Educational costing example
Bathroom Extractor Fan Replacement — Worked Job Estimate
A transparent example for UK electricians, handymen and small electrical contractors showing how a small job can be costed before customer paperwork is prepared.
1. Job summary
Replace an existing bathroom extractor fan, confirm isolation, remove the old unit, fit a suitable replacement, test operation and leave the work area tidy. This short scope is illustrative and does not cover every legal, technical, inspection or certification requirement.
2. Sample cost inputs
| Input | Example assumption | Value |
|---|---|---|
| Labour | 2.5 hours at £45/hour | £112.50 |
| Call-out / travel | Local journey allowance | £20.00 |
| Extractor fan | Example supplier price | £68.00 |
| Isolator, fixings and consumables | Small materials allowance | £12.50 |
| Parking | Where chargeable | £6.00 |
| Disposal | Old unit allowance | £4.00 |
| Overhead allowance | 10% of direct subtotal | £22.30 |
| Margin allowance | 20% markup on cost base | £49.06 |
| VAT status | Example VAT-registered business | 20% |
| Deposit requirement | 30% of VAT-inclusive total | £105.97 |
3. Worked calculation
The “margin allowance” here is explicitly calculated as a 20% markup on the cost base; businesses may define and calculate margin differently. The result is not a recommended universal selling price.
4. What can go wrong
- Forgetting travel or parking.
- Missing fixings and consumables.
- Underestimating labour or access time.
- Ignoring business overhead.
- Forgetting a profit allowance.
- Using unclear VAT treatment.
- Leaving deposit terms ambiguous.
- Creating paperwork from incomplete figures.
5. Cloudfyre workflow
- 1Use the free calculator
- 2Check labour, materials, margin, VAT and deposit
- 3Create an estimate or quotation when ready
- 4Convert job information into invoices, reports or follow-ups where supported
Document credit use depends on the document type shown inside Cloudfyre.
6. Static example paperwork preview
Illustrative only; this is not connected to Cloudfyre’s production document generator.
Example quotation
Bathroom extractor fan replacement
Total: £353.23
- Customer scope
- Replace existing fan, test operation and tidy work area.
- Labour
- 2.5 hours (example)
- Materials
- Fan, isolator, fixings and consumables.
- Exclusions
- Unexpected wiring, ducting, access or remedial work.
- VAT status
- Includes example VAT at 20%.
- Deposit terms
- Example 30% deposit: £105.97.
- Validity period
- Example: 14 days, subject to availability.
Calculate your own job
The calculator requires a free account. Register without a card, use your own figures, and decide whether customer-ready paperwork is useful.