The numbers here sit close to the national middle.
Nebraska's top state income tax rate is 5.84%, and it applies to capital gains without a separate carve-out. Combined with the federal 20% rate and 3.8% NIIT, a property sale can reach 29.6% total.
Three layers make up that 29.6%: 20% federal, 3.8% NIIT, and 5.84% Nebraska state tax. None of the three is optional once a sale closes without a deferral strategy in place.
As a hypothetical, not tied to any real property, take a $250,000 gain. At Nebraska's combined 29.6% rate, that works out to roughly $74,000 owed across all three layers. For an actual sale, including depreciation recapture, the capital gains tax calculator gives a more precise number.
That $74,000 stays deferred as long as the proceeds go into a replacement property through a 1031 exchange instead of a bank transfer. Model it in the 1031 exchange calculator and check your deadlines with the timeline calculator.