Relationship to net asset value
The expense ratio is quoted as an annual rate, but in practice it is calculated on a daily basis and deducted continuously as part of the fund's net asset value calculation. Investors do not need to make a separate payment, but the cumulative impact grows larger the longer the holding period.
What to keep in mind
Index funds generally tend to have lower expense ratios, while actively managed funds tend to have higher ones. Even a small difference in the rate can affect the final amount of assets accumulated over the long term through the effect of compounding, so it is worth checking this in advance in the prospectus.
