Problem
Dual-income couples aged 55-60 each hold National Pension, Retirement Pension, and private pensions, but have no way to simulate which spouse should start withdrawing first, at what age, and from which pension to maximize total after-tax income. They must check the National Pension Service, retirement pension managers, and the National Tax Service separately, and factoring in combined income tax and health insurance premiums requires paying a tax accountant ₩500,000-1,000,000 (~$375-$750). Poor withdrawal sequencing can result in ₩2-4 million (~$1,500-$3,000) in annual tax differences.
Solution
Each spouse enters their pension types, expected payouts, and planned start ages on a web interface, and the system automatically generates a 10-20 year cash flow table reflecting combined income tax, health insurance premiums, and Basic Pension eligibility impacts. Adjusting withdrawal timing via sliders updates after-tax totals in real time. Includes automatic optimal combination recommendations.