Custom Truck One Source (CTOS) Q3 2026 earnings review
Custom Truck raises profit plan, but fleet spending drains cash
Booming demand for power-grid rental trucks lifted Custom Truck One Source's profit even as delayed truck deliveries held back revenue. The specialty truck provider grew rental revenue 20%, which pushed operating cash profit up 16% to $111 million despite total sales rising only 3%. Chief financial officer Chris Eperjesy raised the full-year earnings outlook for a third time, but cut the cash flow plan to pay for more rental trucks.
| Revenue | $495.2M +2.7% from a year ago |
|---|---|
| Operating cash profit (Adjusted EBITDA) | $110.9M +15.6% from a year ago |
| Full-year Adjusted EBITDA outlook | Raised $7.5M middle of the range: +18.3% growth |
| Full-year cash flow outlook | Cut to slightly positive from >$50M |
⚖️ Verdict: ⚪ Neutral
The story is unchanged because surging rental demand and poor cash conversion offset each other in the exact same way as last year. Rented equipment passed $1.5 billion with 84% fleet usage in October, backing up claims of a multi-year power-grid cycle. The bad news: for the second year in a row, the company abandoned its second-half inventory reduction and >$50 million cash flow target to buy more fleet and stockpile truck chassis, leaving net debt flat at $1.65 billion.
The question now is whether redirecting all 2026 cash flow into the rental fleet will pay off fast enough to bring debt leverage below three times earnings in 2027. If utility transmission rentals keep growing at a double-digit clip, earnings alone can carry the ratio down; if rental usage peaks, the company will be left with $1.65 billion of debt and $1 billion of inventory. Full-year 2027 fleet spending and cash flow plans in the fourth-quarter report will settle it.
🐂 Bull Case
Utility Rental Demand Lifts Fleet Usage and Pricing
Custom Truck One Source rents and sells boom trucks, cranes and digger derricks used to build and repair power lines. Chief financial officer Chris Eperjesy said the third quarter reflects "the early stages of what could be a once-in-a-generation transmission demand super-cycle in our utility end markets". Critics have worried that relying on one industry leaves the business exposed when utility spending pauses.
- Rental revenue: $152.7 million, up 20.1% from a year ago
- Rented fleet value (original equipment cost, or OEC, on rent): $1.39 billion in Q3, up 10.5% from a year ago, and above $1.5 billion in October
- Fleet usage (utilization): 81.5% in Q3, up 2.2 percentage points, and above 84% in October
- Yearly rental return (OEC on rent yield): 39.4%, up 1.2 percentage points from a year ago
The October jump above $1.5 billion of rented equipment tests Eperjesy's claim and backs it up, because customers are renting more trucks at higher rates heading into year-end. Non-utility vocational rentals also added about $45 million of rented equipment from a year ago, so growth is starting to broaden beyond power lines.
What to watch: yearly rental return and fleet usage in the fourth quarter. A drop from October's 84% usage rate would show that seasonal winter slowdowns still outweigh the transmission boom.
Rental Mix Shift Expands Profit Margins
Renting trucks earns a much wider profit margin than selling them. In the third quarter, total revenue rose 2.7% to $495.2 million because weather and supplier delays held back truck sales, while the Specialty Equipment Rentals (SER) division grew total revenue 17.6% to $223.4 million.
Because rentals made up a bigger share of revenue, the cost of equipment sales fell by 2.4 percentage points of total revenue from a year ago, to 53.3% by our math. That mix shift lifted gross margin by 2.0 percentage points to 22.9% and operating margin by 0.9 percentage points to 7.7%. Adjusted EBITDA — operating cash profit excluding one-offs — rose 15.6% to $110.9 million, prompting a third full-year outlook raise.
What to watch: fourth-quarter operating cash profit margin. Delayed truck sales will ship in Q4, and if they pull the margin down below 20.4% (implied by the outlook), the third-quarter margin gain was mostly temporary mix.
🐻 Bear Case
Fleet Spending and Truck Stockpiles Wipe Out Cash Plan
For three quarters, Custom Truck promised more than $50 million of levered free cash flow (operating cash flow after fleet purchases, sales and inventory financing) for 2026, backed by a plan to cut inventory below six months of supply. Last year, the company made the same second-half cash promise and cut it mid-year.
It just repeated the pattern. The equipment provider cut its 2026 levered free cash flow outlook to "slightly positive" and raised net rental fleet spending by $35 million at the middle of the range, to $210–230 million, calling it a "deliberate reallocation of 2026 cash flow toward rental fleet growth". At the same time, it dropped the six-month inventory goal: it now expects year-end inventory months on hand to stay flat with 2025 to "prepare for the expected growth in 2027 and the build-up of chassis inventory under our pre-buy program ahead of 2027 emissions regulations".
Through nine months, inventory has grown by $84.8 million since December to $1.02 billion, absorbing cash even before the extra fleet spending. What to watch: fourth-quarter inventory and levered free cash flow, which stood at $3.8 million through nine months by our math. A negative full-year cash reading would show that working capital and fleet needs still consume all operating cash.
Accounting Change Masks a Drop in Manufacturing Profit
The Specialty Truck Equipment and Manufacturing (STEM) division builds and sells vocational trucks to outside customers and to Custom Truck's own rental fleet. Beginning in January 2026, the truck maker started booking a profit markup when STEM sells trucks to the rental division, without restating 2025 segment profit on the same basis.
- Reported STEM Adjusted EBITDA: $36.6 million, vs $17.7 million a year ago
- Profit booked on sales to the rental fleet: $25.2 million by our math ($159.0 million of internal sales minus $133.8 million of cost), vs zero a year ago
- Underlying STEM Adjusted EBITDA without internal markup: $11.4 million by our math, down 35.2% from a year ago
- Third-party equipment gross margin (excluding depreciation): 13.8% by our math, down 2.0 percentage points from 15.8% a year ago
The company chose to "prioritize our production for additional investment in the rental fleet", which lowered outside sales by 5.5% to $270.2 million, while "a hailstorm at our Kansas City facility and a vendor warranty recall" delayed more than $20 million of shipments. Even so, the 2.0-point drop in outside equipment gross margin shows that manufacturing profitability weakened.
What to watch: fourth-quarter third-party equipment gross margin when the delayed trucks ship. A reading below 15% on peak fourth-quarter volume would confirm ongoing price pressure on new truck sales.
Debt Ratio Falls on Earnings While Total Debt Holds Flat
Chief executive Ryan McMonagle highlighted a "meaningful reduction in net leverage, to 3.70x", down from 4.31x at the end of 2025 and 4.53x a year ago. Net leverage measures net debt divided by the last twelve months of Adjusted EBITDA, and the company aims to push the ratio below 3.0x in 2027.
All of that progress came from rising earnings rather than paying off debt. Net debt ended the third quarter at $1.651 billion, down less than $2 million from $1.653 billion a year ago and $3 million from year-end 2025, while twelve-month Adjusted EBITDA climbed 22.4% to $446.4 million. Because Custom Truck redirected its 2026 cash flow into buying more rental trucks, debt paydown will contribute almost nothing to leverage reduction this year.
What to watch: net debt at year-end 2026 and the 2027 fleet spending plan. Reaching below 3.0x in 2027 without paying down debt would require Adjusted EBITDA to exceed $550 million by our math.
👓 Other Themes
Backlog Rebounds on Delayed Shipments and Higher Orders
Sales order backlog — signed customer orders for new trucks waiting to be built — rose 22.2% from a year ago and 6.0% from last quarter to $341.9 million, as third-quarter orders grew 22%. That increase included more than $20 million of trucks held back by the Kansas City hailstorm and vendor recall; at 3.8 months of sales, backlog remains just below the company's 4-to-6-month target.
💲 Other KPIs
The original equipment cost (OEC) of the total rental fleet rose 8.8% from a year ago and $85.7 million from last quarter, its largest single-quarter addition this year. Custom Truck transferred more trucks from its own factories into the rental fleet to meet utility demand.
Total financing costs fell from $54.0 million a year ago by our math. Net interest expense on corporate debt dipped 0.8% to $26.2 million, while interest on floor plan payables — short-term loans that finance truck inventory — dropped 21.5% to $10.8 million on lower average inventory and lower rates.
Signed customer orders waiting for delivery rose $19.5 million from last quarter and 22.2% from a year ago, reversing a two-quarter year-over-year decline. More than $20 million of delayed third-quarter deliveries stayed in the quarter-end total.
🔮 Guidance
Raised. The middle of the range moved up $7.5 million to $453.8 million, or 18.3% growth for the year. It is the third raise this year (+$5.0M, +$18.8M, +$7.5M). By our math, the plan leaves $128.1 million for Q4, up 6.1% from a year ago against a high prior-year base.
Unchanged. The plan still calls for 8% to 13% growth (10.6% at the middle of the range). Because Q3 shipments were delayed, the full-year midpoint leaves $629.7 million for Q4 by our math, a 19.2% jump from a year ago as the delayed $20 million-plus of trucks ship.
Raised. The middle of the range rose $17.5 million to $880 million on strong utility transmission demand. By our math, that leaves $230.8 million for Q4, roughly flat (+0.2%) against last year's fourth quarter when rental fleet buyouts peaked.
Unchanged. The company now expects total STEM revenue toward the top of this range as internal sales to the rental fleet offset Q3 delivery delays. By our math, the middle of the range leaves $421.8 million for Q4 (+5.8% from a year ago), with third-party new truck sales planned up mid-to-high teens in Q4.
Raised. Net fleet spending (purchases minus used equipment sales) increased by $35 million at the middle of the range, its second raise this year after starting at $150–170 million. Gross fleet purchases are now planned at $400–430 million, with most of the earnings benefit arriving in 2027.
Cut. After holding the $50 million-plus target for three quarters, Custom Truck lowered the outlook to slightly positive because it is spending $35 million more on rental trucks and keeping year-end inventory months on hand flat with 2025 rather than cutting below six months.
Unchanged. The ratio already sits at 3.70x at the end of Q3. Even with no fourth-quarter debt paydown, full-year Adjusted EBITDA at the middle of the range ($453.8 million) puts year-end leverage near 3.64x by our math. The 2027 target remains below 3.0x.
❓ Key Questions
Did the $475 million PNC floor plan facility renew on unchanged terms?
The non-trade floor plan credit line matured on August 25, 2026 with $397 million drawn at Q2. The earnings release does not mention the renewal; the upcoming 10-Q filing will show whether the facility size, interest spread or advance rates changed.
How much of the $1.02 billion inventory is 2027 pre-buy truck chassis?
Custom Truck dropped its sub-six-month inventory target to stockpile truck chassis ahead of 2027 emissions rules. Investors need to know how many millions of dollars sit in pre-buy chassis and whether customers have committed to buying them.
What caused STEM's outside equipment gross margin to drop 2 percentage points?
Excluding depreciation and internal sales to the rental fleet, STEM's gross margin on outside equipment sales fell from 15.8% to 13.8% by our math. Management did not say how much came from the Kansas City hailstorm versus price pressure.
How will net leverage reach below 3.0x in 2027 without debt paydown?
Net debt is unchanged from a year ago at $1.65 billion, and 2026 cash flow is now near zero. Hitting 3.0x in 2027 requires a return to large free cash flow or another year of >20% EBITDA growth.