The Cost of an Unfilled Trades Vacancy: A Framework for Employers

A vacancy is not a saving

An unfilled role can look like a saving on a payroll report. No wage is being paid for that seat. That view misses where the cost moves. Work still has to be covered, deadlines still sit on the calendar, and people still spend time trying to fill the role. The cost does not disappear. It spreads across overtime, schedule risk, and management time, where it is harder to see and harder to control.

This article gives you a framework, not a statistic. IronPath does not present an average vacancy cost for Canadian trades employers, because your cost depends on your crew size, your wage rates, your commitments, and how long the role stays open. Use the framework with your own inputs, label your assumptions clearly inside your business, and update the estimate as the vacancy ages.

The cost stack, piece by piece

1. Overtime premiums for the existing crew

When a role is empty, the existing crew often covers the gap with overtime. The relevant cost for vacancy planning is first the premium portion, the extra paid above the regular rate for overtime hours. Counting only the premium keeps this piece honest, because the regular portion would have been paid to someone doing the work in regular hours in a fully staffed plan.

Describe it as a framework like this: number of crew members covering, multiplied by overtime hours per person per week, multiplied by weeks vacant, multiplied by the premium per overtime hour under your terms. Premium structures vary by workplace and agreement, so use the premium that actually applies to your crew.

Watch the second order effects as well. Sustained overtime raises fatigue, safety risk, error and rework risk, and turnover risk among the very people you can least afford to lose. Those effects are real even when they are hard to price. Note them beside the dollar figure when you review the stack.

2. Project delay exposure

An understaffed crew may finish later, start the next job later, or turn down work it could have taken. Delay exposure is the financial consequence that follows from your contracts and your schedule. It can include contractual delay costs where a contract provides for them, extended site and equipment costs, rescheduling costs with other trades and suppliers, and margin lost on work declined or deferred.

Framework: identify the specific projects affected, name how many weeks of delay are realistically attributable to the vacancy, and attach only the cost consequence you can explain from the contract or the schedule. Do not inflate this line with general frustration. A defensible small number helps decisions more than a large guessed number.

3. Recruiting and onboarding time

Filling a trades role takes skilled peoples time. Someone writes and places the posting, screens applicants, checks credentials and references, interviews, and decides. After an offer, someone completes paperwork, safety orientation, system access, tool and vehicle setup, and supervised ramp up until the new hire is fully productive.

Framework: list each task, who does it, and how many hours it takes them, multiplied by that persons cost per hour to the business. Add direct costs you actually pay, such as a posting fee or a credential check, at the amount on the invoice or quote. Count onboarding time separately from recruiting time, and note time to full productivity as a schedule fact beside the cost.

Add the three pieces together and you have a vacancy cost estimate you can defend in a management conversation and compare against options: adjusting the offer, broadening the search, using a temporary placement, training an apprentice into a longer term plan, or re sequencing work.

Estimate your own stack in one place here: Estimate your vacancy cost

Worked example, with labelled example assumptions

The example below is for arithmetic practice only. Every input is an example assumption, not a rate, fee, or average presented as fact. Replace each assumption with your own verified figure.

Example assumptions: Example vacancy length: 8 weeks Example crew covering the gap: 4 workers Example overtime per worker: 5 hours per week Example journeyperson rate: 40 dollars per hour Example overtime premium: 0.5 of the regular rate as the extra premium portion, so the premium is 20 dollars per overtime hour in this example Example recruiting time: 12 hours of manager time at an example cost of 50 dollars per hour Example direct posting cost: 400 dollars as an example amount Example onboarding time: 20 hours of trainer time at an example cost of 40 dollars per hour, plus 5 hours of administration time at an example cost of 35 dollars per hour Example delay exposure: 500 dollars per week for 2 weeks attributable to the vacancy in this example, for a delay line based on that stated assumption only

Step by step calculation:

Overtime hours in total: 4 workers multiplied by 5 hours per week equals 20 overtime hours per week. 20 hours per week multiplied by 8 weeks equals 160 overtime hours.

Overtime premium cost: 40 dollars multiplied by 0.5 equals 20 dollars premium per hour. 160 hours multiplied by 20 dollars equals 3,200 dollars.

Recruiting time cost: 12 hours multiplied by 50 dollars equals 600 dollars. Add the example direct posting cost: 600 dollars plus 400 dollars equals 1,000 dollars for the recruiting piece.

Onboarding time cost: Trainer: 20 hours multiplied by 40 dollars equals 800 dollars. Administration: 5 hours multiplied by 35 dollars equals 175 dollars. Onboarding total: 800 dollars plus 175 dollars equals 975 dollars.

Delay exposure: 500 dollars per week multiplied by 2 weeks equals 1,000 dollars.

Total example vacancy cost: Step 1: 3,200 dollars overtime premium plus 1,000 dollars recruiting equals 4,200 dollars. Step 2: 4,200 dollars plus 975 dollars onboarding equals 5,175 dollars. Step 3: 5,175 dollars plus 1,000 dollars delay exposure equals 6,175 dollars.

Total under these example assumptions only: 6,175 dollars for an 8 week vacancy.

Use the example to see the method, not to budget your business. Your crew size, premium, timeline, and delay position will move the total substantially, in either direction. A longer vacancy does not just repeat the same week. Overtime tolerance falls and delay exposure can grow, which is why updating the estimate matters.

Run the estimator with your inputs and your current week count here: Run the employer vacancy cost estimator

Deciding what to do with the number

A vacancy cost estimate supports three honest conversations.

First, the offer conversation. If the stack is growing by a visible amount each week, a modest improvement to the offer or the schedule may cost less than another month of vacancy. Do that comparison with numbers on both sides.

Second, the workload conversation. If delay exposure is the largest line, re sequencing work, renegotiating a start date early, or declining a marginal job may protect margin and reputation better than pushing a tired crew harder.

Third, the pipeline conversation. A single vacancy is an event. Repeated vacancies in the same trade are a system signal. Apprentice intake, retention of mid level staff, and relationships with local training providers are slow fixes, and they are the fixes that prevent the next stack from forming.

For the year long pattern behind a single vacancy: The IronPath Employer Playbook includes a monthly vacancy ledger, a five year pipeline planner, and a spreadsheet companion that runs on your own figures. CAD 69.

Sources and figures note

This framework is a planning method, not a statistical claim. Wage rates, overtime terms, and contract terms come from your employment agreements, any applicable collective agreement, and your project contracts. Apprenticeship and credential context for hiring comes from provincial apprenticeship authorities such as Skilled Trades Ontario and Alberta Apprenticeship and Industry Training, and from the Red Seal Program for interprovincial standards in many trades. No figure in the worked example is presented as a fact, average, or rate for any trade or region. All example inputs are labelled as assumptions so the arithmetic can be followed and replaced.