Industry research consistently finds that trade businesses without real-time job costing lose an estimated 10–20% of project profit to materials overruns, untracked labour, and variations that don’t get billed. That’s not a margins problem. It’s a visibility problem — and it has a technology solution.
Why gut feel stops working as you grow
When you’re doing a handful of jobs a week and buying materials from one supplier, you can hold the numbers in your head reasonably well. When you’re running multiple jobs simultaneously, using multiple suppliers, and employing or subcontracting labour, the mental model breaks. The gap between what you quoted and what the job actually cost you only shows up weeks later — often after the invoice has been paid and there’s nothing you can do about it.
What job costing software actually does
Platforms like simPRO, AroFlo, Buildertrend, and Xero Projects let you track costs against a job in real time — materials, labour hours, subcontractors, and overhead allocation. At the end of a job, you have an actual cost versus what you quoted. Over time, that data tells you which job types are profitable, which clients are worth having, and where your estimates are consistently off.
The labour side is usually the first thing businesses fix — adding timesheet capture through the job management platform means hours flow into the job record automatically instead of being estimated at the end of the week.
Supplier integration — the part most businesses haven’t done yet
Where it gets genuinely powerful is connecting your supplier account to your quoting and job management platform.
Platforms like simPRO and Buildxact support direct integrations with major trade suppliers — Reece, Tradelink, Rexel, and others — meaning live pricing pulls into your quotes automatically. When copper prices move, your quotes reflect it. When you buy materials against a job, the purchase order flows into the job’s cost record without manual entry.
The result: your margin is visible before you submit the quote, not after the job is done.
Variations — the profit killer nobody talks about
One of the most common sources of margin leakage in trade businesses isn’t bad quoting — it’s unbilled variations. Extra work gets done, the client says yes verbally, and it never makes it onto the invoice.
Job management platforms with variation management let you raise a variation on site, get client approval via SMS or email, and have it flow automatically into the final invoice. Nothing falls through the gap.
Where to start
If you’re not doing any job costing at all, the first step is usually timesheet capture — get labour tracked against jobs and you’ll immediately see which jobs are running over on hours.
If you’re already tracking labour and want to add materials costing and supplier integration, that’s where a platform like simPRO or AroFlo typically comes in.
We help trade businesses work out which platform fits how they actually operate, and get the supplier connections set up without the usual IT headaches. Get in touch if you’d like a conversation about where to start.