Important Tax Deadlines: What You Need to Know

Tax deadlines apply to more than just individual tax returns.If you own a business — especially an LLC or S-Corp - there are separate and earlier deadlines that are easy to miss.

This article outlines the most common individual and business tax deadlines, what they apply to, and why they matter.

🟢 INDIVIDUAL TAX FILING DEADLINE

For most individuals, the main federal tax deadline is in mid-April each year.

This deadline generally applies to:

🔹 Filing your individual income tax return

🔹 Paying any tax owed for the year

Filing and paying are related but separate. Even if you cannot pay in full, filing on time still matters.

🟢 INDIVIDUAL TAX EXTENSIONS

If you are not ready to file by the April deadline, you can request an extension.

An extension:

🔹 Gives you more time to file your return

🔹 Does not give you more time to pay taxes owed

With an extension, the filing deadline usually moves to mid-October.

If you expect to owe tax, making an estimated payment by the original deadline helps reduce interest and penalties.

🟢 LLC TAX DEADLINES (IMPORTANT DISTINCTIONS)

LLC deadlines depend on how the LLC is taxed, not just the fact that it is an LLC.

🔹 Single-Member LLC (Default Taxation)

A single-member LLC taxed as a sole proprietorship does not have a separate federal filing deadline.

Key points:

🔹 Business activity is reported on the owner’s individual return🔹 The deadline follows the individual April filing date

🔹 Estimated tax payments may still apply

🔹 Multi-Member LLC (Partnership Taxation)

An LLC taxed as a partnership has an earlier deadline.

Key deadlines:

🔹 Partnership tax return due in mid-March

🔹 Extension moves the deadline to mid-September

Even if no tax is owed at the entity level, filing is still required.

🟢 S-CORP TAX DEADLINES

S-Corporations have one of the earliest deadlines, which often surprises business owners.

Key deadlines:

🔹 S-Corp tax return due in mid-March

🔹 Extension moves the deadline to mid-September

Important notes:

🔹 The S-Corp files a separate tax return

🔹 Owners receive K-1s used to prepare their personal returns

🔹 Missing this deadline can delay personal filings and create penalties

🟢 BUSINESS EXTENSIONS: WHAT THEY DO

Business extensions:

🔹 Give more time to file the return

🔹 Do not extend time to pay certain taxes

🔹 Must be filed by the original business deadline

Extensions are common and often necessary, but they must be filed on time.

🟢 ESTIMATED TAX PAYMENT DEADLINES

Estimated taxes apply to many business owners and self-employed individuals.

These payments are typically due:

🔹 Four times per year

🔹 On a quarterly schedule

Estimated payments are required if income is not subject to withholding.

Missing estimated payments can result in penalties even if the annual return is filed on time.

🟢 PAYROLL AND INFORMATION RETURN DEADLINES

Businesses may also have recurring deadlines for:

🔹 Payroll tax filings

🔹 Employment tax deposits

🔹 Forms such as 1099s and W-2s

These deadlines are separate from income tax returns and should be tracked independently.

🟢 STATE TAX DEADLINES

State deadlines often follow the federal calendar, but not always.

Important considerations:

🔹 Business entities may have separate state deadlines

🔹 Extensions often must be filed separately

🔹 State penalties may apply even if federal deadlines are met

State requirements vary and should be reviewed carefully.

🟢 WHAT HAPPENS IF A BUSINESS DEADLINE IS MISSED?

Missing a business deadline can result in:

🔹 Late-filing penalties

🔹 Delays in issuing K-1s to owners

🔹 Complications with personal tax returns

🔹 Increased administrative burden

Filing as soon as possible usually limits the impact.

🟢 A PRACTICAL WAY TO STAY ON TRACK

Many individuals and business owners stay compliant by:

🔹 Tracking personal and business deadlines separately

🔹 Filing extensions when needed

🔹 Making estimated payments throughout the year

🔹 Working with a tax professional for planning

Deadlines are easier to manage when planned for in advance.

🟢 NEED HELP WITH TAX DEADLINES?

Tax deadlines vary based on income sources, entity type, and filing history.

At Pacific Data, we help clients:

🔹 Identify which deadlines apply to them

🔹 File individual and business extensions correctly

🔹 Avoid late-filing penalties

🔹 Coordinate business and personal tax filings

If you’re unsure which deadlines apply to your situation, we’re happy to help.