At USRowing, you do.
All athletes winning berths at the selection trials must submit on site, in conjunction with their intent to compete, a payment per athlete to cover the expenses of food, lodging, and local transportation during the world championships. Proposed coaches of boats at the world championships must be SafeSport compliant and submit payment in the full amount at the end of trials as well. All fees for the various 2018 World Championships will be posted by June 4th.
The U23 World Championships trials winner fee is $2070.
The Junior World Championships trials winner fee is $2076.
The Senior and Para World Championships trials winner fee is $2913.
The final price does not include airfare, nor does it include the cost of equipment. Those plans and expenses are left to the coach and athletes.