We gave ourselves pretty generous budget (35K) originally considering we should only have about 55-60 guests. We stayed within budget on food and site fees, but went over budget on many other items such as photography. The thing is even though photography is not as high a priority to me, it is to my fiancé. The photographer we both loved and thus booked turned out to be one of the higher end ones. So there goes an extra few Ks. To us, it's hard to stay within budget because we both kind of want "the best" for everything (That is still within our means, and of course "the best" can be subjective.) Originally we gave ourselves 3 priorities like what you hear people suggest you to do. But very soon we realized it's become a compulsion and the high standard goes beyond those 3 priorities, extending from one vendor to the next. It doesn't help FI is very generous with me. Another reason is because I'm far from being a DIY person. DIY can really help you cut costs. But I'm not crafty, and FI would rather we just pay someone else to do it so we don't have to deal with it. As a result of these few factors, now with our small wedding we're at about $43k, and we're not even done yet. I guess you can say we don't have enough self control, and that my FI spoils me too much.