How to forecast your personal cash flow 90 days ahead
A personal cash flow forecast projects your balance forward by replaying every known inflow and outflow on the day it will happen. Ninety days is long enough to catch quarterly bills and short enough to stay accurate. The point is not the final number but the low point in between.
What goes into the forecast
- Today's spendable cash, the starting line.
- Recurring income on its real dates: salary, retainers, benefits.
- Recurring bills on their due days: rent, utilities, subscriptions, loan payments.
- Scheduled one-offs you already know about: a flight, a deposit, an insurance renewal.
- Money you are owed with a firm date. Uncertain money stays out.
The method, step by step
- Write down today's cash on hand.
- List every recurring rule with its next date and amount.
- Walk forward one day at a time, adding inflows and subtracting outflows on their dates.
- Record the balance at the end of each day for 90 days.
- Find the lowest balance and the date it happens. That is your pinch point.
Variable spending such as groceries is deliberately left out of the replay, because it is what you control. The forecast shows what happens if you do nothing but pay the bills; your discretionary spending has to fit inside the low point.
Reading the result
Three numbers matter. The balance in 30, 60, and 90 days tells you the trend. The low point tells you how much discretionary room you really have between now and then. The first day below zero, if there is one, is a deadline for action, not a surprise waiting to happen.
Testing decisions before you make them
Once the baseline exists, layer hypotheticals onto it. A new $80 monthly bill, a $1,200 purchase next week, a raise starting in November: each shifts the low point and the 90-day balance. Comparing the two lines is far more useful than debating the purchase in the abstract.
How Worth Clarity does it
The cash flow page replays your active recurring rules and future-dated transactions on top of today's available figure, marks the projected low point, warns on the first day below zero or below your own alert level, and includes pending payouts with dates. The what-if simulator runs entirely in the browser, so you can test a purchase or a raise without saving anything.
Common questions
- Why 90 days and not a year?
- Ninety days covers a full quarter, so quarterly bills and three pay cycles appear, while the inputs are still things you actually know. Beyond that, the forecast starts depending on guesses about income and prices, which makes it look precise while being wrong.
- How do I handle a bill I pay by hand?
- Treat it as due on its usual day. In Worth Clarity, manual bills are rules marked ask before logging; the forecast assumes an overdue one is paid tomorrow so it never quietly disappears from the projection.
- What about money I expect but is not guaranteed?
- Leave it out. A forecast that includes hopeful income tells you what you want to hear. Add it as a what-if scenario instead, so you can see both versions.
