5 Critical Tax Filing Deadlines for 2025
- April 15, 2025 - Individual tax returns and first quarter estimated payments
- June 17, 2025 - Second quarter estimated tax payments due
- September 16, 2025 - Third quarter estimated payments and extended returns
- October 15, 2025 - Final deadline for extended individual returns
- January 15, 2026 - Fourth quarter estimated payments for 2025 tax year
Missing these deadlines can result in penalties ranging from 0.5% to 25% of your unpaid taxes. Set calendar reminders and consider automatic payments to avoid costly mistakes.