Invoice paid on timeAbove reserve
$27,100Lowest point
0Weeks below reserve
Invoice paid six weeks lateBelow reserve
$19,700Lowest point
4Weeks below reserve
For agency owners
Cash flow forecasting for agencies
Agencies can be profitable and still run short of cash. Payroll goes out every two weeks while client invoices arrive 30, 45 or 60 days later. A weekly forecast shows where that gap bites before it does.
The agency cash gap
Where agency cash flow goes wrong
Payroll doesn't wait for clients
Salaries go out every two weeks. A $15,000 project invoice on net-30 might not land for six weeks. The forecast has to show both on the same weekly timeline.
Retainers hide project risk
Steady retainers make the average month look safe. The risk sits in the large project invoices: when one slips, the low point drops fast.
Hiring is a cash decision before it's a P&L decision
A new hire starts costing money in their first payroll. The revenue they help win shows up later. A weekly forecast shows whether the next 13 weeks can carry that gap.
Tax and annual bills cluster
Estimated taxes, insurance and software renewals often land in the same weeks as payroll. Monthly summaries smooth them out; a weekly view doesn't.
How to do it
A weekly forecast in four steps
Start from today's bank balance
Combine your operating accounts. Use the real number, not the P&L.
List money in by expected week
Retainers and open invoices, placed in the week you realistically expect payment, not the due date.
List money out by week
Payroll dates, rent, contractors, software, taxes and one-off bills.
Find the low point and test it
Move your biggest invoice a few weeks later. If the low point drops under your reserve, that's the decision to make now.
Worked example
One late invoice, four weeks below reserve
In the fictional nine-person agency used in our demo, a $15,000 invoice paid six weeks late drops the lowest balance from $27,100 to $19,700 and puts cash under a $25,000 reserve for four weeks. The quarter-end balance is the same either way. Only the timing changed.
Common questions
Why do profitable agencies run out of cash?
Because costs (mainly payroll) are paid on a fixed schedule while revenue arrives on client payment terms. One large invoice paid a few weeks late can push the bank balance below payroll even when the quarter is profitable overall.
How often should an agency update its cash forecast?
Weekly. A short Monday update — real bank balance, invoices received, dates that slipped — keeps a 13-week forecast accurate.
Should agencies forecast weekly or monthly?
Weekly for the next quarter. Monthly views hide the payroll weeks where cash is tightest. A monthly or 12-month view is still useful for longer-range planning.
What reserve should an agency keep?
There is no single right number. Many owners set a floor based on payroll, such as one or two payroll cycles, and then plan owner pay and hiring so the forecast stays above it. Talk to your accountant about what fits your business.
See your own 13 weeks
Cash Command OS Complete is a ready-to-use workbook for Excel and Google Sheets with a sample agency, decision tools and a weekly routine. $199 one-time, 30-day refund.