How Much Is Your Roster Actually Costing You?

Ask an operator what their roster costs and they quote the wage bill. The real number is bigger, and the gap is where margins quietly go: premiums and on-costs on every hour, overtime that became routine, payroll errors that take a morning to unpick, and the manager hours spent building the thing every single week.

The four costs hiding behind the wage bill

1. The true cost of each shift. Once penalties, loadings and employer on-costs are applied, a shift can cost 20–60% more than its base wages — and weekend-heavy rosters feel it most. Put your own numbers through the free true shift cost calculator and compare a Tuesday against a Sunday.

2. Overtime that nobody chose. Chronic overtime is usually hidden understaffing: a four-crew workload on three crews of people. Above roughly 5% of hours, overtime stops being a buffer and becomes structural — see the coverage math for the honest headcount.

3. Payroll errors. Wrong rates and missed premiums cost real money in back-pay and re-runs — and even more in trust. Each avoided error is worth roughly a hundred to several hundred dollars once admin time is counted.

4. The manager's week. Five to ten hours a week building, fixing and communicating rosters is normal in manual operations. It is also the single most recoverable cost on this list: most of it is exactly what scheduling software automates.

Count it for your business

The free Tommy ROI calculator turns these four lines into one annual figure from your own inputs — team size, rostering hours, rates, error count. No email, editable assumptions, and the result prints to a one-page report you can put in front of whoever signs things off.

Then go one level deeper where it matters for your market: cost a single shift properly, forecast next week's roster before publishing it, or check the labour percentage your revenue is carrying — the calculator suite covers each step.

What to do with the number

Three moves, in order: fix the roster shape first (match hours to the demand curve — the pattern decision drives more cost than any rate), automate the premiums and timesheets so errors stop at the source, and only then talk headcount. Most teams find the first two moves pay for the software many times over — which is exactly what the calculator shows.

Build this schedule in Tommy

Set the rotation once and Tommy fills the weeks ahead — shift swaps, leave and coverage gaps handled in one place, with your team always seeing the latest version.

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