Some often-overlooked costs in wedding planning include pre-wedding events, wedding favours, and post-wedding expenses like your honeymoon. Additionally, do not forget about smaller items like postage for invitations, gratuities for vendors, alteration costs for attire, and beauty treatments. Remember that taxes and service charges can significantly inflate your total cost, so ask your vendors whether these are included in their quotes. Having a detailed budget where you track all your expenses, no matter how small, can help you avoid unexpected surprises.