Nearly 80% of KiwiSaver members are reading their annual statements, but less than a quarter are checking whether they're on track for retirement.

Research by investment watchdog the Financial Markets Authority has found males over 60 are more likely to read their statements, while females in their 20s were less likely to.

For those who didn't read the statement the biggest barriers were that it was too complicated or they weren't interested in it.

The research surveyed 2000 people between May and June, with more than 1300 being KiwiSaver members.