BACKLOG AND WORKING CAPITAL

CONSTRUCTION BACKLOG CASH REQUIREMENTS.

QUICK ANSWER

Backlog isn't the same thing as working capital. A $4M backlog of signed contracts is a commitment to perform work, not cash in the bank. Before the first pay app clears on any of those contracts, you're paying crews, buying material, deploying equipment, and running overhead. The requirement is weekly cash burn times the mobilization period, and it has to be compared to what you have available before you sign.

Most subcontractors sign contracts based on whether they want the work and can perform it. The working capital question, meaning how much cash the project consumes before first payment and whether that cash exists, rarely gets asked before signing. It's three lines of arithmetic and it takes ten minutes. Skipping it's how a contractor wins the job that closes the business, and it's why a smaller backlog with staggered starts is often safer than a bigger one where everything mobilizes in the same month.

BY JOSH LUEBKERPublished 2026-08-06Updated 2026-08-07
THE DEFINITION

WHAT IT MEANS.

A backlog cash requirement is the amount of working capital a signed contract consumes before its first payment reaches the bank, calculated as weekly cash burn multiplied by the mobilization period.

There are three numbers to pin down before you sign anything. The mobilization period is the time from first day on site to first payment received. Weekly cash burn on a project is labor cost per week plus weekly material deliveries plus equipment charges plus your pro-rated weekly overhead allocation. Available working capital is cash on hand plus available LOC minus committed draws on other active projects.

THE CALCULATION

THREE STEPS BEFORE YOU SIGN.

01

Step 01: identify the mobilization period

The mobilization period is the time from your first day on site to first payment received. On a commercial project with monthly billing and a 45-day pay-when-paid cycle, that's roughly 75 days: 30 days of work before first billing plus 45 days for the GC to pay. On a public project with a 90-day pay cycle, it's 120 days.

02

Step 02: calculate weekly cash burn

Weekly cash burn is labor cost per week plus weekly material deliveries plus equipment charges plus your pro-rated weekly overhead allocation. Multiply that weekly burn by the number of weeks in the mobilization period, and the result is the total cash requirement before first payment. That total is what the contract is really asking you for.

03

Step 03: compare it to available working capital

Available working capital is cash on hand plus available LOC minus committed draws on other active projects. If Project A needs $180,000 in mobilization cash and your available working capital is $220,000, you can fund it with $40,000 to spare. If Project A needs $180,000 and three other projects are already drawing on $200,000 of your $250,000 LOC, you can't fund it without collecting outstanding AR or securing additional credit before mobilization.

THE ARITHMETIC

WHAT IT LOOKS LIKE IN DOLLARS.

A $600K civil project

Weekly labor cost fully burdened is $14,500, weekly material deliveries average $8,200 across weeks 1 to 8, equipment charges run $3,800 per week, and the overhead allocation is $4,600 per week. That's a weekly cash burn of $31,100. Over a 10-week mobilization period, the working capital required is $311,000. If your available LOC plus cash is $280,000, you have a $31,000 shortfall before the crew ever sets foot on the site.

THE BACKLOG STACK

WHEN THREE JOBS START THE SAME MONTH.

Compare the peak, because that is the week the money has to be there

The analysis gets harder when multiple projects mobilize in the same 30-day window. Each project has its own peak working capital requirement and its own mobilization period, and the peak of the combined requirement, when all of them are in early mobilization at the same time, is what has to be compared to available resources. Comparing each project on its own is how a contractor approves three jobs the balance sheet can only fund one of.

Map every project to its mobilization date and peak requirement

Every active and upcoming project gets mapped to its mobilization date and its peak working capital requirement. That map is what makes the stack visible before it becomes a month you can't fund. It takes one spreadsheet, and it changes which jobs you chase.

Find the worst four-week window

Identify the 4-week window where the combined requirement is highest. Compare that peak to available LOC plus cash minus committed draws. That single comparison is the whole decision.

If the peak exceeds what you have, change the plan

Stagger the project starts, accelerate AR collection to free cash before the new project begins, or arrange additional credit before mobilization. Any of the three works, and doing none of them is also a choice. The one option that doesn't exist is hoping the timing works itself out.

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PRICING

FLAT MONTHLY FEE. NO SURPRISES.

Three tiers, priced by your trailing twelve month revenue. Which one you're in depends on how much of the work you want off your desk. No hourly billing, no payroll, and no add-ons.

Pricing

Last 12 months revenueMonthly fee
Up to $1M$1,900 to $2,900
$1M to $3.5M$2,600 to $3,900
$3.5M to $6.5M$3,800 to $5,700
$6.5M to $9.5M$5,100 to $7,100
$9.5M to $12.5M$6,100 to $8,500
$12.5M to $15.5M$7,400 to $11,000
$15.5M to $18.5M$9,400 to $13,500
$18.5M+Quoted individually

Range reflects the three tiers below. Which one you're in depends on how much of the work you want off your desk. No payroll. No hidden line items.

Core

You stop guessing.

You get the CFO work. Job costing built against the way you estimate, a 13 week cash forecast, monthly WIP, and a meeting every month that ends in decisions rather than a report.

Your bookkeeper keeps doing the books.

Executive

You stop touching the books.

Everything in Core, and we run the bookkeeping and the controllership as well. Nobody in your office is answering coding questions or chasing a reconciliation at month end.

We do the books. No payroll.

Strategic

Every job shows its margin while it's still running.

Everything in Executive, plus the job costing and WIP platform set up, loaded with your cost codes, and managed for you every month. You never have to learn it.

We do the job costing.

COMMON QUESTIONS

FREQUENTLY ASKED.

A healthy backlog is 3 to 6 months of revenue in signed contracts with manageable working capital requirements, so for a $4M subcontractor that's $1M to $2M in signed backlog. The dollar amount counts less than the working capital profile. $1M in backlog that requires $600K in mobilization cash is more dangerous than $2M in backlog where projects are staggered and each one requires $80,000 to mobilize.
There are four options in order of preference. Negotiate a mobilization payment into the contract so the GC pays you for mobilization costs before work begins, increase your LOC before mobilization starts, accelerate AR collection on current projects to free up cash before the new project starts, or stagger the project start to line up with when existing project collections come in. MCA loans are a fifth option, and they're always the worst option.
Yes. The 24-month cash forecast includes upcoming project starts with their estimated weekly burn and expected first payment date. The peak working capital requirement of the full backlog is visible before any individual project mobilizes.
Three tiers, and which one you are in depends on how much of the work you want off your desk. Core is where you stop guessing: job costing built against the way you estimate, a 13 week cash forecast, monthly WIP, and a monthly meeting that ends in decisions, while your bookkeeper keeps doing the books. Executive is where you stop touching the books, because we run the bookkeeping and the controllership as well. Strategic is where every job shows its margin while it is still running, because the job costing and WIP platform is set up and managed for you. No payroll. No scope gaps.
Sixty days. We migrate your books back to the start of your last taxable year, set up ControlQore, and build your job costing structure from scratch. Fully operational in two months.
WHAT THIS TIES INTO
Josh Luebker, The Construction CFO
Josh Luebker
FRACTIONAL CFO · THE CONSTRUCTION CFO

Former commercial project manager and master electrician: 150+ projects worth $2.1B combined, from $50,000 to $300M. Now fractional CFO to commercial subcontractors.

HOW MUCH CASH DOES YOUR SIGNED BACKLOG NEED BEFORE IT PAYS?

Bring your backlog list and your current LOC position. We will run the burn math on the next three starts and tell you which month is the problem.

You don't hire a CFO because it's safe, you do it because the real risk isn't having one.
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