Question for anyone with a 401K

At my job we are given a 4% COLA increase every year.Im eligible to start paying into our 401K, of which my company matches up to 3%.My boss told me if I took this option, my next raise would only be 1% to "balance it out". Im new to all this, is that normal? Or am I being jipped?
      Answer1:No its not normal and your boss is just trying to rationalize why he doesnt want to give you a higher raise. I have almost the same set up at my company and my raise is seperate from my company bonus match.
      Answer2:Ive never heard of a COLA raise being offset by 401k matching. If your company has a Human Resources Dept, check with them.Even if it is true, go with the 401k.
      Answer3:Number one your boss may not know what he or she is talking. I work in Benefits and I have never heard of a company not giving you a raise because you choose to be in the 401(k).Go talk to the person that handles your benefits and if that is your boss ask to see the Plan Booklet.
      Answer4:No, that is not "normal," although it may be standard practice at your company. I would suggest talking to other employees at your company and/or you HR department.