"john boyle" wrote
Exactly. But effectively, that's how the annuities are priced -- the NPV at inception of future monthly payments should equal the NPV at inception of the alternative annual payments. Apart from the effect of differences in expenses - which will be higher for the monthly-paid option (more payments made each year) - so that the NPV of monthly option will be a little less than the NPV of the annual option, making the annual option slightly better at outset (unless you know for sure when in the "annuity year" you are going to die!!).