I never tell them my current salary if I'm trying to make a big jump. If I were trying to go from say, 50K to 55K, I don't mind mentioning my salary, because they know that they'll have to go above it to get me to make a move. But jumping from 75K to 90K, I wouldn't mention it all. Most employers will think"well, if you're making 75K now, I'm sure as hell not giving you a 15K raise, because I can probably get you for 80 instead."Ask for what you want but take things like benefits, bonuses and time off into account. You can provide the target you want (let's say 55k) along the lines of "I'm currently making 40k here but growth is limited and I'm currently targeting 55k for my next position, based on my experience and market value. If this is outside of the range for the position I'm open to negotiating a fair value taking into account the benefits package offered."