BBCWatcher
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So let's look at the wealth side of the equation. Let's suppose you're age 45 today, you want to retire, and you want to support a S$6,000/month (2020 dollars) lifestyle. How much wealth would you need, today, to assure you won't outlive your savings and that you can cope with 2%/year average inflation?
Well, we have to support about S$9.37 million of total nominal spending as we've just seen. First we need a real growth assumption (an assumption about how much we can reliably grow a diminishing pile of wealth above the 2% inflation rate). So let's suppose we forecast 1.5 percentage points above inflation, i.e. 3.5% nominal. Then if we toss these figures into a retirement calculator it looks like we need about S$3 million of wealth (2020 dollars) to pull this off. In the first year (2020) our $3 million portfolio earns $105,000 nominal (3.5%), which is above the $72,000 year one draw ($6,000/month in 2020 dollars). But the draw increases by 2%/year, and eventually we start drawing from prior nominal gains. Then we eventually start drawing from principal until we've exhausted all wealth.
Well, we have to support about S$9.37 million of total nominal spending as we've just seen. First we need a real growth assumption (an assumption about how much we can reliably grow a diminishing pile of wealth above the 2% inflation rate). So let's suppose we forecast 1.5 percentage points above inflation, i.e. 3.5% nominal. Then if we toss these figures into a retirement calculator it looks like we need about S$3 million of wealth (2020 dollars) to pull this off. In the first year (2020) our $3 million portfolio earns $105,000 nominal (3.5%), which is above the $72,000 year one draw ($6,000/month in 2020 dollars). But the draw increases by 2%/year, and eventually we start drawing from prior nominal gains. Then we eventually start drawing from principal until we've exhausted all wealth.

