The tax treaty
None
The United States has no income tax treaty with Croatia. Dividends, interest and royalties from US sources are withheld at the standard 30%. Money you earn for work you do in Croatia isn't US-source income, so nothing is withheld on it. A US-Croatia treaty was signed in 2022 and amended in April 2026, but it isn't in force until both countries ratify it.
Stripe
Available locally
Stripe takes businesses registered in Croatia, so you don't need a US company to use it. A US LLC gets you a US Stripe account instead, paid out in dollars to a US bank, which helps when most of your customers are American.
Banking
No Mercury
Mercury doesn't open accounts for founders living in Croatia. It goes by where you live, not your passport, so a Croatian citizen living in another country may still qualify. Payoneer and Wise Business are the usual alternatives to check, and each has its own rules about where owners can live. 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 Croatia.
The time difference
UTC+2
New York is 6 hours behind Croatia 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.