Many sole proprietors assume they can’t deduct personal medical expenses through their business. Traditional insurance options are expensive, and out-of-pocket costs add up quickly. But one small business owner discovered a powerful solution using a Section 105 medical reimbursement plan. By hiring his spouse and following IRS guidelines, he legally turned personal healthcare expenses into business deductions—and saved over $10,000 in a single year.
The Business: A Sole Proprietor With Family Coverage
The business owner was a self-employed graphic designer. He operated as a sole proprietorship and worked from a home office. His wife helped him part-time with bookkeeping, client billing, and admin tasks. Until recently, they paid all their medical expenses with after-tax dollars.
Each year, the family spent over $12,000 on insurance premiums and out-of-pocket healthcare. These included dental work, therapy, and prescriptions for the couple and their two kids. Their CPA introduced a little-known strategy: a Section 105 plan using a spouse-employee arrangement.
This strategy allows sole proprietors to deduct family medical expenses by hiring their spouse as a legitimate employee. The Section 105 plan then reimburses the spouse for medical costs—tax-free.
Setting Up the Spouse-Employee Section 105 Plan
First, the business owner formally hired his wife. They drafted a basic job description covering administrative and financial support. She was paid a small monthly wage via check and issued a W-2 at year-end. She worked around five hours per week on consistent tasks.
Next, they created a written Section 105 plan document. The plan covered the employee (his wife) and her dependents—which legally included the business owner and their children. This allowed full reimbursement for all family medical expenses.
They set a maximum reimbursement limit of $15,000 for the plan year. The couple used a spreadsheet to track receipts and submitted claims monthly. Reimbursements were paid by check from the business account to the spouse and logged as a business expense.
How They Saved Over $10,000 in One Year
During the first year, the family incurred $13,500 in qualified medical expenses. These included insurance premiums, co-pays, prescriptions, dental visits, and therapy. All expenses were reimbursed through the Section 105 plan.
The business deducted $13,500 as a fringe benefit on Schedule C. At a 25% marginal tax rate, that saved $3,375 in income taxes. It also reduced self-employment tax by approximately 15.3%, saving another $2,066. Total federal tax savings: over $5,400.
Additionally, because the reimbursements were not considered taxable income to the spouse, the family avoided tax on that money. At their income level, that preserved another $3,375 in value.
Combined with state tax savings and reduced net income subject to SE tax, total savings easily exceeded $10,000. All achieved legally, with proper documentation, and without switching business structures.
Why This Strategy Works for Sole Proprietors
Sole proprietors cannot receive tax-free reimbursements directly under a Section 105 plan. However, their spouse can—if employed by the business. The plan must be set up in the spouse’s name, and the spouse must be a bona fide employee.
This means the spouse must perform actual work, receive compensation, and follow employment rules. With these requirements met, the Section 105 plan can reimburse the spouse for family medical expenses. This includes the business owner and any dependent children.
The IRS allows this because the spouse is the employee, and the owner is a dependent of the employee. It’s a perfectly legal structure—used correctly, it unlocks huge tax advantages.
Compliance Tips and Lessons Learned
The business owner learned early that documentation is everything. He kept time logs, job descriptions, and reimbursement receipts. He also paid his spouse a wage through payroll software and filed W-2s on time.
The plan document was simple but critical. It included all required IRS language, eligibility details, and claim procedures. Reimbursements were never made before the plan was adopted or without proper receipts.
Their CPA advised treating the arrangement like any normal employment relationship. That meant avoiding shortcuts and maintaining clear records. With these safeguards in place, the IRS would have little reason to challenge the deductions.
| Category | Details |
|---|---|
| Business Structure | Sole Proprietorship |
| Strategy Used | Hired spouse as a legitimate employee and set up a Section 105 Plan |
| Plan Coverage | Spouse (employee), sole proprietor (as dependent), and children |
| Annual Medical Expenses | $13,500 |
| Federal Income Tax Savings | $3,375 (25% of $13,500) |
| Self-Employment Tax Savings | $2,066 (15.3% of $13,500) |
| Tax-Free Benefit Value | $3,375 (reimbursements not taxed to spouse) |
| Total Estimated Savings | Over $10,000 |
| Key Requirements Met | Formal plan document, spouse on payroll, W-2 issued, documented reimbursements |
| Outcome | Personal medical expenses became deductible business expenses legally and efficiently |
Conclusion
For sole proprietors, a Section 105 plan using a spouse-employee strategy is a game-changing tax tool. This real-life example shows how one business owner turned personal healthcare costs into deductible business expenses—and saved over $10,000 in a single year. With proper setup, documentation, and compliance, you can do the same. If you’re self-employed and paying out-of-pocket for medical expenses, it’s time to explore this powerful and legal strategy.
