Self-Employment Tax and Retirement: FICA, SE Tax, and How to Reduce It

Sandra retired from corporate marketing at 61 and immediately started consulting. Her first year, she earned $95,000 in consulting income. She was expecting a large tax bill — but when her accountant showed her the Schedule SE, she was surprised by what she saw.

On top of federal and state income taxes, she owed an additional $13,413 in self-employment tax. Nearly 14% extra on top of everything else.

"I knew about income tax," she said. "I didn't fully understand this."

The self-employment tax is one of the most significant tax differences between W-2 employment and self-employment. For retirees who consult or freelance — which is increasingly common — understanding it is essential to keeping net income where you expect it to be.

What the SE Tax Actually Is

When you're a W-2 employee, you pay half of Social Security and Medicare taxes. Your employer pays the other half. It's invisible because the employer handles their portion before you ever see your paycheck.

When you're self-employed, you pay both halves:

The SE tax applies to net self-employment income — gross income minus deductible business expenses.

2026 SE Tax Base:

• Social Security portion (12.4%): applies to first $170,400 in net SE income (approximate 2026 wage base — indexed annually)
• Medicare portion (2.9%): applies to all net SE income
• Additional Medicare surtax (0.9%): applies to SE income above $200,000 (single) / $250,000 (MFJ)

One small break: You can deduct half of your SE tax as an above-the-line deduction on your income tax return. This doesn't reduce the SE tax itself, but it reduces your adjusted gross income.

How SE Income Interacts With Social Security Benefits

Here's something that surprises many consultant-retirees: if you're already claiming Social Security and under Full Retirement Age, earnings test applies to SE income.

The 2026 earnings test limit for those under FRA: $22,320/year. If your self-employment income exceeds this, Social Security withholds $1 for every $2 over the limit.

But once you reach FRA, SE income has no effect on your Social Security benefit amount. You can earn any amount without reduction.

If you're not yet claiming Social Security, here's the positive side: SE income adds to your Social Security earnings record. If you have lower-earning years in your 35-year history, additional SE income can incrementally increase your future benefit.

How to Reduce SE Tax Legally

1. Maximize Business Expense Deductions

The SE tax applies to net SE income. Every legitimate business deduction reduces not just income tax but also SE tax.

Commonly overlooked self-employed deductions:

• Home office (dedicated space used regularly and exclusively for business)
• Health insurance premiums (self-employed can deduct 100% above-the-line)
• Professional development, subscriptions, publications
• Business portion of phone and internet
• Business travel and transportation
• Self-employed retirement plan contributions (reduce income tax, not SE tax itself)

The health insurance deduction is particularly valuable — if you're paying $15,000/year in premiums and not covered by an employer plan, that's a full deduction.

2. SEP-IRA or Solo 401(k) Contributions

Retirement plan contributions reduce taxable income significantly. A consultant earning $95,000 can contribute up to 25% of net SE income to a SEP-IRA (approximately $18,588 in this case) or up to $24,000 (the 2026 elective deferral) plus employer match in a Solo 401(k).

Important: these contributions reduce income tax, but not the SE tax base. The SE tax is calculated on net SE income before the retirement plan deduction.

However, the income tax savings are substantial — a $20,000 retirement contribution in the 22% bracket saves $4,400 in income tax.

3. S-Corporation Structure

The most aggressive (and complex) legal strategy: converting from a sole proprietorship or single-member LLC (taxed as sole prop) to an S-Corporation.

How it works:

• S-Corp earns consulting revenue
• You (as owner-employee) pay yourself a "reasonable salary"
• The salary is subject to FICA/SE taxes
• Remaining profit is distributed to you as a shareholder distribution
• Distributions are not subject to SE tax

Example:

• Consulting income: $120,000/year
• As sole prop: SE tax on $120,000 = $16,955
• As S-Corp with $60,000 salary: FICA on $60,000 = $9,180; distribution of $60,000 has no SE tax
• SE tax savings: approximately $7,775/year

The tradeoff: S-Corp compliance costs (separate filing, payroll requirements, reasonable salary scrutiny) typically run $2,000–$5,000/year. The math works at income levels above roughly $80,000–$100,000 in net SE income.

4. Part-Time vs. Passive Structures

If your consulting has evolved to a point where you're primarily providing capital (royalties, licensing) rather than active labor services, the income may not be subject to SE tax. This requires careful structuring and tax advice — passive income vs. active SE income is a distinction the IRS scrutinizes.

Planning the Year Ahead

For retirees consulting in 2026, a few year-end planning moves:

• Make retirement plan contributions before year-end (SEP-IRA can be funded through the extended tax deadline)
• Review whether your business structure is tax-optimal at your income level
• Calculate your estimated SE tax for Q4 and ensure your payments are current
• Track health insurance premiums for the above-the-line deduction

Self-employment in retirement provides real income, professional engagement, and Social Security credit. Understanding the SE tax is what separates consultants who keep what they earn from those who are perpetually surprised by their April bill.

Connect with a retirement and tax advisor who works with self-employed clients and can structure your consulting income efficiently.