Construction Quotation vs BOQ: What's the Difference?

Published 2026-08-08 · Faruk Hossain

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They contain similar numbers but serve different purposes. Confusing them causes real commercial problems.

These two documents get used interchangeably in conversation, which causes confusion when a client asks for one and receives the other.

A quotation is a commercial offer. It is you saying: I will do this defined scope, for this price, under these terms, valid until this date. It is directed at one client, it carries commercial terms, and if accepted it forms the basis of a contract. The pricing structure is yours to decide.

A Bill of Quantities is a measured schedule. It lists items with quantities and units, and leaves rates to be filled in. Its purpose is comparison — the same bill goes to several contractors, each prices it, and the client compares like with like. It carries no commercial terms of its own.

The practical difference in your workflow: a quotation is written from your perspective and protects your position through exclusions and assumptions. A BOQ is written from the project's perspective and is deliberately neutral.

Where they overlap: a detailed quotation often has a BOQ behind it. You measure the work into a bill, price the bill, then present a quotation with the bill as backing. This is good practice — it means when the client queries an item, you have the measurement to justify it.

What clients usually mean. A homeowner asking for a BOQ almost always wants a detailed quotation. A main contractor or consultant asking for a BOQ usually means exactly that, in their own format, for tender comparison. Ask which one before you start; the work involved is quite different.