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Code comparisons

Class code 5606 vs 5645 vs 5403: supervisor or carpenter?

The short answer

If the person ever performs manual labor or supervises hands-on at the job site, they are in a trade code — not 5606. 5606 is for supervision exercised through subordinate foremen only.

This is the most expensive three-way split in contractor workers' comp, and it turns on a question nobody asks at renewal: does this person touch tools?

Almost every small construction business has at least one person sitting in the wrong one of these three codes — usually the owner. The premium difference on a single salary can run five figures a year.

The codes side by side

CodeWhat it coversIllustrative rate
5606Contractor — Executive Supervisor / Project Manager$1.20 – $4.00
5645Carpentry — Detached One- or Two-Family Dwellings$8.00 – $25.00
5403Carpentry NOC$6.00 – $18.00

Per $100 of payroll. National illustrative ranges — your state and carrier set the actual rates.

Does this employee perform manual work or directly supervise the crew at the site?

  • No — they manage through foremen and never work with tools 5606 (Contractor — Executive Supervisor / Project Manager)

    This is the classification most often missed on owners and project managers who stopped doing field work years ago.

  • Yes, and the work is on detached one- or two-family homes 5645 (Carpentry — Detached One- or Two-Family Dwellings)

    Residential structural carpentry. Interior trim and cabinet installation is a different, cheaper code — 5437.

  • Yes, and the work is commercial or multi-family over two units 5403 (Carpentry NOC)

    Carpentry NOC is the residual code. If a more specific carpentry code fits the actual work, that one governs.

When each code applies

5606Executive supervisor / PM

  • Supervision is exercised through subordinate foremen or superintendents, not directly over the crew
  • The person performs no manual labor of any kind at the site
  • Duties are estimating, scheduling, contract administration, client management and inspection

5645Carpentry — detached 1–2 family dwellings

  • Structural carpentry on detached one- or two-family homes
  • Framing, sheathing, roof structure, decks on single-family residential work

5403Carpentry NOC

  • Carpentry that isn't covered by a more specific code — commercial buildings, multi-family over two units, general structural work
  • The catch-all when the job type doesn't fit 5645 or the interior-trim code 5437

What audits get wrong here

You overpay

The owner who stopped swinging a hammer is still coded 5645 or 5403 from the day the policy was written.

Nobody re-checks class codes when a role changes. The code follows the business's original setup, not the person's current duties.

You overpay

A full-time estimator or project manager is bundled into the governing trade code with everyone else.

The governing classification rule assigns most payroll to one code, and auditors sometimes apply it to staff who qualify for a separate classification.

You underpay — back-bill risk

A working owner who frames alongside the crew is coded 5606 because 'he's the boss'.

This one goes the other way and it bites hard: an auditor who finds tool work reclassifies the whole payroll to the trade code and back-bills for the period. Do not chase 5606 unless the tool work genuinely stopped.

Worked example

An owner who runs three crews through two foremen, quotes jobs and never works on site, on $95,000 of annual payroll.

Charged at 5645 (Carpentry — Detached One- or Two-Family Dwellings)
$7,600$23,750 / yr
Charged at 5606 (Contractor — Executive Supervisor / Project Manager)
$1,140$3,800 / yr

That is roughly $3,800 to $22,610 a year on one salary, and classification overcharges are commonly recoverable around three years back.

Illustrative only. Not a quote, and not a prediction of what your carrier will do.

How much is actually at stake

This is the largest recoverable delta in small-contractor workers' comp. The rate spread between 5606 and a residential carpentry code is commonly 3x to 15x, and it applies to a full salary — often the highest one in the company.

What settles the argument

Classification disputes are won with records, not opinions. For this one, gather:

  • An org chart showing which foremen report to this person and which crews report to those foremen
  • Job descriptions and employment agreements that state supervision-only duties in writing
  • Daily job logs or site sign-in sheets showing who performed labor on which days
  • Payroll or job-costing records allocating this person's time to management rather than production
  • Vehicle and tool assignment records — a truck stocked with tools is the first thing an auditor points at

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Frequently asked questions

Can an owner be classified 5606 if they visit job sites?
Visiting to inspect progress, meet clients or check quality is generally consistent with 5606. Directing the crew hands-on, or picking up a tool, generally is not. The distinction is supervision through foremen versus supervision of the workers themselves — and states apply it differently, so confirm with your carrier.
What if the owner works with tools only occasionally?
Occasional manual work is usually enough to disqualify 5606 for that person. Some businesses respond by splitting payroll between codes, but a split requires verifiable time records allocating hours per class — without them, the entire payroll goes to the highest-rated applicable code.
Is 5606 available in every state?
No. Eligibility rules and even availability vary by state and rating bureau, and several states are not on the NCCI system at all. Check your state's rules before assuming the code applies.
How far back can a 5606 correction be recovered?
Classification overcharges are commonly cited as recoverable around three years back, though the exact window depends on your carrier and state. It is worth asking rather than assuming the older policy periods are closed.

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ClassCheck provides self-advocacy information only. This is not legal, insurance or accounting advice, and classification rules vary by state and carrier. Terms.