SBA loans for highway, street and bridge construction: bonding, retainage and iron

Two kinds of contractor in one code

NAICS 237310 covers contractors who build and repair roads, streets, bridges, parking lots and runways: asphalt and concrete paving, milling, line striping, guardrail and sign installation, and pavement maintenance. Pipe and utility work has its own codes; see water and sewer line construction and other heavy and civil engineering construction. Grading and excavation fall under site preparation.

The figures describe two different businesses. On one side are small striping, patching and pavement-maintenance operators: 48.1% of loans were SBA Express, 20.6% went to start-ups and 15.2% to franchises, which in this code most likely means franchised sealcoating, striping and pavement-repair concepts. On the other are heavy road and bridge contractors with crews, plants and fleets: 34 loans, 14% of the total, were $1 million or more, and the 90th percentile was $1,662,000.

The median rate sits above the national one even though the median loan is larger, and the Express share is a likely reason. SBA guarantees only 50% of an Express loan, against 75% to 85% of a standard 7(a), so the lender carries more of the risk itself, and the smaller Express loans fall in higher rate-cap bands. See SBA 7(a) vs SBA Express and SBA loan rates.

Bonding comes before borrowing

Public road work is bonded. A contractor bidding a state, county or city job needs bid, performance and payment bonds, and a surety decides how much work it will bond by reading the contractor's balance sheet: working capital, net worth and the work-in-progress schedule. A loan changes that picture. Spending cash on equipment turns working capital into iron. A term loan adds a current portion of long-term debt. A loan that leaves working capital on the balance sheet can support bonding capacity. A road contractor should show its surety the structure before signing a loan, not after.

Lenders read the same schedule the surety does: contract value, costs to date, billings to date, estimated cost to complete, and the over- and under-billings that follow. Under-billing, work performed but not yet billed, is the line lenders watch, because it can hide a job running over budget. See contract financing.

Getting paid on public work

Transportation departments, counties and cities are reliable payers but not fast ones. Progress billings pass through an engineer's approval, and the owner withholds retainage, a share of each payment held until the job is accepted, which can leave a large balance outstanding long after the crew has moved on. Receivables more than 90 days past invoice are typically ineligible for a borrowing base, and lenders commonly exclude retainage altogether, so a road contractor's line of credit is often smaller than its receivables suggest.

The season compounds it. Across much of the country paving stops in winter, and a contractor carries key staff, equipment payments and insurance through months with little revenue. Lenders test coverage on annual figures but want to see the monthly pattern, and a seasonal line sized to the gap usually beats stretching a term loan. See lines of credit for government contractors and seasonal lines of credit.

Winter gaps are also where merchant cash advances tend to creep into a contractor's books. SBA will not refinance an active merchant cash advance; from 1 October 2026 an advance becomes eligible only once converted to a term loan that has amortized for at least 24 months with no new advance since. See refinancing cash advances for contractors.

The fleet: SBA or equipment financing

Pavers, rollers, milling machines, distributors, dump trucks and lowboys are the core assets, and a deep market of equipment lenders and manufacturers' finance arms competes to finance them. 7(a) can finance equipment over up to 10 years, or 15 if its useful life supports it, and can bundle it with working capital and refinancing in one loan. An equipment lender usually takes only the machine it finances as collateral, and leaves the rest of the balance sheet alone. Transparent's book holds 244 equipment lenders alongside 278 SBA lenders, and the right answer often uses both. See equipment financing vs SBA 7(a).

An SBA lender takes a blanket lien and wants its own position on the equipment it finances; existing equipment lenders either stay senior on their own units or get paid off. Refinancing existing equipment debt with 7(a) requires the new payment to be at least 10% lower and the debt current for the last 12 months. Lenders value the fleet at orderly liquidation value; road equipment has an active resale market, so it supports a loan better than most specialized machinery. See refinancing equipment loans.

Seven acquisitions, and why they were large

Only 7 loans, 2.9% against 10.4% nationally, financed a change of ownership, but at a median of $1,900,000 and a median rate of 8.75%. A road contractor worth buying brings a fleet, trained crews, prequalification with transportation departments, a bidding record and a backlog, and those cost money. Much of the price is often equipment the lender can appraise, not goodwill alone.

The risks are particular. Prequalification and bonding rest on the contractor's record and balance sheet, and a surety will underwrite the new owner and the leveraged balance sheet after closing, not the seller's. Backlog is only as good as its margins, so lenders ask for job-by-job estimates on the remaining work. Where the amount financed, less appraised real estate and equipment, exceeds $250,000, SBA requires an independent business valuation; a solid equipment appraisal reduces the goodwill it has to support. From 1 October 2026 the loan must show 1.25x debt service coverage on historical results, amortize over no more than 10 years except any real estate share, and carry a quality of earnings report on a purchase of $3 million or more excluding real estate. See financing an excavation company acquisition, the SBA valuation requirement and acquisitions above the SBA limit.

Preparing a road contractor's file

Start with the SBA checklist: 2–3 years of business tax returns, a P&L and balance sheet with a year-to-date P&L through last month-end, a debt schedule with copies of notes being refinanced, and personal returns and a personal financial statement for each owner of 20% or more, each of whom guarantees the loan. Then add what road work needs:

• A current WIP schedule and the last two year-end schedules, tied to the financial statements
• Backlog by job: owner, contract value, remaining value and estimated margin
• A letter from the surety stating single-job and aggregate bonding capacity
• An AR aging by customer, with retainage shown separately
• An equipment list: year, hours, owned or financed, lienholder and payoff
• Monthly revenue for the last two years, to show the season
• Transportation-department prequalification and any small or disadvantaged business certifications

SBA requires debt service coverage of at least 1.15x, and 1.0x globally; conventional banks commonly look for 1.25x. Many contractors' tax returns use a different accounting method from their reviewed statements, so bring both with a reconciliation; see audited, reviewed and compiled financials. Transparent builds the full lender package — financing model, lender presentation, blind teaser and underwriting memo — in a day once the documents are in, and a road contractor's package explains the WIP, the backlog and the bonding position before lenders have to ask.