Busy but No Profit in Your Construction Business? Find the Leak
The short answer
Being busy and making no money is almost never a work problem. It is a pricing, cost-control or cash problem. Re-cost your last three jobs and the leak usually shows itself within half an hour.
- Turnover is not profit. A full diary at the wrong price just means you lose money faster.
- Most leaks are in 7 places: pricing, your own wage, overheads, prelims, unpriced extras, labour overruns and getting paid late.
- Re-cost your last 3 jobs against what you quoted. The gap tells you which leak is yours; fix the one costing the most £ first.
- Pay yourself a fixed wage and price to a margin. On main-contractor work we aim for 25–35% gross margin and about 10% net after overheads.
You've had a full diary all year. The van is on the road at seven, you're pricing jobs at ten at night, and the turnover looks decent. But at the end of the month there's nothing in the bank, and the VAT bill is a worry. Busy but no profit is a construction business problem you can fix.
This is one of the most common things owners tell us on a first call. The good news: it's rarely a work problem. You already have the work. The money is leaking out somewhere between the quote and the bank, and you can find where. Want us to look at yours? Book a free strategy call.
Why busy doesn't mean profitable
Turnover is what comes in. Profit is what's left after every cost, including you. A builder turning over £400K can take home less than one turning over £150K, because the extra work was priced too low or ran over.
If a job loses £2,000, doing ten of them doesn't fix it. It loses £20,000, and ties up your cash and your evenings while it does.
The 7 places profit leaks out of a building business
In almost every business we look at, the money goes in one or more of these places:
- Priced by feel: a day rate or £ per m² from memory, "what the last one cost", or matching a competitor.
- Your own wage isn't in the price: you count your days as profit. Then you work for nothing on half your jobs.
- Overheads aren't recovered: van, insurance, accountant, phone, software, marketing, office. If no price carries them, they come out of profit.
- Prelims are missing: skips, protection, parking, scaffold, travel, waste, supervision. On a long job they can wipe out the profit.
- Extras done for free: "while you're here" jobs, client changes and hidden problems, never priced or signed.
- Labour runs over: the job planned for six weeks takes nine. Every extra week is wages and prelims with no income.
- Paid after the work: invoicing at the end of each stage means you lend the client your wages, subcontractors and materials for weeks.
The first five are pricing leaks. The sixth is a delivery leak. The seventh doesn't change the profit, but it makes a thin margin feel like no margin at all.
Flat out but no profit at the end of the month?
Book a free call with our team. We'll look at your last jobs and show you where the money leaks.
The 30-minute test: re-cost your last 3 jobs
Don't guess which leak is yours. Take your last three finished jobs, open the invoices, timesheets and merchant statements, and fill in this table for each.
| Line | Job A: £18,000 bathroom | Job B: £42,000 extension | Job C: £9,500 kitchen |
|---|---|---|---|
| Price (ex VAT) | £18,000 | £42,000 | £9,500 |
| Labour incl. your own days | £6,800 | £13,500 | £3,900 |
| Subcontractors | £2,400 | £9,800 | £900 |
| Materials | £4,900 | £11,200 | £3,100 |
| Prelims (skips, parking, protection) | £600 | £2,100 | £300 |
| Share of overheads at 12% | £2,160 | £5,040 | £1,140 |
| Net profit | £1,140 (6%) | £360 (1%) | £160 (2%) |
The figures are an illustrative example. Use your own numbers. Don't know your overhead percentage? Add up 12 months of overheads, including a fixed salary for you. Divide by the turnover you expect, for example £60K ÷ £500K = 12%. To see the turnover you need just to cover them, work out your break-even.
- Count your own days at a real day rate. Your wage is a cost.
- Put every extra you did for free next to the job.
- Write down how many weeks you planned and how many it took.
- Note when each payment arrived compared with when you spent the money.
Read the result: which leak is yours
Now look at where each job went wrong against what you planned when you quoted.
| What you see | The leak | First fix |
|---|---|---|
| Every job thin, even when it went well | Pricing: margin too low, wage or overheads missing | Rebuild the price: cost ÷ (1 − margin) |
| Good on paper, bad in the bank | Paid after the work | Deposit plus stage payments before each stage |
| One job type always worse than others | That work is underpriced, or you're slow at it | Re-price it or stop doing it |
| Labour way over plan | Delivery: no day-by-day plan, crew pulled between jobs | Programme every job, fix the crew to it |
| Lots of small "extras" listed | Extras done for free | Price and sign every variation before doing it |
| Prelims eat the margin on longer jobs | Prelims not priced | Price prelims as their own line |
Taking on more work to "make it up". More work at the same price brings more of the same result, plus more cash tied up and less time to fix anything.
Want a second pair of eyes on your numbers?
Book a free strategy call and we'll find the leak with you.
The fixes, in the order that recovers the most money
Fix one leak at a time, starting with the one that cost the most £ on your last three jobs.
1. Rebuild your price from cost, not feel
List every cost line, add prelims, then price to a target margin: price = cost ÷ (1 − margin). For a 30% margin on £44,500 of cost, that's £44,500 ÷ 0.70 = £63,600. Use margin, not markup: a 25% markup is only a 20% margin. The full method is in our guide to pricing building work.
2. Put yourself and your overheads in every price
Pay yourself a fixed monthly wage and treat it as an overhead or as labour on the job. Then every quote carries it. Here is how to set a wage the business can afford. If the business only survives when you take nothing, the prices are wrong.
3. Stop doing extras for free
Anything not written in the quote is a variation. Price it, get it agreed in writing, then do it. Write exclusions, allowances and provisional sums into every quote so there's no argument later. If a job has already gone wrong, see what to do when you've underquoted.
4. Get paid before you work
Take a deposit on signing and make every stage payment due before that stage starts. Long-lead items like kitchens and glazing get paid for upfront.
The clients who argue about paying upfront are usually the same clients who pay late at the end. A clear schedule filters them out before they cost you money.
5. Plan labour day by day and check weekly
Programme every job: task, who, which day. Order materials once, in full. Every Friday, compare cost to date with the plan. If it drifts, you know in a week, not at the end. Our construction business KPIs guide lists the five numbers to check.
6. Separate the money
Run three accounts: operating, tax (VAT, CIS, corporation tax) and profit. Move the tax share out the day money arrives. Never use a new deposit to finish an old job. If the profit is there on paper but not in the bank, read profitable on paper but no cash.
What fixing it looks like
Ghennadi, a decorator from Northampton, went from £2K to £13.5K a month profit in 60 days, largely by pricing jobs properly and presenting quotes live.
Adam & Ali were averaging about £2,700 a job. After rebuilding how they sold and priced, they signed £91,796 in 8 days at up to 46% margin. Then came a £528K project at around 34% margin.
£2K to £13.5K a month profit in 60 days
Ghennadi, decorator, Northampton: pricing properly and presenting quotes live. Individual results, not typical or guaranteed.
We don't run a standard program for hundreds of businesses. Sviat Jay runs a working construction company, Craftex, and mentors owners one-to-one. He finds where your business is strong and where the money leaks, and works on both. Most owners see results in about four months, not years. To start, book a free strategy call.
Not sure which area to fix first? Take the free 4-minute Construction Business Scorecard. It scores pricing, cash, sales and systems and shows the weakest one.
The Cash Flow & Margin Blueprint
The job profit calculator, payment schedule template and 4-week cash forecast we use, so every job pays for itself.
Get the free guideYour next 7 days
This is general information from a contractor's experience, not financial advice. For your situation, speak to your accountant. On the tools and under £500K a year? Watch our free training first.
Before you go
- Re-cost your last three finished jobs, including your own days
- Work out your overhead percentage from 12 months of costs
- Set a fixed monthly wage for yourself
- Add prelims and exclusions to your quote template
- Change your payment terms to deposit plus stage payments in advance
