Ask the Tax Editor, May 15: Deductions for Self-Employed Retirees

Each week in our Ask the Editor series, Joy Taylor, The Kiplinger Tax Letter editor, answers questions on topics submitted by readers. This week, she's looking at four questions on available tax breaks for retirees with a side hustle. (Get a free issue of The Kiplinger Tax Letter or subscribe.)

1. Medicare premiums

Question: I am 72 years old, and I pay monthly Medicare premiums. I retired from my full-time job four years ago. I am now a part-time consultant and file Schedule C, reporting my income and deductions from my part-time gig, with my federal tax return. My financial advisor said I can deduct my Medicare premiums that I pay, even though I don't itemize on Schedule A. Is that true?

Joy Taylor: Yes. As a general rule, medical expenses, including premiums paid for medical insurance and Medicare premiums, are deductible only by itemizers on Schedule A, and only to the extent that total medical expenses exceed 7.5% of adjusted gross income. There is an exception for self-employed individuals who file Schedule C. They can deduct premiums that they pay for medical and dental insurance and qualified long-term-care insurance without itemizing on Schedule A. They claim the self-employed health insurance deduction on Form 1040, Schedule 1, part II, line 17. Parts A, B and D Medicare premiums that you pay for insurance in your name are part of that deduction.

2. Business driving

out expenseQuestion: I retired from my full-time job a few years ago and receive a pension. I decided this year to take on part-time work as a dog walker. I work for myself, and I drive to my clients' homes to walk their dogs. I plan to file Schedule C with my 2026 Form 1040. Can I deduct the standard mileage rate for my business driving?

Joy Taylor: Yes. The cost of business driving for self-employed individuals is a deductible business expenses. You can claim either your actual expenses, including gas, repairs and depreciation on your car, or the IRS's standard mileage allowance. For 2026, the standard mileage rate for business driving is 72.5 cents per mile. If you use the IRS's standard mileage rate, you can also deduct the cost of any tolls or parking fees that you pay.

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Be sure to keep a contemporaneous mileage log detailing each of your dog-walking trips. It will make it much easier for you to figure your total business mileage when you are preparing your tax return. It will also help you if you are ever audited by the IRS. Sloppy recordkeeping makes it easy for an IRS revenue agent to disallow your deduction.

3. Qualified business income deduction

Question: I recently retired from my full-time job, and I am now an independent freelance writer. I plan to file Schedule C with my 2026 Form 1040. Can I claim the 20% qualified business income deduction?

Joy Taylor: Generally, yes. Self-employed people, independent contractors and owners of LLCs, S corporations and other pass-through entities can deduct 20% of their qualified business income (QBI), subject to limitations for individuals with taxable income in 2026 of more than $403,500 for joint filers and $201,750 for single filers and head-of-household filers. This tax break, first enacted in the 2017 Tax Cuts and Jobs Act, was slated to end at the end of 2025. But last summer's "One Big Beautiful Bill" permanently extended the QBI write-off.

Note that you don't claim the QBI deduction on Schedule C. Instead, you would attach Form 8995 or 8995-A to your return and take the write-off on line 13a of Form 1040.

4. Home office

Question: I am a lawyer. I retired five years ago from my law firm. Even though I'm retired, I still do legal work for some clients on a part-time basis. I am an independent contractor now and file Schedule C with my tax return. I recently turned one of the bedrooms in my house into a home office where I can do my work. Can I claim the home office deduction on Schedule C?

Joy Taylor: Yes, if you meet all of the rules for claiming the write-off. Even though employees can't take a deduction for home office expenses, the write-off is available to self-employed people or independent contractors who file Schedule C with their 1040 and use a room or space in their home or apartment exclusively and regularly as their principal place of business. If you qualify for the write-off, there are two ways to figure the deduction. You can allocate your actual costs on Form 8829. Or you can use a simplified option by deducting $5 per square foot of space used exclusively for business, up to 300 square feet, resulting in a $1,500 maximum write-off.

About Ask the Editor, Tax Edition

Subscribers of The Kiplinger Tax Letter, The Kiplinger Letter and The Kiplinger Retirement Report can ask Joy questions about tax topics. You'll find full details of how to submit questions in each publication. Subscribe to The Kiplinger Tax Letter, The Kiplinger Letter or The Kiplinger Retirement Report.

We have already received many questions from readers on topics related to tax changes in the One Big Beautiful Bill, retirement accounts and more. We will continue to answer these in future Ask the Editor roundups. So keep those questions coming!

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