You can check your tire tread depth using a simple penny test or by looking for built-in wear bars on the tire itself.
The penny test involves inserting a penny into the tire's deepest groove with Lincoln's head facing inward. If you can see the top of Lincoln's head, your tread is likely below the recommended minimum depth of 2/32 of an inch. Alternatively, most tires have small raised bars in the grooves; if the tread is level with these wear bars, it's time for new tires.
Tire condition is just one factor in vehicle safety; regular professional inspections are recommended.
Are there ways to save money on new tires?
Look for seasonal sales, consider less premium brands that still offer good quality, or ask about package deals that might include installation and balancing. Off-brand tires can sometimes be a good value.