[mgkimsal]

It's hard to raise rates on existing clients in a short time frame - giving them some notice (3 months?) would be more professional. Your current predicament is not their problem, really. However, if you could offer extra services (like, you never did DB work for them, now you'll do DB work) having a different rate for different types of work is more palatable.

[datawalke]

Oh, I mean raising my rates on new clients only. The rest of my clients would receive an early notice.