It’s not uncommon for private equity firms to offer takeover candidates a break-up fee to walk away. But these fees are rising with the continued financial instability. And higher fees could put the breaks on dealmaking.

Private equity firm Cerberus is now offering equipment rental company United Rentals (URI) $100 million to walk away from their proposed deal. With the deal in shambles, URI stock has taken a beating, and it’s not the only one.