Derive the net single premium from the annual benefit and the annuity-due factor.
输入年给付额与年金现值因子 a_x,求净单保费。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Net single premium | Net single premium = annual benefit × annuity factor | International Actuarial Notation, actuarial symbols |
| Factor meaning | The annuity factor embeds both interest discounting and survival weighting | China Life Insurance Experience Mortality Table 2010-2013 |
| Link to gross premium | Gross premium = net premium ÷ (1 − expense loading ratio) | Insurance Law of the PRC, Art. 107 |