Estimated Tax Payments 2024 Safe Harbor 2024. Your 1040 and first (q1) payment for 2024 estimated taxes is april 15, 2024. If you don’t pay enough tax, either through withholding or estimated tax, or a combination of both, you may have to pay a penalty.

Safe harbor can be applied to estimated taxes giving you some leeway in how much you need to pay. Receives income that isn’t from an employer, such as interest, dividends, alimony, capital.