Here are some recipes to get a rough idea,
quickly ...
Warning: these are techniques to mentally
juggle and give you food for thought. You should not base
your total plan of action on such approximations.
1. Estimate the income you want for your
retirement
To quickly calculate your salary just
before retirement, use the rule of 72.
Example. If you retire in 30 years and
you think inflation averaged 3% during these 30 years. 72
divided by 3 gives you 27.43. This means that you will get a
salary twice as high today in 27.43 years for the same
purchasing power.
2. Estimate the capital required to start
your retirement
Assuming you will have a retirement life
of between
20 and 35.
Your investments will bring you 5% more
than inflation during your retirement.
Here is the table very approximate figure
to help you secure capital required:
Use 70% of salary in advance,
calculated in the previous step, if you
consider that some expenses are no longer required and that
the government will pay even a minimum level of retirement
benefits.
Use at least 125%
if you evaluate what can be your career
path again and that the level of life you want to have when
you approach retirement may be greater than you are now
considering.
3. Estimate the future value of your
investments
Use the Rule of 72 to quickly calculate
how long your investments will double.
You divide 72 by the return of your
investment to find the number of years. Example: An
investment to 5% double in 14.4 years (72 divided by 5).
Subtract the future value of your
investments to get an idea of your capital to spare. If the
future value of your investment is more or less 10% of
capital required, do not substract, consider it as your
margin of error of calculation.
4. Estimate savings "gross" to achieve
You have 20 to 35 years to save.
Your investments will bring you 5% more
than inflation and tax-free.
Here is another very rough table to help
you quickly figure your savings needs.