Can I pay estimated taxes after Jan. 15?

You can postpone the quarterly Jan. 15 estimated tax payment until Jan. 31 if you file your return and make any necessary payments by that date. If you can’t make an estimated payment, you might be subject to a penalty with interest.

You might owe a penalty if the total of withholding and estimated tax payments you made didn’t equal at least the smaller of:

• 90% of your 2025 tax
• 100% of your 2024 tax (Your 2024 return must cover a 12-month period.)