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How to Calculate Builders Margin Correctly

How to calculate Builders Margin?

Accurately calculating your builders’ margin is critical for running a profitable construction business in Australia. Misunderstandings about margin, markup, and profit can lead to underquoting, lost revenue, or even project losses.

In this article, we explain what a builders’ margin is, why it matters, how to calculate it correctly, and how a software tool like iGyro can streamline your estimates, variations, and client-facing proposals.

What is a builders margin, why it matters, how to calculate it correctly, and how a software tool like iGyro can streamline your estimates, variations, and client-facing proposals.


What is a Builders' Margin?

A builders’ margin is the percentage added to the cost of a construction project to ensure a profit. It covers your business overheads, risks, and allows you to maintain profitability.

For example:

  • Costs: Materials, trades, labor
  • Builders' Margin: The percentage that ensures the builder makes a profit after all costs

Why is the Builders’ Margin Important?

The correct builders’ margin ensures:

  1. Profitability: You cover your costs AND generate profit.
  2. Business Viability: It accounts for overheads like rent, software, and staff wages.
  3. Risk Management: Construction projects are dynamic, and unexpected expenses can arise. A margin creates a financial buffer.
  4. Client Transparency: Providing clear, accurate estimates builds trust and avoids disputes.

Builders' Margin vs. Markup: Understanding the Difference

Many builders confuse margin and markup, leading to costly miscalculations. Here’s the key difference:

  • Markup: The percentage added to the cost to arrive at the final price.
  • Margin: The percentage of the final price that is profit.

If you calculate a 20% markup, your margin is NOT 20%.

Example Calculation

Let’s break this down:

Cost of VariationMarkup %Selling PriceProfit Margin %
$100,00020%$120,00016.7%
$100,00025%$125,00020%
  • Markup = 20% of $100,000 → Final Price = $120,000
  • Margin = Profit ($20,000) ÷ Final Price ($120,000) = 16.7%

Misunderstanding this difference can mean you’re earning less than you think.

Correct Builders Margin Calculation - If the cost of materials and labour is $100,000 and your margin is 20% (0.2)

  • Retail Price (excluding GST) = Cost of Materials and Labour ÷ (1 - Margin as a Decimal)
  • Retail Price = $100,000 ÷ (1 - 0.2) = $100,000 ÷ 0.8 = $125,000

Why Manual Calculations Are Costing You

If you’re still calculating builders’ margin manually or using spreadsheets, you’re at risk of:

  1. Human Error: Small mistakes add up to big losses.
  2. Wasted Time: Manually checking figures slows you down.
  3. Inconsistent Estimates: Your team might calculate margins differently.

In today’s fast-moving construction industry, relying on manual processes leaves money on the table.


iGyro Builders Management: Streamline Your Margin Calculations

The iGyro SaaS platform is designed to simplify builders’ margin calculations, estimates, and variations. Here’s how iGyro helps you stay profitable and efficient:

software to calculate builders margin

 

1. Accurate Margin & Markup Calculations

iGyro automatically calculates the correct margin and markup for any project, ensuring you never underquote or lose profit.

2. Client-Facing Estimates Made Easy

Generate clear, professional estimates that help clients understand the cost breakdown while protecting your margins.

3. Handle Variations Effortlessly

Changes in construction happen. With iGyro, you can update estimates on the fly and notify trades instantly when their schedules change.

4. Eliminate Errors & Save Time

iGyro does the heavy lifting—no more manual spreadsheets or second-guessing. Streamline your workflow, save time, and grow your profit.


Why Choose iGyro Over Other Tools?

iGyro is built specifically for residential home builders. It’s:

  • User-Friendly: Intuitive and easy to use for builders and teams.
  • Purpose-Built: Designed for margin, markup, and construction estimates.
  • Free for One User: Start with iGyro at no cost.

estimate software including builders margin


Ready to Get Your Builders’ Margin Right?

Stop leaving profit on the table. Accurately calculate builders’ margins, create professional estimates, and manage variations seamlessly with iGyro Builders Management.

Try iGyro for Free Today and Protect Your Margins!


Frequently Asked Questions (FAQ)

Q: What is a good builders' margin?
A: A builders’ margin typically ranges from 15% to 25%, depending on your costs, project type, and region.

Q: How do I calculate builders' margin easily?
A: Use iGyro Builders Management software. It automates margin and markup calculations, saving time and eliminating errors.

Q: Why can’t I rely on markup alone?
A: Markup doesn’t accurately represent your profit margin. Misunderstanding this difference can reduce your earnings.

Q: Is iGyro free?
A: Yes! iGyro is free for one user, making it perfect for solo builders and small teams. iGyro will scale as your business grows.

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