6 Things to Check on Your K-1 Before You File Your Personal Return
Sam's List Editorial | 2026-07-29
6 Things to Check on Your K-1 Before You File Your Personal Return Most people treat a Schedule K-1 like a piece of mail they are not qualified to open. It arrives, they forward it to whoever does their return, and they find out what it meant in April. That is how expensive errors survive. A K-1 is prepared by someone else's accountant, working from someone else's books, and it lands on your personal return whether or not it is right. Knowing what to check on your K-1 takes about ten minutes and it is the only chance you get to catch a problem before the IRS has your signature on it. Here are the six places errors actually hide. What a K-1 Is Doing on Your Return A Schedule K-1 reports your share of a partnership's or LLC's income, deductions, credits and distributions. The entity itself usually pays no federal income tax. Instead each item passes through to you and lands on your Form 1040, in the specific character it had at the entity level. That last part is why the boxes matter more than the total. 1. Which Box Your Income Landed In Box 1 is ordinary business income. Box 2 is net rental real estate income. Box 3 is other net rental income. These are not interchangeable, and a bookkeeper who lumps them together changes your tax answer. Rental income generally follows a different set of loss rules than operating income, and it usually behaves differently for self-employment tax. If your partnership owns a building and runs a business, and everything showed up in Box 1, ask why. The correction is easy in July and painful in a notice two years later. The limitation worth naming: box placement is a judgment call in some fact patterns, so a mismatch is a question to ask, not automatically an error to report. 2. Your Capital Account, and the Basis It Does Not Tell You Part II, Item L shows your capital account on a tax basis: beginning balance, contributions, current-year income or loss, withdrawals, ending balance. Read it. If the ending capital account moved in a direction you cannot explain, something got posted to your account that you did not agree to. Then note what Item L is not. Your capital account is not your outside basis, and the K-1 does not compute outside basis for you. Basis is your own record to keep, adjusted for contributions, your share of income and loss, distributions and your share of partnership debt. This matters because of two rules. Under IRC section 704(d) you generally cannot deduct a loss larger than your basis; the excess is suspended, not lost. And a cash distribution that exceeds your basis generally produces taxable gain...
