How to Build a Rolling Cash Flow Forecast
Knowing where your business stands today is important.
Knowing where it will stand in 30, 60 or 90 days is even more valuable.
A rolling cash flow forecast gives Finance Directors and business owners the confidence to make informed decisions before cash flow becomes a problem.
Should you recruit another employee?
Can you afford to invest in new machinery?
Is now the right time to purchase additional stock?
Do you need to speak to your bank before cash becomes tight?
Without an accurate forecast, those decisions are often based on guesswork.
Why Cash Flow Forecasting Is So Difficult
Most SMEs already have the information needed to forecast cash flow.
The problem is that it’s spread across multiple systems.
Outstanding sales invoices.
Purchase invoices.
Recurring costs.
Payroll.
VAT.
Loan repayments.
Expected customer payments.
Future purchasing commitments.
Trying to combine all of this information manually is incredibly time-consuming.
Which is why many finance teams rely on spreadsheets.
The Spreadsheet That Nobody Wants to Own
We’ve seen businesses with cash flow forecasting spreadsheets containing dozens of worksheets, thousands of formulas and years of modifications.
Every month someone updates the workbook.
Checks the formulas.
Imports the latest data.
Adjusts assumptions.
Corrects broken links.
Then emails the latest version to the directors.
Nobody wants to change it.
Nobody wants to be responsible for it.
One Finance Manager summed it up perfectly:
“The spreadsheet had become so complicated that only one person in the business really understood how it worked.”
That’s a risk no finance team should have to live with.
A Real Customer Story
A manufacturing company approached Illuminis Insight Software because producing a rolling cash flow forecast took nearly two days every month.
Information was being exported from Sage 200, copied into several Excel workbooks and manually adjusted before the directors received a report.
By the time it reached the board meeting, parts of it were already out of date.
Rather than asking the customer to change how they worked, we spent time understanding exactly how their finance team built the forecast.
We analysed every spreadsheet.
Understood every calculation.
Reviewed how expected payments were estimated.
Then recreated the entire process inside Octelas.
The result was a live rolling cash flow forecast that updated automatically as new transactions entered the ERP system.
The Finance Director later told us:
“It’s like having another member of the finance team. We spend our time discussing the forecast instead of building it.”
Another Customer Avoided a Cash Flow Problem
A wholesale distributor wanted better visibility of future cash requirements.
Historically, they reviewed cash flow once a month.
After implementing Octelas, they could see projected cash balances weeks in advance.
When one of their largest customers unexpectedly delayed payment, the forecast immediately highlighted the impact.
Instead of reacting when the bank balance became tight, management adjusted purchasing plans and spoke with suppliers well in advance.
The Managing Director later commented:
“Before Octelas we found problems after they happened. Now we see them coming.”
That visibility allowed the business to avoid unnecessary borrowing and make better commercial decisions.
Rolling Forecasts Should Work the Way You Work
Every business forecasts differently.
Some work 13 weeks ahead.
Others forecast monthly.
Some include confirmed purchase orders.
Others model best-case and worst-case scenarios.
Some include payroll, VAT and corporation tax.
Others prefer a high-level executive overview.
That’s why Illuminis Insight Software doesn’t offer a standard cash flow forecasting template.
We start by understanding your business.
We review the spreadsheets your finance team already trusts.
We understand the calculations.
Then we recreate the forecasting process inside Octelas.
The reports remain familiar—but the manual work disappears.
Why Dashboards Alone Aren’t Enough
Many businesses looking to improve forecasting also investigate Microsoft Power BI.
Power BI is an excellent visualisation platform.
But a rolling cash flow forecast is much more than a dashboard.
Someone still needs to understand your forecasting process.
Build the calculations.
Maintain the business rules.
Support the finance team.
Update reports as the business changes.
Without a long-term reporting partner, many organisations end up relying on external consultants every time something needs updating.
We Become Part of Your Finance Team
This is where Illuminis Insight Software is different.
We don’t simply implement reporting software.
We become your long-term reporting and data partner.
We learn how your finance team works.
We recreate your existing reports and forecasts.
We automate repetitive reporting.
And we continue improving your reporting as your business grows.
Need to extend your forecast from 30 days to 90 days?
We’ll configure it.
Need to include payroll or banking data?
We’ll integrate it.
Need to compare forecasts against actual performance?
We’ll build it.
Need a new report for your next board meeting?
We’ll create it.
When your reporting requirements change, you don’t need to start another project—you simply call us.
Plan Ahead With Confidence
The best financial decisions are made before problems arise.
A rolling cash flow forecast gives you the confidence to invest, recruit, purchase and grow, knowing exactly where your business is heading.
Octelas, developed by Illuminis Insight Software, automatically combines data from Sage, Microsoft Dynamics, Xero, Exchequer, Pegasus Opera, SAP Business One, Brightpearl and many other ERP systems to create live rolling cash flow forecasts tailored to the way your business operates.
Instead of spending days updating spreadsheets every month, your finance team gains accurate, up-to-date forecasts that help reduce risk, improve planning and support better business decisions.
That’s why businesses across manufacturing, wholesale, distribution, engineering, construction, hospitality and professional services choose Illuminis Insight Software as their trusted reporting and data partner—because great forecasting isn’t about building spreadsheets, it’s about giving businesses the confidence to plan for the future.