Cash Balance Plan Financial Limits

Contributions, Benefits, and What Actually Matters

Cash Balance Plans are governed by a layered set of IRS limits that control how much can go in, how much can be promised, and how benefits are ultimately paid out. Understanding these constraints is critical not just for compliance, but for optimizing tax efficiency and avoiding design failures.

 

1. The Core Limit: Annual Benefit Cap (IRC §415)

At the center of every CBP is the defined benefit limit under Internal Revenue Code Section 415(b).

• 2026 Limit (indexed annually):
  $275,000 per year at retirement (age 62–65 equivalent)
• This is not a contribution limit
• It is the maximum annual lifetime benefit the plan can promise
• Converted to a lump sum, this typically equates to:
  ~$3.0M to $3.5M+ depending on interest rates

Why this matters:

Higher allowable benefits = higher allowable contributions (especially for older physicians)

 

2. Contribution Limits: Actuarially Determined (Not Fixed)

Unlike 401(k) plans, CBPs do not have a fixed annual contribution cap.

Instead, contributions are based on:

• Age of participant
• Compensation
• Target retirement age
• Plan design assumptions (interest crediting rate, mortality tables)

 

Typical Contribution Ranges (Owner-Only Plans)

Age	Approx. Annual Contribution
40	$100K – $180K
50	$180K – $300K
60+	$300K – $450K+

 

These are driven by the need to fund up to the §415 benefit limit within a shorter time horizon.

 

3. Compensation Limits (IRC §401(a)(17))

CBPs can only recognize compensation up to a capped amount under:

• Internal Revenue Code Section 401(a)(17)
• 2026 Limit: ~$350,000 (indexed)

Impact:

• Limits how much salary can be used in benefit calculations
• Primarily affects younger participants or staff allocations

 

4. Minimum & Maximum Funding Rules (IRC §430)

Funding is governed by strict actuarial requirements under Internal Revenue Code Section 430

Key Concepts:

• Minimum Required Contribution (MRC)
• Maximum Deductible Contribution

Important nuance:

• You can’t just “max fund” every year
• Contributions must stay within a funding corridor

Risk Zones:

• Underfunded (<80% AFTAP*) → restrictions + required contributions
• Overfunded (>120–140%) → trapped capital, reversion risk

 

*  Adjusted Funding Target Attainment Percentage

 

5. AFTAP Restrictions (IRC §436)

Funding status directly impacts what you can do in the plan.

 

Key Thresholds:

AFTAP Level	Impact
<80%	Limits lump sums
<60%	Freezes benefit accruals
<50%	Severe restrictions

 

Why this matters:

A poorly designed plan can unintentionally restrict distributions even when the sponsor wants to terminate the plan.

 

6. Interest Crediting Rate (Design Constraint)

Every CBP must define a crediting rate:

• Fixed (e.g., 4%–5%)
• Variable (e.g., Market Return Crediting)

This assumption directly impacts:

• Contribution volatility
• Funding efficiency
• Risk of over/underfunding

Structural reality:

Most funding problems are design-driven, not return-driven.

 

7. Lump Sum Distribution Limits

When terminating or distributing:

• Benefits are converted using IRS segment rates
• Must comply with §415 limits at distribution

Practical implication:

• Rising interest rates → lower lump sums
• Falling rates → higher lump sums (potential overfunding trap)

 

8. Combined Plan Limits (CBP + 401(k))

Most CBPs are paired with a 401(k)/Profit Sharing plan.

Combined Strategy:

• 401(k): ~$70K–$80K total (employee + employer)
• CBP: $100K–$400K+

Result:

Total annual tax-deferred contributions can exceed $200K–$500K+ per year

 

9. PBGC Premium Considerations

Plans may be subject to premiums from the Pension Benefit Guaranty Corporation

Costs include:

• Flat-rate premium per participant
• Variable-rate premium for underfunded plans

Planning impact:

• Larger plans or underfunded plans incur higher costs
• Influences optimal funding strategy

 

10. The Real Constraint: Design Efficiency

The IRS limits are rarely the true bottleneck.

The real limiting factors are:

• Poor crediting rate selection
• Misaligned asset allocation
• Lack of funding corridor management

Result:

• Overfunded plans → trapped capital + excise tax risk
• Underfunded plans → forced contributions + restrictions

 

Bottom Line

Cash Balance Plans offer some of the highest tax-deferred contribution limits available, but they are not “set it and forget it.”

They are:

• Actuarially driven
• Highly sensitive to design assumptions
• Dependent on ongoing funding discipline

 

Call to Action

If you’re contributing heavily or planning to exit your practice in the next 3–7 years the question isn’t just “How much can I put in?”

But instead, “Is my plan structured to avoid becoming a problem later?”

A 30-minute funding risk review can identify:

• Hidden overfunding exposure
• Contribution inefficiencies
• Structural fixes (including Market Return Crediting)