The "Un-Retirement" Strategy: Consulting, Cash Flow, and Tax Control
by Danielle Woods
Retirement used to be a binary switch. One day you were working; the next day you weren't. You got a gold watch, a pension, and you went fishing.
But for the clients I work with today, that light switch concept rarely applies. I work with many retirees like Nora. Nora is financially responsible. Her home is paid off, she has no debt, and she has built a solid nest egg. But Nora has a problem that isn't about numbers—it's about peace of mind.
Nora worries. She asks me, “What if I live to be 95? Will I run out of money? What if long-term care costs wipe me out?”
To alleviate that anxiety—and frankly, to keep her brilliant mind active—Nora is considering "un-retiring" slightly. She’s thinking about taking on a few consulting projects in her former field. It’s not a full-time job; it’s a "work-optional" life.
While this is great for her mental health and her bank account, it creates a new puzzle: Taxes.
As an attorney and advisor, I love these puzzles. When you add consulting income to Social Security and investment withdrawals, you can accidentally trigger a tax avalanche. But if you plan correctly, you can use that new income to actually improve your long-term security.
The Tax Trap of Earning in Retirement
If Nora earns $50,000 consulting this year, that money stacks on top of her other income.
Social Security Taxation: It might push more of her Social Security benefits into the taxable status.
IRMAA Surcharges: In 2026, if a single filer’s income goes over $109,000, their Medicare Part B premiums jump. Nora might find her consulting gig costing her more in health insurance.
Tax Brackets: It could push her capital gains from 0% to 15%.
So, how does Nora earn money without wrecking her tax plan? She needs a shelter.
Enter the Small Business Retirement Plan: The Consultant’s Best Friend
Many retirees think they are done with retirement contributions. They aren't.
If Nora is self-employed (receiving 1099 income), she can open her own retirement plan such as a Simplified Employee Pension (SEP) IRA or an Individual 401(k). This is a superpower for the "work-optional" retiree.
In 2026, the contribution limit for a SEP IRA is incredibly high: $72,000 (or up to roughly 20% of net income, whichever is higher). For the Individual 401(k), she can make a participant contribution of up to $32,500 of her net earnings PLUS an employer match comparable to the SEP deposit max depending on her net income.
Here is the strategy: Nora earns the consulting fees. She doesn't need all that cash to live on (she has her nest egg for that). So, she contributes a significant portion of that consulting income directly into the SEP IRA or her Individual 401(k) pretax.
The Result:
Tax Deduction: Every dollar she puts in lowers her taxable income for the year.
IRMAA Protection: By lowering her Adjusted Gross Income (AGI), she might stay under the $109,000 threshold, keeping her Medicare premiums low.
Legacy Building: Since she doesn't need to spend this money, it grows tax-deferred. She can later leave it to her children, addressing her goal of helping the next generation.
Hobby vs. Business: Staying on the Right Side of the IRS
Nora has to be careful, though. To use these tools, she must be running a legitimate business, not just a hobby.
If she is just doing this casually and not tracking expenses or intent, the IRS might classify it as a hobby. You cannot contribute to a SEP IRA with hobby income, and you cannot deduct expenses.
My background in law and tax taught me that the "logistics" of life—how you classify your income, how you structure your accounts—are just as important as how you invest. My mother’s sudden passing taught me that preparation is the greatest gift you can give your family. By treating her consulting as a real business, Nora isn't just earning money; she’s building a stronger fortress around her future.
You Can Keep Working Without the Tax Headache
Going back to work on your own terms should feel empowering, not taxing. If you are thinking about running your own business post-retirement, let’s run the numbers first.
We can help you determine if a SEP IRA, an Individual 401(k), or another tool is the right way to protect your new income and your existing nest egg.