When does a defined-benefit plan beat a SEP-IRA for a physician?
Most often when the physician is roughly 45 or older, earns well above the SEP-IRA contribution cap, has stable income, and employs few or no staff. A SEP-IRA caps at 25% of compensation; a defined-benefit or cash balance plan funds an actuarially determined benefit, which can support deductible contributions of $100,000 to $300,000 or more per year depending on age and income. Staff demographics matter because the plan must also fund employee benefits. ProAxis starts practice engagements with a retirement-plan review for exactly this reason.