What's a Reasonable Margin on Texas Public Works Bids?

Public work pays slow and audits hard, which means the margins are different from private. Here's what experienced Texas contractors carry for overhead and profit by trade, why "low bid" doesn't mean "lowest cost," and the three line items that actually decide profitability.

Margin on public work in Texas isn't really about the gross-profit percentage you put on top of cost. It's about everything you have to absorb that you don't on private work. The contractors who think they're competitive on a 10% OH&P on city work are often the contractors who lose money on it, because they're not accounting for the real cost of doing business with a municipality.

The three line items that decide profitability

1. Cost of slow money

Pay-when-paid clauses, 30-day prompt-payment windows (which sometimes stretch to 60), and 5%–10% retainage held until substantial completion all mean your money cycle on a public job is double or triple what it is on private. If your weighted-average cost of capital is 8% and you carry a job's working capital for 120 days vs. 45 days, you're absorbing about 1.7% of contract value just on financing the work. That's not a margin add-on. That's a cost subtraction from your stated OH&P.

If you're not sure how the payment timing actually works, our Prompt Payment Act walkthrough covers Chapter 2251 in plain language.

2. Documentation overhead

Public work requires substantially more paperwork than private. Certified payrolls if it's a Davis-Bacon job or prevailing-wage Texas job. Submittals, RFIs, change orders on the city's exact form. Schedule updates. M/WBE compliance reports. Substantial-completion punchlist documentation. Bond and insurance certificates renewed annually. If you're a $5M/year contractor, this is probably 20–30 hours per month of admin time that doesn't exist on a private remodel. Cost that out — that's another 1–2% of revenue.

3. Audit and recovery risk

City auditors come back two or three years later and ask questions. If they decide a unit price was misapplied, a quantity overstated, or a change order improperly approved, they have the right to claim back. Surety bonds protect against non-performance, not against post-completion audit dispute. The contractors who've been through one of these for the first time are almost always astonished at how much they have to give back. Budget 0.5–1% of revenue as a reserve for audit risk on municipal work.

Add those up and you're carrying 3–5% of revenue in costs that don't exist on equivalent private work. That has to come out of your stated OH&P before you book profit.

Typical OH&P stack by trade, in Texas, 2026

These are rough industry numbers for public-works bids, observed from contractor conversations and published RFP responses. Your numbers will vary based on your overhead structure and bonding capacity.

• General construction (vertical): 12–18% OH&P on the bid total. The biggest GCs that win city civic buildings work in the 10–13% range and make it up on volume.
• Heavy civil / paving: 8–15% OH&P. TxDOT-experienced firms tend to run 10–12% and dial it tight.
• MEP (mechanical / electrical / plumbing): 15–22% OH&P. The complexity of MEP subs justifies a higher margin and most cities accept it.
• Roofing: 18–25% OH&P. Texas weather risk and warranty exposure push roofers higher.
• HVAC: 18–22% OH&P. Includes warranty and commissioning costs.
• Painting & coatings: 20–25% OH&P. Labor-heavy, weather-sensitive.
• Specialty (fencing, landscape, janitorial): 25–35% OH&P. Lower contract value per job, so absolute margin must come from higher percentage.

These numbers are what gets bid. Whether they translate to those margins after the three cost items above is the contractor's actual job.

Why "low bid" doesn't mean "lowest cost"

Texas Local Govt Code §252.043 says cities must award to the "lowest responsible bidder" on competitive sealed bids. "Responsible" gives the city latitude, but for trade work it's mostly low-bid wins. That means contractors who bid right at their breakeven (because they need the work or are mispricing the documentation overhead) win, and contractors who price the real cost lose.

The contractors who bid healthy margins consistently are the ones who:

• Have enough work pipeline that they can walk away from underpriced jobs
• Specialize in trades or geographies where there are fewer qualified competitors
• Develop relationships with primes who do CMAR (construction-manager-at-risk) and design-build, where price isn't the only selection criterion
• Pursue cooperative purchasing contracts (BuyBoard, TIPS, Sourcewell) where the contract is awarded based on capacity, not lowest individual project bid

The strategic margin question

Should you take a 4% gross-margin job to keep the crew billable? Maybe. The right answer is: only if the job doesn't displace capacity from a 15% gross-margin job. The mistake is taking the 4% job and then having no surety capacity or crew availability when the 15% job hits.

This is why pipeline matters more than bid count. Seeing all the work that's open in the state in your trade — and being able to filter for the projects that fit your bonding capacity, your bid window, and your margin floor — is what makes the strategic call possible. The contractors who win healthy margins on municipal work are usually the ones with the best forward visibility into the funnel.

This is, not coincidentally, what MuniBidBoard exists to do — give you that pipeline visibility. Browse the current Texas municipal pipeline to see what's open in your trade right now.