The short answer
A professionally installed epoxy floor on properly prepped concrete often lasts 5 to 10 years or more in a home garage. Commercial floors see heavier traffic and may need attention sooner. The wide range has one main cause: preparation.
Why some floors fail early
Almost every early epoxy failure traces back to the concrete, not the resin. Moisture pushing up through the slab can lift a coating in months. Oil soaked deep into old concrete blocks adhesion. A surface that was only acid-etched instead of ground gives the epoxy nothing to grip. These are all prep problems — and all of them are caught by testing before the job starts.
What wears a floor down
Hot tires, road salt, and dragged equipment wear the topcoat first. That is normal. The topcoat is the sacrificial layer — it takes the abuse so the color coats underneath survive. When the topcoat starts looking dull, a fresh topcoat brings the floor back without redoing the whole system.
How to get the long end of the range
Keep the floor clean — grit under tires grinds like sandpaper. Rinse road salt off in winter instead of letting it sit. Do not drag sharp metal across it. And have the topcoat refreshed when it dulls instead of waiting for wear to reach the color coat. Our maintenance guide covers the full routine.