No state income tax means Alaska sellers keep more of the federal math.
Alaska is one of a handful of states that don't tax income at all, capital gains included. A property seller here only answers to the IRS, and the ceiling on that federal bill is 23.8%.
There's only one layer to account for once you strip out the state piece; see it applied to your own numbers in the capital gains tax calculator.
Even with no state bite, deferring the federal 23.8% is still real money on a large sale. Run the numbers in the 1031 exchange calculator and pull your exchange deadlines from the timeline tool.