Many building quotes cover labour and materials but quietly leave out the costs that keep the business operating. The van still needs insurance, tools still need replacing, software still needs paying for, and time spent measuring, ordering, travelling, and administering jobs still needs to be recovered.
If overheads are not included somewhere in your pricing model, the quote may look profitable while the business is only breaking even. The goal is not to add an unexplained fee to the client document. It is to make sure the cost is present in the internal estimate before you decide on the client price.
What counts as an overhead?
Direct costs are consumed by one job: the hours worked on that site, the materials installed, a skip hired for that project, or a subcontractor engaged for that scope. Overheads support the business across many jobs.
Common overheads include vehicle finance and insurance, fuel that is not assigned to one job, tools and equipment, public and employers’ liability insurance, accounting, software, phone, office costs, training, marketing, professional fees, and the owner’s non-billable administration time.
Step 1: List the annual overhead base
Start with a realistic period, usually the last twelve months or the next trading year. Add the overheads that the business needs to operate. Use actual invoices where you have them and sensible estimates where a cost is new or changing.
Keep direct job costs out of this list. If fuel is already assigned to individual jobs, do not add it again as an overhead. The aim is to allocate the cost once, not to inflate it accidentally.
Step 2: Choose an allocation method
There are two common approaches. You can include overhead in a fully loaded hourly labour rate, or you can allocate an overhead amount or percentage to each quote. The right method depends on how consistently your team records hours and how different your job types are.
For an hourly approach, divide annual overhead by realistic annual billable hours. If annual overhead is £36,000 and the business expects 1,200 billable hours, the overhead recovery rate is £30 per billable hour. Add that to the direct labour cost before applying your target markup or margin.
For a quote-level approach, divide overhead by expected annual sales or cost, then apply the resulting rate consistently. Review the method when the team, workload, or business costs change. A percentage that worked for a sole trader may not recover the same costs after hiring staff or taking on an office.
Step 3: Check the building quote before applying margin
A complete internal cost should normally include the labour, materials, plant, subcontractors, travel, waste, allowances, and the allocated overhead relevant to the job. Only then should you choose the markup or target margin that makes the work commercially worthwhile.
Use the labour cost calculator to sense-check team hours and labour overhead, then use the markup and margin calculator to compare the client price with the cost base. These are planning tools, so review site conditions, VAT, scope, exclusions, and payment terms before sending anything.
Worked example: direct cost, overhead, markup and margin
The figures below are illustrative and exclude VAT so the relationship between cost, markup and margin stays clear. Replace every number with the real labour, material, plant, subcontractor and overhead assumptions for the job.
| Step | Illustrative amount | What it means |
|---|---|---|
| Direct job costs | £8,000 | Labour, materials, plant and subcontractors assigned to this job. |
| Allocated overhead | £1,200 | The job's share of business-running costs using the firm's chosen recovery method. |
| Internal cost base | £9,200 | Direct costs plus allocated overhead before profit. |
| 25% markup on cost | £2,300 | 25% of the £9,200 internal cost base. |
| Selling price before VAT | £11,500 | Internal cost base plus the markup. |
| Margin at that price | 20.0% | £2,300 divided by the £11,500 selling price. |
This is why markup and margin should not be treated as interchangeable. A 25% markup on a complete £9,200 cost base produces a 20% margin on the £11,500 selling price. If the target were instead a 25% margin, the pre-VAT selling price would need to be £9,200 ÷ 0.75 = £12,266.67. Neither percentage is a recommended target: the right overhead recovery and margin depend on the business, job, risk and scope.
Keep the calculation internal, then present the client with a clear scope, price and terms. For a builder-specific workflow, see CostForge for builders.
Should overheads appear as a line on the client quote?
Not necessarily. Your client needs a clear scope and a fair price, not a full view of every internal business expense. Some businesses include an “overheads and profit” line; others recover the same cost through labour rates or the overall price. Choose a presentation that is clear, consistent, and compatible with the type of client and work.
Keep the underlying calculation visible to your own team. If a client asks why the price changed, you can explain the scope, assumptions, labour, materials, and terms without guessing how the total was assembled.
Overheads are not an optional extra. They are part of the cost of delivering work as a functioning business. Allocate them deliberately, avoid double counting, and review the method when your operation changes. That gives every building quote a better chance of producing the result you intended.
