What happens if I change my mind after signing the purchase contract?

After the purchase contract ("köpeavtal") is signed, you're legally bound. If you back out without valid grounds (like a loan clause ("låneklausul")), the seller can claim damages ("skadestånd") – usually the deposit ("handpenning") plus any additional costs. The seller can also demand completion ("fullföljande") through court. If the seller backs out, you can claim damages ("skadestånd") and possibly demand completion. Think carefully before signing and make sure you have conditions that protect you if something unexpected happens. Only sign when you're certain.