Hidden costs of weddings

Having your suppliers work later than your package!!

Having an on the day coordinator ensures you stick to your timeline so that you dont go over and then have your suppliers charge you for extra time.

A hidden cost of weddings can be over time. Overtime for the planner or suppliers is a big thing that happens. 
Especially if you are having fun you always want the DJ or band to do another song, this can add up.
Always check your contracts so you know how much an extra hour is going to cost you. Some can be rather pricey and you don't want to wake up in the mornings with overtime bills to pay. 

I feel another hidden cost of weddings that doesn't get spoken about often is the marriage license. As much as it's not a big amount it is still a cost that some couples dont account for. 

One hidden cost that some don't think about is going over time. I have worked at weddings where they have been held at an Air BnB or a large property and everyone is having a great time and when it comes time to finish you may ask the DJ to continue on for another hour. Always check the contract you have signed with a supplier/vendor as the quoted price for their service will be a set amount but when you start adding an extra hour to the service that has been quoted for can be quite a bit more than you may think.

e.g. A supplier may quote for 5 hours $700 and any time after that can be $150 or something similar. If you feel you may do this it is a good idea to speak to the supplier prior and have the extra money with you ready. Most suppliers don't like having to chase up couples after their honeymoon to get paid.