The three variables that decide everything

Behind every retirement simulation there are only three parameters that really matter:

The target is always the same: 25 times your annual expenses (the 4% rule). With $50,000 of annual expenses, you are aiming at $1,250,000. The rest is arithmetic.

The effect of your savings rate — the most powerful variable

Market returns are outside your control. Your savings rate is entirely within it. And it is the savings rate that determines most of your retirement date.

~40 years
if you save 10% of your income
~30 years
if you save 25% of your income
~17 years
if you save 50% of your income

These figures assume a 5% real return per year (after inflation) and start from zero. If you already have starting capital, the date moves significantly closer.

Concrete scenarios: $500 vs $1,000 vs $2,000/month

Monthly savings Capital after 20 years Capital after 30 years Possible annual income (4%)
$500/month~$205,000~$470,000~$19,000/yr
$1,000/month~$410,000~$940,000~$38,000/yr
$2,000/month~$820,000~$1,880,000~$75,000/yr
$3,000/month~$1,230,000~$2,820,000~$113,000/yr

These projections assume a 7% nominal annual return (~5% real after 2% inflation), in line with historical averages for Canadian and U.S. equity markets.

The realistic return: 5% real, not 10%

Equity markets have delivered ~10% nominal return a year on average over 100 years in the United States. But that figure spans very different decades, and it ignores inflation. A prudent and realistic assumption for a diversified portfolio (a global ETF):

Use 5% real for your projections. It is more prudent than 7% nominal, and it avoids the unpleasant surprise of watching your purchasing power stagnate despite a fine nominal performance. Inflation quietly eats your returns.

Do not forget QPP and OAS

Unlike Americans, who only have Social Security, Canadians benefit from two public safety nets:

A couple can count on $40,000 to $50,000 a year in combined benefits at 65. Build that income into your simulation — it considerably reduces the capital you have to accumulate yourself.

The real question: your expenses in retirement

Most planning errors come from a poor estimate of future expenses. Key points to build in:

Retirement is not a fixed number. It is a life project you refine as you go.