Originally Posted by emma69

Yup, the whole 'tip the tax' thing used to be how I did it. But now with the mobile credit card machines they use, where you enter the tip %, if you notice, the % goes on the whole bill (including tax) which I am guessing most people don't entirely think about - my guess is servers end up better off with these machines as with paper, you tip your % on the base (as you see it in front of you) but on the machine the % key puts it on the whole thing (make sense?) So now I do often 'tip the tax' acknowledging that 13% post tax is pretty close to 15% pre tax.