Steps to bring clarity to your future finances
Sanjib Saha
31 October 2025
In the last post, we defined Financial Clarity as knowing, with reasonable accuracy, how much we’ll have in each future years of our lives. We also saw that such projection requires estimated annual income and expense for each future year ahead.
Today, we’ll explore how to get such estimates. For that, we introduce a simple but powerful concept called Money Stream.
Think of your finances like the water in a bucket in the picture above. Your income sources are like the supply pipes pouring water in, raising the water level. Your expenses are the taps, draining water out. If the bucket never runs dry, you’re financially secure.
Each of these pipes or taps – whether pouring in or draining out – represent a unique money stream. Your financial life consists of many of such money streams – one or more income streams and several expense streams, all flowing in and out over time.
A money stream represents either an income or an expense. It has a fixed annual amount, which either keeps pace with inflation or stays constant in nominal terms. For example, property taxes increase with inflation, but the monthly P&I (Principal and Interest) of a fixed-rate mortgage don’t.
A money stream exists for a specific period. Its lifetime is defined by an optional start and optional end year. If both are missing, the money stream is current and permanent – like ongoing living costs. If only the end year is specified, it’s current but ends in a future year –like a worker’s paycheck that stops at retirement. Some money streams start in the future, and then either continue indefinitely (e.g., future social security checks) or end in a few years (e.g., future college education costs for each child). Therefore, in any given year, your financial picture is shaped by a combination of ongoing, new and expired money streams.
Each money stream is immutable, meaning that the annual amount, lifetime or inflation adjustment doesn’t change. If we expect them to, then we need to break it up into multiple money-streams to preserve immutability.
Take a typical mortgage, for example. It can have several components like mortgage insurance, P&I, property tax and homeowner insurance. Even though you pay a single total amount towards the mortgage, it represents three different money streams. The mortgage insurance ends first – so that’s a short-lived money stream. The P&I stops when the mortgage is paid off and doesn’t adjust for inflation. That’d be another money stream. The tax and insurance continue indefinitely and are expected to rise with inflation. That’d be the third money stream. By breaking them apart, you will get a more accurate picture of your housing costs.
Some examples of Income money-streams:
. Paycheck – stops at retirement year, inflation-adjusted
. Child support – stops when the child is 18, usually fixed
. Rental income – perpetual, inflation-adjusted
. Pension – starts at retirement year and continues forever, usually fixed
Expense money streams are more dynamic as they come and go. In addition to the examples below, feel free to check out a related article:
. Essential Living Cost – permanent, inflation-adjusted
. Daycare – ends when kids grow up, inflation-adjusted
. College Education – starts at college age and last for 4-6 years, inflation-adjusted
. Major House Repair/Renovation – infrequent, inflation-adjusted
. Car Replacement – every 10-15 years, inflation-adjusted
By now, you can probably see how this concept can shine light on your financial future. Your main task is to identify all your key money streams – both income and expenses, current and future – that apply to your life. Once you’ve mapped those out, projecting your lifetime finances become surprisingly manageable.
And here is the exciting part! We have built a financial model spreadsheet where you can plug in your information and instantly see the results. We’ll soon make it available to everyone, along with a video guide. Stay tuned for updates! Meanwhile, feel free to reach out via email or LinkedIn if you’d like to schedule walkthrough sessions, get a copy of the model and receive some tips on how to use it.
Needless to remind, all our resources are free with no strings attached whatsoever.