09/02/2026
If you became a 1099 contractor this year, here are three things worth checking before Q4 begins.
First: are your estimated payments on track? September 15 is the third of four quarterly deadlines. If you've been guessing or skipping, the IRS will assess a penalty regardless of what you owe at filing.
Second: how is your business structured? A single-member LLC is taxed identically to a sole proprietorship by default. An S-Corp election addresses the self-employment tax problem but the 2026 window for that election has passed for most people. September is the right time to understand your options and position yourself to act for 2027.
Third: what are you deducting? Home office, equipment, phone, mileage, software, professional development and others are business expenses that reduce the income your self-employment tax is calculated on. Most new contractors leave this money behind simply because they've never had to track it before.
September is still early enough to make these moves matter.