Pension Lump Sum Calculator — Compare Lump Sum vs. Annuity

Lump Sum Offer ($)Enter a valid amount.

Monthly Annuity Payment ($)Enter a valid amount.

Assumed Investment Return (%)

Years to Compare

Better Option Over Selected Period

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Lump Sum Invested (Future Value)

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Total Annuity Payments

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How to Use This Tool

Enter your lump sum offer and monthly annuity payment alternative.
Enter an assumed investment return and time horizon to compare.
Click Compare to see which option nets more over that period.

Lump Sum vs. Annuity: The Trade-off

A pension lump sum gives you a single payment you control and can invest, while a monthly annuity provides guaranteed, predictable income for life (or a set period) but no control over the underlying principal and no inheritance value once you (and any survivor beneficiary) pass away.

Lump Sum Future Value = Lump Sum × (1 + Return Rate)^Years

Total Annuity Payments = Monthly Payment × 12 × Years

Why This Comparison Oversimplifies the Real Decision

Longevity risk: An annuity pays for as long as you (or your spouse) live, which a fixed lump sum comparison over an arbitrary number of years doesn't capture
Market risk: Investing a lump sum carries real risk of underperforming your assumed return, especially with poor returns early on
Inflation: Most pension annuities aren't inflation-adjusted, while a well-invested lump sum has some potential to keep pace with inflation over time
Guaranteed income value: Many retirees place a premium on guaranteed income for budgeting certainty, which isn't purely a financial calculation

This decision has major, irreversible consequences — strongly consider consulting a fee-only financial advisor before choosing.

Frequently Asked Questions

Is taking the lump sum always better if I can invest it well?

Not necessarily — this comparison ignores longevity risk (an annuity pays as long as you live) and market risk (investment returns aren't guaranteed), both of which are major considerations beyond a simple future-value comparison.

Should I consult a financial advisor before choosing?

Yes, strongly consider it — this is a major, typically irreversible financial decision with significant long-term consequences, and a fee-only financial advisor can help you weigh the trade-offs specific to your health, other income sources, and risk tolerance.

This calculator is provided for general informational and estimation purposes only. Results should not be treated as professional financial, tax, legal, medical, or engineering advice. Always verify critical calculations with a qualified professional or official source before making decisions.