Bill of Quantities (BOQ) Explained

What is a Bill of Quantities (BOQ)?

A Bill of Quantities (BOQ) is an itemised list of every measurable component of a construction project, structured trade by trade, with quantities set out against a description and a unit of measure: cubic metres of concrete, square metres of formwork, lineal metres of edgeboard, tonnes of steel. It's the standard document Australian subcontractors and builders price against when they tender, because it fixes exactly what's being measured before anyone attaches a dollar figure to it.

Measured quantities vs rates

A BOQ on its own is quantities, not price. The quantities are measured off the drawings by an estimator; the rates (labour, material, plant, margin) are applied separately, usually by whoever is actually going to do the work. This split matters. A subcontractor who applies their own rates to someone else's measured quantities knows their number is only as good as the measurement, and knows exactly what they're pricing rather than guessing at scope under time pressure.

Who prepares a BOQ, and how does it differ from a takeoff or an estimate?

In Australia, a BOQ is usually prepared by an independent estimator rather than the subcontractor themselves, precisely so the quantities are neutral and every tenderer is pricing the same scope. The terms overlap in everyday use, so it's worth being precise about the difference: a takeoff and a BOQ describe close to the same thing, measured quantities, unpriced, while an estimate applies rates to those quantities to produce a total dollar figure. See our full breakdown of takeoff vs estimate for where the line sits.

BOQ formats and how subbies use one to tender

Most HYKSOS BOQs are delivered as a trade-sheet Excel workbook, one tab per element on a single-trade job or per trade on a full-construction job, with a pivot summary tab that rolls the detail up into totals a subcontractor can sanity-check at a glance before drilling into the line items. A formwork BOQ, for example, separates soffit area, edgeboard by height band, and vertical faces like set-downs, because each is priced differently and a flat square-metre rate would miss the vertical formwork entirely. A subbie tendering off a proper BOQ applies their own labour rates and material discounts to a fixed set of quantities and submits a competitive number without being exposed to scope they measured themselves. Builders and developers who need the total cost of the job, not just the quantities, should look at a full construction estimate instead.