Based on these inputs, the calculator will determine:

Years until retirement: 65 - 30 = 35 years
Future value of current savings: $50,000 * (1 + 0.07)^35 ≈ $533,750
Future value of contributions: $5,000 * [((1 + 0.07)^35 - 1) / 0.07] ≈ $933,750
Total estimated nest egg: $533,750 + $933,750 = $1,467,500
Desired income adjusted for inflation: $60,000 * (1 + 0.03)^35 ≈ $168,000
Sustainable annual withdrawal (4% rule): $1,467,500 * 0.04 = $58,700
Income gap/surplus: $58,700 - $168,000 = -$109,300 (a significant shortfall)
Calculated withdrawal rate: ($168,000 / $1,467,500) * 100 ≈ 11.45%

This example highlights a potential shortfall, indicating the need to adjust contributions, desired income, or retirement age.

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