The tax treaty
None
The United States has no income tax treaty with the Dominican Republic. Dividends, interest and royalties from US sources are withheld at the standard 30%. Money you earn for work you do in the Dominican Republic isn't US-source income, so nothing is withheld on it.
Stripe
Not available locally
Stripe doesn't take businesses registered in the Dominican Republic. A US LLC with an EIN and a US bank account is a US business, so it can apply for a US Stripe account, and that's often the main reason founders in the Dominican Republic form one.
Banking
Mercury available
Mercury opens accounts remotely for US companies whose founders live in the Dominican Republic. It asks for the EIN, the formation documents, your passport, a real business address and a description of the company's existing or planned US operations. Relay asks a non-US owner for a US address, an ITIN or Social Security Number and a US operating presence, so it rarely suits a founder living in the Dominican Republic.
The time difference
UTC-4
New York keeps the same time as the Dominican Republic in summer. Everything we do is in writing, through your dashboard and email, and we reply within one business day, so the time difference rarely slows anything down.