The pension vs lump sum calculator helps you decide whether to take guaranteed monthly pension payments or a one-time lump sum offer. Enter both options to see the break-even age and total lifetime value of each choice.
Option A: Monthly Pension
0% if no cost-of-living adjustment
Survivor benefits typically reduce pension by 5-15%
Option B: Lump Sum
Conservative: 3-4%; Moderate: 5-6%; Aggressive: 7-8%
Annual draw from lump sum as % of balance
Pension vs Lump Sum: How to Decide
Choosing between a monthly pension and a lump sum is one of the most significant financial decisions retirees face — and it's usually irrevocable. The right choice depends on several key factors.
The Break-Even Calculation
The pension wins in the long run because it pays as long as you live. The lump sum wins if you invest it wisely and don't live long enough for the pension payments to surpass the lump sum's value. Break-even typically falls between age 78-85. If your family history suggests you'll live well past 85, the pension often wins.
The Implied Discount Rate
Calculate the interest rate your lump sum would need to earn to replicate the pension's lifetime payments. This "implied rate" reveals how generous the pension offer actually is. If the implied rate is 3% and you're confident you can earn 6% investing, the lump sum may be better. If the implied rate is 6% and you're a conservative investor, the pension offers guaranteed value that's hard to beat.
Factors Favoring the Pension
Choose the monthly pension if you're a conservative investor, you have longevity in your family, you don't have a surviving spouse to leave money to, or you value the simplicity of guaranteed income. Social Security and pensions together can cover most basic expenses, removing investment risk from retirement.
Factors Favoring the Lump Sum
Consider the lump sum if you have health issues that suggest a shorter life expectancy, you're a disciplined investor who can earn 6%+ consistently, you want to leave assets to heirs, or your employer's financial stability is questionable. Roll the lump sum directly to an IRA to avoid immediate taxation.
FAQ
What is a pension lump sum offer?
A pension lump sum (also called a pension buyout) is when your employer offers to pay you a single one-time amount instead of monthly pension payments for life. Many companies offer this to reduce their long-term pension liabilities.
How do I decide between pension and lump sum?
The break-even calculation is key: if your lump sum invested wisely generates the same cumulative lifetime income as the pension, you reach break-even at a certain age. Living beyond that age, the pension wins; below it, the lump sum wins. Your health, investment skill, and need for guaranteed income all matter.
What discount rate should I use?
The discount rate represents what you could earn by investing the lump sum. Conservative investors use 3-4%; moderate investors use 5-6%; aggressive investors use 7-8%. The pension's implicit rate can be calculated as: the return needed to make the lump sum equal the pension's present value.
Does the pension include cost-of-living adjustments?
Many pensions do not include COLA (cost-of-living adjustments), meaning inflation erodes the purchasing power of your monthly check over time. If your pension has no COLA, a lump sum invested to grow with inflation can be more valuable in later decades.
What about pension insurance (PBGC)?
In the US, private sector pensions are insured by the PBGC up to about $7,200/month in 2025. Government pensions typically have stronger guarantees. If your company's financial health is uncertain, this affects the pension's security relative to taking the lump sum now.
Is this tool accurate?
This calculator provides estimates for comparison purposes. Actual results depend on your investment returns, taxes, inflation, and life expectancy. Consult a fee-only financial planner before making an irrevocable pension decision.