hello, i sold a house in 2024 and plan to sell another one in a couple of months. will i have to pay capital gains tax on the amount less than $250k?

Yes.

"Generally, you're not eligible for the exclusion if you excluded the gain from the sale of another home during the two-year period prior to the sale of your home. Refer to Publication 523 for the complete eligibility requirements, limitations on the exclusion amount, and exceptions to the two-year rule."

Reference: https://www.irs.gov/taxtopics/tc701

Hello, thank you for your reply.  Would I be able to deduct my sales cost basis since I would be subject to paying taxes and what would the tax rate be?

Yes.  You would still be able to deduct the cost basis of the house.  The tax rate would depend on your other income, but it would be a capital gains sale. 

Capital Gains