The financial watchdog is keeping a close eye on the fees being charged by KiwiSaver providers

The Financial Market Authority's latest KiwiSaver annual report shows fund managers charged almost 539 million dollars in the year to March - but funds lost 801-million dollars over the period due to covid 19.

Authority regulation director Liam Mason says officials are monitoring whether providers are continuing to charge reasonable fees.

He says there has been movement from some providers and fees aren't going up, but they're going to need to put some pressure on the industry.