To understand the "cap" you must first understand that PTAs are paid by the hour, not salary, and this is enforced by most companies' HR department. With that in mind, you can now determine the true cap, which is highly dependent on location. A PTA working in a remote town of McAllen, Texas, on the Texas/Mexico border might get paid $80,000 per year, cause no one wants to work at these rural(sometimes high-crime, poverty-stricken) locations. In Florida, the highest I've seen is about $35/hr at an SNF in a rural area of Florida. Outpatient or a private practice pays $21-$23/hr, much less. Now, someone working 2,080 hrs per year will cap at $72,800 at this $35/hr payrate. However, there are PTAs who make over $100K per year. How? By working many hours, 60-70 per week. How? By working multiple jobs, for example they may have 40 hr/wk full-time job, but work more doing PRN/per-diem on the weekends at hospitals or SNFs. Also, there are PTAs who work 13-week assignments all over the country, mostly sent to rural areas, they too can get past the cap. Someone working HomeHealth for 3-4 companies simultaneously can also break the cap. There is definitely a cap for PTAs and it comes early, within the first 3 years, but it's the per-hour that is capped. If you're willing to work more hours, you can make more. There are plenty of opportunities to work as many(or as few) hours as you want. Hope this helps.