What a Cash Balance Plan Is and Who It Actually Makes Sense For

What a Cash Balance Plan Is and Who It Actually Makes Sense For

A 50-something dentist clearing $700,000 a year maxes out her 401(k) and thinks she's done. She just left the single largest tax deduction available to a small-business owner on the table.

A cash balance plan can let that same dentist deduct more than $200,000 a year for retirement, on top of the 401(k) she already has. Most CPAs never mention it. Here is the cash balance plan explained the way a smart founder friend would actually tell it to you — what it is, who it fits, and the catch nobody puts in the brochure.

The cash balance plan explained: it's a 401(k)'s much bigger sibling

A cash balance plan is a type of defined benefit plan, the same legal category as the old-school pensions your grandparents had. The IRS treats your contributions as funding a future "benefit," not as an account balance you choose each year — and that distinction is the whole reason the deduction is so large.

A 401(k) is a defined contribution plan. In 2025, you can defer $23,500 of salary (plus a $7,500 catch-up at 50+), and total additions from all sources cap at $70,000 under IRC §415(c).

A cash balance plan plays by a different rulebook. Instead of capping your annual contribution, the law caps your eventual benefit under IRC §415(b) — currently a maximum annuity of $280,000 a year for 2025 ($290,000 for 2026). To fund a benefit that big, the required annual contribution can run far higher than any 401(k) ever allows.

How much you can actually shelter

Here's the part that gets people's attention. Cash balance plan contribution limits aren't a flat number — they scale with your age, because someone who's 58 has fewer years to fund the same retirement benefit than someone who's 38.

The math runs roughly like this:

• A 40-year-old might be able to contribute around $100,000 a year.
• A 50-year-old is often in the $150,000–$200,000 range.
• A 60-year-old can frequently push past $250,000, and as you near retirement the figure can approach $300,000 or more.

Those are illustrative ranges — your real number comes from an actuary, not a calculator. But the pattern holds: the older and higher-earning you are, the more this strategy is built for you. Over a 10-year participation window, the lifetime lump sum a cash balance plan can hold tops out around $3.6 million per person under the IRC §415(b) limits.

Cash balance plan contribution limits stack on your 401(k)

A cash balance plan doesn't replace your 401(k). It sits on top of it.

A typical setup pairs three layers: the 401(k) salary deferral, a profit-sharing contribution, and the cash balance plan. Each is its own deductible bucket, and together they multiply the total you can write off.

Consider an illustrative example. Say a 55-year-old practice owner takes home $600,000 in net income:

• 401(k) deferral plus catch-up: about $31,000
• Profit sharing: roughly $40,000+
• Cash balance plan: around $180,000

That's north of $250,000 in deductible retirement contributions in a single year. At a combined federal-and-state marginal rate near 40%, the tax saved approaches $100,000 — money that compounds inside the plan instead of going to the IRS. (Your numbers depend on your facts; this is a hypothetical, not a promise.)

Who a cash balance plan actually makes sense for

This is where most articles go soft. They won't, so we won't either. A cash balance plan is fantastic for a specific person and a quiet money-pit for the wrong one.

It fits you if you're a high-income owner of a stable, profitable business — a dentist, surgeon, attorney, consultant, or established founder — who is consistently maxing out a 401(k) and still writing large checks to the IRS. It fits especially well if you're over 45 and want to catch up on retirement fast.

It fits poorly if your income swings hard year to year. Here's the catch nobody puts up front: cash balance contributions are largely required, not optional. Once the plan promises a benefit, you're generally obligated to fund it — even in a down year. A defined benefit plan small business owners love in good times can become a cash-flow problem in lean ones.

If you have employees, there's a second wrinkle: nondiscrimination rules mean you'll typically owe meaningful contributions on their behalf too, often 5–7% of pay. For a lean practice with a few staff, the owner's tax savings still dwarf that cost. For a business with a large rank-and-file workforce, the math can flip.

The cost you're actually paying for

A cash balance plan needs an enrolled actuary to run the funding calculation every single year and certify it to the IRS. That's the line item a 401(k) doesn't have — usually a few thousand dollars annually in actuarial and administration fees.

For a high earner deducting $180,000 a year, a $3,000–$5,000 actuary bill against a near-$70,000 tax saving isn't a cost. It's a rounding error. The real risk isn't the fee — it's setting the plan up wrong, over-promising a benefit your income can't sustain, or botching the employee-coverage testing. That's a job for someone who designs these for a living, not a generalist who files your return in April.

Find a CPA who builds these, not one who just files your return

The difference between a cash balance plan that saves you $100,000 a year and one that becomes a funding headache is entirely in the design. You want a tax strategist who runs the projections before you commit, coordinates the actuary, and stress-tests the plan against a bad income year — not someone hearing "cash balance plan" for the first time on your call.

CPA on Fire is a concierge tax strategy and advisory practice built by a former Big Four CPA — the kind of proactive planning shop that runs advanced strategies like cash balance plans as a core part of the work, not an afterthought.

If you're a high earner maxing your 401(k) and still overpaying the IRS, read CPA on Fire's verified reviews on Sam's List and book an intro call. Bring last year's net income and your age. That's all an honest answer to "does a cash balance plan make sense for me?" really requires.