It says airlines are the greatest offenders, and highlighted the way in which Britain's two largest cut-price airlines add on charges: easyJet imposes an £8 "booking fee" for all transactions except for payments made by Visa Electron.
The only other dish with an add-on charge that we sampled was wok-seared sesame-crusted tuna ($6 more).
Unfortunately, the Evo 3D will cost you an extra $10/month because of Sprint's Premium Data add-on charge for smartphones.
Lower-income people, meanwhile, disproportionately use check-cashing services, which are known for their high add-on charges.
For budget airline trips, this can often mean that the fare is much less than the add-on charges.
Treloar says he wants the report to start "smoking out" the misuse of baggage fees and other confusing add-on charges.
If anybody knows about add-on charges that can spark a "What's this?" at the hotel check-out counter, it is probably Bjorn Hanson.
The same study by Amadeus and IdeaWorks that revealed significant increases worldwide in ancillary fees also ranked Tiger Airways fifth in the world for add-on charges, with 20.5 percent of its total revenue coming from ancillary fees.
Metro Bank This relatively new bank, with branches only in the London area, has no add-on charges for foreign transactions (purchases or withdrawing cash from ATMs) made on the debit card that comes with the account.
For passengers, ancillary fees are a large and increasing part of air travel costs, in some cases accounting for an additional 20 percent of the cost of a ticket, counting add-on charges for things like checked bags, changed itineraries, in-flight food, seat selection and other services.
The big three have cushy and lucrative pricing models devised, from the pre-Internet era, around complex proprietary networks, add-on charges for things like printing and connect time and even monthly fees.
