I am not going to pad this with rainbows and lollipops but I will be tsraight up.
For what you do, a few years back you would have been considered underpaid. At this point in time, MOST newer admins are finding the same issues,EVERYONE has a cert these days and IT jobs are losing thier elite status and becoming just another job.
the question you need to ask is, do you think you could make more money somewhere else utilizing another skill?
I know I can make more money as a F/T air care certified mechanic again, but it beats you up and I can't see a healthy life ahead if I stay in the industry, so it's a sideline.
I also get a fair residual icome from working in the music industry, but it still doesn't top my IT salary.
when I got sick of working for nothing, I went out on my own and got VERY lucky and ended up making more at home than I could at work, not a sure thing to persue though, a major risk and I DID get lucky.
All in all, if you work for somebody else you will always feel underpaid. I know guys that make a few hundred thousand a year that are AlWAYS bitching about how much money they make the boss and how little they earn for themselves.
I know first hand that it's hard living check to check because I've done it, for several years I couldn't pay anything off completely and just chiped away at bills while sinking father down the hole. It's reality mate and sorry but even if your employer boosted you a few hundred bucks a month you would STILL be in the same boat, believe it or not.
Work on reducing your expenditures to meet your salary, it's easier than doing it the other way around. I know what you're thinking "easy for him to say! He doesn't understand the position I am in". Yes I do, believe me I do and it is easier said then done, but there's only ONE person that can help you out, yourself. Tacky I know, but true.
I would go to the boss and just be straight up.
"I know you are paying me a FAIR wage but I am just finding it really hard to get by, it is effecting my work, my attitude and these expnses are like a cloud over me all the time, it seems I can't keep up yet alone get ahead."
Most bosses appreciate a straight up employee and will work to make things better for you. Explain that you would like to further your training and yet cannot afford to, you are feeling caught between a rock and a hard place even though you are happy to at least be employed by a good company.
I went that route on one occasion against a tightwad who everyone said is like getting blood from a stone. He was MORE than happy to give a SMALL (and I mean SMALL) raise (a good start) and then offered me other ways to earn some extra money within the company from business generated online, launching new products and gaining a bit from online referrals etc.
So if I was you and judging by the honesty of your post, I would go to the boss with the same informtion you provided here. You love your job, you love the compnay, you love being in IT and are happy to have found work when so many with greater certs are still looking for work. You just need a BIT of a boost to keep your head above water, and you will work on getting your expenses down a bit.
Best of luck to you, keep us posted on how things transpire for you and keep your chin up. Remember, in a country with many unemployed QUALIFIED IT staff, you have a job.