One of the stars of London 2012, the 27-year-old has struggled with injury since winning the heptathlon title on home soil.
Ennis-Hill managed to compete in the hurdles and long jump at the Anniversary Games, but decided she would not be fit enough to complete at August's World Championships.
The Sheffield athlete admits the Achilles complaint has taken longer to heal than she had expected, but, having started jogging again this week, finally sees light at the end of the tunnel.
"It has been quite a long process, but I am recovering well," Ennis-Hill told Press Association Sport, speaking at the British Olympic Ball at the Dorchester Hotel in London.
"It is healing.
"I have been just following my rehab programme, doing what the doctors and physios tell me to do and getting back into full training slowly.
"I think every year is a big year in athletics, there is a Commonwealth Games and then another World Championships and then Olympics Rio.
"It does come around really quickly but there is always something really important to focus on each year."