Some of the best business laptops for professionals on a budget include the Lenovo ThinkPad X1 Carbon, Dell Latitude 9420, and the HP EliteBook 840. These laptops offer a balance of performance and affordability and come with several features that are essential for business use. The Lenovo ThinkPad X1 Carbon is known for its durability and long battery life, while the Dell Latitude 9420 offers excellent performance and security features. The HP EliteBook 840 is a reliable and affordable option that's ideal for everyday business use.