Seven Deductions Small Business Owners Routinely Miss

When small business owners overpay on taxes, it is almost never because they failed to find some exotic loophole. It is because they did not track ordinary expenses that were always deductible.

Here are seven that quietly add up every year.

1. Home office expenses

If you work from home and have a space used regularly and exclusively for business, you can deduct a portion of your rent or mortgage interest, utilities, internet, insurance, and depreciation. The simplified method allows $5 per square foot up to 300 square feet, with no documentation beyond the square footage. The regular method requires more record keeping but often yields a larger deduction.

2. Business use of your phone and internet

If you use your personal phone or home internet for business, the business portion is deductible. A reasonable percentage estimate (for example, 60 percent business use) is usually defensible if you can explain how you arrived at it.

3. Vehicle mileage for business trips

Every business mile is deductible at the IRS standard mileage rate (around 70 cents per mile in recent years). Most people forget to log trips to client meetings, the bank, the post office, supply runs, and networking events. A simple mileage tracking app pays for itself many times over.

4. Health insurance premiums

Self-employed business owners can deduct 100 percent of health insurance premiums for themselves, their spouse, and dependents. This is an above-the-line deduction that reduces adjusted gross income directly.

5. Retirement contributions

Contributions to a SEP-IRA or Solo 401k reduce your taxable business income dollar for dollar. Many business owners assume they cannot afford a retirement contribution and end up handing the same money to the IRS instead.

6. Continuing education and professional development

Books, courses, conferences, certifications, and professional memberships that are directly related to your business are fully deductible. This includes software you use to do your work and software you use to learn how to do your work better.

7. Bank fees and merchant processing fees

Every Stripe fee, PayPal fee, Square fee, and bank service charge you pay is deductible. These tend to be ignored because each one is small, but they add up to real money over a full year, especially if you process a lot of transactions.

The common thread

None of these are aggressive tax strategies. They are ordinary business expenses that the IRS has always allowed. They go missed because the business owner did not track them in real time and could not reconstruct them at year end.

Clean monthly bookkeeping changes this entirely. When every expense gets categorized as it happens, the deductions are already organized when tax time arrives. Your CPA does not have to ask. Your records already show.

Talk to your CPA about which of these apply to your situation. If your books are organized, the conversation takes ten minutes. If they are not, it takes a week and you probably miss something.