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Perpetual Pension
Shows the permanent pension that can be drawn from interest alone, without touching the capital.
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What you learn
Anyone who withdraws only the interest secures a permanent pension and passes on the capital undiminished – capital preservation instead of capital drawdown.
→ Story & full explanation: A pension without drawing down capital
Formula
R = K0 · i_per or K0 = R / i_per
How the formula works
The perpetual pension uses only the interest: R = K₀·i. As long as you never withdraw more than the interest produces, the capital stays untouched and the pension flows indefinitely – rearranged, K₀ = R/i gives the capital needed for it.
Perpetual pension: interest withdrawal only, capital stays intact.
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