How to Analyse Gross Profit by Customer or Product
For many SMEs, understanding where profit is actually being generated is one of the most important parts of effective management reporting. Sales revenue alone rarely provides the full picture.
A customer generating high turnover may produce very little profit, while smaller customers or product groups can often deliver significantly stronger margins.
Without accurate gross profit analysis, businesses can struggle to make informed decisions around pricing, sales strategy, purchasing and customer management.
Businesses using systems such as Sage 50, Sage 200, Microsoft Dynamics 365 Business Central, SAP Business One, Xero, QuickBooks and other ERP or accounting systems often already hold all the underlying financial and sales data required for margin analysis.
The difficulty is producing clear, reliable reports that combine this information effectively.
In many SMEs, gross profit reporting still relies heavily on spreadsheets.
Finance teams export sales and cost data into Excel before manually calculating customer and product margins using formulas, pivot tables and manually maintained worksheets.
Reports often attempt to analyse:
- gross profit by customer
- margin by product or product group
- profitability trends over time
- low-margin customers
- regional profitability
- branch or departmental performance
- changes in margin against previous periods
While this approach may work initially, it often becomes increasingly difficult to maintain as reporting requirements grow.
As businesses expand, spreadsheets become larger and more complex. Additional formulas and adjustments are added over time, increasing the risk of inconsistencies and making reports more difficult to maintain.
This frequently leads to delays in management reporting and limits visibility into changing profitability trends.
One finance director explained that before working with Illuminis Insight Software, the business struggled to understand which customers and product groups were generating the strongest margins.
Although the company held large amounts of sales data within its ERP systems, producing accurate gross profit reports required significant manual effort every month.
The finance team relied heavily on spreadsheets to combine sales and cost information, and preparing reports often took several days.
After implementing Octelas by Illuminis Insight Software, the business automated its gross profit reporting process completely.
Management teams gained instant access to:
- gross profit by customer
- product and product group margin analysis
- profitability trends over time
- branch and departmental margin reporting
- low-margin customer identification
- sales versus profitability comparisons
Instead of manually preparing spreadsheets every reporting cycle, managers could instantly analyse profitability across the business using live data.
The business significantly reduced reporting time while improving visibility into where profit was actually being generated.
Another managing director described how Octelas helped the company identify several high-revenue customers that were delivering much lower margins than expected. By gaining clearer visibility into profitability, the business was able to review pricing structures and improve overall financial performance.
Many SMEs initially explore tools such as Microsoft Power BI when looking to improve profitability analysis. While dashboards can display gross profit information visually, businesses often underestimate the complexity involved in maintaining the underlying calculations, reporting logic and data structures.
In many cases, spreadsheets continue to exist behind the scenes, with finance teams still manually preparing and validating data before it reaches the dashboards.
Illuminis Insight Software provides a different approach through the Octelas business reporting platform.
Octelas is a fully managed reporting solution developed specifically for SMEs that need reliable profitability reporting without the burden of maintaining dashboards or complex spreadsheet systems internally.
Rather than simply supplying software, Illuminis Insight Software acts as a long-term reporting and data partner. Existing spreadsheets, calculations and reporting structures are reviewed, interpreted and recreated within a structured automated reporting environment tailored to how the business actually operates.
Once implemented, gross profit analysis becomes automated and continuously supported.
Reports update automatically as new transactions are recorded, allowing management teams to monitor customer and product profitability in real time.
Because Illuminis Insight Software manages the reporting environment on an ongoing basis, businesses do not need internal BI expertise or dedicated reporting specialists. Updates, changes and support are handled as part of the service.
For SMEs, analysing gross profit is not simply about producing financial reports — it is about understanding where value is created, improving commercial decisions and protecting long-term profitability.
By automating margin analysis, reducing spreadsheet dependency and delivering reliable management insight, Octelas by Illuminis Insight Software helps businesses save time, improve visibility and achieve strong long-term ROI from their reporting systems.