$500 I Bond with 1.00% Fixed Rate Purchased December 2005

 Infla
tion
Rate
Com
posite
Rate
Jan
1
Feb
1
Mar
1
Apr
1
May
1
Jun
1
Infla
tion
Rate
Com
posite
Rate
Jul
1
Aug
1
Sep
1
Oct
1
Nov
1
Dec
1
2005 500.002005
20062.85%6.73%502.80505.60508.40511.20514.00516.800.50%2.01%517.60518.60519.40520.20521.20522.002006
20071.55%4.12%523.80525.60527.40529.20531.00532.801.21%3.43%534.40535.80537.40538.80540.40542.002007
20081.53%4.08%543.80545.60547.60549.40551.20553.002.42%5.86%555.60558.40561.00563.80566.40569.202008
20092.46%5.94%572.00574.80577.60580.40583.20586.20-2.78%0.00%586.20586.20586.20586.20586.20586.202009
20101.53%4.08%588.20590.20592.20594.20596.20598.200.77%2.55%599.40600.80602.00603.20604.60605.802010
20110.37%1.74%606.60607.60608.40609.40610.20611.002.30%5.62%613.80616.60619.60622.40625.20628.202011
20121.53%4.08%630.40632.40634.60636.80638.80641.001.10%3.21%642.80644.40646.20647.80649.60651.202012
20130.88%2.77%652.60654.20655.60657.20658.80660.200.59%2.19%661.40662.60663.80665.00666.20667.402013
20140.59%2.19%668.60669.80671.00672.20673.40674.800.92%2.85%676.40678.00679.60681.20682.80684.402014
20150.74%2.49%685.80687.20688.60690.00691.40693.00-0.80%0.00%693.00693.00693.00693.00693.00693.002015
20160.77%2.55%694.40696.00697.40698.80700.40701.800.08%1.16%702.40703.20703.80704.60705.20705.802016
20171.38%3.77%708.00710.20712.40714.60716.80719.200.98%2.97%721.00722.80724.60726.40728.00729.802017
20181.24%3.49%732.00734.00736.20738.20740.40742.601.11%3.23%744.60746.60748.60750.60752.60754.602018
20191.16%3.33%756.60758.80760.80763.00765.00767.200.70%2.41%768.80770.20771.80773.40774.80776.402019
20201.01%3.03%778.40780.40782.20784.20786.20788.200.53%2.07%789.60791.00792.20793.60795.00796.402020
20210.84%2.69%798.20800.00801.80803.60805.40807.201.77%4.56%810.20813.20816.40819.40822.60825.602021
20223.56%8.16%831.20836.60842.20848.00853.60859.204.81%10.67%866.60874.20881.80889.40897.20905.002022
20233.24%7.51%910.60916.20921.80927.60933.20939.001.69%4.40%942.40945.80949.20952.80956.20959.602023
20241.97%4.96%963.60967.40971.40975.40979.40983.401.48%3.97%986.60989.80993.20996.40999.601,003.002024
20250.95%2.91%1,005.401,007.801,010.201,012.801,015.201,017.601.43%3.87%1,020.801,024.201,027.401,030.601,034.001,037.202025
20261.56%4.14%1,040.801,044.401,047.801,051.401,055.001,058.60

From $500.00 to $1,058.60 over 20.5 years = 3.69% average annual increase compounded semi-annually.

Generated  11/04/25  09:10