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Overlooked Deductions for Small Business Owners (That Most Preparers Miss)

May 5
3 min read

Small business owners often face a maze of tax rules and deadlines. While many know the common deductions like office supplies and travel expenses, some valuable deductions slip under the radar. Missing these can mean paying more taxes than necessary. This post highlights some overlooked deductions that many tax preparers miss, helping small business owners keep more of their hard-earned money.


Close-up view of a calculator and tax documents on a wooden desk
Tax documents and calculator on desk

Home Office Expenses Beyond the Basics


Many small business owners claim the home office deduction, but often only include direct expenses like a portion of rent or mortgage interest. There are other costs that qualify but are frequently ignored:


  • Home maintenance and repairs: If you fix the part of your home used exclusively for business, those costs can be deducted. For example, repainting your office or repairing a broken window in that room.

  • Utilities and internet: A percentage of your electricity, water, and internet bills can be deducted based on the square footage of your office compared to your home.

  • Depreciation: You can deduct depreciation on the part of your home used for business, which can add up over time.


Many preparers overlook these details because they focus on the simpler calculations. Keep detailed records of all home-related expenses and allocate them carefully.

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Vehicle Expenses That Go Beyond Mileage


Tracking mileage is the most common way to deduct vehicle expenses, but it is not the only method. Some deductions often missed include:


  • Actual expenses method: Instead of using the standard mileage rate, you can deduct actual costs like gas, oil changes, repairs, insurance, and lease payments proportional to business use.

  • Parking fees and tolls: These are deductible when incurred for business purposes.

  • Interest on a car loan: If you finance a vehicle used for business, the interest on the loan may be deductible.


Choosing the right method depends on your situation. Sometimes actual expenses yield a bigger deduction than mileage alone.


Business-Related Education and Training


Investing in your skills can reduce your tax bill, but many miss this deduction. Expenses related to education that improves or maintains your business skills qualify, such as:


  • Tuition for courses related to your trade

  • Books and supplies for training

  • Fees for seminars and workshops

  • Online classes and webinars


For example, a graphic designer taking a course on new software can deduct those costs. Keep receipts and proof that the education relates directly to your business.


Eye-level view of a laptop and notebook with business training materials
Business training materials on laptop and notebook

Health Insurance Premiums for Self-Employed Owners


Self-employed individuals can deduct health insurance premiums for themselves, their spouse, and dependents. This deduction is often missed or underutilized because it is taken on a different part of the tax return than other business expenses.


  • This deduction reduces your adjusted gross income, which can lower your overall tax liability.

  • It applies even if you do not itemize deductions.

  • Premiums for dental and long-term care insurance may also qualify.


Make sure to separate these premiums from other medical expenses and report them correctly.


Retirement Plan Contributions


Contributions to retirement plans for small business owners are a powerful way to reduce taxable income. Many preparers fail to maximize these deductions:


  • SEP IRAs: Allow contributions up to 25% of compensation, with a high limit.

  • SIMPLE IRAs: Easy to set up and allow employee and employer contributions.

  • Solo 401(k): Offers high contribution limits and flexibility.


For example, a sole proprietor earning $80,000 could contribute up to $20,000 or more depending on the plan, reducing taxable income significantly. Consult a financial advisor to choose the best plan.


Business Use of Personal Assets


If you use personal assets for business, you can deduct the business portion of expenses related to those assets. Examples include:


  • Using your personal cell phone for business calls

  • Using your personal computer or software for work

  • Tools or equipment you own personally but use in your business


Keep detailed logs of business use to support these deductions.


High angle view of a smartphone and laptop on a wooden table
Smartphone and laptop on wooden table

Final Thoughts on Overlooked Deductions


Small business owners can save thousands by identifying deductions that many preparers miss. The key is keeping detailed records and understanding which expenses qualify. Review your expenses carefully each year and ask your tax preparer about these less obvious deductions.


Taking the time to explore these options can reduce your tax bill and improve your business’s financial health. Start by tracking your home office costs, vehicle expenses, education, health insurance, retirement contributions, and personal asset use. This approach helps you claim every dollar you deserve.


 
 
 

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