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IRS & compliance · Sep 19, 2026

2026 Quarterly Estimated Tax Dates: Form 1040-ES Calendar Through January 15, 2027

For tax year 2026, calendar-year Form 1040-ES installments are due April 15, June 15, and September 15, 2026, and January 15, 2027. As of mid-September, the next federal date for most filers is January 15—skip it only if you file and pay the full 2026 balance by February 1, 2027.

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