How a Solo Concierge Physician Projected $15K–$20K in Annual Tax Savings Before Merging His Practice

The Challenge

Dr. Nathan Cole runs a solo concierge medicine practice. His patients pay a membership fee in exchange for direct access and longer visits. Revenue had grown well past the point where the practice's structure still made sense, but the tax setup had stayed where it started.

He came to Gelt with a few gaps that were costing him money:

• The practice was still taxed as a sole proprietorship, so all of its profit was exposed to self-employment tax
• No quarterly estimated tax plan, which led to about $700 in underpayment penalties the prior year
• Bookkeeping that had fallen behind, making it hard to see what the practice earned
• A planned merger with another concierge physician by year-end, with no structure mapped out yet

Without intervention, he would keep overpaying self-employment tax and go into the merger with a structure that tied his personal finances to his partner's.

The Gelt Strategic Approach

Gelt focused on a few changes that are right-sized for a solo membership practice. The goal was a structure that pays for itself in the first year and still works after the merger.

Retroactive S-Corp Election

Gelt filed an S-Corp election that reaches back to the start of the year, so the practice captures a full year of benefit instead of waiting until next year. This is the biggest lever, projected at $10K–$13K a year in payroll tax savings.

Solo 401(k) Paired with Owner Salary

Gelt set the physician's salary alongside a Solo 401(k) so that each dollar of compensation also supports a large retirement contribution. This is projected to cut current-year tax by $4K–$7K while building retirement savings through the practice.

Estimated Tax Plan

Gelt built a quarterly payment schedule with a year-end catch-up payment based on a full-year projection. This removes the recurring underpayment penalty and gives the practice predictable cash flow.

Merger Structuring

Gelt recommended a simple partnership in which each physician's own S-Corp is a partner in the combined practice. Each doctor keeps separate finances and can do his own tax planning. The more complex setup that outside investors would require was deferred until it's actually needed.

Bookkeeping Foundation

Gelt referred a medical-practice bookkeeper for quarterly reconciliation. That's required for S-Corp reporting and is the base for every planning decision after it.

Results & Implementation Roadmap

Immediate (0-60 Days)

• File the retroactive S-Corp election
• Send Q3 estimated tax payment instructions
• Engage a bookkeeper and catch up the books

90-120 Days

• Set up owner payroll at a reasonable salary
• Open the Solo 401(k) before year-end
• Review the merger documents before signing
• Run a Q4 projection and make the final catch-up payment

Ongoing Strategy

• Stand up the partnership structure after the merger
• Revisit salary and retirement contributions each year
• Year-round planning plus filing for the practice and household

If implemented as designed, the combined strategy is projected to deliver $15,000 to $20,000 in annual tax savings. That more than covers the cost of proactive planning in the first year, and the savings grow as the merged practice scales.

"I don't run a big specialty practice, so I needed the numbers to make sense on their own. Gelt showed me exactly what the S-Corp would save and set up the merger so my partner and I each keep our own finances."

– Dr. Nathan Cole, Founder, Harborline Concierge Medicine

Conclusion

Membership-based physicians often assume tax strategy only pays off for high-earning specialists. This case shows the opposite. A solo concierge practice with steady revenue can capture meaningful savings from getting the structure right, especially before a merger locks the structure in place.