Guide

The cash-balance plan: six-figure deductions at high income

Summary

A cash-balance plan is a defined-benefit plan, and it tends to make sense once a solo practice throws off high, stable profit that already maxes a SEP or solo 401(k) and the owner wants to shelter more. Because the contribution is actuarially funded rather than capped at a flat percentage, the deductible amount can run well above defined-contribution ceilings — in exchange for an actuary, annual funding you must sustain, and covering eligible staff.

By Gale Editorial · Updated 2026-07-27. Every figure cited to a dated source. How we write.

What a cash-balance plan actually is

A cash-balance plan is a type of defined-benefit (pension) plan: instead of capping what you put in, it defines a retirement benefit the plan funds toward, and an actuary calculates the contribution needed to reach it each year. That structure is what lets the deductible contribution run far above a SEP or solo 401(k) — and why the plan requires an actuary and a third-party administrator to operate.

The practical takeaway: a defined-benefit plan is a bigger tool with bigger overhead. It rewards a specific situation — high, steady income with room to shelter more — and punishes an uneven one, because the funding is a commitment rather than a choice you make year to year.

Max the defined-contribution tiers first

Before a defined-benefit plan is worth the overhead, most solo practices fill the simpler tiers first. A SEP-IRA lets you contribute up to 25% of compensation within the annual limits, with almost no paperwork 1. A one-participant 401(k) covers an owner with no employees — a spouse excepted — and combines employee deferrals with an employer contribution under the annual limits 2. Working out solo 401(k) vs SEP usually comes before any defined-benefit conversation.

  • SEP-IRA: simplest to run; employer contributions only; must cover eligible staff equally once you hire 1.
  • One-participant 401(k): deferrals plus an employer contribution; owner-and-spouse only 2.

Why the defined-benefit tier can deduct more

The defined-contribution tiers cap the employer piece at a percentage of pay — a SEP stops at 25% of compensation 1. A defined-benefit plan works the other way: it funds toward a target benefit, so an actuary sets the annual contribution from your age, income, and the benefit goal. For an older, higher-earning owner with a shorter runway to retirement, that formula can support a much larger deductible contribution than any percentage-of-pay cap allows.

The number is individualized, not a published limit — which is exactly why an actuary has to compute it and why two owners with identical revenue can land on very different contributions.

How it changes your QBI math

A large deductible contribution lowers your taxable income, which can matter beyond the deduction itself. Clinicians are a specified service trade or business (SSTB) whose qualified business income deduction phases out over a taxable-income range the IRS sets each year 3. A contribution that pulls your taxable income back under that range can restore part or all of a QBI deduction you would otherwise lose — a second-order benefit worth modeling before you fund, because the thresholds move annually.

The compensation base and your entity

How much you can fund depends on your compensation, and how you are taxed defines what compensation means. If you operate as an S corporation, your contribution base is your W-2 reasonable compensation, because a shareholder-employee must take that wage before distributions 4. If you are a sole proprietor or single-member LLC, the base is your net self-employment earnings instead. Settling the entity and the salary is a prerequisite your CPA and plan actuary handle together, because a low salary can quietly shrink what the plan can fund.

The costs and the commitment

A cash-balance plan is neither free nor casual. It needs an actuary and a third-party administrator, carries its own annual filing, and — most consequential — commits you to funding the benefit every year, lean years included. If you already employ staff, whose payroll taxes you withhold and deposit 5, the plan generally must include eligible employees as well 1, which adds real cost. Owners tend to run these on a cash basis, almost always, alongside clean monthly books.

  • Ongoing cost: actuary and TPA fees, annual valuation and filing.
  • Funding obligation: the contribution is required, not discretionary.
  • Staff coverage: eligible employees generally must be included 1.

When a defined-benefit plan makes sense

A defined-benefit or cash-balance plan tends to earn its keep when profit is high, stable, and predictable; when you have already maxed a SEP or solo 401(k); when you want to shelter well beyond those limits; and when your horizon to retirement is long enough to justify the setup and the multi-year funding lock. It fits uneven income poorly. Run the projection and the all-in cost with your CPA and an actuary before committing.

A quick decision checklist to bring to that conversation:

  • Is profit consistently high, not just high in one strong year?
  • Are the defined-contribution tiers already maxed?
  • Can you fund the required contribution in a down year?
  • Is your retirement horizon long enough to justify the setup?

Common questions

These plans are commonly paired — a 401(k) with an employer profit-sharing piece stacked under a cash-balance plan — which is much of the appeal at high income. The combined design and the contribution split are what an actuary and third-party administrator set up and test each year, so this is a build-it-with-professionals decision rather than a DIY one.

There is no flat percentage. A cash-balance contribution is actuarially determined from your age, compensation, and the plan's benefit target, so two owners with the same income can see very different numbers. That is precisely why the plan needs an actuary. Ask for a contribution projection before you decide whether the deduction justifies the ongoing cost.

A defined-benefit plan commits you to funding the promised benefit annually, which is the main risk when revenue is uneven. Plans can be designed with some built-in flexibility and can be frozen or amended, but not casually. Because of that funding obligation, these plans fit practices with stable, predictable profit far better than variable ones.

Generally yes. A qualified plan must include eligible employees, the same way a SEP must once you have staff, so the cost of covering others is part of the math. A solo owner with no employees — a spouse aside — avoids that, which is part of why these plans are most attractive before you hire.

For most solo practices, yes. A SEP or one-participant 401(k) shelters a substantial amount with far less cost and commitment. A cash-balance plan earns its overhead only when you are already maxing those tiers and want to defer meaningfully more, with income stable enough to fund the contribution every year.

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References

  1. 1.Internal Revenue Service (2026). Simplified Employee Pension plan (SEP). Internal Revenue Service. link ✓That a SEP-IRA allows employer contributions up to 25% of compensation within annual limits and must cover eligible employees once the practice has staff.
  2. 2.Internal Revenue Service (2026). One-participant 401(k) plans. Internal Revenue Service. link ✓That a one-participant 401(k) covers an owner with no employees (spouse excepted), combining deferrals and employer contributions under the annual limits.
  3. 3.Internal Revenue Service (2026). Qualified Business Income Deduction. Internal Revenue Service. link ✓That clinicians are an SSTB whose section 199A QBI deduction phases out over a taxable-income range, so a deduction that lowers taxable income can affect it.
  4. 4.Internal Revenue Service (2026). S corporations. Internal Revenue Service. link ✓That an S-corp shareholder-employee must take reasonable compensation as W-2 wages before distributions, which is the compensation figure a plan contribution is measured against.
  5. 5.Internal Revenue Service (2026). Understanding employment taxes. Internal Revenue Service. link ✓That an employer withholds and deposits employees' income, Social Security, and Medicare taxes — the payroll obligations already in place once a practice has staff.

https://www.gale.care/for-providers/tax-cash-balance-plans · 5 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.

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