Unfortunately, there is no one-size-fits-all answer to this question. Generally speaking, many couples estimate that around 70% - 80% of their RSVPs will show up on the wedding day. However, this can vary drastically depending on factors such as location and time of year. Additionally, the percentage may be lower if you have invited a lot of out-of-town guests or if the wedding is on a holiday weekend. The best way to get an accurate headcount is to keep track of your RSVPs closely and follow up with any guests who have yet to RSVP. This will ensure that you can plan ahead for enough food, seating, and other necessary arrangements.