There are a lot of variables at play as you need to take the following into account:
Are you going to go back to school full-time?
Odds are that going back to school full time is not going to be to your advantage both due to the financial loss as well as the fact that college culture is no necessarily something that is best enjoyed once you are older.
Do you have the time to invest in night school programs?
If you don't go back to school full time then the next best thing is night school, or an online degree from a reputable school. The catch is that it generally does take you longer to finish a night school program (figure six years unless you are taking classes during the summer) which means that you are going to be giving up the time in the evenings and on the weekends. This can be tough for a number of reasons and might actually prove to be a greater investment than just monetary concerns.
Who is going to pay for the program?
This needs to be mentioned for obvious reasons because the chances are pretty good that while you might make back money you invest in the degree over the remainder of your career, it is questionable if you will come out significantly ahead by by the time you retire. That said though, if you work for a larger company with education benefits then they might pay for the degree in which case your only investment is the time as opposed the money.
Do you really need a Bachelors degree?
If you are just looking to get past the HR filters, then an Associates degree might be enough in and of itself. No guarantees here though and most Associates degree programs tend to focus more on the applied programming skills as opposed to theory which is what you might be a bit lacking unless you studied on your own.
Do you really want to get a degree in general?
If you don't want to get a degree, then don't get one. Odds are that you have enough experience at this point that not having a degree isn't as big of a hindrance as you might think and while some some large companies might not be interested in you, at this point getting the degree might not even help. There is something to think about though, most companies don't really care as much as they let on in regards to what you have the degree in and if you are thinking about taking courses for personal development then you might want to just think about doing that instead.