The 13-Week Cash Flow Forecast: See Your Cash Coming Instead of Enduring It
A 13-week cash flow forecast shows you, week by week, the money coming in and going out over the next 90 days, so you see a cash gap coming before it lands on you. If you look at your bank account without really knowing whether you can make payroll in two months, it is not that things are going badly: it is that you cannot see far enough ahead.
- The 13-week forecast covers a quarter, week by week. It is the most useful horizon for an owner: short enough to be accurate, long enough to react in time.
- It is not about predicting the future. It is about seeing cash gaps early enough to act, instead of enduring them.
- It is a rolling tool: each week you move forward one week. The longer you keep it, the more accurate it becomes.
A 13-week cash flow forecast is a rolling, week-by-week view of the money coming in and going out of your business over the next quarter. It starts from your real bank balance and projects, each week, what it becomes once collections arrive and payments leave. It is not an annual budget or an accounting projection: it is a short-term liquidity steering instrument.
Thirteen weeks is one quarter. The monthly view hides gaps inside the month: you can end the month positive and run short in the third week, when payroll meets a tax installment. The annual view is too coarse and too uncertain to decide anything today. Thirteen weeks, weekly, is the balance point: fine enough to see payment collisions, long enough to have time to act, negotiate a line of credit, delay a purchase, or accelerate a collection.
Six steps are enough for a first useful version.
- Start from today's real bank balance. Not the accounting balance, the actual available cash.
- List the inflows by week. Expected client collections, placed by your real payment terms, not by invoice date.
- List the outflows by week. Payroll, suppliers, rent, taxes, loan repayments, draws.
- Calculate the end-of-week balance. Week after week, carrying each week's balance into the next.
- Flag the weeks below your safety threshold. Those are the tension points to handle in advance.
- Update every week. You roll forward one week and add a new 13th week. That is what makes the tool reliable.
Profit and cash do not follow the same calendar. You can be profitable on paper and short on cash in reality, because your clients pay in 30 or 60 days while payroll comes every two weeks. The 13-week forecast shows that gap, where the P&L hides it.
A profitable 5 million dollar business in Kamloops nearly missed payroll one June: three large invoices due in 60 days fell after payroll and a tax installment. On the P&L, everything looked fine. A 13-week forecast would have seen it coming six weeks ahead, early enough to shift a payment or draw on a line.
The 13-week forecast is the core of the cash dimension of the Sentinel Mandate. We build it with you, identify the three main levers of your cash, and stress-test your business against a 20 percent revenue shock. You then know not only where you are heading, but what happens if a big client slows down. And you leave with a parameterizable dashboard your finance function keeps using.
This speaks to owners steering blind:
- You run an SME generating between one and twenty million dollars in revenue.
- You cannot see your cash clearly beyond a few weeks.
- You have been surprised before by a cash gap you did not see coming.
You do not need to be a finance expert to use it. The forecast gives your bookkeeper and you a shared instrument, and it is also the most credible thing you can put in front of a lender. The call to discuss it is 30 minutes, no cost, no obligation.
What is a 13-week cash flow forecast?
It is a rolling, week-by-week view of the money coming in and going out of your business over the next quarter. It starts from your real bank balance and projects its path, to show you a cash gap before it arrives.
Why 13 weeks rather than an annual budget?
Because thirteen weeks, a quarter shown weekly, is accurate enough to see payment collisions and long enough to react. An annual budget is too coarse and too uncertain to decide today, and a monthly view hides the gaps inside the month.
Can you be profitable and short on cash?
Yes, and it is common. Profit and cash do not follow the same calendar: your clients pay in 30 or 60 days while your costs go out continuously. The 13-week forecast shows that gap, which the P&L does not reveal.
How often should it be updated?
Every week. You roll forward one week and add a new thirteenth week. That regular update is what turns an estimate into a reliable tool.
Need a structured outside read?
A 30-minute discovery call lets us evaluate whether your situation fits the Sentinel Mandate methodology.