Yes, you can decline or cancel a guest on Airbnb as a host, but there are specific rules to follow in 2026 to avoid penalties. If a guest sends an inquiry or a booking request, you can simply click "Decline" if you are uncomfortable with the guest’s profile, their reviews, or if their plans don't fit your house rules. However, if you have Instant Book enabled, you can only cancel without a penalty if you have a "valid reason," such as a guest clearly stating they plan to break a rule (like bringing a pet to a no-pet home) or if they have several negative reviews that concern you. As of 2026, Airbnb has increased its monitoring of cancellations to prevent discrimination; if a host cancels too many reservations without a valid safety or rule-breaking concern, they may face financial fees, a blocked calendar for those dates, or even loss of "Superhost" status. It is always best to message the guest first to see if you can resolve any concerns before officially hitting the decline button.