Tax Deadlines Guide

Missing tax deadlines can result in penalties and interest charges, not to mention unnecessary stress. Staying organized and aware of important tax dates throughout the year is essential for both individuals and businesses. This guide covers the key federal and Pennsylvania tax deadlines you need to know.

Federal Tax Deadlines for Individuals

April 15 - Individual Income Tax Return Deadline

The most well-known tax deadline is April 15th (or the next business day if it falls on a weekend or holiday). This is the deadline for filing your federal income tax return (Form 1040) and paying any taxes owed. If you can't file by this date, you can request a six-month extension using Form 4868, but this only extends the filing deadline, not the payment deadline. You must still estimate and pay any taxes owed by April 15th to avoid penalties.

January 15 - Fourth Quarter Estimated Tax Payment

If you're self-employed or have significant income not subject to withholding, you typically make quarterly estimated tax payments. The fourth quarter payment for the previous tax year is due January 15th.

Quarterly Estimated Tax Payments

Estimated tax payments are generally due quarterly:

• Q1: April 15 (for income January 1 - March 31)
• Q2: June 15 (for income April 1 - May 31)
• Q3: September 15 (for income June 1 - August 31)
• Q4: January 15 (for income September 1 - December 31)

Federal Tax Deadlines for Businesses

March 15 - Partnership and S Corporation Returns

Partnerships (Form 1065) and S corporations (Form 1120-S) must file their tax returns by March 15th. This is also the deadline for these entities to provide Schedule K-1 forms to their partners or shareholders. An automatic six-month extension is available by filing Form 7004 for partnerships or Form 7004 for S corporations by the original deadline.

April 15 - Sole Proprietorship and Single-Member LLC Returns

Sole proprietors and single-member LLCs report business income on their personal tax returns using Schedule C, which is filed with their Form 1040 by the April 15th deadline.

April 15 - C Corporation Returns

C corporations (Form 1120) must file by April 15th, or the 15th day of the 4th month after their fiscal year-end. A six-month extension is available by filing Form 7004.

Quarterly Employment Tax Deadlines

Employers have several recurring employment tax deadlines:

• Form 941 (Employer's Quarterly Federal Tax Return): Due by the last day of the month following the end of each quarter (April 30, July 31, October 31, January 31)
• Federal Tax Deposits: Generally due either monthly or semi-weekly depending on your deposit schedule
• Form 940 (Federal Unemployment Tax Return): Due January 31st for the previous year
• W-2 and 1099 Forms: Must be provided to employees/contractors by January 31st and filed with the SSA/IRS by January 31st (or February 28th if filing paper forms)

Pennsylvania State Tax Deadlines

April 15 - Pennsylvania Personal Income Tax Return

Pennsylvania personal income tax returns (Form PA-40) are due April 15th, the same date as federal returns. Pennsylvania also allows for extensions, which mirror federal extension deadlines.

April 15 - Pennsylvania Corporate Net Income Tax Return

C corporations doing business in Pennsylvania must file Form RCT-101 by April 15th (or 15th day of the 4th month after fiscal year-end).

Local Earned Income Tax Deadlines

Local Earned Income Tax (EIT) returns are typically due April 15th. Employers must withhold and remit local EIT quarterly, with deadlines varying by locality.

What Happens If You Miss a Deadline?

Late Filing Penalties

The IRS imposes penalties for late filing, typically 5% of the unpaid tax for each month or part of a month the return is late, up to a maximum of 25%. If your return is more than 60 days late, the minimum penalty is either $485 or 100% of the unpaid tax, whichever is less.

Late Payment Penalties

If you owe taxes and don't pay by the deadline, you'll face a failure-to-pay penalty of 0.5% per month of the unpaid tax, up to 25%. Additionally, interest accrues on unpaid taxes at the federal short-term rate plus 3%, compounded daily.

Pennsylvania Penalties

Pennsylvania also imposes penalties for late filing and late payment, generally similar to federal penalties but with state-specific rates and rules.

Extension Requests

Federal Extensions

Individuals can request a six-month filing extension by filing Form 4868 by the April 15th deadline. Businesses can request extensions using Form 7004. Remember that extensions only extend the filing deadline, not the payment deadline. You must still estimate and pay any taxes owed by the original deadline.

Pennsylvania Extensions

Pennsylvania automatically grants a six-month extension if you have a federal extension and attach a copy of your federal extension to your Pennsylvania return when filed.

Tips for Staying on Track

• Use a Calendar: Add all tax deadlines to your calendar with reminders set for at least two weeks before each deadline
• Organize Documents Early: Start gathering tax documents well before deadlines to avoid last-minute scrambling
• Work with a Professional: Tax professionals can help ensure you meet all deadlines and file accurately
• Set Up Estimated Payments: If you're self-employed, establish a system for making quarterly estimated payments
• Track Business Deadlines Separately: Business owners have additional deadlines beyond individual tax deadlines
• File Early If Possible: Filing early reduces stress and gives you time to address any issues that arise

Special Circumstances

Certain situations may affect your tax deadlines:

• Military Service: Military members serving in combat zones may qualify for extended deadlines
• Natural Disasters: The IRS and states sometimes extend deadlines for taxpayers affected by natural disasters
• Living Abroad: U.S. citizens living abroad automatically get a two-month extension (to June 15) for filing federal returns

Staying on top of tax deadlines is crucial for avoiding penalties and maintaining good financial standing. This guide provides general information about tax deadlines. Deadlines can change, and individual circumstances may vary. For personalized guidance on your specific tax situation and deadlines, please consult a qualified tax professional.