the same firm, and the 1099 amount should have been wages on the W-2 |
There's no code B, D, E or F on the 2025 form. If none of the codes apply but you believe you should have been treated as an employee, use code G and file Form SS-8 on or before the date you file your return. Don't attach the SS-8 to your return; it's filed separately. With code H, you don't file an SS-8 at all.
How the tax is worked out
| Line | What happens |
|---|---|
| 6 | Total wages from all firms on lines 1 to 5, also entered on Form 1040, line 1g |
| 7 | Maximum wages subject to Social Security tax: $176,100 for 2025 |
| 8 | Social Security wages and tips already on your W-2s, RRTA compensation and unreported tips from Form 4137 |
| 10 | The smaller of line 6 or the room left under the maximum |
| 11 | Line 10 multiplied by 0.062 (Social Security tax rate) |
| 12 | Line 6 multiplied by 0.0145 (Medicare tax rate) |
| 13 | Lines 11 and 12 added, carried to Schedule 2 (Form 1040), line 6 |
Figures are as of October 2026. The wage cap rose from $168,600 to $176,100 for 2025. If your wages are high enough, the 0.9% Additional Medicare Tax on Form 8959 can also apply, and line 6 goes on Form 8959, line 3.
Why Form 8919 matters: your share only
This is what most misclassified workers don't realise. If you report the income as self-employment on Schedule C, you work out self-employment tax on Schedule SE, which covers both halves of Social Security and Medicare. Form 8919 only charges your share as an employee: the 6.2% Social Security rate on line 11 and the Medicare rate on line 12. The wages go on line 1g as wages, not as business income. If you really were an employee, filing the wrong way costs you the employer's half.
The risk with code G
The instructions are honest about it. Using code G isn't a guarantee the IRS will agree with you, and you or the firm may be contacted for more information. If the IRS decides you were an independent contractor after all, you may be billed for the extra tax, penalties and interest. So use code G when you've got solid grounds, and file a full SS-8 with the facts.
When not to use Form 8919
- For work you did as an independent contractor: use Schedule C and Schedule SE.
- For Social Security and Medicare tax on tips you didn't report to your employer: use Form 4137.
- For state or local government workers under a Section 218 agreement without a written Social Security Administration determination: contact the State Social Security Administrator.
Filling it in
- List each firm on lines 1 to 5 with its name and federal identification number exactly as on the 1099. If you don't know the number, ask using Form W-9, or enter unknown.
- Enter one reason code per firm, and the date of any IRS determination for codes A or C.
- Tick column (e) if you received a 1099-MISC or 1099-NEC, and enter the wages in column (f).
- Work through lines 6 to 13 once, combining all firms if you need more than one form.
- Attach Form 8919 to Form 1040, 1040-SR, 1040-NR or 1040-SS.
If you want to understand the line between the two before you file, read 1099 vs W-2 and how Form SS-8 asks the IRS to decide.
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The verdict
If you were treated as a contractor but worked like an employee, Form 8919 means paying only your share of Social Security and Medicare and getting the earnings credited to your record. Use code A, C or H when the facts are clear, file an SS-8 with code G when they aren't, and don't use it for work that was self-employment.
Frequently asked questions
What is Form 8919?
It's the IRS form for reporting your share of uncollected Social Security and Medicare tax when a firm treated you as an independent contractor but you believe you were an employee.
What are the reason codes on Form 8919?
A, C, G and H. A and C mean the IRS has said you're an employee, G means you filed Form SS-8 and haven't had a reply, and H means you got both a W-2 and a 1099 from the firm.
Where do Form 8919 wages go on Form 1040?
The total wages on line 6 go on Form 1040, line 1g, and the tax on line 13 goes on Schedule 2, line 6.
Do I attach Form SS-8 to my tax return?
No. If you use code G, file Form SS-8 separately on or before the date you file your return.
Is Form 8919 better than Schedule SE?
If you were an employee, yes. Form 8919 charges only the employee share of Social Security and Medicare, while Schedule SE is for self-employment tax on contractor income.
