Fees for domain applications with a LOCAL registrant address are:

3rd level domain (e.g., name.co.tt) 2nd level domain (e.g. name.tt)
Registration fee $50US (includes maintenance for first 3 years) $500US (includes maintenance for first 2 years)
Maintenance fees $50US every 3 years (from 4th year after registration) $500US every 5 years (from 3rd year after registration)
Domain Name change Same as registration of a new domain Same as registration of a new domain

Fees for domain applications with a FOREIGN registrant address are:

3rd level domain (e.g., name.co.tt) 2nd level domain (e.g. name.tt)
Registration fee $100US (includes maintenance for first 3 years) $1000US (includes maintenance for first 2 years)
Maintenance fees $100US every 3 years (from 4th year after registration) $1000US every 5 years (from 3rd year after registration)
Domain Name change Same as registration of a new domain Same as registration of a new domain

Important Notes: