How much does a custom watch cost?

It depends on the base watch and the parts you choose. Budget builds on a Casio (A168, F-91W, AE-1200, or Duro) can cost as little as $20–100 all-in, while a Seiko mod with a quality dial, sapphire crystal, and bezel often runs $150–400 or more. Custom dials, custom cases, or commissioning a professional modder add to that. Planning your build in 3D on MODDS.WATCH first helps you avoid buying parts you don't end up using, which keeps the real cost down.