This is not fully accurate just rough way to explain if you really wanted to: Calculate the Gain: Sale price ($100,000) minus your original cost (e.g., $20,000) = $80,000 gain. - Tax Rate: Depends on your income. At 15% (common for middle incomes), tax on $80,000 is $12,000. - State Taxes: Some states tax gains (e.g., California up to 13.3%), others don’t (like Texas). Check your state’s rules. If they don't want to get taxed on it they could also do a 1031 exchange with the 100k and put it into another property. Their are other ways to reduce the tax implication but better they talk with their CPA.