Estimate required life cover using the income-replacement approach.
按收入替代与负债估算家庭所需寿险保额。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Income replacement method | Required cover ≈ annual income × replacement years × replacement ratio + debts − liquid assets | Huebner 1927, The Economics of Life Insurance |
| Human life value | Economic value is the present value of future earned income, with replacement ratios commonly 60 to 80 percent | Huebner 1927, The Economics of Life Insurance |
| Gap basis | The gap equals need minus existing cover; a negative gap means current cover already suffices | ISO 22222:2005 Personal financial planning, par. 6 |