Cost of a Bad Hire in Construction

A new labourer starts on Monday. By Thursday they've gone, and you've paid for the ad, the induction and four days of wages. Here is the cost of a bad hire in construction, and how to work out yours.

The short answer: what is the cost of a bad hire in construction?

The cost of a bad hire is more than the wages you paid. You also lose rework, crew overtime, supervisor time and the cost of hiring again. Published ranges vary a lot, so treat them as a rough guide. Your own number, built from your own rates, is the one that matters.

Some Australian recruiters and hiring software firms publish big figures. They don't agree with each other, and none of them knows your crew or your rates.

So don't borrow a number. Build yours. This post shows you how, in plain steps you can do with a pen and your timesheets.

What "bad hire" means on a building site

A bad hire is someone who can't or won't do the job you hired them for. On site that usually looks like one of these:

• The wrong skill level for the work.
• A poor attitude that drags the crew down.
• Unsafe habits.
• They quit or get let go in the first few weeks.

Any one of these is enough to cost you real money.

A new starter who is slow in week one isn't a bad hire yet. Someone who is still the same by week four, with no plan to fix it, probably is.

The costs that show up on the invoice

These are the costs you can find in the books. Add them up first.

• Ads and job boards. What you paid to find them.
• An agency fee, if you used one. Some agencies charge a percentage of the first year's pay. Check your own terms.
• Wages and on-costs. On-costs are the extras on top of pay, like super and insurance. You pay them whether the person delivers or not.
• Training time. Induction, tickets and the hours spent showing them the job.

Want to see your own numbers? The free hiring cost check lets you put in your own rates and see what an empty or failed role costs you.

The costs that do not show on the invoice

These costs hide in the job, not the books. They are often the bigger part.

• Rework. Work that has to be pulled out and done again, plus wasted materials.
• Crew overtime. Your good people cover the gap, and overtime costs more.
• Delay. A late stage can push back the trades that come after it.
• Supervisor hours. Time spent checking, fixing and coaching instead of running the job.
• Morale. Good tradies get tired of carrying someone. Some start looking elsewhere.
• Safety exposure. An unsafe habit is a risk to the whole site. It is hard to put a price on, so don't leave it out.

Worked example (example only)

This table uses made-up round numbers for one hire. It is example only. It is not an average and it is not a benchmark.

Say a carpenter starts, stays six weeks (240 hours), and then leaves. Say half of those hours produced nothing usable.

Cost line	Example working	Example cost
Ad	One job ad	$600
Your time to hire	10 hours at $90	$900
Wages and on-costs for hours that didn't deliver	120 hours at $60	$7,200
Rework by the crew	40 hours at $60	$2,400
Wasted materials	Assumed	$800
Supervisor time	15 hours at $90	$1,350
Crew overtime to catch up	30 hours at $90	$2,700
Hiring again	One ad ($600) plus 10 hours at $90 ($900)	$1,500
Total		$17,450

The rates are invented. Your wages, overtime and job size will give a different answer, and a delay can add more.

Use the free hiring cost check with your own rates instead of these ones.

To do your own sums, follow these steps:

1. List every cost on the invoice side, with real dollar amounts.
2. For each hidden cost, count the hours lost and multiply by what those hours cost you.
3. Add the two together.
4. Save the sheet, then compare it to the pay of the role you're hiring for.

That comparison is often the eye-opener. A person who looked cheap at the rate can end up costing more than their wages.

What published ranges say and why they disagree

Here are three sources. They are sellers of recruitment or hiring software, so read their numbers as their view, not as settled fact.

• Elite Construction Recruitment says a bad hire in construction or engineering can exceed $50,000. The page says "industry data" but doesn't name a source. It lists project delays, re-recruitment, training time, team disruption and safety or compliance risks.
• Compono, a hiring software company, says a bad hire in Australia can cost 30% to 150% of first-year salary, and up to 200% for senior roles. Compono credits Wise Recruitment for the range. On an $80,000 salary, it works out at $24,000 to $120,000.
• TradeConnex lists the types of cost a bad hire creates: wages paid, onboarding and training time, lost productivity, project delays and team morale. It doesn't give a dollar figure.

Why do they differ? They count different things, and they measure different roles. One counts a labourer, another counts a manager. Some include lost profit and some don't.

That is why a worked example from your own rates beats any headline number.

How to cut the risk before the next offer

You can't remove every bad hire. You can make them rarer.

1. Write a five-minute brief. What does the person do in week one, and what does good look like by day 30? Write it down.
2. Ask every candidate the same questions. It makes comparing people fairer and faster. The post on interview questions for carpenters is a good start.
3. Ask the last foreman about the worst day. "Tell me about a day it went wrong. What did they do?" You learn more from that than from "Were they good?"
4. Put the offer in writing. Pay, start date, hours and what you've agreed. It avoids "I thought you said" later.
5. Plan the first 14 days. Who they work with, what they do each day and when you check in. Our post on how to keep good tradies covers what happens after week two.

The free 7 Hiring Mistakes report and Recruiter's Toolkit puts these steps into checklists you can use on the next hire.

If you'd like to see how you score on hiring today, try the free hiring scorecard.

When paying for help still makes sense

Sometimes it does. If you need a person fast, or you have no time to interview, an agency or labour hire firm can be the right call.

Know what you're paying for first. Our guides on recruitment agency fees in Australia and labour hire vs direct hire lay out the costs side by side.

Hiring a senior role such as a site manager? Our guide on how to hire a site manager in Australia walks through the steps.

HiredConstruction is not an agency. The aim is to teach you to run your own hiring, so you need help less often.

General information only, not legal or tax advice. The worked example uses made-up numbers. The published ranges are what each source says, not research by HiredConstruction.

Want help with your next hire?

Book a free 15-minute discovery call and we will talk through your next hire. Prefer to learn it yourself? The Construction Hiring System course ($497 AUD) teaches the full method.

FAQ

How much does a bad hire cost in construction?

It depends on the role, the pay and how long they stay. Published ranges vary, from a recruiter's "over $50,000" to a software firm's 30% to 150% of first-year salary. None of them knows your crew. Add your own wages, rework, overtime and re-hiring costs to get your number.

What should I include when I calculate the cost of a bad hire?

Include what's on the invoice: ads, any agency fee, wages and on-costs, and training time. Then add what isn't: rework, crew overtime, delay, supervisor hours and lost morale. Use your real rates for each line. Keep your working so you can reuse it next time.

Is there a cost of a bad hire calculator for builders?

Yes. The free hiring cost check lets you enter your own rates and see what a failed or empty role costs you. It is a planning tool for builders. It is not tax or legal advice, and the result is only as good as the numbers you enter.

How do I stop the next bad hire?

You can't stop every one, but you can cut the risk. Write a short brief first, ask every candidate the same questions, and ask a past foreman about the worst day. Put the offer in writing, and plan the first 14 days so the new person knows what good looks like.

Does a bad hire cost more than an empty role?

Sometimes, but not always. An empty role costs you lost work, overtime and stress. A bad hire costs all that, plus their wages, the rework and the cost of hiring again. Work out both with your own numbers before you decide to rush a hire.