1099s are an IRS form due each year by January 31st.Who your startup needs to give this tax form to depends on how much you’ve paid your cash-basis contractors during the previous year, and what type of contractor they are. Specifically, anyone who is not a corporation and was paid over $600 in aggregate will need to get a 1099.So LLCs and sole proprietors (often contractors like marketing contractors, some lawyers, and landlords), paid over $600 during the previous year, will require a 1099. If you are unsure what type of contractor you have been working with, have your startups send them a W-9 to complete.Remember, 1099s are due by January 31st, and your startup must provide one to any non-corporation you paid over $600 in the previous year.