There’s a point in a practice’s life where the tax bill stops being annoying and starts being the single biggest line item you have. You’re producing well, the overhead’s under control, and the reward for all of it is a number in April that makes you a little ill.
At that point most dentists have already done the obvious things. S-corp election, reasonable salary, maxed 401(k), some equipment written off. Those still work. They just stop being enough, because a 401(k) has a ceiling and your income has cleared it.
Having cash balance plans for dentists usually comes next. It is also the strategy most often explained badly, so let’s do it properly.
A Cash Balance Plan Is a Pension, Not a Bigger 401(k)
This is the part that gets muddled, and it changes everything downstream.
A cash balance plan is a defined benefit plan, which is to say a pension. The IRS describes it as a plan where the benefit is computed by formula using contribution and earning credits, with each participant holding a hypothetical account. That hypothetical account is why it feels like a 401(k) when you look at your statement.
But the legal substance is a pension. Because it is a defined benefit plan, it carries all the defined benefit requirements, including funding requirements. You are not choosing to contribute each year the way you choose to defer salary into a 401(k). You are promising a benefit, and then funding that promise.
That distinction is where the real advantage and the real commitment both come from. Which brings us to the reason anyone takes on a pension obligation in the first place.
Why Does the 401(k) Stop Being Enough?
Because the deferral limit is a flat dollar figure and your income isn’t.
For 2026, the amount you can defer into a 401(k) is $24,500, indexed annually. Add the employer side, and you get meaningfully higher, but there’s still a hard ceiling, and it doesn’t move because you had a good year.
For a dentist producing at a high level, that ceiling arrives early. You shelter what you can, and the rest lands on your return at your top marginal rate. Once that’s happening every year, the question isn’t whether to do something else. It’s which something else fits.
A cash balance plan answers that by working on a completely different limit.
The Contribution Is Actuarial, Which Is Why Your Age Matters
Here’s the mechanism. A defined benefit plan is capped on the benefit it can promise, not directly on what you put in. For 2026 the annual benefit is limited to the lesser of 100% of your average compensation for your highest three consecutive years, or $290,000.
Read that carefully, because it’s misquoted constantly. That figure is a ceiling on the annual retirement benefit the plan can pay you, not a cap on this year’s contribution.
What you contribute is whatever an actuary calculates is needed to fund the promised benefit by retirement. And that is why age drives the number. A dentist at 55 has fewer years to fund the same benefit than a dentist at 40, so the annual contribution the actuary can justify is substantially larger. This is one of the few strategies in the tax code that gets better the longer you’ve waited, which is a pleasant change.
Deductions of that size do something else useful for a dentist specifically. The next question is what a large deduction unlocks, and that comes down to a quirk in how your profession is classified.
Dentistry Is an SSTB, and That Changes the Whole Calculation
The qualified business income deduction under Section 199A lets many pass-through owners deduct a portion of business income. There’s a catch that lands squarely on you.
Congressional Research Service guidance describes a specified service trade or business, an SSTB, as “a personal service business such as accounting, law, and medicine.” Dentistry sits inside that. And for an SSTB, the rule above the income threshold is unusually blunt: an SSTB owner with taxable income above the upper threshold “may claim no deduction” for that business’s QBI.
Not a reduced deduction. None.
The thresholds are indexed each year, and the One Big Beautiful Bill Act made 199A permanent while modifying how the phase-in works, so the specific figures move. The structural point doesn’t: for a dentist, taxable income sitting above the range means the QBI deduction is simply gone.
Which sets up the move that makes the whole thing worth doing.
What Does “Stacking” Actually Look Like?
Stacking means combining strategies so they compound rather than sit side by side.
A large cash balance contribution reduces taxable income. If that reduction brings you from above the 199A threshold to inside or below it, you don’t just get the deduction for the contribution. You also restore access to a deduction you’d otherwise have lost entirely because of your profession.
That’s the second-order effect, and it’s the reason the sequencing matters. Layered together, the pieces usually look like a reasonable S-corp salary, a maxed 401(k) with the employer match, depreciation on equipment or a build-out, and the cash balance plan sitting on top. Each is ordinary on its own. The combination is what moves you across a threshold.
That decision about sequencing determines what the plan is worth to you. It also determines what you’re signing up for, and the commitment is the part worth being honest about.
The Commitment Is Real, and It Isn’t One Year
A cash balance plan is not a switch you flip in a strong year and forget in a weak one.
Because it’s a defined benefit plan, it comes with funding requirements. The expectation is that you fund it consistently for several years. Design gives you some flexibility in the range, and plans can be amended or frozen when circumstances genuinely change, but going in assuming you can skip a year because collections dipped is the wrong mental model.
Every practice has a runway, and the amount of runway you have is the amount of confidence you have. When the cash balance in the account dips, people make worse decisions, cutting things they shouldn’t because they’re solving for this month. A pension obligation on top of a thin cash position creates exactly that pressure.
There’s also staff. A cash balance plan generally has to cover eligible employees, not just the owner, so the cost of covering your team is part of the arithmetic from day one rather than a surprise in year two.
Is a Cash Balance Plan Right for Every Practice?
No, and the honest filter is narrower than most articles suggest.
It tends to fit when income is high and reasonably stable, when you’re closer to retirement than to the start of your career, when the practice throws off enough cash that a required annual contribution isn’t frightening, and when your team is small enough that the employee cost stays sensible.
It tends not to fit when profit swings hard year to year, when you’re early in ownership and still paying down acquisition debt, or when the cash simply isn’t there yet. And it’s worth saying plainly that it isn’t the only route. Some dentists would rather put money into property. Others don’t want to be picking up the phone at midnight when a toilet is overflowing, and for them plans and equities are the better fit.
Your tax plan should follow your goals, not the other way around. A strategy you resent is one you’ll abandon.
What to Do Between Now and Year-End
The timing is less forgiving than most tax strategies, so the practical sequence matters.
Start with a real projection of this year’s profit rather than last year’s. Then get a view of what a plan design would actually require of you annually, including the employee cost, and test that against your cash position and your debt schedule. If the numbers hold, plan documents generally need to be in place before your year-end, which makes autumn the working window rather than December.
Bring your CPA and a plan actuary into the same conversation. This is one of the areas where dental tax strategy and plan design have to be decided together, because the design assumptions drive the deduction, and the deduction is the reason you’re doing it.
If you’re producing well and the tax bill has become the thing you think about in the car, it’s worth an actual conversation about whether this fits.
Reach out and book a call with the Virjee Consulting team to walk through your numbers, your timeline, and what you’re genuinely comfortable committing to.
We’ll tell you if it isn’t the right move for your practice. That answer is worth having too.
About the Author
Omar Virjee, CPA is the founder of Virjee Consulting, a CPA firm specializing in year-round tax planning and monthly bookkeeping for solo and small-group dental practice owners across the United States. Omar focuses on helping dentists maximize owner take-home pay through proactive tax strategy, S-Corp optimization, dental real estate planning, and clear monthly financials.
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