After-Tax Engineering

Advanced Tool · Estate Planning

Charitable Lead Annuity Trust (CLAT) Optimizer

A Grantor CLAT pays a fixed annuity to charity for a set term, then passes remaining assets to heirs — potentially tax-free. This tool finds the inflection point where a CLAT outperforms keeping assets in a taxable brokerage account.

Advanced estate planning tool. CLATs are complex irrevocable trusts requiring an attorney, CPA, and trustee. This tool is for educational modeling only. Do not implement without qualified legal and tax counsel.
Who this is for: High-net-worth households ($5M+ net worth) with meaningful charitable intent, appreciated assets, and estate tax exposure. If you have not maxed your 401k and HSA, start with the Learning Path first.
Calculating...

Efficiency Audit & Tax Recapture

Federal Cash Refund
$0
Wealth Advantage
$0
Principal Advantage
$0

3-Path Architecture (Dynamic Baseline)

Strategic PathInvestable (Yr 1)Charity GoalWealth (Yr 20)Real Value

Milestone & Commitment trajectory

YearStatus QuoCLAT CorePath 3 (RE)AnnuityTax Drag

CLAT Personal Scenario (Fixed Payout)

MetricValueNotes

Remainder Outcomes by Return

Annual ReturnYear 20 RemainderStatus

Recapture Exposure (Selected Years)

Death YearPaid to CharityPV RemainingRecapture IncomeTax DueCoverage Gap

Backwards Design: $210k AGI Target

Uses a zeroed-out CLAT (120% escalating payout), a 0.5% AGI floor, and the annual AGI deduction cap based on asset type.

Single-Year Attempt

Tax YearBase W-2Cost SegBusiness LossCLAT UsedFinal AGI

Multi-Year Wash (6 Years)

Tax YearBase W-2Cost SegBusiness LossCLAT Deduction UsedFinal AGICLAT Carryforward

Strategic Architect README: Ask, Execution, Logic


The Ask: Determine the Optimization Inflection Point where a Grantor CLAT becomes more efficient than a standard brokerage path, while exposing the annual grantor tax drag and validating resilience under a Year 1 market crash.

The Execution: A single-page, state-driven simulation recomputes 20-year paths whenever any input changes. The model hardcodes OBBBA 2026 rules (0.5% AGI floor and 35% benefit cap) and treats the refund as a 25% down payment that powers the Path 3 real-estate node.

The Logic Layers:

  • Input and Tax Recapture: Convert AGI into a post-tax Status Quo principal and compute the CLAT principal advantage plus OBBBA refund.
  • Simulation Loop: Project Status Quo growth (after annual tax drag) versus CLAT growth (pre-tax, with grantor-paid taxes and fixed annuity payout).
  • Path Comparison: Compare Status Quo, CLAT Core, and CLAT Multiplier with inflation-adjusted real values for year 20.

Strategic Formula Bank

1. Status Quo Principal: sqStart = AGI * (1 - combinedTaxRate)
2. Principal Advantage: principalAdv = Principal - sqStart
3. OBBBA Refund: refund = max(0, min(AGI * deductionLimit, Principal * 0.75) - (AGI * 0.5%)) * 0.35
4. Annual Payout (Annuity): annuity = P * [r / (1 - (1+r)^-n)] where r = 4.6% and n = 20
5. Grantor Tax Drag (annual): taxDrag = max(0, CLAT * appliedGrowth) * combinedTaxRate
6. RE Multiplier Value: reValue = (refund / 0.25) * (1 + reGrowth)^t
7. Wealth Advantage: advantage = (CLAT + RE) - StatusQuo
8. Inflation Deflator: realValue = nominal / (1 + inflationRate)^20

Interactive Decision Tree

Answer one question at a time. The tree routes you to the next step and ends with a recommendation aligned to your inputs.

AGI Flip Analysis (Baseline)

Baseline-only sweep. Charity utility credit adds a % of total charity payout to the GO test. Example: a 50% credit treats $1 of charity as $0.50 of personal benefit in the flip decision. A “GO” requires both Core and Multiplier (plus charity credit) to beat Status Quo, and annual grantor tax drag ≤ 10% of AGI.

24% Threshold (AGI > $211,401)

AGI CLAT Principal Charity Credit Status Quo CLAT Core CLAT Multiplier Core+Charity vs SQ Mult+Charity vs SQ Tax Drag (Yr 1) Tax Drag % AGI GO? SQ Real Core Real Mult Real

32% Threshold (AGI > $403,550)

AGI CLAT Principal Charity Credit Status Quo CLAT Core CLAT Multiplier Core+Charity vs SQ Mult+Charity vs SQ Tax Drag (Yr 1) Tax Drag % AGI GO? SQ Real Core Real Mult Real

How to Read the Flip Summary (Plain English)

  • Core+Charity beats Status Quo: the first AGI where the CLAT Core (plus charity credit) ends higher than the Status Quo path.
  • Multiplier+Charity beats Status Quo: the first AGI where the CLAT Multiplier (plus charity credit) ends higher than the Status Quo path.
  • GO (both + tax drag ≤ 10% AGI): the first AGI where both comparisons are positive and the annual grantor tax drag stays below 10% of AGI.
  • Principal rule: only the AGI above the bracket cutoff is used to fund the CLAT in the sweep.
  • Range and steps: the income values tested (from the start AGI to the end AGI, in $50k jumps).
  • Payout rate: the annual CLAT payout as a % of the swept principal (based on your current inputs).
  • Charity credit: how much personal benefit you assign to each $1 of charity (50% means $0.50 of benefit).

Plain-English Summary (Read Me)


  • This tool compares a CLAT strategy against a standard taxable brokerage (Status Quo).
  • In the AGI sweep, your income is tested from about $403k to $1.5M in $50k steps.
  • The CLAT principal in the sweep is only the income above a chosen tax bracket cutoff.
  • The CLAT Core path shows trust growth after payouts, without the real estate multiplier.
  • The CLAT Multiplier path adds a real estate node funded by the tax refund.
  • The flip decision checks if CLAT Core and CLAT Multiplier both beat Status Quo.
  • Charity utility credit lets you value the charitable giving in the decision math.
  • A 50% credit means every $1 to charity counts as $0.50 of personal benefit.
  • A "GO" only shows if tax drag is 10% of AGI or less.
  • Real values show inflation-adjusted purchasing power for year 20.