A buyer can back out of a home purchase if the property fails a mold inspection, depending on the terms of the purchase agreement. Most real estate contracts include an inspection contingency that allows the buyer to withdraw or renegotiate if serious issues like mold are discovered. If the report shows extensive contamination or costly remediation is needed, the buyer may request repairs or a price reduction. If the seller refuses, the buyer can legally cancel the deal without penalty within the contingency period. The final decision depends on contract conditions and local real estate laws.