Quantity Surveyor

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03/03/2026

Difference Between Lump Sum Contract & Measure & Pay Contractđź“š

✒️ Lump Sum Contract: ⚡

In a Lump Sum Contract, the contractor agrees to complete the project for a predetermined fixed price, regardless of the actual amount of work done. This means that the contractor bears the risk of any cost overruns or delays since the price remains fixed. The scope of work is typically clearly defined initially, and any changes may necessitate contract modifications or additional payments. Payments are usually tied to project milestones, with the total price unchanged unless the scope is altered. This type of contract is best suited for projects with a well-defined scope and minimal expected changes.

✒️ Measure and Pay Contract: ⚡

Contrastingly, in a Measure and Pay Contract, payment is based on the actual quantity of work completed, measured in agreed units such as square meters or cubic meters. Here, the client assumes more risk as the total cost depends on the amount of work performed. If the scope expands, costs will rise accordingly. The scope in this contract type may be more fluid, allowing for adjustments or additional work during the project, with regular measurements dictating payment schedules. Payments are made periodically based on the quantities of work completed and measured. This contract structure is ideal for projects where the scope may evolve over time or where work quantities are subject to change.

đź“ť Summary:
Lump Sum Contracts involve a fixed total price for the project, with the contractor shouldering cost risks. On the other hand, Measure and Pay Contracts determine payments based on actual work completed and measured quantities, placing more cost risk on the client in case of scope increases.

03/03/2026

Quantity Surveyors often complain about compressed tender timelines. The usual culprit? Late, fragmented, and poorly coordinated drawings from consultants.

But here’s the uncomfortable question: are we just reacting or are we managing?

Too often, QS teams position themselves as downstream recipients of information. Drawings arrive late, revisions come in waves, coordination is incomplete and suddenly the tender period becomes a firefight. We work late, we issue qualifications, we blame “design delay,” and the cycle repeats.

That is passive cost management.

A professional QS is not a document receiver. A QS is a commercial risk manager.

If drawings are incomplete, where is the drawing status tracker?
If coordination is weak, where is the formal query log issued weekly?
If key packages are missing, where is the risk register highlighting pricing uncertainty?
If the design programme is slipping, where is the escalation to the PM or client?

Tender risk does not start when drawings are issued. It starts when we fail to monitor the design deliverable schedule.

The reality: consultants operate under pressure too. Coordination gaps are systemic in fast-track projects. But that does not absolve the QS from commercial leadership.

If you wait for perfect drawings, you will always be squeezed.

If you manage information flow, track deliverables, escalate delays, and quantify uncertainty, you control the narrative.

The difference between a reactive QS and a strategic QS is simple:
One complains about time compression.
The other manages risk before it crystallises.

In today’s market, the latter is the only one adding real value.

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