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Payroll Tax Investment Simulator

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DC PLAN VS. SOCIAL SECURITY (COMBINED HOUSEHOLD)

1.53xcompared to baseline social security benefits

DC Plan Beats Social Security

Based on your inputs, the DC alternative produces 1.53x more in present value over your lifetime — a difference of approximately $609.1K.

$10$100$1K$10K$100K$1M$10M$100M$1BPortfolio Value
19611972198219932004201520252036RetirementSurvivor ↓
$20K$40K$60KAnnual Income
SS BenefitsDC Plan

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Peak Balance at Retirement

$1.09M

nominal

First-Year Withdrawal

$43.8K

Bonds (US Aggregate) — nominal

Monthly Portfolio Income

$3.6K

Bonds (US Aggregate) — nominal

Monthly SS Benefit

$2.4K

nominal

Legacy Portfolio Value

$740.7K

Bonds (US Aggregate) — age 95/2036

Legacy SS Value

$0

DC inheritable; SS survivor benefits apply

Investment Strategy

Age 22–37

Equities – Aggressive

15.5% avg

Age 37–52

Equities – Moderate

10.6% avg

Age 52–67

Equities – Conservative

9.2% avg

Retirement phase

Bonds (US Aggregate)

3.9% avg

Primary Taxpayer

1941 (age 85)

⚠ This worker is already past retirement age. Adjust birth year or retirement age.

Some College profile implies ~$27.9K career average from $54.7K current income.

$54.7K
67
95 yrs
4%

Spouse

1939 (age 87)

⚠ This worker is already past retirement age. Adjust birth year or retirement age.

Some College profile implies ~$15.4K career average from $36K current income.

Census median (default ~$36K)
67
90 yrs
4%

How this simulator works

This tool takes the payroll taxes you would pay into Social Security over your career and compares them against investing those same dollars in a defined-contribution account. The Social Security side follows the SSA's published formulas — wage-indexed top-35 earnings, PIA bend points, and the Full Retirement Age schedule. The investment side compounds those same payroll contributions under a portfolio strategy you choose, then withdraws them in retirement under a rule you select.

The headline number is a present-value ratio: the defined-contribution portfolio value divided by the lifetime value of the Social Security benefit, both discounted to today's dollars. A ratio above 1.0 means the investment account delivered more; below 1.0 means Social Security delivered more. The Comparisons tab shows the full breakdown, and the Monte Carlo tab runs 1,000 return sequences to show the range of outcomes.

Every assumption is editable — return rates, inflation, wage growth, withdrawal rules, life expectancy, and payroll-tax treatment are all on the Assumptions tab, and nothing is hidden in the engine. For the full methodology, see How the Model Works.