$50 I Bond with 3.30% Fixed Rate Purchased July 1999

 Jan
1
Infla
tion
Rate
Com
posite
Rate
Feb
1
Mar
1
Apr
1
May
1
Jun
1
Jul
1
Infla
tion
Rate
Com
posite
Rate
Aug
1
Sep
1
Oct
1
Nov
1
Dec
1
1999 50.000.86%5.05%50.2050.4250.6250.8451.041999
200051.261.76%6.88%51.5451.8452.1452.4252.7253.021.91%7.18%53.3453.6453.9654.2854.602000
200154.921.52%6.39%55.2055.5055.8056.0856.3856.681.44%6.23%56.9857.2657.5657.8658.142001
200258.441.19%5.72%58.7259.0059.2659.5459.8260.120.28%3.87%60.3260.5060.7060.9061.082002
200361.281.23%5.80%61.5861.8662.1662.4662.7663.061.77%6.90%63.4263.7864.1464.5064.862003
200465.240.54%4.40%65.4865.7265.9666.2066.4466.681.19%5.72%67.0067.3067.6267.9468.262004
200568.581.33%6.00%68.9269.2669.6069.9470.3070.641.79%6.94%71.0471.4471.8672.2672.682005
200673.102.85%9.09%73.6474.2074.7475.3075.8676.420.50%4.32%76.7076.9677.2477.5277.802006
200778.081.55%6.45%78.5078.9279.3279.7480.1880.601.21%5.76%80.9881.3681.7682.1482.522007
200882.921.53%6.41%83.3683.8084.2484.6885.1285.582.42%8.22%86.1686.7487.3287.9088.502008
200989.102.46%8.30%89.7090.3290.9491.5492.1892.80-2.78%0.00%92.8092.8092.8092.8092.802009
201092.801.53%6.41%93.2893.7894.2894.7895.2895.780.77%4.87%96.1696.5696.9497.3297.722010
201198.120.37%4.05%98.4498.7899.1099.4499.78100.102.30%7.98%100.76101.42102.08102.74103.422011
2012104.101.53%6.41%104.64105.20105.76106.32106.88107.441.10%5.54%107.94108.42108.92109.42109.922012
2013110.420.88%5.09%110.88111.34111.82112.28112.76113.240.59%4.50%113.66114.08114.50114.94115.362013
2014115.780.59%4.50%116.22116.64117.08117.52117.94118.380.92%5.17%118.88119.40119.90120.42120.922014
2015121.440.74%4.80%121.92122.40122.88123.38123.86124.36-0.80%1.67%124.54124.70124.88125.06125.222015
2016125.400.77%4.87%125.90126.40126.92127.42127.94128.460.08%3.46%128.82129.20129.56129.94130.302016
2017130.681.38%6.11%131.34132.00132.66133.32134.00134.680.98%5.29%135.26135.86136.44137.04137.642017
2018138.241.24%5.82%138.90139.56140.24140.90141.58142.261.11%5.56%142.92143.56144.22144.88145.542018
2019146.221.16%5.66%146.90147.58148.28148.96149.66150.360.70%4.72%150.94151.54152.12152.72153.322019
2020153.901.01%5.35%154.58155.26155.94156.64157.32158.020.53%4.38%158.60159.16159.74160.32160.902020
2021161.480.84%5.01%162.14162.82163.50164.16164.84165.521.77%6.90%166.46167.40168.36169.30170.262021
2022171.243.56%10.54%172.72174.20175.70177.20178.72180.264.81%13.08%182.18184.10186.06188.04190.042022
2023192.043.24%9.89%193.60195.16196.74198.32199.92201.541.69%6.74%202.66203.78204.90206.04207.182023
2024208.341.97%7.31%209.60210.84212.12213.38214.66215.961.48%6.31%217.08218.20219.34220.48221.622024
2025222.780.95%5.23%223.74224.70225.68226.64227.62228.601.43%6.21%229.76230.94232.12233.30234.502025
2026235.701.56%6.47%236.96238.22239.48240.76242.04243.32

From $50.00 to $243.32 over 27.0 years = 5.95% average annual increase compounded semi-annually.

Generated  11/04/25  09:10