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The Daily Insight

Where do you report 401k contributions on K-1?

Author

John Thompson

Published Mar 03, 2026

Your Schedule K-1 must show with code R in box 13 the total amount of contributions made through the partnership and with code A in box 14 your Net Earnings (Loss) From Self-Employment.

Do 401k contributions need to be reported on taxes?

You don’t have to pay taxes on money that stayed in your 401(k) plan. Per IRS guidelines, your employer doesn’t include your pre-tax contributions in your taxable income because your 401(k) contributions are tax-deductible. Instead, they report your contributions in boxes 1 and 12, respectively, of your form W-2.

Where do I enter my 401k contributions in TurboTax?

Individual 401(k) plans for the self-employed (also called solo 401(k) or solo-K plans) are entered in the Other Business Situations section of Income & Expenses in TurboTax.

Are my Solo 401k contributions tax-deductible?

In a Solo 401(k) plan all contributions you make as the “employer” will be tax-deductible (subject to IRS maximums) to your business with any earnings growing tax-deferred until withdrawn. But for contributions you make as an “employee” you have more flexibility.

What to do if your retirement contribution is wrong on your K-1?

If the retirement contributions are reported incorrectly on the K-1, contact the preparer of the K-1 to obtain a correction. Otherwise, you can make entries directly in the Self-employed retirement section of TurboTax provided that your Schedule K-1 (Form 1065) shows with code A in box 14 the correct amount of net earnings from self-employment.

How to calculate 401k contribution from K-1 passthrough?

To calculate the 401K deduction from income flowing from an Individual’s passthrough, self-employment income must be entered. For a Partnership (1065) passthrough: Go to Federal Interview Form K-1 – K-1 General, Income, Deductions, Investment Interest & SE Information.

Where do I put my K-1 on Form 1040?

For these to appear on line 28 of Form 1040, your Schedule K-1 must show with code R in box 13 the total amount of contributions made through the partnership and with code A in box 14 your Net Earnings (Loss) From Self-Employment.

Where do I report my 401k contribution on my tax return?

Contributions made based on your Schedule K-1 (Form 1065) income should also be reported on line 28 of Form 1040 as well as line 13 of your K-1 (Code R) See the below publications for reference regarding where to report contributions: