Free trade business growth calculator
How many leads do you actually need?
Work backwards from your revenue target to calculate the extra jobs, qualified enquiries and marketing budget your trade or service business needs—before you spend more money chasing leads.
Calculate your numbersYour growth numbers
Turn a revenue goal into a practical lead target.
Use realistic monthly figures. A qualified enquiry means a genuine potential customer for work you provide in an area you cover—not every call, spam form or unsuitable price shopper.
Your monthly growth plan
Your capacity and proposed budget are sufficient at the figures entered.
What better conversion changes
This is a planning tool, not a financial forecast. Results depend on the accuracy of your inputs and do not include VAT, fixed overheads, tax, repeat business, refunds, bad debt or differences between lead sources.
Why the calculation matters
“We need more leads” is not yet a marketing plan.
A revenue target becomes useful only when it is connected to the number of jobs required, the percentage of enquiries you normally win and the amount you can sensibly pay to acquire a customer.
Without those connections, a business can buy more traffic and still miss its target. Enquiries may be unsuitable. Quotes may not be followed up. Prices may leave too little margin. Or the diary may already be too full to deliver the additional work properly.
The purpose of this calculator is not to produce a seductive return-on-investment promise. It is to expose the assumptions behind the goal so you can decide what needs to improve first.
Four possible constraints
Your result may show that leads are not the real problem.
Visibility
The numbers work, capacity exists and conversion is sound—but too few suitable customers are finding the business.
Conversion
Enquiries arrive, but too few become paying jobs. Response speed, trust, quoting, follow-up or lead quality may need attention.
Economics
The cost of acquiring work is too close to the gross profit it creates. Pricing, job selection, margin or customer value must improve.
Capacity
The business cannot deliver enough additional work without longer delays, weaker quality or even greater pressure on the owner.
The calculations
How the trade lead calculator works
The tool works backwards from the commercial result you want. It does not use invented “industry averages” or assume that every trade business converts enquiries in the same way.
1. Jobs required
The additional revenue target is divided by your average completed job value.
(target revenue − current revenue) ÷ average job value2. Leads required
The number of jobs is divided by your actual qualified-enquiry conversion rate.
extra jobs ÷ conversion rate3. Budget required
The lead target is multiplied by the expected cost of acquiring each qualified enquiry.
qualified enquiries × cost per enquiryWorked example
A trade business targeting an extra £6,000 a month
This example shows why a revenue goal alone tells you very little about the marketing required.
- Current monthly revenue£12,000
- Target monthly revenue£18,000
- Average job value£600
- Gross margin55%
- Enquiry conversion40%
- Cost per qualified enquiry£35
At £35 per qualified enquiry, the estimated acquisition budget is £875 per month. Those ten jobs create £6,000 in revenue and £3,300 in gross profit before the marketing cost, fixed overheads and tax.
If conversion improved from 40% to 50%, the same ten jobs would require approximately 20 enquiries instead of 25. At the same lead cost, the estimated budget falls from £875 to £700.
That £175 difference is why improving the customer journey can sometimes be a better first investment than simply buying more enquiries.
Use better inputs
The answer is only as honest as the numbers you enter.
Use average completed job value
Do not use your largest recent invoice. Divide revenue from completed jobs by the number of jobs completed over a representative period. If your services vary dramatically, calculate each service separately.
Measure qualified enquiries
Exclude spam, recruitment calls, suppliers, work outside your service area and requests for services you do not provide. Marketing decisions become unreliable when every phone call is counted as a lead.
Use gross margin—not money in the bank
Gross margin should account for the direct cost of delivering the job. Fixed overheads, owner drawings, finance, tax and other operating costs still need to be paid from the gross profit that remains.
Separate lead sources
A referral, Google Ads enquiry, organic website lead and directory lead may convert at completely different rates. Combining them can hide which marketing is actually profitable.
Read the result properly
What your calculation is telling you
| What you see | Likely meaning | Sensible next step |
|---|---|---|
| The required budget is affordable and capacity exists | The growth target may be commercially realistic if lead quality and conversion remain consistent. | Choose the most appropriate visibility channel and track qualified enquiries through to revenue. |
| You already receive enough enquiries but do not win enough work | The constraint is more likely to involve qualification, response, quoting, trust, pricing or follow-up. | Audit the enquiry-to-sale process before increasing traffic. |
| Your expected CPL is close to the break-even CPL | There is too little room for overheads, mistakes or profit. | Improve margin, job value, conversion or repeat value before scaling spend. |
| The job target exceeds available capacity | More marketing could create delays, poor customer experience and additional owner stress. | Address scheduling, systems, delivery or staffing first—or refine the offer towards fewer, higher-value jobs. |
| A small conversion improvement cuts the required budget substantially | The customer journey may be your highest-return opportunity. | Improve response speed, proof, website clarity, quoting and structured follow-up. |
Cost per lead
What can you afford to pay for an enquiry?
The calculator displays a gross-profit break-even cost per lead. This is the gross profit from one job multiplied by the proportion of qualified enquiries you convert.
If an average £600 job has a 55% gross margin, it creates £330 of gross profit before marketing and fixed overheads. At a 40% conversion rate, each qualified enquiry has an expected gross-profit value of £132.
£132 is not a sensible target cost per lead.
It is only a theoretical ceiling at which the expected gross profit is consumed before rent, vehicles, software, administration, owner pay, tax and net profit. Your acceptable cost must sit comfortably below it.
Frequently asked questions
Trade lead generation questions
What counts as a qualified lead for a trade business?
A qualified lead is a genuine potential customer who wants a service you provide, is located within an area you cover, has a realistic requirement and can proceed within a useful timeframe. Spam, suppliers, job applicants, wrong numbers and work you cannot perform should not be included.
How do I calculate my enquiry conversion rate?
Divide the number of jobs won by the number of qualified enquiries received during the same period, then multiply by 100. If you won 12 jobs from 30 qualified enquiries, your conversion rate was 40%. Track by lead source where possible.
How many leads does a trade business need?
There is no useful universal number. It depends on the revenue gap, average job value and conversion rate. A business needing ten new jobs at a 50% conversion rate requires around 20 qualified enquiries; at 25% conversion it requires around 40.
What is a good cost per lead for trades?
A good cost per lead is one that produces profitable customers consistently. The correct figure depends on job value, gross margin, conversion, repeat work and overheads. Comparing your CPL with another trade—or even another business in the same trade—can be misleading.
Should I use revenue or profit when setting a marketing budget?
Both matter, but profit determines what the business can sustain. Revenue shows the scale of work created; margin shows how much remains to fund marketing, overheads and net profit. A campaign can generate impressive revenue and still be commercially poor.
Does the calculator work for repeat or recurring customers?
The main calculation uses the first job only. If customers reliably buy again, their lifetime gross profit may justify a higher acquisition cost. Be conservative: use evidenced repeat behaviour rather than assuming every new customer will return.
Is SEO or Google Ads better for generating the required leads?
Google Ads can provide visibility quickly but traffic stops when spending stops. SEO usually takes longer and can build a durable source of enquiries. The right choice depends on urgency, local competition, budget, margins, website quality and whether the business can track results properly. Many established businesses use both for different purposes.
What if I do not know my cost per qualified enquiry?
Start tracking every enquiry by source and follow it through to a won or lost job. Until you have reliable data, test several cautious CPL figures in the calculator. The range will show how sensitive the plan is and how much uncertainty you are carrying.
Beyond the calculator
Knowing the lead target is only the beginning.
If the numbers point to a visibility problem, the next question is how to generate suitable enquiries: stronger local SEO, a better website, improved Google Business Profile visibility, paid search or a combination.
If the numbers expose weak conversion, insufficient margin or limited capacity, adding marketing may be the wrong first move. That is where a wider look at positioning, pricing, customer journey and operations becomes more valuable.
Local Edge Digital works specifically with owner-led trade and service businesses. We combine practical business experience with the digital implementation needed once the real constraint is clear.
Not sure what your numbers mean?
Let’s identify what is really holding the business back.
Tell Melissa where the business is now, where you want it to go and what currently feels stuck. The first conversation is straightforward and pressure-free.