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💵Pension vs. Lump Sum Calculator

Compare taking a guaranteed monthly pension against a one-time lump sum payout. Find the breakeven age, projected lifetime value of each option, and which choice wins for your expected lifespan.

Your Numbers

Your Results

Recommendation
Lump Sum wins
by $2,227,422 over lifetime to age 85
Pension Lifetime Value
$1,386,123
$36,000/year
Lump Sum Future Value
$3,613,545
invested at 6%
Breakeven Age
Never
Lump sum wins at any age given these inputs

What Is Pension vs. Lump Sum?

When a defined-benefit pension plan offers a lump sum buyout option, you face one of the highest-stakes financial decisions in retirement planning. Take the lump sum and you control the money but bear all the investment and longevity risk yourself. Take the pension and you receive a guaranteed monthly income for life, but give up control and are betting on your longevity.

This calculator computes the lifetime value of both options under your stated assumptions and finds the crossover age: the age at which the pension's cumulative payments equal the lump sum's projected value. If you expect to live past that age, the pension typically wins. If you expect to die before it, the lump sum typically wins.

How This Calculator Works

The lump sum is invested at your stated return rate from today until your life expectancy age. The pension pays a fixed monthly amount from your stated start age until your life expectancy, converted to a present value equivalent for comparison. The breakeven age is found by iterating year by year until cumulative pension payments equal the lump sum's accrued value.

Monthly pension amount
The fixed monthly payment the pension promises. This is guaranteed by the plan sponsor (and often PBGC insurance up to a limit) regardless of market returns.
Lump sum offer
The one-time payment offered as an alternative to the pension. Plans often offer this during a specific window. The offer's fairness depends on the discount rate the plan uses to calculate it.
Pension start age
When pension payments begin. Many pensions allow early retirement with reduced benefits, or offer full benefits at a specific age (often 55 or 62).
Investment return on lump sum
What you could earn by investing the lump sum. This is the critical variable, because the pension is essentially a bond-like guaranteed payout, so comparing it to a risky investment return overstates the lump sum's advantage.

Personal Considerations

The most common cognitive error in this decision is comparing the pension to an optimistic investment return. A guaranteed 5% monthly pension is not equivalent to an uncertain 7% market return; the certainty has real value. A useful reframe is to ask: at what interest rate would I have to invest the lump sum to match the pension's lifetime payments? If that rate is below what high-quality bonds currently yield, the pension is probably the better deal.

Pension decisions also carry enormous gender and longevity asymmetry. Women statistically live longer than men, which makes the pension more valuable for them on average. Spouses should evaluate both their own and joint survival scenarios, and check whether the pension includes a survivor benefit option.

If what you're feeling goes beyond what a calculator can help with, licensed clinicians are available at SanaNetwork.com, a referral network founded by this site's founder, Dr. Yoendry Torres.

Frequently Asked Questions

Is the lump sum or pension better?

It depends entirely on your longevity, your investment discipline, your alternative income sources, and the discount rate your plan used to calculate the lump sum. There is no universal right answer. This calculator shows which choice wins given your specific assumptions; the key is to stress-test the result with different life expectancy and return assumptions.

What is a survivor benefit and should I choose it?

A survivor benefit pays a reduced pension to your spouse after you die. Choosing it lowers your monthly payment by 10-30% but protects your spouse's income. If your spouse has strong independent income or a short life expectancy, you may decline it. Otherwise, the survivor benefit is often worth the cost.

What is PBGC insurance?

The Pension Benefit Guaranty Corporation (PBGC) insures private-sector pension benefits up to certain limits (roughly $7,400/month in 2024 for a retiree at 65). If your pension is a government pension, it is typically not insured by PBGC but may have its own statutory protection.

Can I take part lump sum and part pension?

Sometimes, depending on the plan. Some plans offer partial lump sum elections. Ask your plan administrator specifically about partial elections before deciding.