KiwiSaver investment returns and withdrawals - including those for significant financial hardship and buying first homes - reached all-time highs in the past year.
Investment returns doubled to $3 billion but the Financial Markets Authority's (FMA) warns that investors can't expect the same performance in the current year.
The FMA latest report into KiwiSaver activity shows the pool of retirement savings is up 33 per cent, to just under $28.5 billion. This is similar to last year's growth and KiwiSaver funds now represent a significant portion of the nation's wealth, equal to 12 per cent of gross domestic product.
The report is based on the statistical returns of all scheme providers and shows that investment returns doubled from $1.5 billion last year to $3 billion in the past year to June 30.
KiwiSaver withdrawals also increased significantly when compared to previous years. Withdrawals for first home buyers were up 26 per cent from $169 million in 2014 to $214 million this year. Withdrawals for significant financial hardship were up nearly 40 per cent to $43 million.