Small Business Tax Preparation Checklist For 2025

Doing your taxes as a small business can be stressful, especially if you’re juggling multiple tasks. But with a comprehensive tax checklist, you can simplify the process, avoid costly mistakes, and reduce the stress of filing taxes.

With the tax season just a few months away, now is the perfect time to kick-start your tax preparation. By getting a head start, you can avoid the last-minute rush and ensure a smooth filing process.

Below, we’ll share our ultimate small business tax preparation checklist for 2025 and provide tips for a hassle-free tax season.  

The Ultimate Small Business Tax Preparation Checklist For 2025

This small business tax checklist is the key to achieving a stress-free 2025 tax season. It includes all the information and documentation you must prepare before your business’s filing deadline.

Personal Information

Before you start filling out forms, you must have the following information on hand:

• Your Social Security Number (SSN) or your business’s Employer Identification Number (EIN).
• Your contact information, including your business’s principal business address and phone number.
• Bank account and routing numbers for tax payments.
• Last year’s tax returns.

Business Tax Forms

Once you’ve compiled all your essential information, you must determine which business tax form applies to your business structure. Some of the most commonly used forms for filing business taxes include:

• Form 1040 Schedule C: If you’re a sole proprietor or a single-member LLC owner, you must use Form 1040 and Schedule C to file your taxes.
• Form 1065: If you’re in a partnership, you must submit your personal income tax return with a completed Form 1065.
• Form 1120: If your business is structured as a C corporation, it must use the Form 1120 to report its income
• Form 1120-S: If your business is taxed as an S-corporation, you must submit a Form 1120-S alongside your personal income tax return.

If you have trouble completing your business tax forms, visit the IRS website. Their resource library contains information guides for each form mentioned.

Income Forms

Depending on the nature of your business, you may also have to prepare one of the following income forms:

• W-2 Forms: Reports wages, tips, and other compensation you’ve paid your employees.
• Schedule K-1
• Forms 1099-MISC: Enumerates miscellaneous income, such as rental income, prizes, and other payments not covered by other 1099 forms.
• Form 1099-NEC: Outlines payments your business has made to independent contractors or freelancers for services worth $600 or more.
• Form 1099-DIV: Reports dividends your business made from investments and similar distributions from stocks or mutual funds.
• Form 1099-INT: Any interest income worth over $10 your business made from bank accounts or bonds must be reported in this form.
• Form 1099-B: Any capital gains or losses your business made from selling securities and other investments must be reported in this form.

Quarterly Estimated Tax Payments

Quarterly tax payments cover income not subject to automatic tax withholding, such as earned income from a business, rental earnings, dividends, etc. This tax is typically imposed on freelancers and self-employed independent contractors.

Since small business owners are considered self-employed, you must make estimated tax payments on the following dates:

• January 15, 2025: 2024 Fourth Quarter Estimated Taxes Deadline.
• April 14, 2025: 2025 First Quarter Estimated Taxes Deadline.
• June 16, 2025: 2025 Second Quarter Estimated Taxes Deadline.
• September 15, 2025: 2025 Third Quarter Estimated Taxes Deadline.
• January 15, 2026: 2025 Fourth Quarter Estimated Taxes Deadline.

If the date listed above falls on a holiday or a weekend, the deadline will be moved to the next business day.

Tax Preparation Tips For Small Business Owners

Here are a few other tips you can follow to ensure a stress-free tax season:

Create a filing calendar.

Keeping track of all deadlines can be challenging, so we recommend you create a filing calendar to ensure you don’t miss any important dates.

Your filing calendar should include your quarterly tax payment due dates and the following essential tax deadlines for 2025:

• January 31, 2025: Deadline for submitting W-2 forms to employees and Form 1099s to independent contractors.
• February 28, 2025: Deadline of submission for Form 1099 or Form 1096 returns.
• March 15, 2025: Yearly tax return submission deadline for partnerships, S-corps, and multi-member LLCs.
• March 15, 2025: Deadline for requesting extended filing for partnerships, S-corps, and multi-member LLCs.
• April 15, 2025: Yearly tax return submission deadline for sole proprietorships, C-corporations, and single-member LLCs.
• September 15, 2025: Deadline for partnerships, S corporations, and multi-member LLCs that received extensions on their filings.
• October 15, 2025: Deadline for sole proprietorships, C-corporations, and single-member LLCs that received extensions on their filings.

Gather your documents ahead of time.

Don’t wait until the last minute to gather all of your documents. Dedicate a day when you’ll compile all the documents and other information you’ll need to complete your filings. This way, you’ll have plenty of time to double-check your business’s tax forms.

Keep detailed records of your expenses.

If you plan to claim tax deductions and credits this tax season, you must keep detailed records of your expenses. These can include business-related travel, office supplies, and professional services. You must compile your invoices, receipts, bank statements, and other financial records.

This step will simplify your filing process and serve as vital documentation in case of an audit.

Consult with a tax planner.

Lastly, we suggest you consult a tax planner. Tax planners are professionals trained to help entrepreneurs like you file their taxes. They can help you navigate complex tax laws, identify potential deductions, and ensure your filings are accurate and complete. Not only will they help you prepare for the upcoming tax season, but they will also give you tips on maximizing your deductions.

Enjoy a Smooth Tax Season This 2025

Preparation and organization are the secrets to a smooth tax season. You can enjoy a stress-free filing process if you organize your documents and forms ahead of your deadlines.

But if you want to save time and money, consider working with one of NCH’s tax preparers!

Our tax preparers specialize in corporate and personal tax returns. With years of experience processing and preparing taxes for all fifty states, we can handle even the most complex tax situations.

Whether you’re filing as a small business owner or a freelancer, our team will provide personalized support and guidance tailored to your unique needs.

Don’t let tax season overwhelm you. Contact NCH today and let our expert tax preparers do all the hard work for you!

To learn more, visit our website here or call us at 1-800-508-1729 for a free consultation. 

DISCLAIMER: The above material has been prepared for informational purposes only, containing opinions of the provider and is not intended to provide, and should not be relied on for, tax, legal, or accounting advice. Please consider consulting tax, legal, and accounting advisors before engaging in any transaction.