Start with Your Hourly Rate
Your hourly rate is the foundation of every quote. This isn't what you'd like to earn—it's what you need to earn to cover wages, tools, vehicle costs, insurance, and keep the lights on at the workshop.
To calculate it, add up your annual overhead costs: vehicle fuel, insurance, equipment replacement, rent or yard space, licenses, software, and taxes. Divide that by the number of billable hours you work per year (typically 1,500–1,800 for most electricians). That's your overhead cost per hour. Add your desired profit margin on top—usually 20–40% depending on your experience and market.
Example: If your overhead is £30 per hour and you want £20 profit per hour, your base rate is £50/hour minimum.
Build in Material Markup
Never quote materials at cost. You're handling procurement, managing stock, dealing with supplier issues, and carrying the risk if something gets damaged or needs replacing mid-job.
Standard practice is a 20–40% markup on materials depending on your market and job size. Larger jobs can run lower markups; smaller jobs justify higher ones because the admin burden is the same.
Track what you actually pay suppliers, not list prices. Use that real cost as your baseline, then apply your markup consistently. Build a simple spreadsheet with common materials and their costs—cables, breakers, outlets, boxes—so you're not calculating from scratch each time.
Account for Job Complexity and Risk
Not all electrical work is equal. A straightforward socket installation in new construction is faster and more predictable than rewiring a 60-year-old Victorian terrace with undersized conduit and dodgy access.
Adjust your labor rate for complexity:
- Straightforward work (new circuits, simple upgrades): base rate
- Moderate complexity (older buildings, confined spaces, partial rewires): add 10–20%
- High complexity (asbestos concerns, full rewires, tricky access): add 30–50%
This covers the slower pace, problem-solving, and risk. It also protects you when a job takes longer than expected due to unforeseen issues—and it always does in older properties.
Get the Time Estimate Right
Your entire quote hinges on how long the job takes. Underestimate and you're working for peanuts. Overestimate and you lose the bid.
Use your own job history. Track how long similar jobs actually took, then log it. After a few months you'll spot patterns: consumer unit upgrades in terraced houses, 4-6 hours; rewiring a kitchen, 8-12 hours; new circuits with full testing, 3-4 hours each.
Build in a small buffer—5–15% depending on uncertainty. If you're quoting for a job you haven't done before, site visit and ask detailed questions: Is the building modern or historic? What's the existing wiring condition? Are there access issues? Can you work during occupied hours?
Never rely on guesses or what you think it "should" take. Use what it actually took last time.
Quote in Writing and Break Down the Estimate
Verbal quotes are forgotten or misremembered. A written estimate shows professionalism and protects you both.
Break it down clearly:
- Labor: X hours at £Y/hour = total
- Materials: itemized list with costs and markup applied
- VAT (if registered)
- Any extras or exclusions
This transparency builds trust. Customers understand what they're paying for, and you're protected if scope creeps—you can point to what was and wasn't included.
Include a validity date on the quote (typically 14 or 30 days) so you're not held to old material prices if the job gets delayed.
Adjust for Your Market and Experience
London electricians charge differently than rural areas. Experienced sparkies with a reputation can charge more than someone fresh out of apprenticeship. Know your local market—call a few competitors, check what experienced guys in your area are charging, and position yourself accordingly.
As you build a reputation and customer base, your rates will rise. Track which customers and job types are most profitable and chase more of those.
Flint handles job quoting and tracking for plumbers and electricians in seconds—try it free at ask-flint.com.