Serena will be back for the Hopman Cup in Perth from 3 January, and Venus two weeks later at the Australian Open.
The sisters will be absent from the eight-woman WTA Tour Championships, starting on Wednesday in Los Angeles.
Venus first picked up an abdominal tear at a tournament in Warsaw in April, while Serena underwent knee surgery in August.
Venus to miss season climax
"I'm definitely planning on playing the Australian," said Venus, speaking at at the annual WTA Tour Charities Gala and Fashion Show in Santa Monica.
"I'm disappointed I couldn't be in the championships but, the way I look at it, some things aren't meant to be.
"I'm looking forward to starting up next year. I'm doing a lot better, I'm approaching the 90th percentile, but it took a lot longer than I ever imagined."
Serena said: "I'm going to play the Hopman Cup. I really enjoyed that last year.
"We really miss being on the tour. It's such a great atmosphere, it's like one big family.
"Obviously I miss it a lot but don't want to dwell on it too much."