Work Order vs BOQ: the difference, explained

Why the confusion costs money

On a busy site, "BOQ" and "work order" get used almost interchangeably — and most of the time it doesn't matter. But when it comes to billing and contract control, treating them as the same thing is where money quietly leaks. Bill against the wrong rates, exhaust a work-order value without noticing, or lose track of deviations, and you end up with disallowed claims, delayed payments and a painful reconciliation at closeout. Understanding the distinction — and keeping the two linked — is one of the simplest ways a contractor can protect margin.

BOQ — the priced "what and how much"

A Bill of Quantities (BOQ) is the itemised, priced schedule of work: each item of work, its unit of measurement, the estimated quantity, and the agreed rate per unit. It is the basis on which work is measured and valued as it's executed. If you want to know how much a slab is worth, or how much excavation remains to be billed, you're asking a BOQ question.

The BOQ answers two things: what work is to be done, and how much each unit of it is worth. It does not, by itself, say who authorised the work or on what commercial terms — that's the job of the work order. A BOQ can exist at tender stage (to price a bid) and then become the live basis for billing once work begins.

Work order — the "go ahead, on these terms"

A work order (WO) is the contractual instruction that authorises the work to proceed. It carries the commercial frame: the WO number and date, the total order value, the GST treatment, the retention percentage, and the validity or expiry. Where the BOQ is a schedule of priced items, the work order is the agreement under which those items are executed and paid for.

The work order answers a different pair of questions: who authorised this, and on what terms. A BOQ usually sits underneath a work order — the order says "execute this scope, up to this value, on these conditions," and the BOQ is the detailed, priced breakdown of that scope.

BOQ vs work order — at a glance

How they work together

The two aren't rivals — they're layers of the same contract, and billing only stays clean when they're linked:

• The work order sets the commercial frame (value, GST, retention, validity)
• The BOQ lists the priced items executed under that order
• Measurements record executed quantity against BOQ items
• RA bills value that quantity and bill it under the work order
• The balance quantity and remaining order value always reconcile

A single project commonly has several work orders, each with its own BOQ group, rates, GST and retention — additional work, a separate package, or a different client entity. They must be tracked separately, or you risk billing one order's work at another's rates, or running an order past its value.

See it in action

In True Site Sync, each BOQ group is attached to its work order, so executed quantity and consumed order value are visible together.

Illustrative — a BOQ group linked to its work order, with terms and balance shown together.

Deviations and extra items — where the link matters most

The cleanest theory meets reality the moment work deviates from the BOQ — and it always does. A deviation is executing more or less of a BOQ item than the contract quantity. An extra item is work that wasn't in the original BOQ at all. Both are completely normal, and both are where margin is won or lost.

The danger is that deviations and extras are easy to execute and easy to forget to record — until the client's QS disallows an over-run, or you realise at closeout that extra work was never billed because it had no BOQ line. When the BOQ is linked to its work order, you can flag deviations and extras against the right contract as they happen, get them approved, and keep the order value honest. That's the difference between a controlled contract and a scramble at the end of the job.

How to track both, in practice

A worked example

Say a builder issues you Work Order WO-12 for ₹1.85 crore, with 18% GST (CGST+SGST) and 5% retention, valid for nine months. That's the work order — the commercial frame. Under it sits a BOQ listing the priced items: RCC M25 at ₹20,000/m³ for 160 m³, TMT steel at ₹60,000/MT for 64 MT, and so on. The work order doesn't carry those rates; the BOQ does. The BOQ doesn't carry the retention or validity; the work order does.

As work proceeds, your team measures executed quantity against the BOQ items — say 96.5 m³ of RCC and 38.2 MT of steel to date. Those measurements draw down the BOQ (leaving 63.5 m³ and 25.8 MT in balance) and are valued at the BOQ rates. The resulting RA bill is raised under WO-12, so it applies that order's 18% GST and 5% retention, and the cumulative billed value is checked against the ₹1.85 crore order value — currently about 23% consumed. If the builder later issues WO-18 for additional work, it gets its own BOQ, its own rates and its own terms, tracked entirely separately. Mix them up and you'd bill the wrong rates or breach an order; keep them linked and everything reconciles by itself.

Who needs to get this right

What goes wrong when they're not linked

When the BOQ and the work order live in separate, disconnected places, four failures recur. You bill at the wrong rates because the BOQ used doesn't belong to the order being billed. You overrun the order value without realising, then can't get the excess paid. You let an order expire mid-work and lose the commercial cover for what you've executed. And you miss extras and deviations, so genuine work goes unbilled or unapproved. Each is avoidable with one discipline — keep every BOQ group attached to its work order, and let the software reconcile executed quantity against order value automatically.