When to hire an estimator: signs and the math

Signs you have outgrown owner estimating

• You pass on bids you want because there is no time to price them.
• Your hit rate swings with how much time you had, which suggests the price is set by the hurry, not the job.
• Job cost reports keep disagreeing with the estimate in the same places. Nobody has time to feed actual costs back into the next estimate.
• Addenda and scope gaps show up after award, in buyout, more than once a year.
• The owner is not selling or managing. Every hour spent on takeoff is an hour not spent with clients, the surety or the jobs.

One sign alone is a busy month. Three or four, month after month, is a structure problem.

What the hire has to earn

An estimator's salary, payroll burden, software and equipment are company overhead. They have to be paid from gross profit. All numbers below are invented.

• Full cost of the estimator for a year: $110,000
• Company gross margin (revenue less direct job cost, as a share of revenue): 12%

Extra revenue needed to cover the hire: 110,000 / 0.12 = $916,667. Check: 916,667 x 0.12 = 110,000.

That is the break-even for the hire, before it adds any profit. The free break-even calculator works the same idea for your whole overhead budget.

Turn it into bids. Suppose the company's jobs average $500,000 and it wins about one bid in six.

• Jobs needed: 916,667 / 500,000 = 1.83, so 2 jobs a year. Check: 2 x 500,000 = 1,000,000, which covers 916,667.
• Bids needed at one in six: 2 x 6 = 12 bids a year, about one a month more than you send now.

If an estimator can price a dozen more bids a year than the owner can, the hire pays for itself on volume alone. Better pricing, from feeding job costs back into the estimates, is on top of that.

What it does to your overhead rate

Overhead is usually recovered as a rate on direct cost. Adding the estimator raises that rate unless volume grows.

• Before: overhead $600,000 on direct cost $5,000,000 = 12%. Check: 5,000,000 x 0.12 = 600,000.
• After, same volume: 710,000 / 5,000,000 = 14.2%
• After, with volume up to $6,000,000: 710,000 / 6,000,000 = about 11.8%. Check: 6,000,000 x 0.118 = 708,000, within rounding.

In the first year you may need to bid at the higher rate while volume catches up, or accept a thinner year. The free overhead rate calculator runs the rate and a sample bid for your own figures. The job costing and overhead guide explains why the rate moves with volume.

Steps in between

A full-time hire is not the only answer.

• A freelance estimator by the bid. You pay only for what you send out. Good for testing whether more bids win more work.
• A takeoff service. Quantities from someone else, pricing and markup by you. It saves the slowest part.
• Train a project manager. A PM who estimates the jobs they will run tends to price them realistically. The risk is that bids slip when jobs are busy.
• Narrow what you bid. Sometimes the fix is fewer bids, chosen better.

What the owner should keep

Whoever does the takeoff, the owner usually keeps three things: the decision to bid, the final review of scope against the documents, and the markup. Markup is a business decision about risk, competition and backlog, not an estimating task. If you set it as a margin target, convert it correctly; markup vs margin shows how.

Where this sits for the exam

The bulletin lists subject areas only. Our reading puts estimating, overhead, break-even and markup under Procurement and Contracting Requirements, the largest area on the exam. Expect short arithmetic: a rate, a break-even, a markup turned into a margin.

Run your own numbers

Take the free check. It needs no signup and explains every answer, including the arithmetic. For the Procurement and Contracting lesson and practice questions with every step worked, see the plans.

Sources

• PSI Candidate Information Bulletin 1458, content outline, updated 7 Jul 2026. Retrieved 5 Nov 2026.
• All figures are invented and were worked twice. They are not salary or market data.

FAQ

How much new revenue does an estimator need to bring in?

Divide the estimator's full yearly cost by your gross margin. At an invented $110,000 and 12%, that is about $916,667 of added revenue just to break even.

Is an estimator overhead or a job cost?

Usually overhead, because estimating serves every bid, won or lost, not one job.

Should the estimator set the markup?

Usually the owner keeps the markup decision, because it depends on risk, competition and backlog.