ONE PROBLEM, IN DETAIL

BMP MATERIAL COST TRACKING BY SITE: PORTFOLIO ECONOMICS

QUICK ANSWER

A SWPPP contractor's book is dozens of small recurring sites: inspection routes, BMP maintenance, and materials per site, against per-site contract pricing. Route density, drive time, and BMP material burn decide margin. Per-site job costing turned $24K of net into $1,105,000 at a 30 percent margin on $5.2M of revenue.

This page covers one problem. The full picture for this trade, including the other places margin leaks, is on the swppp / erosion control operating system page.

BY JOSH LUEBKERPublished 2026-08-06Updated 2026-08-06
WHAT BREAKS

WHERE THE MONEY GOES.

Portfolio economics (cost per site is the whole business)

Covered in full in the quick answer above. The sourced numbers and what controls it are below.

WHAT THE NUMBERS SAY

THE COST, SOURCED.

Proof anchor

a verified erosion control client, $5.2M erosion control, $24K to $1,105,000 net, 30 percent margin. (Verified, CONTROL Ch8)

WHAT THIS TRADE SHOULD EARN

THE NUMBER TO MEASURE IT AGAINST.

SWPPP / Erosion Control contractors run about % net profit at $1M to $5M, rising to roughly 13% at $5M to $10M. The CFOS target at $1M to $5M is11%, set at 10 percent before taxes or 3.5 points better than your trade's average at your revenue, whichever is higher. A problem like this one lives in the distance between those two figures rather than in a loss on any single job.

Gross margin over the same bands runs % to 26%, against a CFOS target of 11%.

Full swppp / erosion control benchmark bands by revenue

WHAT CONTROLS IT

THE SYSTEM THAT FIXES THIS.

Job Profitability System

Cost codes built against the estimate, so a job can be read while it runs.

How the Job Profitability System works

COMMON QUESTIONS

FREQUENTLY ASKED.

The permit holder wears the fine, and at up to $56,460 per day per violation plus stop-work exposure, the fight afterward is about whose documentation failed. A SWPPP contractor with complete inspection logs, corrective-action records, and photo trails is the client's defense; one without them is the defendant's co-star. Documentation is the product.
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.

IS THIS COSTING YOU MORE THAN YOU THINK?

Bring one swppp / erosion control job and your last full year. We will show you what this is worth in dollars before we talk about working together.

You don't hire a CFO because it's safe, you do it because the real risk isn't having one.
Book a 20 minute diagnostic

20 minutes. No sales pressure. We will tell you exactly what's broken before we talk about anything else.

OR START WITH THE WORKBOOKS. NO CALL NEEDED.