How is funding on forex positions calculated?

A tom-next rather than an interbank rate is used in the calculation of funding costs for forex and spot metals.

Tom-next is the day’s market swap rate for that pair or metal.

Example tom-next rate: -1.39/-0.39.

-0.39 would be used to calculate the funding cost on a long position.

-1.39 would be used to calculate the funding cost on a short position.

Size x (tom-next rate + admin fee)

CFD

Size means total value of lots (number of lots x value per lot)

Tom-next is the day’s market swap rate for that pair or metal

IG's charge for holding positions overnight is no more than 0.0022% a day

Three-day funding is charged on a Wednesday.

IG Academy