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年金现值

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年金现值(Present value of annuity)

什么是年金现值

  年金现值是指将在一定时期内按相同时间间隔在每期期末收入或支付的相等金额折算到第一期初的现值之和。

年金现值的计算

  年金现值是年金终值的逆计算。

  计算公式:

  P=Bfrac{1-(1+i)^{-n}}{i}

  年金现值因子:frac{1-(1+i)^{-n}}{i},是普通年金1元、利率为i、n期的年金现值,记作(P/A,i,n)。

  推导过程:P=B(1+i)^{-1}+B(1+i)^{-2}+cdots+B(1+i)^{-(n-1)}+B(1+i)^{-n}……………………①

  将①式乘以(1+i),则:

  (1+i)P=B(1+i)^0+B(1+i)^{-1}+dots+B(1+i)^{-(n-2)}+B(1+i)^{-(n-1)}………………………②

  ②-①,则:

  (1 + i)P %26minus; P = B %26minus; B(1 + i) %26minus; n

  P(1 + i %26minus; 1) = B[1 %26minus; (1 + i) %26minus; n]

  ∴P=Bfrac{1-(1+i)^{-n}}{1}

计算年金现值的举例

  要得到按6%折现、期数为3、每期为1元的普通年金的现值,可按下列方法计算,如图1所示:

  年金现值

  在第一期末收到1元的现值为0.943元,第二期末收到1元的现值为0.890元,第三期末收到到1元的现值为0.840。年金的现值就是各个现值的总和2.673元。

  年金现值P的计算公式是:

  =frac{1}{(1+i)^{-3}}+frac{1}{(1+i)^{-2}}+frac{1}{(1+i)}=0.840+0.890+0.943=2.673(元)        上式可转化为:

  frac{1-(1-i)^{-n}}{i}=frac{1-0.83962}{0.06}=2.673(元)     

年金现值系数表

n1%2%3%4%5%6%8%10%12%14%15%16%18%20%22%24%25%30%35%40%45%50%
10.9900.9800.9700.9610.9520.9430.9250.9090.8920.8770.8690.8620.8470.8330.8190.8060.7990.7690.7400.7140.6890.666
21.9701.9411.9131.8861.8591.8331.7831.7351.6901.6461.6251.6051.5651.5271.4911.4561.441.3601.2891.2241.1651.111
32.9402.8832.8282.7752.7232.6732.5772.4862.4012.3212.2832.2452.1742.1062.0421.9811.9521.8161.6951.5881.4931.407
43.9013.8073.7173.6293.5453.4653.3123.1693.0372.9132.8542.7982.6902.5882.4932.4042.3612.1661.9961.8491.7191.604
54.8534.7134.5794.4514.3294.2123.9923.7903.6043.4333.3523.2743.1272.9902.8632.7452.6892.4352.2192.0351.8751.736
65.7955.6015.4175.2425.0754.9174.6224.3554.1113.8883.7843.6843.4973.3253.1663.0202.9512.6422.3852.1671.9831.824
76.7286.4716.2306.0025.7865.5825.2064.8684.5634.2884.1604.0383.8113.6043.4153.2423.1612.8022.5072.2622.0571.882
87.6517.3257.0196.7326.4636.2095.7465.3344.9674.6384.4874.3434.0773.8373.6193.4213.3282.9242.5982.3302.1081.921
98.5668.1627.7867.4357.1076.8016.2465.7595.3284.9464.7714.6064.3034.0303.7863.5653.4633.0192.6652.3782.1431.947
109.4718.9828.5308.1107.7217.3606.7106.1445.6505.2165.0184.8334.4944.1923.9233.6813.5703.0912.7152.4132.1681.965
1110.3679.7869.2528.7608.3067.8867.1386.4955.9375.4525.2335.0284.6564.3274.0353.7753.6563.1472.7512.4382.1841.976
1211.25510.5759.9549.3858.8638.3837.5366.8136.1945.6605.4205.1974.7934.4394.1273.8513.7253.1902.7792.4552.1961.984
1312.13311.34810.6349.9859.3938.8527.9037.1036.4235.8425.5835.3424.9094.5324.2023.9123.7803.2232.7992.4682.2041.989
1413.00312.10611.29610.5639.8989.2948.2447.3666.6286.0025.7245.4675.0084.6104.2643.9613.8243.2482.8142.4772.2091.993
1513.86512.84911.93711.11810.3799.7128.5597.6066.8106.1425.8475.5755.0914.6754.3154.0013.8593.2682.8252.4832.2131.995
1614.71713.57712.56111.65210.83710.1058.8517.8236.9736.2655.9545.6685.1624.7294.3564.0333.8873.2832.8332.4882.2161.996
1715.56214.29113.16612.16511.27410.4779.1218.0217.1196.3726.0475.7485.2224.7744.3904.0593.9093.2942.8392.4912.2181.997
1816.39814.99213.75312.65911.68910.8279.3718.2017.2496.4676.1275.8175.2734.8124.4184.0793.9273.3032.8442.4942.2191.998
1917.22615.67814.32313.13312.08511.1589.6038.3647.3656.5506.1985.8775.3164.8434.4414.0963.9423.3102.8472.4952.2201.999
2018.04516.35114.87713.59012.46211.4699.8188.5137.4696.6236.2595.9285.3524.8694.4604.1103.9533.3152.8502.4972.2201.999
2118.85617.01115.41514.02912.82111.76410.0168.6487.5626.6866.3125.9735.3834.8914.4754.1213.9633.3192.8512.4972.2211.999
2219.66017.65815.93614.45113.16312.04110.2008.7717.6446.7426.3586.0115.4094.9094.4884.1293.9703.3222.8532.4982.2211.999
2320.45518.29216.44314.85613.48812.30310.3718.8837.7186.7926.3986.0445.4324.9244.4984.1373.9763.3252.8542.4982.2211.999
2421.24318.91316.93515.24613.79812.55010.5288.9847.7846.8356.4336.0725.4504.9374.5074.1423.9813.3272.8552.4992.2211.999
2522.02319.52317.41315.62214.09312.78310.6749.0777.8436.8726.4646.0975.4664.9474.5134.1473.9843.3282.8552.4992.2221.999
2622.79520.12117.87615.98214.37513.00310.8099.1607.8956.9066.4906.1185.4804.9564.5194.1513.9873.3292.8552.4992.2221.999
2723.55920.70618.32716.32914.64313.21010.9359.2377.9426.9356.5136.1365.4914.9634.5244.1543.9903.3302.8562.4992.2221.999
2824.31621.28118.76416.66314.89813.40611.0519.3067.9846.9606.5336.1525.5014.9694.5284.1563.9923.3312.8562.4992.2221.999
2925.06521.84419.18816.98315.14113.59011.1589.3698.0216.9836.5506.1655.5094.9744.5314.1583.9933.3312.8562.4992.2221.999
3025.80722.39619.60017.29215.37213.76411.2579.4268.0557.0026.5656.1775.5164.9784.5334.1603.9953.3322.8562.4992.2221.999
4032.83427.35523.11419.79217.15915.04611.9249.7798.2437.1056.6416.2335.5484.9964.5434.1653.9993.3332.8572.4992.2221.999
5039.19631.42325.72921.48218.25515.76112.2339.9148.3047.1326.6606.2465.5544.9994.5454.1663.9993.3332.8572.4992.2221.999
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