Yes, you can pay online payment by Credit card. For the trip booking it is free to book. We do not take any charge while trip booking online. Here is the link: https://www.nepalmotherhousetreks.com/custom-booking   But for the remaining payments on arrival, it will be best if you can pay by cash USD (notes should be dated/Series after 2000, older than this date is not valid to exchange in Nepal/Newest bills with 100 would be the best) rather than Cards, or any currency after your arrival. But if it is complicated for you then, we accept credit cards also (+ 4% extra charge on it).