$1,000 I Bond with 0.20% Fixed Rate Purchased July 2010

 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
2010 1,000.000.77%1.74%1,001.601,002.801,004.401,005.601,007.202010
20111,008.800.37%0.94%1,009.601,010.401,011.201,012.001,012.801,013.602.30%4.80%1,017.601,021.601,025.601,029.601,034.002011
20121,038.001.53%3.26%1,040.801,043.601,046.401,049.201,052.001,054.801.10%2.40%1,056.801,059.201,061.201,063.201,065.202012
20131,067.600.88%1.96%1,069.201,071.201,072.801,074.401,076.401,078.000.59%1.38%1,079.201,080.401,081.601,082.801,084.002013
20141,085.600.59%1.38%1,086.801,088.001,089.201,090.401,092.001,093.200.92%2.04%1,095.201,096.801,098.801,100.801,102.402014
20151,104.400.74%1.68%1,106.001,107.601,109.201,110.401,112.001,113.60-0.80%0.00%1,113.601,113.601,113.601,113.601,113.602015
20161,113.600.77%1.74%1,115.201,116.801,118.401,120.001,121.601,123.200.08%0.36%1,123.601,124.001,124.401,124.401,124.802016
20171,125.201.38%2.96%1,128.001,130.801,133.601,136.401,139.201,142.000.98%2.16%1,144.001,146.001,148.001,150.401,152.402017
20181,154.401.24%2.68%1,156.801,159.601,162.001,164.801,167.201,170.001.11%2.42%1,172.401,174.801,177.201,179.601,181.602018
20191,184.001.16%2.52%1,186.401,188.801,191.601,194.001,196.401,198.800.70%1.60%1,200.401,202.001,203.601,205.201,206.802019
20201,208.401.01%2.22%1,210.801,212.801,215.201,217.201,219.601,222.000.53%1.26%1,223.201,224.401,226.001,227.201,228.402020
20211,229.600.84%1.88%1,231.601,233.601,235.201,237.201,239.201,241.201.77%3.74%1,245.201,248.801,252.801,256.801,260.402021
20221,264.403.56%7.33%1,272.001,279.601,287.201,295.201,302.801,310.804.81%9.83%1,321.201,332.001,342.801,353.601,364.402022
20231,375.203.24%6.69%1,382.801,390.401,398.001,405.601,413.601,421.201.69%3.58%1,425.601,429.601,434.001,438.001,442.402023
20241,446.801.97%4.14%1,451.601,456.801,461.601,466.801,471.601,476.801.48%3.16%1,480.801,484.401,488.401,492.401,496.402024
20251,500.000.95%2.10%1,502.801,505.201,508.001,510.401,513.201,515.601.43%3.06%1,519.601,523.201,527.201,531.201,534.802025
20261,538.80

From $1,000.00 to $1,538.80 over 15.5 years = 2.80% average annual increase compounded semi-annually.

Generated  05/01/25  10:59