Rental arbitrage – leasing a property long-term and re-renting it short-term on platforms like Airbnb – can be a powerful way to build income without owning real estate. But there’s one key skill that separates successful operators from those who burn out: understanding your profit margins. Knowing how to calculate your STR profitability formula  helps you plan smarter, scale sustainably, and make confident investment decisions. In this post, we’ll break down the formula step