Rent a room in your home and the IRS has rules for you, including one that makes short rentals tax-free. Here is how the 14-day rule and Schedule E work.

Earning side income with no taxes withheld? Here’s how IRS quarterly estimated payments, the $1,000 rule, and the safe harbor actually work in 2026.

The IRS uses nine factors to decide if your side activity is a business or a hobby. The label decides whether your expenses are deductible at all.

The 2025 tax law restored the $20,000-and-200-transaction 1099-K threshold. What online sellers get in the mail now, and what they owe either way.