Decision Summary
Recommendation: Lump sum favored
-$14,411.34
Pension NPV is $485,588.66 vs lump sum of $500,000. Lump sum favored.
Retirement
Pension vs Lump Sum Calculator
Compare a pension annuity against a lump sum payout using present value analysis, life expectancy, discount rates, and the tax impact of each payout path.
Scenario Comparison
The main answer and the most important supporting outputs in one glance.
Recommendation: Lump sum favored
-$14,411.34
Pension NPV
$485,588.66
Pension total (nominal)
$828,000.00
Lump sum invested value at LE
$1,535,761.88
Key Metrics
Pension NPV
$485,588.66
Pension total (nominal)
$828,000.00
Lump sum invested value at LE
$1,535,761.88
Breakeven age
0
How to use it
- Enter the monthly pension amount, lump-sum offer, your age, expected lifespan, discount rate, tax rate on pension income, and the return you expect if you invest the lump sum. Include any COLA on the pension and survivor benefits.
- Read the present value of the pension annuity versus the lump sum and the break-even age where the pension cumulative payments exceed the lump sum's invested value. If the break-even age is well before your life expectancy, the pension is the stronger bet.
- Pensions with COLA adjustments and survivor benefits are worth significantly more than their headline monthly payment suggests. A lump sum looks large but must last decades, and most people underestimate longevity risk and overestimate investment returns.
- If you have other guaranteed income like Social Security that covers essentials, the lump sum gives flexibility. If the pension is your primary income floor, taking the annuity provides longevity insurance no investment can replicate. Use the retirement calculator to see the full picture.
- Re-run when lump-sum offers are updated, interest rates change, or health status shifts your life expectancy assumption. Track the implicit discount rate the employer is offering and compare it to risk-free rates.
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Always available for agents
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Tool contract JSON
https://aifinhub.io/contracts/pension-vs-lump-sum-calculator.jsonStable input and output contract for this exact tool.
Human review
People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.
- /agent-tools.json - machine-readable tool index.
- /llms.txt - human-readable model discovery guide.
- /.well-known/webmcp.json - WebMCP capabilities manifest.
- /.well-known/ai-plugin.json - plugin-style discovery manifest.
{
"tool": "pension_vs_lump_sum",
"monthly_pension": 3200,
"lump_sum_offer": 580000,
"current_age": 58,
"life_expectancy": 85,
"discount_rate_percent": 5,
"tax_rate_percent": 22
} Expand developer notes
Agent playbook
- Resolve Pension vs Lump Sum Calculator from /agent-tools.json and open its contract before execution.
- Validate inputs against the contract schema instead of scraping labels from the page UI.
- Open the browser page only when a person wants to review charts, assumptions, or related tools.
Agent FAQ
Should ChatGPT, Claude, or another agent click through the UI?
No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.
When do tools show Quick and Advanced?
Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.
When should an agent still open the browser page?
Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.
Questions people usually ask
What does this calculator compare?
It models the lifetime value of taking a monthly pension payment versus accepting a one-time lump sum and investing it yourself. The right choice depends on your life expectancy, investment confidence, and need for guaranteed income.
How is the break-even age calculated?
Break-even is the age at which cumulative pension payments exceed what you would have accumulated by investing the lump sum. If you live beyond the break-even age, the pension wins. If you die before, the lump sum (and its remaining balance for heirs) would have been better.
Is the pension always the safer choice?
Not always. Pensions depend on the plan sponsor's financial health — underfunded corporate pensions carry default risk. PBGC insurance covers some but not all pension benefits. The lump sum eliminates this counterparty risk but transfers investment risk to you.
When should I use this vs talking to a financial advisor?
Use this for initial scenario modeling before an advisor meeting. The pension-vs-lump-sum decision is one of the largest irreversible financial choices many people make, and professional guidance is strongly recommended before finalizing.
Is my data stored?
No. All calculations happen in your browser. Nothing is stored or transmitted.
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