In the (completely understandable) excitement about menu choices and wine, we completely forgot to include the venue's service charge in our wedding budget. It's often mentioned at the end of an agreement so isn't in the final quoted figure. Our service charge will be 10 percent of our final bill; 10 percent to 15 percent seems to be the standard in the UK, so take a similar figure into account when planning your celebration, plus any further tips you plan to give on the day.