Q2 2026 Estimated Tax Deadline

Monday, June 15, 2026 is the Q2 2026 estimated tax deadline.

If you expect to owe the IRS and/or Illinois $1,000 in April of next year, you are supposed to make quarterly estimated tax payments. If you don't, you will be subject to the estimated tax penalty.

Please reach out to Wilson CPA Services if you would like help estimating your tax liability for 2026, figuring out whether you should make these payments and what amount.