The 13-week cash flow as the only report that matters in turbulence
Turbulence is not a slow P&L decline. It's a sudden cash flow gap. The 13-week cash flow is the one tool that shows the gap weeks before it becomes fact.
A loss-making P&L for three quarters running is bad news. A negative cash balance next week is a catastrophe. When the market shifts to unpredictable, the only report that actually protects the business is a 13-week cash plan, refreshed weekly. Cash runs out before profit does: according to CB Insights, 70% of venture-backed startups that shut down since 2023 named running out of capital as the final reason (analysts stress it is the final cause, not the root one).
Why 13 weeks
13 weeks is a quarter. Long enough to see the inflow trend and seasonal peaks. Short enough to stay specific: each week a row, not a month as abstraction. Less than 13: you only see the next step. More than 26: the horizon is literature, not a plan. That is why the 13-week forecast became the shared language of crisis management: as Ankura writes, lenders and bankruptcy courts in the US require exactly this, together with a weekly variance report.
Structure
Inflows: by category and probability
Not «sales this week». A: confirmed invoices. B: pipeline at >70% probability. C: probable debt facility or investment tranche. Each its own row. A/B/C is not yet another forecast: it's a working estimate of receipts.
Outflows: fixed, variable, discretionary
First two are mandatory. Discretionary is what can slip 2-4 weeks. The split gives a trigger: if closing balance dips below threshold, discretionary auto-pauses without a meeting.
Closing balance: the alert
The single line that matters. If closing balance drops below operational reserve threshold (12-16 weeks of payroll + key vendors), it's not a quarterly review item, it's a trigger for next Monday.
Scenario planning: at least three
Base case: as it is now. Optimistic: best 80% pipeline + on-time AR. Pessimistic: collection lag +14 days, 20% of the pipeline falls away, a key client pauses its contract. If in the pessimistic scenario the closing balance goes negative in week 7, then in week 4 we are already starting talks with the bank, not in week 6.
Not about forecasting. About making decisions six weeks ahead of the problem.
ERP integration
A 13-week report without a daily refresh from ERP is dead paper. The data for it: AR aging (inflows), AP aging + payroll calendar (outflows), bank position (closing balance). All of it is already in the system. The consultant’s job is not to invent the data but to make it flow into one report automatically, without manual reconciliation.
What this gives the owner
Not a «forecast». Calm. The owner calls on Monday: «Are we making it through April?» The answer comes in 30 seconds, with a reference to a specific row. Not «I think so». «Closing balance for week 9: $440K, operating reserve $380K, there is margin».