In-House Estimator vs Outsourced Estimating: The Real Cost Comparison

There comes a point in a growing firm when estimating stops fitting into the evenings. The work is there, but pricing it properly takes hours the owner no longer has. That is usually when the question comes up: do you hire an in-house estimator, or outsource the estimating per project? Either way the decision turns on cost, so the place to start is what a construction estimator’s salary adds up to once everything is counted.

What an in-house estimator really costs

Start with the salary. A construction estimator in the UK earns around £48,600 a year on average, and an experienced one in a city will cost more. That figure is only the start. On top of the salary you pay employer’s National Insurance at 15% on everything above £5,000, along with pension contributions, holiday, sick pay, and the desk, software and phone that come with an employee. Once you add all of that, an estimator on £48,600 costs the business closer to £60,000 a year.

Hiring also has costs before anyone prices a single job. Advertising the role, sifting applications and interviewing take the owner’s time, and a new estimator needs a few months to learn how you work and what your typical jobs involve. Until they are up to speed, someone senior is checking their numbers.

There is a less obvious cost on top of all that. An in-house estimator is a fixed expense whether you have ten jobs to price in a given month or only two. In a firm with steady work that is fine. In one whose workload rises and falls, you carry that salary through the quiet spells, when the estimating that justified the hire has dried up.

What outsourcing costs instead

Outsourcing works the other way round. Instead of a salary you pay per project, so the cost only appears when you have work to price. For a firm with an uneven pipeline, that turns a fixed overhead into a variable one you can turn on and off as the work comes and goes. There is nothing to pay in a quiet month.

The trade-off is that you give up having someone in the office who knows every job inside out. A good outsourced service closes most of that gap by pricing from live merchant rates and talking the job through with you first. It suits firms that would rather pay for estimating by the project than carry a salary on the payroll all year for work that is not always there. Turnaround is worth checking too. A service that prices a job in a few working days lets you get quotes out while the enquiry is still warm, which matters as much for winning the work as the price on the estimate.

Which one makes sense for you

The right choice depends less on how big you are than on how steady your work is. A firm with a full, predictable pipeline and enough jobs to keep an estimator busy every week will normally get value from hiring one. The salary is easier to justify when the person is fully occupied and part of the team, sitting in on jobs and learning the business as they go.

A firm whose workload is lumpy, or that is not yet big enough to keep an estimator busy, is often better outsourcing until the volume is there. You get professional estimates without committing to a salary through the slow months, and you can bring it in-house later when the numbers change. Some firms run both, keeping an estimator for the day-to-day and outsourcing the overflow when a big job comes in and the deadlines stack up. It helps to put rough numbers on it. A firm that prices, say, thirty or forty jobs a year rarely keeps a full-time estimator busy, so that £60,000 works out expensive per estimate. A firm pricing several jobs a week is in the opposite position, where a salary spread across that many estimates is cheaper than paying for each one.

Where the estimate itself comes in

Whichever way you go, the aim is to stop estimating eating into the hours you should spend running the firm or on site. The NOW Report 2026 found that quoting and the admin around it already take the average tradesperson over five hours a week, usually in the evenings. For a growing firm that is the cost of doing nothing, and it is the cost both hiring and outsourcing are meant to remove. Every hour spent pricing in the evening is an hour not spent winning the next job or with your family.

If you are weighing the two, our estimating service is the outsourced option here. You send the plans, ex-trade estimators price the whole job at live Jewson and JP Corry rates against your trade account, and a full estimate comes back without adding to the payroll. Upload your project and get a quote if you want to see how it works on a live job before you decide.