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A Weekly Cash-Gap Check Any Owner Can Run by Hand
“Cash is tight this month” is a feeling, not a diagnosis — and if your only view arrives once a month, when the books close, the report may describe a month that is already over. A weekly check, done by hand in a few minutes, catches the same pattern while there is still time to do something about it. Here is a three-number version any owner can run every Friday, with nothing but their own records.
By the Lumina Business Advisory team · Updated
Why monthly is too slow for this particular problem
Free self-check · two taps · no email
Hand-off 6 of 6 · Payment → Margin
Choose the answer that sounds like your business.
That was one of six hand-offs where money changes hands, from first inquiry to collected cash. The other five take about three minutes and end in a dated sheet that names where to start.
A monthly close is built for accuracy, not speed — it is the right tool for tax filings and financial statements, and the wrong tool for catching a cash gap while it is still small. By the time a month-end report shows a growing pile of unbilled work or a slipping collection rate, four or five weeks of the pattern have already happened, and whatever caused it has had a month to become a habit instead of a one-off. The strain itself is common: in the Federal Reserve Banks’ 2024 Small Business Credit Survey, 51 percent of small employer firms cited uneven cash flows as a financial challenge (fedsmallbusiness.org).
A weekly check trades precision for speed on purpose. It will not match your accountant’s numbers to the penny, and it does not need to — it needs to answer one question every Friday: is the gap between finished work and collected cash getting better, worse, or holding steady? That is a trend question, and trend questions need frequent, rough measurements far more than they need occasional, perfect ones.
The three numbers, and where each one comes from
Together the three checks below take a few minutes once you know where to look, and each one answers a different part of the cash-gap question — where money gets stuck, not just how much is stuck.
- Jobs ready to invoice, right now. Count how many finished jobs from this week still have no invoice out. This is the piece of the cash gap that is entirely inside your own walls — no client, no terms, no collections involved. A number that holds at zero most Fridays means your own paperwork pipeline is clean; a number that keeps a running balance means work is finishing faster than it is being billed, which is the cheapest gap on this list to close.
- Invoices that came due this week, and how many of those actually got collected. This is the client-facing half — not your total accounts receivable, just this week’s invoices against this week’s collections, so the two numbers describe the same slice of time. A widening gap here, week over week, is the earliest signal that a payment pattern is drifting, long before it shows up as a large number on a monthly aging report.
- The single oldest past-due invoice, and how many days overdue it is. One number instead of a whole aging report. When this number holds steady or shrinks, collections is a routine you are running. When it grows every week, collections has quietly stopped being a process and become a hope — and it is far easier to notice that shift one week at a time than to notice it once a quarter.
These three checks are three of the six rows on this site’s printable Friday Ledger — the invoice, cash, and oldest-past-due rows specifically. The other three track the earlier stages of the same conveyor: inquiries, quotes, and unwritten scope changes — the leaks that eventually turn into the cash gap these three numbers measure.
How to actually run it, start to finish
Print a stack of the Friday Ledger, or rule three columns on a legal pad if you would rather build your own. Either way, the habit matters more than the format: same time, same day, ideally the last few minutes before you leave for the weekend, so it becomes a closing ritual rather than one more task competing with everything else on a Friday.
Fill in the three numbers from memory and a quick look at your invoicing system — do not go pull a formal report; the whole point is that this takes minutes, not an afternoon. Write the date on the sheet. Keep the sheets in order, whether that is a binder, a clipboard, or a folder of scanned pages — a single week tells you almost nothing; a month of consistent Fridays tells you the trend, and the trend is the actual finding.
Doing it by hand rather than through a dashboard is a deliberate choice, not a limitation. A dashboard update can be glanced at and forgotten in the same motion; writing three numbers down, by hand, forces a few seconds of actual attention each time — long enough to notice when the oldest past-due invoice is the same one as last week, which is exactly the kind of thing a glance at a screen slides right past.
After four or five sheets, lay them side by side. Is the unbilled-jobs count trending toward zero or growing? Is the collected-versus-due ratio holding or slipping? Is the oldest-past-due number the same stubborn invoice every week, or a fresh one each time? Those three questions, answered from a month of short Friday checks, usually tell an owner more about their actual cash position than a single detailed report ever does.
What to do when a number starts moving the wrong way
A rising unbilled-jobs count often traces to a missing owner — nobody specific is responsible for turning a finished job into an invoice the same day, so it waits for whoever gets to it. Naming one person, with standing authority to chase the paperwork, closes this gap faster than any software change.
A widening due-versus-collected gap is worth a closer look at which invoices are slipping — concentrated in a few clients, or spread evenly. A concentrated pattern is a specific conversation; a spread pattern often points back at unclear invoices or a payment-run mismatch rather than any one client being difficult.
A growing oldest-past-due number, especially the same invoice appearing week after week, is the clearest signal on the sheet that a single account needs a direct, specific conversation rather than another polite reminder — the ledger’s job is to make that invoice impossible to quietly forget about.
Put a dollar figure on what the trend is worth
The weekly sheet shows direction — better, worse, or steady. For an actual dollar estimate of what your current cash gap is costing in tied-up cash, the free Cash Gap Calculator takes the same kind of numbers and draws your cycle to scale in under a minute.
If a month of Friday sheets turns up a real, persistent gap, The Revenue Review reads twelve months of your own invoicing and payment records and prices exactly where the days go, ending in a 90-day fix list in priority order. Fixed fee $4,500, two weeks — or start with the free Ledger and calculator, no cost either way, to find out first whether it is worth the conversation.
Before any next step
What should you do next?
- Fix it yourselves.
- If the cause is clear, it lives inside one process, and one person can own it — take the play from this page and run it. That outcome is fine with us; it is why the play is published in full.
- Order one bounded build.
- If the fix is known but needs configuration or integration inside your stack — a cadence wired into your own system, an alert, a handoff — scope that one build, with us or with anyone you trust. The six systems we build show what bounded looks like.
- Start with the Review.
- If the causes are debatable, the problem crosses departments or systems, or the economics are unclear — diagnose before anyone builds. The Revenue Review: $4,500 fixed, two weeks, computed from your own records. Read a sample finding before you decide — free, no email.
Asked right after
- How long does the weekly cash-gap check actually take?
- About two to four minutes once you know where the three numbers live in your own invoicing system — unbilled finished jobs, this week’s due-versus-collected invoices, and the age of the single oldest past-due invoice. It is deliberately rough and fast rather than precise; the trend across several weeks is the actual finding, not any single Friday’s numbers.
- Do I need accounting software to run this, or can it really be done by hand?
- It can be done entirely by hand, on a printed sheet or a legal pad — that is the point of the Friday Ledger this check is built from. Software makes pulling the three numbers faster, but the habit itself does not depend on any particular tool, which is exactly why an owner who does not trust their own reporting yet can still start running it this week.
Keep reading
Where this shows up
Sources
- 2025 Report on Employer Firms: Findings from the 2024 Small Business Credit Survey · Federal Reserve Banks, 2025
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