Most contractors know what a project was supposed to make when they priced it.
The more important question is:
What is it expected to make now?
Those are not always the same number.
A construction project starts changing almost as soon as work begins.
Labour productivity changes.
Material prices move.
Programmes extend.
Subcontract packages change.
Variations arise.
Unexpected costs appear.
That is why one of the most important commercial numbers in a contracting business is Forecast Final Margin.
What is Forecast Final Margin?
At its simplest:
Forecast Final Revenue – Forecast Final Cost = Forecast Final Profit
Forecast Final Profit divided by Forecast Final Revenue then gives the Forecast Final Margin percentage.
But the most important word is:
Forecast.
Rather than simply reporting what has already happened, Forecast Final Margin asks:
Based on everything we know today, where is this project expected to finish?
That changes the commercial conversation.
Historical reporting isn’t enough
Accounts are essential.
They tell management what revenue and cost has already been recorded.
But managing a live construction project also requires a forward-looking view.
If a project has already incurred £400,000 of cost, that number matters.
But management also needs to understand:
- committed costs
- outstanding costs
- costs required to complete
- forecast final revenue
- recoverable variations
- risks
- opportunities
- programme implications
Only then can the business form a realistic view of where the job is heading.
That is the difference between:
reporting the past
and:
managing the future
Forecast Final Margin should move
A forecast is not supposed to stay static.
Imagine a project starts with an expected margin of:
15%
At the next review it becomes:
13%
Then:
10%
The final percentage matters.
But the movement can be even more useful.
Why did the margin move?
Was it:
- labour overrun?
- material inflation?
- missed variation?
- programme extension?
- subcontractor performance?
- rework?
- estimating error?
- procurement issue?
Once management understands the reason, it can decide whether action is required.
A better commercial review
Rather than only looking at current cost, a useful commercial review can follow:
- Original Margin
- Previous Forecast
- Current Forecast
- Movement
- Reason
- Action
That turns a number into a management tool.
Why this changes conversations
Without Forecast Final Margin, project reviews often become dominated by:
“How much have we spent?”
With Forecast Final Margin, the conversation becomes:
“What is the job expected to make?”
“What changed?”
“Why did it change?”
“What do we need to do about it?”
Those are far more useful management questions.
Your accounts tell you what happened.
Forecast Final Margin tells you where the job is heading.
Growing contractors do not need perfect forecasts.
Forecasts will change as new information becomes available.
The objective is to make the best commercial judgement possible with the information available today and then update that judgement consistently as the project develops.
That gives management the opportunity to identify commercial issues earlier.
And the earlier an issue is visible, the more opportunity there is to do something about it.
If you cannot currently see Forecast Final Margin across every live project, that is one of the first commercial controls worth strengthening.
