Three Moves Left on the Table: HSA, Augusta Rule, and the STR Loophole

Posted Wednesday, July 8, 2026

The Situation

Mike B. from Massachusetts runs a growing S Corp consulting business with gross profit tracking toward $500,000 for 2026, a Solo 401(k) maxed on both employee and employer sides, and a long-term rental property already on the books. He came into this pre-planning session with Andy Pearson, EA, Tax Supervisor at WCG CPAs & Advisors, to confirm he was on track and to ask whether anything was missing.

A few things were.

The Strategy

Andy walked through three planning moves Mike wasn’t fully utilizing.

HSA contributions routed through the S Corp. If Mike’s family health insurance plan is high-deductible and HSA-eligible, he can contribute up to $8,750 for 2026 and run it through the S Corp as part of officer compensation. That adds to his reasonable officer compensation number without triggering FICA taxes on those dollars. A special payroll run is needed before year-end to capture it correctly.

The Augusta Rule. Under IRC Section 280A, a business owner can rent their personal home to their own company for up to 14 days per year, take a business deduction for the rent paid, and pay zero income tax on that rental income personally. Mike’s wife is involved in the business, which makes this even more straightforward. The key requirements: a legitimate business purpose, documented meeting minutes, and a fair market value rental rate comparable to other local conference room rentals.

The STR loophole paired with cost segregation. Andy walked Mike through the short-term rental tax loophole since Mike is considering an additional property purchase. The mechanics: average rental stays of seven days or less, combined with material participation (100+ hours between spouses, more than anyone else). Meeting those two requirements converts the rental from a passive activity to an active one, meaning losses can offset W-2 and S Corp income. On a $1.2M property with $1M in building basis, a cost segregation study typically accelerates 18 to 20 percent of that basis into the first year, creating roughly $200K in depreciation and potentially $50,000 in tax savings at the 24 percent bracket.

The Outcome

Mike’s 401(k) and salary structure were already in solid shape. Adding the HSA and Augusta Rule are near-term moves that can be executed before year-end with minimal friction. The STR loophole is a longer-term play tied to his next property decision, but the planning groundwork is in place.

Total Taxes Saved

$5,600

Beyond S Corp Savings

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The tax advisors, business consultants and rental property experts at WCG CPAs & Advisors are not salespeople; we are not putting lipstick on a pig expecting you to love it. Our job remains being professionally detached, giving you information and letting you decide within our ethical guidelines and your risk profiles.

We see far too many crazy schemes and half-baked ideas from attorneys and wealth managers. In some cases, they are good ideas. In most cases, all the entities, layering and mixed ownership is only the illusion of precision. As Chris Rock says, just because you can drive your car with your feet doesn’t make it a good idea. In other words, let’s not automatically convert “you can” into “you must.”

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