What is a Schedule K-1, and what should I know before investing in an MLP or partnership?

A Schedule K-1 is the tax form you receive when you own a stake in a partnership, including master limited partnerships (MLPs), some private funds, and certain real estate deals. Instead of a simple 1099, the K-1 reports your share of the entity's income, deductions, credits, and distributions, which you copy onto your own return. Two headaches: K-1s often arrive late – sometimes in March, forcing you to extend your filing – and they can create taxable income in multiple states and even unrelated business taxable income (UBTI) if held in an IRA. MLPs can offer attractive yields with tax-deferred distributions that reduce your basis, but the paperwork is real. Many investors avoid MLPs in retirement accounts entirely and weigh whether the yield justifies the complexity in a taxable account.