What are the hidden costs in software projects? — answered by Engineer Saeed Baatiah
Six items usually forgotten at budgeting time: domain and hosting annually, an SSL certificate if not included, payment gateway fees and their per-transaction cut, the cost of setting up and connecting e-invoicing, content writing and professional photography, and post-launch maintenance and security updates. Add 15 to 25 percent on top of the development price as a first-year reserve and you will survive most surprises.