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Tax Planning

Business Tax Deductions You Might Be Missing

A practical checklist of commonly overlooked deductions that lower your taxable income.
5 min read · Updated January 2026

A deduction reduces your taxable income, which means every legitimate one you miss is money left on the table. Here are deductions businesses most often overlook.

Commonly missed deductions

  • Home office, a regular, exclusively-used workspace can qualify for a proportional deduction of rent, utilities, and more.
  • Vehicle use, track business mileage or actual expenses for business driving.
  • Startup costs, a portion of pre-launch expenses is deductible in your first year.
  • Self-employed health insurance, premiums for you and your family may be deductible.
  • Retirement contributions, SEP-IRA and Solo 401(k) contributions are powerful, deductible savings.
  • Professional development, courses, certifications, and industry subscriptions.
  • Bank and merchant fees, small recurring charges add up over a year.
  • Software and subscriptions, the tools you run your business on.

The rule of thumb

To be deductible, an expense must be ordinary (common in your industry) and necessary (helpful and appropriate for your business). Personal expenses don’t qualify, which is why clean record keeping and separate accounts matter.

Don’t overreach

Aggressively claiming questionable deductions invites scrutiny. The goal is to claim everything you’re entitled to, no more, no less, and to document it well.

Want to be sure you’re capturing every deduction? Our tax planning team reviews your full picture. Book a consultation.

Turn a possible deduction into a reviewable record

Instead of sending a list labeled miscellaneous expenses, group costs by purpose and attach the supporting records. Explain mixed business and personal use, reimbursements, and unusual purchases. Your preparer can then evaluate the facts rather than guess from a merchant name. Do not buy something only because it might be deductible: the cash cost and business need still matter.

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General educational information, not an individual tax opinion. The applicable year, jurisdiction, and facts must be reviewed before acting.

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