During the fourth quarter, we will complete the separation of Kyndryl, which is on track for November 3rd. The fourth quarter, therefore, is a major milestone as we transition to the future IBM.
Now let me provide some color on three areas for the fourth quarter. First, the revenue trajectory of the new segments. Second, I’ll comment on our tax rate. And third, the impact of the separation of Kyndryl to IBM’s consolidated results for November and December on an operating basis.
I’ll start with the revenue trajectory of our segments as we’ll report them in the fourth quarter. As always, I’ll talk about it on a constant currency basis. But I’ll remind you the US dollar continues to strengthen and would be a one to two point headwind to growth based on current spot rates. To provide a better view of trends, I’ll focus on the growth rates before the revenue from incremental sales to Kyndryl. We see continued momentum in our growth vectors of software and consulting. We expect our Software revenue growth rate to improve versus the third quarter. And in IBM Consulting, we again expect double-digit revenue growth. In Infrastructure, given product cycle dynamics, we expect fairly consistent performance with the third quarter, which was a high single-digit decline.
Second, tax. I mentioned the timing of discrete tax benefits occurred earlier than we previously anticipated, as we prepare for the Kyndryl separation. We still expect our full year tax rate to be in the low teens range, in line with what we indicated back in January. That’s our all-in rate, including discrete tax items, and implies a fourth quarter tax rate in the high teens.
And then finally, IBM’s fourth quarter consolidated results will reflect the Kyndryl separation. I’ll frame the revenue and earnings per share implications based on the last couple of years. Kyndryl historically