What is a takeoff in construction quoting?

A takeoff is the process of measuring quantities off a plan — lengths, areas, volumes and counts of items — so you can price the materials and labour needed. On small jobs it is done with a tape measure on site. On larger jobs it is done from drawings, either by hand with a scale rule or using takeoff software that measures directly off a PDF.

How much margin should a tradie add to a quote?

There is no single correct figure, and it differs by trade, risk and job type. What matters more is that margin is applied deliberately on top of a real cost build-up rather than guessed at the end, that it is calculated as a markup on cost rather than confused with gross margin, and that a separate contingency covers uncertainty on jobs with unknowns.

Should I quote a fixed price or charge by the hour on a big job?

Fixed price transfers risk to you and rewards efficiency; time and materials transfers risk to the customer but is harder to sell and easier to dispute. Many tradies quote fixed on work they can scope confidently and use time and materials for genuinely unpredictable work such as fault-finding, repairs or remediation, saying so clearly up front.

Quoting bigger jobs without losing money

Q: How do I stop losing money on variations?

Price and approve every variation in writing before doing the work, however small it seems and however good the relationship is. The two things that cause disputes are verbal agreements nobody can recall precisely, and work done first and priced afterwards. A short written note stating the change, the price and the effect on timing is usually enough.

By Yamate · Last updated August 2026

The jump from quoting a day's work to quoting a job worth tens of thousands is where a lot of trade businesses get hurt — not because they priced the work too cheaply, but because they priced from memory instead of from a build-up. A quote that is a single number arrived at by feel cannot be checked, cannot be defended when the customer pushes back, and cannot tell you afterwards where the money went.

1 · Build the quote up, do not guess it down

Small jobs get priced from experience, and that is fine. Big jobs need a build-up, because the errors compound. The structure is always the same regardless of trade:

Layer	What goes in it
Materials	Quantities from the takeoff, at current supplier pricing, plus waste allowance
Labour	Hours by task, at your real charge-out rate — not your wage
Plant and hire	Equipment hire, delivery, scaffolding, traffic control, tip fees
Subcontractors	Their quotes, in writing, with the same scope you are quoting
Site costs	Access, protection, cleaning, parking, travel between sites
Contingency	A deliberate allowance for what you cannot see yet
Margin	Applied on top of the total cost, deliberately

If you cannot produce this breakdown, you do not have a quote — you have a guess with a dollar sign on it. You do not have to show the customer every layer, but you need it yourself, and you will want it when the job is finished and you are working out whether it was worth doing.

2 · Measuring off the plans

Once a job comes with drawings, quoting from a site visit and a tape measure stops being enough. Measuring quantities off a plan — lengths, areas, volumes, counts — is called a takeoff, and it is the input everything else depends on. Get the takeoff wrong and every layer above it is wrong too.

There are three ways people do it:

By hand, with a printed plan and a scale rule. Free, slow, and error-prone on anything complicated.
In a spreadsheet, measuring by hand and recording quantities. Better records, same measuring risk.
With takeoff software, measuring directly off the PDF on screen. Faster, and the measurements are recorded and checkable rather than living on a marked-up printout.

For trades that regularly quote from plans — electrical, plumbing, fire, painting, concrete, plasterboard, landscaping on larger sites — dedicated takeoff tools generally pay for themselves in re-quoting time alone. Groundplan is the Australian-built one to look at. You upload the plan, measure straight off it on screen, build reusable templates for the materials and labour you use most, and export the bill of quantities. If you are quoting off drawings more than occasionally it will pay for itself on the re-quotes alone.

Templates are where the time is saved. Whatever you measure with, build reusable rate templates for the assemblies you quote repeatedly. The second quote of a type should take a fraction of the first, and consistent pricing across quotes is what makes your numbers trustworthy over time.

3 · Margin and contingency are different things

They get muddled constantly, and the confusion costs money.

Contingency covers what you cannot see yet — the wall you have not opened, the ground you have not dug, the plan detail that is ambiguous. It is an allowance against uncertainty and it should scale with how much of the job is unknown. A new-build to a clear spec carries less than a renovation on a 1950s house.

Margin is your profit. It is not a buffer, it is not contingency, and it should not be quietly spent absorbing surprises — that is what the contingency is for. Apply it deliberately on top of your full cost build-up.

Markup is not the same as margin. Adding 20% to your costs does not give you a 20% profit margin — it gives you about 16.7%. If you need a specific margin percentage, divide by (1 − margin) rather than multiplying. Getting this backwards is one of the most common and most expensive arithmetic errors in trade quoting.

4 · Write the scope so it can be defended

On a big job, what you excluded matters as much as what you included. A quote that lists only inclusions invites the assumption that everything else is covered.

Worth stating explicitly: what is included, what is specifically excluded, what you have assumed (access, power and water on site, ground conditions, who removes waste, who does making good), how long the price holds — supplier pricing moves — and the payment terms including any deposit and progress claims.

Two habits that prevent most disputes: date the quote and give it an expiry, and put the assumptions in writing even when the customer seems relaxed. Relaxed customers become precise customers when an invoice arrives.

5 · Variations are where the profit leaks

Nearly every trade business that loses money on a large job lost it on unpriced variations rather than on the original quote. The pattern is always the same: a small change is agreed verbally on site, the work is done, and it is either forgotten at invoice time or disputed when it appears.

The rule is simple and it should be absolute — price it and get it approved in writing before doing it, no matter how small, no matter how good the relationship. A short written note stating what changed, what it costs and what it does to the timeline is enough. It does not need to be a legal document, it needs to exist.

On progress-claimed jobs, keep variations visible as they accrue rather than saving them for the final claim, where they look like a nasty surprise instead of a series of agreed changes.

6 · Close the loop afterwards

The quote is a prediction. The only way it gets more accurate is by comparing it to what actually happened — hours against estimate, materials against allowance, variations against contingency. Trade businesses that do this get visibly better at quoting within a year. Ones that do not are still guessing on job fifty, with more at stake.

That is also the honest test of whether a job type is worth taking on at all. Some work is busy rather than profitable, and you only find out by checking.

Turn the quote into an invoice without retyping it →

Yamate handles quoting, invoicing, chasing and job records for solo tradies and small crews, with saved prices, itemised or fixed-price quotes, and a running estimate of GST, tax and profit per job so you can see how a job actually landed. Every quote and invoice goes through preview-then-approve before a customer sees it. It is not tax advice and you still lodge your own returns. Founder plan $19/mo if you sign up before 30 September 2026, $29/mo after; Company plan $79/mo for ten people, $15/mo per person after that. 30-day free trial, no card needed. Prices in AUD.

FAQ

What is a takeoff?

Measuring quantities off a plan — lengths, areas, volumes and item counts — so materials and labour can be priced. Done with a scale rule on a printout, or on screen with takeoff software that measures directly off the PDF.

How much margin should I add?

There is no universal figure — it varies by trade, risk and job type. What matters is applying it deliberately on top of a real cost build-up, keeping it separate from contingency, and calculating markup correctly rather than confusing it with margin.

Fixed price or time and materials?

Fixed price transfers risk to you and rewards efficiency. Time and materials transfers risk to the customer but is harder to sell. Many tradies quote fixed where the scope is clear and use time and materials for fault-finding, repairs and remediation — stating which, clearly, up front.

How do I stop losing money on variations?

Price and get written approval before doing the work, every time, however small. Verbal agreements and price-it-later are what cause both write-offs and disputes.

How long should a quote stay valid?

Long enough to be fair and short enough to protect you from supplier price movement. State the expiry on the quote rather than leaving it open-ended, and re-price rather than honouring a stale number on a large job.

Should I charge for quoting a big job?

Some tradies charge for detailed estimating on large or speculative work, crediting it against the job if it proceeds. It is a reasonable way to filter out price-shoppers, provided you say so before doing the work.

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General information for Australian businesses, not legal, contractual or financial advice. Contract, licensing and progress-payment requirements for larger building work differ by state and territory and by contract value — check your state regulator and get advice on contracts before signing. This page describes the position as read in August 2026.