For Passport applications by mail-Adult Passport Renewals (DS-82 only):

Online fee payment at https://www.pay.gov/public/form/start/1156527186/ . After successfully paying the fee, you must PRINT out the electronic payment confirmation you receive via email and include it in the application package you send to the Embassy

For Passport Applications in Person - Minors, First Adult Passport, First-Time Applicants, Lost, Stolen or Damaged Passports (DS-11 only):

Online fee payment at https://www.pay.gov/public/form/start/1274042472/ . After successfully paying the fee, you must PRINT out the electronic payment confirmation you receive via email and bring it along with the application package to the Embassy or Consulate. If you are paying online for an emergency passport, pay with a credit card instead of other payment methods to avoid processing delays.

Cash: For payments in cash, please bring the exact amount in U.S. dollars (we cannot make change for payments in U.S. dollars) or the equivalent fees in Euros (change is available for Euros). Cash is not accepted at the Consular Agencies.

Credit Cards: We accept major credit cards, U.S. dollars and Euros. Virtual cards/contactless payments are not accepted.

Payment by personal checks and travelers’ checks is not accepted.

More information can be found at https://es.usembassy.gov/fees/ .