12 Commonly Missed Tax Deductions for U.S. Business Owners

Tax season can be overwhelming for business owners. Amid the forms, deadlines, and regulations, there are many overlooked tax deductions that can significantly reduce your taxable income. Missing an expense here or there could cost you a few hundred dollars, but missing several tax deductions could cost you thousands of dollars each year.

Understanding which itemized deductions apply to your business and maintaining proper records of all expenses and out of pocket costs to help you deduct expenses is crucial. Otherwise you’ll end up paying more federal, state and local taxes than you should.

Table of Contents

    Why Do Business Owners Miss Tax Deductions?

    Many business owners fail to claim eligible deductions due to lack of awareness or poor record-keeping. Here are some common reasons deductions get overlooked:

    So, let’s explore 12 of the most commonly missed itemize deductions, how they reduce your tax burden, and steps you can take to capture them. This guide will help you identify and maximize commonly missed tax credits and itemized deductions.

    Tax Deduction #1: Education and Training

    Investing in your professional development is not just a business benefit—it’s also a tax deduction. Whether you’re attending a webinar, enrolling in a workshop, or buying industry-specific books, these expenses qualify for a tax credit as business-related education.

    This deduction is claimed on Schedule C (Form 1040) for self-employed individuals.

    What’s Tax Deductible:

    Common Mistake:

    Failing to distinguish between professional development and personal education. For example, classes unrelated to your business or career training are not tax deductible.

    How to avoid missing this deduction:

    Tax Deduction #2: Software and Subscriptions

    In today’s digital age, business owners rely heavily on tools and software to streamline operations. But every tax year, these small, recurring expenses are among the most common tax deductions missed.

    These deductions are reported on Schedule C (Form 1040) under ‘Other expenses.’

    What’s Tax Deductible:

    Common Mistakes:

    Using personal payment methods for business-related software and forgetting to record these transactions.

    How to Avoid Missing This Deduction:

    Tax Deduction #3: Internet and Cell Phone Expenses

    For business owners who operate from home or use personal devices for work, it’s easy to miss out on a standard deduction for internet and phone services. Sure, you can’t claim personal usage, but the portion you use for business is deductible.

    What’s Tax Deductible:

    Common Mistake:

    Claiming 100% of these expenses without adequate justification can raise red flags with the IRS.

    How to Avoid Missing This Deduction:



    Tax Deduction #4: Mileage and Vehicle Expenses

    If you drive for business—whether to meet clients, attend networking events, or run errands—you can deduct vehicle-related costs.

    For 2024, the standard mileage rate is $0.67 per mile driven for business use.

    What’s Tax Deductible:

    Common Mistake:

    Failing to log miles or relying on rough estimates, which can disqualify your claim during an audit.

    How to Avoid Missing This Deduction:

    Tax Deduction #5. Payment Processing Fees

    Every time you accept a payment through platforms like PayPal, Stripe, or Square, a small percentage is deducted as a processing fee. Over the course of a full tax year, these fees can amount to significant deductions and reduce your tax obligation.

    Merchant fees are a deductible business expense for businesses but not for individuals. This deduction is reported on Schedule C (Form 1040) under ‘Other expenses.’

    What’s Tax Deductible:

    Common Mistake:

    Not accounting for processing fees when recording revenue. For example, if a client pays $500 but you only receive $482 after fees, your income should be recorded as $500 with a $18 deduction for fees.

    How to Avoid Missing This Deduction:

    Tax Deduction #6: Digital Downloads and Supplies

    Purchases like stock photos, templates, or design assets are easy to overlook, especially when made sporadically and by different people on your team (if you have employees). However, these digital products are essential business expenses that are a pretty standard deduction.

    What’s Tax Deductible:

    Common Mistake:

    Failing to track or categorize small, one-time purchases.

    How to Avoid Missing This Deduction:

    Tax Deduction #7: Home Office Expenses

    If you operate your business from home, you may be eligible to claim itemized deductions for a portion of your household expenses. The home office is often one of the most misunderstood and under utilized tax breaks for business owners.

    What’s Tax Deductible:

    Common Mistake:

    Not using the home office exclusively for business purposes. IRS rules require the space to be regularly and exclusively used for work.

    How to Avoid Missing This Deduction:

    Tax Deduction #8: Advertising and Marketing Costs

    Investing in advertising and marketing is crucial for business growth, but these expenses are often overlooked when tax season rolls around. From traditional advertising to digital campaigns, these costs are fully deductible and can add up to significant savings.

    What’s Tax Deductible:

    Common Mistake:

    Failing to track small, recurring advertising expenses like boosted social media posts or monthly ad subscriptions.

    How to Avoid Missing This Deduction:

    Tax Deduction #9: Professional Services

    Whether you hire an accountant, consult a lawyer, or work with a business coach, professional service fees are not only necessary but also deductible. These services support your business operations and provide expertise that’s critical to success.

    What’s Tax Deductible:

    Common Mistake:

    Overlooking one-time fees or mixing personal and business consulting services in your records.

    How to Avoid Missing This Deduction:

    Tax Deduction #10: Bank and Credit Card Fees

    Small fees from your bank or credit card company can add up quickly, but they’re easy to miss when reviewing your financial statements. These costs are fully deductible and can help offset your total taxable income.

    What’s Tax Deductible:

    Common Mistake:

    Failing to review bank and credit card statements for small but recurring fees.

    How to Avoid Missing This Deduction:

    Tax Deduction #11: Health Insurance Premiums

    For self-employed individuals, health insurance premiums represent a major expense that’s often deductible. This includes premiums for yourself, your spouse, and dependents under specific conditions.

    What’s Tax Deductible:

    Common Mistake:

    Assuming this deduction applies only to employees, or not meeting the eligibility criteria.

    How to Avoid Missing This Deduction:

    Tax Deduction #12: Charitable Contributions

    If your business makes charitable donations, these contributions can be deducted under specific conditions. Whether it’s cash, goods, or services, giving back can also give your tax return a boost.

    What’s Tax Deductible:

    Common Mistake:

    Failing to verify the nonprofit’s tax-exempt status or not keeping proper records of contributions.

    How to Avoid Missing This Deduction:

    Tips to Capture Commonly Missed Deductions

    1. Use accounting software: Tools like FreshBooks simplify expense tracking and reporting.
    2. Maintain detailed records: Save receipts, invoices, and bank statements for all transactions.
    3. Work with a tax professional: A CPA or tax advisor can help you identify deductions specific to your industry.
    4. Review IRS guidelines annually: Tax laws change frequently, so stay informed about new deductions and limits.

    The Difference Between a Deduction and Tax Credit

    Both deductions and tax credits can significantly reduce your federal, state and local tax bill, but they work in fundamentally different ways. Whether they apply to federal or state income taxes, knowing the difference can help you maximize your tax savings and lower your tax liability.

    What Are Business Tax Deductions?

    What Are Business Tax Credits?

    Common Mistakes:

    Overestimating the impact of deductions or failing to explore available tax credits. Many business owners only focus on deductions and miss out on lucrative credits.

    How to Maximize Both:

    Why This Matters:

    Combining deductions and credits is a powerful strategy for reducing your tax liability. For example, if your taxable income drops from $100,000 to $80,000 due to deductions, and you qualify for a $5,000 tax credit, your overall tax savings could be thousands of dollars.

    Understanding and utilizing both deductions and credits ensures you take full advantage of the tax code to retain more of your hard-earned revenue.

    Personal Tax Deductions That Can’t Be Claimed by a Business


    Businesses enjoy a wide array of deductions for expenses related to their operations, however there are some tax deductions that individuals can claim on their personal taxes but are not applicable as business expenses.

    While there’s fear when it comes to overlooked tax deductions, understanding which deductions are personal can help prevent mistakes when filing, and ensure you’re maximizing tax savings on both your personal and business returns.

    What’s Deductible Personally (But Not for a Business):

    1. Student loan interest paid

    2. Mortgage interest paid

    3. Charitable contributions

    4. Medical and dental expenses

    5. Personal property tax

    6. State and local taxes (SALT)

    7. Home office deduction (for personal use)

    8. Casualty and theft losses (personal property)

    9. Childcare expenses

    Common Mistake:

    Many business owners mistakenly attempt to deduct personal expenses as business expenses, particularly when using their home for both personal and business purposes. For instance, trying to claim mortgage interest on your personal home office is a common error.

    How to Avoid These Mistakes:

    Separate business and personal expenses: Keep clear boundaries between your business and personal finances, using separate accounts and credit cards.

    Track deductions carefully: Familiarize yourself with the difference between business and personal deductions and consult with a tax professional if you’re unsure.

    Stay informed: Tax laws change regularly, which leads to incorrectly claimed and overlooked tax deductions, so be sure to review the most current income tax code or work with an income tax expert to avoid missing eligible deductions.

    Why This Matters:

    By understanding which income tax deductions are personal and which apply to business, you can avoid costly mistakes and ensure that you’re only claiming what is allowed. This can save you time, money, and potential headaches down the line, especially if you’re audited by the IRS. Being meticulous about where and how you apply your deductions will ultimately maximize your income tax benefits across both personal and business returns.

    Get Your Biggest Tax Refund Yet


    Missing out on overlooked tax deductions can cost your business dearly. By staying organized and proactive, you can capture commonly missed tax deductions and ensure you’re not overpaying. Whether it’s tracking your mileage, categorizing software subscriptions, or claiming home office expenses, each standard deduction adds up to significant savings.

    Running a business comes with tons of costs, but leaving money on the table because of missed deductibles or not identifying expenses incurred is something you can’t afford.

    Remember income tax professionals know tax law well, can help ensure compliance, will maximize your returns, help lower your tax bill, and ensure you get a tax break at tax time.

    Don’t let missed itemized deductions eat into your hard-earned profits!

    This post was updated in November 2024.

    about the author

    CPA and Freelance Contributor

    Janet Berry-Johnson is a freelance writer and certified public accountant (CPA) with over a decade of experience working on both the tax and audit sides of an accounting firm. She’s passionate about helping people make sense of complicated tax and accounting topics.

    Janet's work has appeared in Business Insider, Forbes, and The New York Times, and on LendingTree, Credit Karma, and Discover, among others. You can learn more about her work at jberryjohnson.com.

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