The job that looked profitable on paper
A lot of construction firms don't get into trouble because they can't win work. They get into trouble because they win work they can't properly cost, staff, or fund at the same time as everything else on the books.
The contract looks fine when you're pricing it in isolation. It's only three jobs later, when retentions haven't landed, a subcontractor invoice comes in higher than quoted, and two site managers are stretched across four projects, that the cracks show. By then it's too late to say no.
Before taking on more work, a construction firm needs clear answers to a handful of questions — not gut feel, not a spreadsheet nobody's updated since March.
Job costing: what it actually costs to deliver
Most quotes are built on estimated costs. The real test is whether you track actual costs against that estimate as the job runs, job by job, not just at final account.
At minimum you should be tracking, per job:
- Labour hours and cost (your own team, not just subcontractor invoices)
- Materials cost against what was allowed for in the quote
- Subcontractor and supplier costs as they're invoiced
- Plant and equipment hire or usage cost
- Variations and their approval status
- Retention held and when it's due
If this only exists in a spreadsheet that gets updated when someone remembers, you're finding out you've gone over budget after the job's finished — when there's nothing left to do about it. Job and project tracking that updates from timesheets, purchase orders and supplier invoices as they happen gives you the actual cost picture while the job is still live, when you can still act on it.
Capacity: people, not just headcount
Having fifteen people on the books doesn't mean you have capacity for another job. What matters is:
- Which site managers and supervisors are already committed, and to when
- Which trades are booked out, and for how long
- What plant and equipment is already allocated
- Whether your current jobs are running to programme or slipping
A firm that's already firefighting on two sites doesn't have spare management bandwidth for a third, even if the labour is technically available. Overcommitting management capacity is one of the most common ways construction firms let quality and safety slip on the jobs they already have, in the pursuit of the next one.
Cash flow: when the money actually lands
Construction cash flow rarely matches construction cost timing. You're paying labour weekly, materials on account terms, and subcontractors on their own schedules — while your own invoices might be on 30, 60, or 90-day terms, with retention held back for months on top.
Before taking on a new contract, ask:
- What's the payment schedule, and does it match when costs will actually fall due?
- How much retention will be tied up, and when does it release?
- Does this job's cash flow overlap badly with an existing job's low point?
- Do you have enough working capital to cover the gap if a payment runs late?
This is where job costing and accounting need to sit in the same system rather than two different ones. If your accounting function can see live job costs and your job costs can see what's actually been invoiced and paid, you get a genuine cash flow picture rather than a guess based on last month's bank balance.
Programme risk: what happens if this job overruns
Every construction job carries some risk of running late — weather, late deliveries, design changes, third-party dependencies. The question before taking on more work is what happens to your other commitments if this one overruns.
- Does your team have any slack, or is every week already booked?
- Is there a knock-on effect on the next job's start date?
- Will a delay on this job trigger penalty clauses or damage a client relationship you can't afford to strain?
Firms that track programme against actual progress — not just at monthly review, but as a running picture — spot slippage early enough to manage it, rather than discovering it when the client asks why the job isn't finished.
Why this usually lives in too many places
The reason most construction firms struggle to answer these questions quickly is that the information is scattered. Costs sit in accounting software. Programme sits in a project tool or a spreadsheet. Site data comes back on paper or in a WhatsApp group. Capacity is in someone's head.
By the time all of that gets pulled together into one report, the decision about whether to take the next job has usually already been made on instinct.
A connected system changes that. When job costing, scheduling, field operations and accounting sit in one platform, a business owner can see — for any live job — the actual cost position, the resource commitment, and the cash flow impact, without waiting for someone to build a report. That's the difference between deciding to take on work with evidence, and deciding on hope.
Where N Six Hub fits
N Six Hub connects the full run of a construction job — quote, job costing, scheduling, site updates, invoicing and accounts — in one platform, so the real cost and capacity picture is always current. Instead of chasing five systems for an answer, you get one place to check before you say yes to the next contract.
If you're weighing up whether your firm has the capacity, cost control and cash flow to take on more work, it's worth seeing what N Six Hub for construction firms looks like for a business your size, or exploring the platform as a whole.