My private practice group offers a cash balance plan on top of the 401k. How should I think about it?

What is it, mechanically?

A cash balance plan is a type of defined benefit pension plan, but it looks and feels like a 401(k). Each participant has a hypothetical account balance. Each year, the account is credited with a contribution credit (a percentage of pay or a flat dollar amount) plus an interest credit (a stated rate, often tied to Treasury yields).

At retirement or departure, you take the balance as a lump sum (usually rolled to an IRA) or as an annuity. For the high earner, the key number is the annual contribution: it can be $100,000 to $200,000 plus per year, depending on age and plan design, on top of the 401(k). These ranges are illustrative. Your plan's actuary sets the actual number.

The tax treatment is the point. Contributions are pretax, growth is tax deferred, and at peak earning years the deduction lands in your highest bracket years. For an anesthesiologist in the top brackets, sheltering an extra six figures a year is the largest single tax move available.

What is the commitment?

Consistent funding, usually for at least three to five years. Cash balance plans are not flexible the way 401(k)s are. The plan has a funding obligation each year, and the group has to meet it. If the group's income drops, the obligation does not.

This is why the plan works best for stable, high earning groups with predictable revenue. It works worst for groups with volatile income or partners who might leave soon. Before you bless the plan, ask about the group's funding history and what happens if revenue falls short.

The contribution formula often favors older, higher paid partners, because defined benefit math allows larger contributions for participants closer to retirement age. Younger physicians should check what their allocation actually looks like. If you are 38 and the 58 year old partners are getting $180,000 allocations while you get $40,000, that is the design working as intended, but you should know it going in. These figures are illustrative.

What happens when you leave?

Your balance typically rolls to an IRA when you leave the group. But check the vesting schedule and the plan fees. Some plans have vesting periods. Leave before you are vested and you forfeit part of the balance. Plan administration fees and actuarial costs are real, and they come out of the group's pocket, which means out of the partners' distributions.

Also check the interest crediting rate. The plan credits your hypothetical balance at a stated rate each year. If that rate is low, the plan is mostly a tax shelter, not a growth vehicle. That is fine, as long as you know which one you bought.

How does it fit with the 401(k)?

It pairs with the 401(k). It does not replace it. The order: max the 401(k) first ($24,500 in employee deferrals for 2026, plus match and profit sharing), then fund the cash balance plan with dollars that would otherwise land in a taxable account.

The comparison that matters is taxable vs cash balance. Every dollar in the cash balance plan is a dollar not taxed this year at your top marginal rate. For a peak earner, that arbitrage is enormous. The dollars were going to be saved anyway (at the 25 to 30 percent savings rate). The plan just changes where they land and how they are taxed.

One caution: the plan's required funding can constrain the group. Partners who want flexibility, who might cut back to 0.8 FTE, or who might leave, should understand that the plan assumes continued high earnings and continued participation. A partner stepping back may find the plan's funding expectations do not step back with them.

What do you ask before joining the plan?

What is my annual allocation at my age and pay? What is the vesting schedule? What are the plan's fees and who pays them? What is the interest crediting rate? What happens to my balance if I leave, cut back, or the group dissolves? And what is the group's funding history?

Get the answers from the plan's actuary or administrator, not just from the senior partner who loves the plan. The senior partner's allocation is not your allocation.

What is the decision rule?