Sales are up. Orders are coming in. The business looks busier than it was six months ago.
Yet the bank balance tells a different story.
Suppliers need paying. Salaries are due. More money is tied up in stock. Customers are taking longer to pay. And despite higher revenue, cash seems to be getting tighter.
The instinctive reaction is often to look at finance.
But the cause may have started much earlier.
Cash flow is not only a finance outcome. It is also an operational outcome.
To understand why cash is tight, it helps to stop looking only at how much the business sells and start looking at how cash moves through the business.
Revenue is an event. Cash is a journey.
Consider a simplified order:
Order → Purchase → Work → Delivery → Invoice → Collection
A sale may be recorded somewhere along this journey.
Cash, however, has to travel through the whole system.
The business may purchase material before receiving payment.
Work may sit unfinished.
Completed orders may wait for dispatch.
Delivery may happen but invoicing may wait.
An invoice may be raised but remain unpaid.
Every delay can increase the amount of cash the business needs to keep operating.
That is why a growing business can become more cash constrained, not less.
Where can the cash get trapped?
There is rarely one universal answer.
For one business, inventory is the problem. For another, billing approvals. For another, customers are simply paying too slowly.
Here are several places I would investigate.
1. Inventory is growing faster than sales
Growth often requires more material.
But purchasing decisions may be based on minimum order quantities, forecasts, safety stock, supplier lead times or old planning assumptions.
The result can be shelves full of material that has already consumed cash but has not yet produced revenue.
The question is not simply:
“How much inventory do we have?”
A better question is:
“How long does cash remain in inventory before that material contributes to something we can invoice?”
That changes the investigation.
2. Work is spending too long between stages
A job may require only a few hours or days of actual work while spending considerably longer waiting.
Waiting for information.
Waiting for approval.
Waiting for another department.
Waiting for material.
Waiting for capacity.
Waiting for a customer decision.
Those queues matter financially.
Cash may already have gone out for material, labour and overhead while nothing can yet be billed.
So when reviewing working capital, I would want to distinguish work time from wait time.
A process can look productive while cash quietly sits inside it.
3. Finished work is not becoming an invoice quickly enough
This is an easy gap to overlook.
Ask:
When does the business become entitled to invoice, and when does the invoice actually go out?
If completed work waits two days for documentation, three days for an approval and another two days for someone to prepare the invoice, that is a week added to the cash cycle before the customer has even started their payment clock.
Improving collections cannot recover time lost before the invoice existed.
4. Billing depends on information arriving correctly
Sometimes the problem labelled “slow billing” is not really a billing problem.
Invoices may require:
- proof of delivery
- timesheets
- completion certificates
- purchase-order references
- customer acceptance
- milestone confirmation
- supporting documentation
If this information is incomplete or arrives through disconnected channels, Finance becomes the final place where an upstream process failure becomes visible.
Chasing Finance to invoice faster does not fix that.
The question becomes:
What must be true for an invoice to be raised immediately, and where does that condition fail?
5. Collections are slow, but not all slow collections have the same cause
A high receivables balance deserves attention.
But “customers pay late” is still only a symptom.
Some customers may genuinely have long payment behaviour.
Others may be paying late because invoices are incorrect, disputed, sent to the wrong person, missing documentation or raised later than expected.
Those causes require very different responses.
Before tightening collection routines, segment the delay.
What proportion is customer behaviour, and what proportion is something the business itself could prevent?
That distinction matters.
Why growing sales can make the problem worse
Imagine sales increase by 25%.
That sounds positive.
But suppose the business must buy material several weeks before delivery, production takes longer as volumes increase, finished orders occasionally wait for dispatch, invoices are raised several days after completion and customers pay 45–60 days later.
More sales now mean more cash travelling through that system.
If the cycle is inefficient, growth does not remove the inefficiency.
It funds more of it.
The faster the business grows, the more working capital the same operating model may require.
This is why the question should not only be:
“How do we increase cash?”
It should also be:
“Where is the business consuming, delaying or trapping cash unnecessarily?”
Follow the money backwards
When cash feels tight, I like to trace the pressure backwards through the operation.
Start with collection.
Collection: When did the customer actually pay?
Then move backwards.
Invoice: When was the invoice raised? Could it have been raised earlier?
Delivery: When was the product or service completed and delivered? Was anything waiting?
Work: How long did the work actually take, and how long did it spend waiting?
Purchase: When did we commit cash to material, suppliers or external services?
Order: What did we promise, and what information was available when we made that commitment?
Now compare two things:
When cash leaves the business versus when cash returns.
The distance between them is where the investigation becomes interesting.
Don't start with the solution
Suppose we discover that cash is tied up for too long.
It is tempting to jump immediately to automation, a new ERP module, tighter credit control or another dashboard.
I wouldn't.
First:
Observe.
Follow actual orders, invoices and payments rather than relying only on how the process is supposed to work.
Connect.
Link the financial symptom to possible operational causes.
Prove.
Test those explanations against real transactions.
Quantify.
Estimate how often the problem occurs and how much cash or time it affects.
Decide.
Then determine whether changing it is worthwhile.
The answer may be technology.
But it may equally be a simpler approval, clearer ownership, a purchasing rule, better information at hand-offs, different billing controls or a change in how customer terms are managed.
A simple exercise you can do
Take 10 recent orders.
Not averages. Actual orders.
For each one, capture:
Order received → Material committed → Work started → Work completed → Delivered → Invoice raised → Payment received
Then record the time between each event.
Look for three things:
1. Where is the longest wait?
2. Which waits repeat across multiple orders?
3. Which waits are within your control?
You may discover that the largest opportunity is not where you expected it.
Perhaps collections are 45 days, but that is exactly what customers were promised.
Meanwhile invoices routinely leave five days after delivery.
Or inventory is high because material is purchased much earlier than production actually needs it.
Or completed work waits for customer acceptance because readiness was never confirmed beforehand.
Those are very different problems.
And therefore they need very different solutions.
The number I would want to understand
Rather than looking only at revenue growth or total receivables, ask:
How many days pass between cash being committed to an order and cash returning from that order?
Then ask:
How much of that time genuinely creates value, and how much is avoidable waiting?
That is a much more useful conversation.
Because improving cash flow does not always require selling more, borrowing more or pushing customers harder.
Sometimes it means helping the cash you have already earned move through the business faster.
And the place where cash feels trapped may not be the place where the problem began.