INTERIORS & FINISH CLUSTER · CFOS TRADE OPERATING SYSTEM

WHY INTERIOR CONTRACTORS LOSE MARGIN WITHOUT KNOWING IT.

QUICK ANSWER

Interior margin is lost to three specific things: the reimbursement float, the work-letter seam, and the lease-date vise. Interior subcontractors at $1M to $5M run 22 percent gross and 5.5 percent net, against CFOS targets at $1M to $5M of 22 percent gross and 10 percent net. All three are measurable, and all three are invisible without job costing that reads against the estimate.

Interior contractors at $1M to $5M net 5.5 percent, rising to 8 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. The distance between the trade average and the CFOS target isn't a pricing problem in this trade. It sits in the three mechanisms below, each of which moves margin without appearing as a failure on any single job. TI money flows landlord-to-tenant-to-contractor, released 30 to 60 days after a clean draw package, sometimes only at certificate of occupancy. The contractor who builds lien waivers and invoice packages as the work happens gets the draw; the one who assembles them at month end finances the landlord's building.

BY JOSH LUEBKERPublished 2026-08-06Updated 2026-08-06
THE THREE BIG LEAKS

THE MATH BEHIND THE MISSING CASH.

LEAK 01

The Reimbursement Float

TI money flows landlord-to-tenant-to-contractor, released 30 to 60 days after a clean draw package, sometimes only at certificate of occupancy. The contractor who builds lien waivers and invoice packages as the work happens gets the draw; the one who assembles them at month end finances the landlord's building.

LEAK 02

The Work-Letter Seam

Base-building versus tenant scope lives in the work letter, not the drawings, and every unread seam (demising walls, panel upgrades, code-triggered base work) surfaces as unpaid scope. Price the letter, then the plans.

LEAK 03

The Lease-Date Vise

Rent commencement is contractual, permits take 4 to 12 weeks, switchgear takes 18 to 30, and the schedule runs backward from a date the contractor never chose. Long-lead procurement and contingency discipline are the only slack in the system. (cfos-cash-flow-cycle-system) ---

HOW CFOS FIXES IT

WHAT CHANGES IN THE FIRST 60 DAYS.

The TI float (financing the landlord's building)
The work letter is the contract that matters
Occupied-building rules (the freight elevator owns your schedule)
Compressed schedules against lease dates
Multi-trade package management (the inside GC problem)
INTERIOR BENCHMARKS
Metric$1M to $5M$5M to $10M$10M to $25M
Gross margin, industry average19%21%22%
Gross margin, CFOS target22%21%22%
Net profit, industry average6%9%11%
Net profit, CFOS target10%10%12%
Overhead, industry average13%12%11%
Overhead, CFOS target12%11%10%

Industry figures are Interior contractors' AVERAGE for each revenue band, not a floor. The CFOS net profit target is set at 10 percent before taxes or 3.5 points better than your trade's average at your revenue, whichever is higher, and the gross margin target is set at whatever gross margin produces that net profit once your overhead is paid, and never below your trade's own average. Gross minus overhead equals net on every column, so the rows tie out.

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.

What's included
COMMON QUESTIONS

FREQUENTLY ASKED.

Interior contractors at $1M to $5M net 5.5 percent on average, rising to 8 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. The trade's leaks are TI-float carrying cost nobody priced, work-letter scope seams, and building-rules friction discovered mid-project instead of bid day. Every net profit figure here is stated before taxes, the same basis CFMA reports on, so the two are directly comparable.
Landlord to tenant to contractor, backward from the work: the contractor bills the tenant, the tenant submits a draw package (paid invoices, lien waivers, completion proof) to the landlord, and reimbursement lands 30 to 60 days later, or at certificate of occupancy on tighter deals. Build the draw package as the work happens, and negotiate staged releases before signing; the float is real and someone is funding it.
The lease exhibit that defines base-building versus tenant scope, allowance mechanics, change-order rules, schedule milestones, and landlord-delay damages. Scope seams live there: demising walls, panel capacity, code-triggered base work. Price the work letter first; the drawings only show what someone thinks the letter said.
Walk the building rules before bidding: freight elevator windows, after-hours requirements, noise curfews, protection standards, approved vendors. Each is a production tax with a price; specialists carry them as line items, and generalists discover them on the tenant's schedule.
Schedule backward from the lease's rent-commencement date, order long-lead equipment on day one (switchgear alone can run 18 to 30 weeks), engage the permit jurisdiction during design, and carry the 10-to-15 percent contingency the hidden conditions in existing buildings will spend for you.
A bookkeeper records history. Draw-package discipline, work-letter scope mapping, long-lead cash planning, and trade-package buyout tracking are a control system, which is CFO work. SPM operates that financial control function for interior contractors. ---
CFOS serves commercial interior subcontractors doing $1M to $12M. Pricing starts at $1,900 per month for companies under $1M and runs to $13,500 per month at the top published band. Onboarding takes 60 days.
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.
$10.7M+
Client AR Recovered Since 2023
48
Active Trade Specializations
60 DAYS
Average Onboarding Time
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.

DO YOU KNOW YOUR TRUE MARGIN ON INTERIOR WORK?

Bring one job. We will show you the difference between what you bid and what it cost.

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.