15 Hidden Costs That Can Blow Your Wedding Budget Photo credit: CC license by Kirk Bravender 8. Bachelor/Bachelorette Party Talk to your attendants ahead of time and see what they are planning your bachelorette/bachelor party. Finding out at the last minute that they were expecting you to foot the bill can add significant dollars to your budget. If that happens, keep it simple with a small gathering at your house or apartment for drinks, snacks and help with packing or last-minute decorations. Prev8 of 16Next Facebook Comments comments