Social Security Claiming Optimizer

Most Social Security calculators use pre-taxbreak-even analysis — comparing gross benefits at different claiming ages. This misses a critical interaction: the Social Security tax torpedo.

Up to 85% of your Social Security benefits can be taxable, and the phase-in creates an effective marginal rate that can exceed 40% in the “torpedo zone” (roughly $32,000–$44,000 combined income for married couples). This means the optimal claiming age before taxes can differ from the optimal age after taxes.

This optimizer runs the full tax engine for each of the 81 claiming-age combinations (9×9 for couples), computing the marginal tax cost of Social Security income in each year using a delta technique: tax with SS minus tax without SS. This captures bracket interactions, the torpedo, and state-specific SS exclusions.

How Mortality Weighting Works

Rather than assuming a fixed death age, the optimizer weights each year’s benefit by the probability of being alive to receive it, using the SSA 2022 period life tables. For couples, it uses last-survivor probabilities (the chance that at least one spouse is alive). This avoids the bias inherent in choosing a single life expectancy.

Spousal & Survivor Benefits

For married couples, the optimizer automatically computes spousal top-up benefits(up to 50% of the higher earner’s PIA) and survivor benefits(up to 100% of the deceased spouse’s benefit, subject to RIB-LIM). These are factored into every strategy.

A common result: the higher earner delays to 69 or 70 to maximize the survivor benefit, while the lower earner claims earlier. The optimizer will find this if it’s optimal for your situation.

Key Inputs Explained

• PIA (Primary Insurance Amount): Your monthly benefit at full retirement age. Find this on your Social Security statement at ssa.gov/myaccount.
• Other retirement income: Pension, IRA/401(k) withdrawals, and investment income in retirement. This determines which tax brackets your SS benefits fall into and whether the torpedo zone applies.
• Discount rate: The real (inflation-adjusted) rate at which you discount future dollars. A higher rate favors earlier claiming. Default is 1%.
• Benefit cuts:The SSA trust fund is projected to be depleted around 2033, which would trigger an automatic ∼23% benefit reduction under current law. Toggle this to see how it changes the optimal strategy.

Early Claiming Reductions & Delayed Credits

Claiming before your FRA (67 for those born after 1960) permanently reduces benefits: 5/9% per month for the first 36 months early, 5/12% per month beyond that. At 62, you receive about 70% of your FRA benefit.

Delayed retirement credits add 2/3% per month (8% per year) from FRA to age 70. At 70, you receive 124% of your FRA benefit. There is no benefit to delaying past 70.