Trades & Construction Accounting in Houston, TX:
Build the Gulf Coast on Books You Can Trust

Houston builds at industrial scale. Alongside the subdivisions and commercial towers, the Gulf Coast runs on refinery and petrochemical work, plant expansions, and the maintenance and turnaround contracts that keep those facilities running — plus the mechanical, electrical, instrumentation, civil, and specialty trades that serve all of it. It's a deep, lucrative market for a contractor. It's also one where the accounting is unforgiving, because construction is its own discipline and Texas's contractor sales-tax rules are among the most misread in the state.

The rule that costs Houston contractors the most: whether you write a job as lump-sum or separated changes who owes sales tax on your materials, and whether the work is new construction or repair/maintenance — the difference between building a new unit and servicing an existing plant — changes the treatment again. Miss it and you overpay on every job or carry a liability into an audit. Add job costing on big multi-crew jobs, WIP, retainage, certified payroll, and heavy equipment, and clean books here are a specialty. This guide covers all of it, delivered remotely.

By Jason Anderson — Co-Founder, 406 Consulting Group. Big-firm-trained accountant serving contractors and industrial trades across the Mountain West and Southwest — job costing, WIP, and the Texas contractor rules that decide whether a bid holds its margin.

Contractor books run on a different clock than most businesses. Revenue lands in progress draws stretched across months-long jobs; costs sprawl across craft labor, materials, subs, rentals, and owned equipment that all have to be traced to the right project and cost code; you invoice partway through and the owner withholds retainage; scope shifts through change orders; and the profit on a big job can vanish in a single underestimated line. Ordinary bookkeeping — categorize the bank feed, reconcile once a quarter — can't tell an industrial or commercial contractor the things that actually matter: is this job tracking to its estimate, and is the company as a whole making money or just moving cash?

In Texas the discipline collides with contractor tax rules most builders were never walked through. Whether a contract is written lump-sum or separated changes who remits sales tax on materials; whether the work is a new build or maintenance on an existing facility changes it again; heavy equipment gets taxed yearly as business personal property; and public and federal jobs bring certified-payroll duties. All of it lives in the books. For a Houston contractor working the plants, the port, and the commercial market, getting it right is the line between growth that builds equity and growth that quietly drains the bank account.

Start with the tax picture — Texas's contractor rules are where Houston builders quietly leak the most money.

No state income tax is a genuine edge, but a Houston contractor still juggles several taxes — and the construction sales-tax rules are the ones with teeth:

Confirm current rules with the Texas Comptroller — construction sales tax has enough moving parts that it's worth setting up with a pro. Here's the piece that catches the most contractors.

Here's the distinction that decides who hands Texas the sales tax on your materials — and it comes down to how the contract is written. Quote a job as a single all-in price (a lump-sum contract) and Texas generally treats you as the end consumer of the materials: you pay the tax when you buy them and you don't bill the customer a separate tax line. Break the contract out with materials and labor stated separately (a separated contract) and you're generally treated as a reseller of the materials: you buy them tax-free with a resale certificate but then collect and remit sales tax from the customer on the materials portion.

On a large industrial or commercial job the dollars here are not trivial, and picking a contract format without understanding the tax consequence is how contractors either pad every bid with tax they didn't need to eat or fail to collect tax they'll later owe out of pocket — because an under-collection is the contractor's problem in an audit, not the customer's. The right format depends on your markup, your customer, and the work, and whichever you use has to flow consistently through how you buy, bill, and book each job. It's the first thing we straighten out for a construction client.

The second axis is the type of work — and in Houston this one is everywhere, because so much of the market isn't new construction at all: it's keeping existing plants, facilities, and buildings running. Texas treats new construction differently from repair, remodeling, restoration, and maintenance, and it further separates residential from nonresidential property. That matters intensely for the industrial and commercial contractors who dominate the Gulf Coast, because a refinery turnaround, a unit repair, or a facility-maintenance contract sits on the repair/maintenance side of the line, while a new unit or a ground-up build sits on the other — and the sales-tax treatment isn't the same.

For a contractor whose work spans new capital projects, maintenance contracts, and remodels — which describes most established Houston firms — the correct treatment can shift from job to job. The books have to record what kind of work each job is so the tax is applied right and consistently across a mixed backlog. It's detailed, it's easy to fumble, and it's precisely what an out-of-market bookkeeper misses. Confirm the specifics with the Comptroller or a professional, because on plant-scale work these classifications carry real dollars.

Between contract format and work type, Texas construction sales tax is a genuine specialty — and the number-one reason a Houston builder wants a construction-literate accountant rather than a generalist.

The bigger the job, the more it hurts to fly blind on cost. On a multi-crew industrial or commercial project, dozens of workers, several trades, equipment, and a river of material invoices all hit at once — and without job costing that codes every one of those dollars to the right project and phase, you won't know a job is bleeding until it's already lost money. Done right, job costing shows the live margin on each project against its estimate, so you can catch an overrun while there's still time to manage it and bid the next one from real history instead of a hopeful guess.

It's also the base layer everything else in construction accounting stands on: no accurate WIP schedule, no correct progress billing, and no honest read on a change order without job-level costs underneath. For a Houston contractor scaling into larger contracts, disciplined job costing is what lets the company grow without the margin quietly slipping through the cracks.

It's the same principle our contractor unit economics piece is built on — at industrial scale, knowing your real cost per job and per crew is what keeps a big backlog profitable.

Jobs that span months need accounting a generic ledger can't provide. A work-in-progress (WIP) schedule lines up each open job's costs, billings, and estimated cost-to-complete so you can see whether you're over- or under-billed — bill ahead of the work and the extra cash can masquerade as profit you've in fact already spent; bill behind it and you're floating the owner's project out of your own pocket. Percentage-of-completion recognizes revenue as the job actually earns it rather than dumping it all at closeout, so each month's statements tell the truth.

Layer on retainage — the 5–10% an owner typically holds until the job closes, which parks a chunk of your money and has to be tracked as its own receivable — and change orders, which on plant and commercial work can rival the base contract in value and must be captured and billed before the work is done and forgotten. Together these turn a sprawling, multi-job backlog into statements you, your surety, and your bank can actually rely on.

As the jobs and the backlog grow, this is where a controller or CFO function pays for itself — the WIP schedule is the contractor's single most important report.

Texas keeps payroll relatively light — no state income-tax withholding — but Houston's scale adds its own demands. Big craft workforces mean payroll that has to feed job costing by worker, trade, and cost code, plus a heavy roster of subcontractors and 1099s where worker classification has to be right. On federally funded work, the Davis-Bacon Act requires paying set prevailing wage rates and filing certified payroll reports for every worker; some public projects carry their own prevailing-wage terms. On a large industrial or public job, botched certified payroll can freeze your payments, so it's not something to wing.

Workers' compensation adds another wrinkle: Texas is unusual in that it's technically optional, but in energy and heavy construction the plant owners and general contractors you work for almost always require coverage — and the class codes on high-risk craft work are significant. Set up properly, payroll becomes a clean feed into your job costs instead of a monthly scramble.

Our payroll work — certified payroll on public jobs included — keeps this running quietly in the background.

Heavy contractors carry heavy iron, and in Texas that gear shows up twice in the books. First, the business personal property (BPP) tax: cranes, rigs, trucks, trailers, and tooling are generally subject to an annual county rendition where they're valued and taxed — for an equipment-intensive Houston contractor this is a real yearly number, so a clean, current fixed-asset schedule keeps you from over-reporting and paying tax on machines you've sold or scrapped. Second, depreciation: Section 179 and bonus depreciation can pull a large share of an equipment purchase into the year you buy it, which is powerful when you're expanding a fleet — though it's worth timing against your multi-year income rather than deducting on autopilot.

That same fixed-asset detail should feed job costing, because equipment hours belong on the jobs that used them, and a machine sitting idle in the yard is one of the least-visible drains on a contractor's margin. Track what you own, what it costs to run, and where it's earning, and the equipment stops being a blind spot.

The depreciation-timing and margin-tax planning sit in the Houston tax guide; the tracking that makes both work starts in the books.

The bigger the jobs, the more bonding governs what you can even bid — and a surety sizes your bonding program straight off the credibility of your financial statements and WIP schedule. On plant and public work, single bonds can run large, and your aggregate program caps how much work you can carry at once. Construction-grade books aren't paperwork here; they're the gate to the next tier of contracts. A strong contractor with weak books gets held back because the surety can't underwrite the risk, while one with a clean WIP and solid statements keeps getting more capacity.

And big jobs are ferociously working-capital hungry: you carry payroll for large crews, mobilize equipment, and buy materials weeks or months before a draw lands, while retainage sits unpaid until the end. It's entirely possible to be booking profit and still be starved for cash mid-project. Tracking cash, receivables, retainage, and a forward forecast is what keeps a growing contractor solvent — and having read financials from the lender's side of the table, we help you line up credit before the crunch and present the company the way a bank or surety needs to see it. Our loan-readiness work is built for exactly that.

Bonding capacity and working capital both come back to one thing: financials strong enough to earn a lender's and a surety's confidence.

A short list of avoidable errors accounts for most of the financial pain among Houston contractors.

Each one is a setup-and-habit problem — and each disappears once the books are built for Texas construction and run on a monthly rhythm.

A contractor's world is the field, the plant gate, and the truck — not a chair in an accountant's lobby — so remote bookkeeping fits the way you already operate. What decides whether it works is expertise, not address: does your accountant understand construction and Texas — job costing and WIP, the lump-sum-versus-separated rules, new-versus-repair treatment, certified payroll, and bonding at scale? An accountant across town who's never assembled a WIP schedule is the real risk; a specialist who does it daily is the safeguard.

We run the way a modern contractor runs: cloud accounting and job-costing software, receipts and time captured from the field, connected bank feeds, and a dependable monthly close — Texas-literate construction books without you leaving the jobsite. Whether you're working the Ship Channel plants, building commercial across the metro, or running crews out past Harris County, the service is the same: responsive and construction-fluent.

Expertise in construction and Texas is the variable that counts — not how close the office sits to the job.

Getting a Houston contractor's books in order is three steps.

Not sure where your books stand? Our Financial Maturity Assessment maps it out in about eight minutes.

FAQ: Houston Construction Accounting