Profitability by business activity: where should you commit resources?
Separate variable costs, costs specific to each activity and shared overheads. A loss after allocating overheads does not automatically justify closing an activity. The decision depends on genuinely avoidable costs and resources that can be reassigned.
Revenue is growing, but you cannot see which offer generates the profit. A company average can hide an activity supporting the others or a profitable offer that consumes cash as it grows. This approach suits SMEs and startups with several offers, channels or operating teams.
Choose a split that matches the decision
Use categories that can be maintained every month: product line, service, channel or operating unit. Avoid combining every dimension at once. The first split should answer a real decision, such as assigning a team, adjusting a price or replacing equipment.
Build three levels of contribution
- Contribution: net sales less variable costs for the activity.
- Contribution after specific expenses: deduct activity specific costs and identify which could disappear and when.
- Profit after shared overheads: allocate shared costs using an explicit rule and reconcile the combined result to the income statement.
Revenue is not always an appropriate allocation basis. One activity may use more space, support or management time. Show the rule and its effect rather than treating a convention as economic fact.
Fictional example: an apparent loss can mislead
Entirely fictional monthly model, excluding financing and tax. Activity A has €100,000 of sales and €60,000 of variable costs, contributing €40,000. Specific expenses of €15,000 leave €25,000. B has €50,000 of sales, €20,000 of variable costs and €10,000 of specific expenses, leaving €20,000.
Shared overheads total €30,000. If an allocation assigns €5,000 to A and €25,000 to B, the reported results are €20,000 and a €5,000 loss. Yet if B closes and only its variable and specific expenses disappear, shared overheads remain €30,000. Total profit falls from €15,000 to a €5,000 loss. Allocation alone cannot determine the decision.
Compare capacity and cash as well
Add scarce team hours, investment requirements, inventory and collection terms. An attractive margin may require a team that is already fully booked or a substantial supplier deposit. Compare achievable additional contribution with the cash that must be committed.
Test before rolling out
Document price, volume, capacity and avoidable cost assumptions. Compare a central and downside scenario, then review actual differences each month. Separate market, pricing, sales mix and cost effects.
For individual contracts, see customer profitability. For development decisions, see financing profitable growth. Our fictional monthly report illustrates the regular financial review Mercova builds with business owners.
Frequently asked questions
How does margin differ from activity profitability?
Margin measures a defined level of contribution. Assessing an activity also requires specific expenses, shared costs, capacity and the capital committed.
Do we need complex software?
Not necessarily. Start with accounting records, invoicing and simple documented rules. Reconciliation matters more than the number of charts.
Which changes would improve your profitability?
See how to compare pricing, costs and volume before deciding where to act.
Find ways to improve profitability