From Clock-In to Cost Code: Tracking Construction Labour Cost in Real Time

There are 180 timesheets on the payroll officer’s desk at a mid-tier Perth builder, and it is only Monday morning. Some arrived as photographs of paper dockets, taken at odd angles in a ute. Two are missing entirely. One foreman has written “as per usual” across a whole week.

By Wednesday she will have a payroll run. By the middle of next month the project manager will find out what his labour actually cost in the week the slab went down, which was six weeks ago, and which he can no longer do anything about.

Why does labour cost arrive so late?

Because hours and cost live in different systems and meet only at payroll. The site records time. Payroll prices it. The budget learns about it when somebody reconciles a payroll report against cost codes in a spreadsheet, usually after the month closes.

Every one of those steps is a handoff, and every handoff adds delay. FMI and PlanGrid measured what that pattern costs across construction generally: more than 14 hours a week per person lost to non-productive work, 5.5 of them spent searching for project data.[5] Labour is typically the largest controllable cost on a build, and it is routinely the last number a project manager sees.

Compare that to materials. A purchase order commits cost the day it is raised, and a good system shows it against budget immediately. Labour, which moves faster and varies more, gets the slowest reporting cycle of the lot.

5.5 hrs/wk

Time construction professionals spend looking for project data across a typical week

FMI/PlanGrid

What breaks in a manual timesheet process

Four things, and they compound.

Capture is unreliable. Paper dockets get wet, lost or filled in from memory on Friday afternoon. A timesheet reconstructed three days later is an estimate, not a record, and it is the weakest possible evidence in a variation or delay claim.

Hours are not coded. Without a cost code against each entry, you know your total labour spend but not which activity consumed it. That total is enough to run payroll and useless for cost control.

Award interpretation is guesswork. The Building and Construction General On-site Award 2020 (MA000020) carries nine classification levels, CW/ECW 1 through CW/ECW 9, with Level 1 further subdivided, plus allowances, overtime thresholds and site rates.[1] Applying that correctly by hand across a mixed workforce is slow and error-prone in both directions.

Nothing reaches the budget. Even a clean payroll run tells the finance system what was paid, not what it should be charged against. The mapping from payroll to cost code is where the reconciliation spreadsheet lives, and where the fortnight goes.

What good labour cost tracking actually needs

Five things have to be true at once. Most builders have two or three.

The start and stop times point is the one most teams get wrong. Timesheet data can usually be stored either as start and stop times or as daily unit totals, and award interpretation only works properly with start and stop times.[2] A system that captures “8 hours” cannot tell you whether two of them attracted overtime.

Where payroll integration fits

Payroll systems are good at what construction management systems are bad at, and the reverse is equally true. The sensible architecture plays to both.

Employment Hero runs an award interpretation engine that handles MA000020 and applies tradesperson allowances, overtime thresholds and site rates per employee type.[2] That is genuinely hard, jurisdiction-specific work, and it changes whenever the award does.

What a payroll system cannot tell you is whether the concrete pour on level four is tracking above its labour allowance. That requires the hours to carry a cost code and land against a budget line, which is project data, not payroll data.

So the split is: the site system captures time and codes it, the payroll system prices it against the award, and the priced result flows back to the budget as committed labour cost. Each system does the part it is actually good at, and no human retypes anything in between.

MA000020

The Building and Construction General On-site Award, with classifications from CW1 up, plus allowances, overtime and site rates to interpret on every timesheet

Fair Work Ombudsman

What it costs to find out late

A project running 40 site personnel at an average loaded cost of $75 an hour spends roughly $120,000 a week on labour. A 10 percent overrun on a work package is $12,000 a week.

Detected in week one, that is a conversation with a foreman about crew size or sequencing. Detected after the month closes, it is $50,000 already spent, with no recoverable position and no variation to hang it on.

That pattern is the same one that erodes construction profit margins everywhere else on the job. Labour is simply the fastest-moving version of it, which is why the reporting lag hurts most here.

There is a claims dimension too. When a delay event happens, the labour records for the affected period become evidence. Contemporaneous, coded, approved timesheets support a claim. Reconstructed dockets invite an argument.

What good looks like

• Workers clock in and out on site, with start and stop times captured rather than daily totals

• Every entry carries a cost code, so hours resolve to a budget line without interpretation

• Both a cost rate and a charge rate sit against each worker, so margin and billable value are visible in the same view

• Short or anomalous shifts are flagged for review before they reach payroll, not after

• Timesheet reports generate on a set cadence and route through an approval workflow with a named approver

• Approved labour cost lands in the budget as committed cost, in the same place as subcontractor claims and invoices

• Subcontractor and head contractor hours are visible in one view, because both consume the same budget

The Australian context

Labour cost tracking in Australia carries a compliance load that does not exist everywhere. Award interpretation under MA000020, superannuation, portable long service leave schemes in several states, and the record-keeping obligations under the Fair Work Act all attach to the same timesheet data.[1][3]

The scale is significant. The Australian Bureau of Statistics tracks more than $60 billion in construction work done nationally each quarter, and labour is the largest single input to most of it.[4]

Add a tight labour market and the cost of getting this wrong rises. Underpayment creates legal exposure and reputational damage. Overpayment quietly consumes margin nobody budgeted for. Both are products of the same gap between when hours are worked and when anybody prices them properly.

Where Plexa fits

Plexa’s Timesheets module sits inside Budget and Finance rather than alongside the programme, which reflects what it is for. It captures clock-in and clock-out times against workers, trades and cost codes, holds both a cost rate and a charge rate per worker, and flags anomalous shifts for review before they go anywhere.

Worker records sync with the payroll system rather than being maintained twice, so employee numbers, departments, reporting lines and trades stay consistent between site and payroll. Timesheet reports generate automatically on a daily, weekly, fortnightly or monthly cadence, and each one runs through an approval workflow with a named initiator.

The step that closes the loop is the last one: an approved timesheet report links to the budget as labour cost. Not a report that someone reads and re-keys, but a posting. Because head contractor and subcontractor organisations both appear in the same view, the labour picture on a project is complete rather than partial.

That Monday morning in Perth looks different when capture happens on site. The 180 timesheets already exist, captured on site as the work happened, coded to the packages they belong to, with the short shifts already queried on the Thursday they occurred. Payroll runs against clean data. The project manager saw the slab pour tracking over allowance on the Wednesday it happened, while there was still a decision to make.

Frequently asked questions

Why is labour cost the last number construction PMs see? Because hours and cost live in separate systems that only meet at payroll. Site records time, payroll prices it, and the budget learns about it when someone reconciles a payroll report to cost codes manually, usually after the month closes.

What is the difference between a cost rate and a charge rate on a timesheet? The cost rate is what the hour costs your business and drives margin. The charge rate is what the hour is billed at, which matters on cost-plus contracts, variations and day works. Tracking both lets you see margin and billable value from the same record.

Do construction timesheets need start and stop times, or are daily totals enough? Start and stop times. Award interpretation engines require actual start and end times to correctly apply overtime thresholds, penalties and allowances. Daily unit totals cannot support that calculation.[2]

Which award covers on-site construction workers in Australia? The Building and Construction General On-site Award 2020, MA000020, which sets nine classification levels for construction workers and engineering construction workers, CW/ECW 1 through CW/ECW 9, along with allowances, overtime and site rates.[1]

Does payroll software replace construction labour cost tracking? No. Payroll prices hours correctly against the award. It does not know which work package consumed them. Cost codes and budget linkage are project data, so the two systems need to connect rather than substitute for each other.

Related reading

Labour is one half of the committed cost picture; the other is covered in why construction invoices take six weeks to approve. For why these reporting lags erode margin, read why construction profit margins keep getting tighter. And the structural case for keeping cost, programme and site data together is made in the single source of truth in construction management.

If you want to see labour cost landing in your budget the week it is incurred, book a 30-minute demo with the Plexa team.