[jkaplowitz]

Thanks. I guess you're right that people like me who don't trade billions per month pay their most expensive forex rates. But it's not a cutoff, just a price tier, and still far cheaper than TransferWise or any other option I know of for exchanging non-institutional quantities of currency.

To clarify the terms in that table: one basis point is 1/100 of 1%, as they themselves clarify in a footnote rather than assuming all readers know it. And trade value is, well, the amount you trade. :) The footnote for that term clarifies that they convert and charge this commission in whatever currency you have configured as the base currency for your account. (For example, I've chosen USD for my base currency since most of my transactions are US stocks on US exchanges, even though I'm in Canada and therefore the legal entity I'm officially dealing with is IB's Canadian arm.)

So, to convert anywhere up to US$100,000 (or its foreign currency equivalent) to any other currency, they charge their minimum fee of US$2 - mathematically, 2 / (1/100 of 0.20) = 100,000. Above that and up to US$1 billion, you take the amount you're trading, multiply by 1/100 of 0.20, and that's the fee.

$2 is a ridiculously low fee to convert five USD figures or less of currency, given that they also directly pass through the very tight exchange rates collectively quoted by their suppliers without building any profit for them into the rate itself.