A mobile fueling business brings fuel to the vehicle or tank where it sits: a fleet yard at night, a job site at dawn, a generator at a cell tower. Starting one takes a fuel supplier, a truck with a meter the state accepts, the registrations that come with hauling fuel, insurance, a fire permit for the places you fuel, and customers who buy every week. Business customers are the steadiest start. Below are the steps, the federal thresholds, what the first truck costs and how to price a gallon.
Five kinds of mobile fueling, and who pays for each
Five lines of work can share one truck.
| Kind | Who pays | What goes in the tank | When |
|---|---|---|---|
| Fleet wet hosing | Trucking companies, school bus operators, city and county fleets | Clear diesel, some gasoline | Overnight, while the units are parked |
| Construction and equipment | Contractors and equipment rental yards | Dyed diesel for off-road machines | Before or after the shift, on the job site |
| Generators and standby power | Hospitals, cell tower owners, data centers | Diesel into generator tanks | Scheduled top-offs and outage calls |
| Farm fuel | Farms and ranches | Dyed diesel and gasoline | Heaviest at planting and harvest |
| Consumer fuel apps | Drivers who order from a phone | Gasoline | Where the car is parked: offices, apartment lots, homes |
Wet hosing is fueling each vehicle straight from the truck's hose, unit by unit. Dyed diesel is red, untaxed diesel for off-road use. In the consumer model a driver orders from an app, a small truck fills the parked car, and the customer pays a delivery fee or a membership on top of the fuel. Each stop sells one car's tank, and the fire code limits where that truck may stand.
Win business customers first
A first truck pays for itself on contract gallons. One fleet yard can fill a night at a single address, with the units and gallons known before the truck rolls, and construction and generator work add daytime gallons. City fleets and public school districts buy through bids and bring a federal tax rule covered below. Line up two or three accounts whose weekly gallons you can count before you buy the truck; mobile and onsite fueling explained shows how fleets use the service.
Where the fuel comes from
Buy from a jobber. A fuel jobber is a wholesaler that buys by the truckload at the terminal and resells. It can deliver into your yard tank at a delivered price or sell you loads at its bulk plant. You pay its margin, and it carries the supply contract and the terminal credit.
Lift at the rack. The rack is the loading lane at a fuel terminal, and the rack price is the wholesale price posted there each day. Loading under your own name takes a supplier account, with credit set from your balance sheet and payment history; a company with neither starts on prepay or a letter of credit. Terminals set their own rules for which trucks and drivers may load. You keep the jobber's margin and take on the price risk, and how to become a fuel jobber covers that road.
The truck, the driver's license and the meter
A pickup carries a transfer tank in the bed with a 12-volt pump. A flatbed or trailer carries a larger skid tank with its own pump, meter and reel. A tank wagon, or bobtail, is a straight truck with a 2,000 to 3,000 gallon tank split into compartments, so clear diesel, dyed diesel and gasoline ride on one run. Four numbers in the federal rules set what the driver needs.
- 119 gallons. A tank over 119 gallons is a bulk packaging (49 CFR 171.8), and a bulk packaging of hazardous material wears placards, the diamond hazard signs, at any quantity (172.504(a)); see hazmat placards for fuel trucks.
- 100°F. Gasoline is a Class 3 flammable liquid. Diesel with a flash point of 100°F or more may be reclassed as a combustible liquid (173.120(b)), which in a tank of 119 gallons or less is outside the hazmat rules (173.150(f)(2)).
- 26,001 pounds. A commercial driver's license (CDL) is required for a truck rated 26,001 pounds GVWR or more, the loaded weight its maker rates it for, and for a truck of any size carrying placarded hazardous materials (383.5).
- 1,000 gallons. On the CDL, H covers placarded hazardous materials, N covers tanks of more than 119 gallons each that total 1,000 gallons or more, and X means both (383.5, 383.93, 383.153).
| Setup | Hazmat status | Driver's license |
|---|---|---|
| Diesel, tank of 119 gal or less, classed as combustible | Outside the hazmat rules (173.150(f)(2)) | CDL only at 26,001 lbs GVWR or more |
| Diesel, tank over 119 gal | Placards, papers, training (173.150(f)(3)) | CDL with H at any weight; N at 1,000 gal total |
| Gasoline, tank over 119 gal | Placarded at any quantity (172.504(a)) | CDL with H at any weight; N at 1,000 gal total |
| Tank wagon, 2,000 to 3,000 gal, rated 26,001 lbs or more | Cargo tank, placarded | Class B CDL with X (H plus N) |
Source: 49 CFR, read October 24, 2026. Links are under Sources below.
A placarded truck rated under 26,001 pounds takes a Class C CDL with the endorsements (383.91). First-time Class B and H applicants complete entry-level training from a registered provider (380.609), and H also needs a cleared TSA security threat assessment or a TWIC card (383.141); see CDL hazmat and tanker endorsements.
The meter is the cash register. NIST Handbook 44, Section 3.31, the code written for states to adopt for meters on vehicle tanks, holds a petroleum meter rated over 30 gallons a minute to 0.3% in service and 0.15% when new or newly repaired. State or local inspectors test and seal it; New York City inspects each fuel truck and its meter every year and tags a failing meter out of use. Buy a meter sold as custody-transfer rated, approved for selling by measure, and see weights and measures inspections.
A tank built to the DOT 406 or older MC 306 specification also runs on the clock in 49 CFR 180.407: an external visual inspection and a leakage test every year, an internal visual inspection and a pressure test every five years. See cargo tank inspections and the DOT 406 test schedule.
Insurance
The federal minimum is the table at 49 CFR 387.9. It covers private and for-hire carriers, starting at trucks rated 10,001 pounds GVWR (387.3(c)). For gasoline and diesel:
- Interstate, any tank size: $1,000,000, the row for oil listed in the hazardous materials table, in any quantity.
- Intrastate, tank over 3,500 water gallons: $1,000,000. That row covers intrastate oil in bulk, and Part 387 defines bulk as containers over 3,500 water gallons (387.5).
- Intrastate, 3,500 water gallons or less: state rules govern. The subpart exempts non-bulk oil in intrastate commerce (387.3(c)(2)).
- $5,000,000 covers hazardous substances as defined in 49 CFR 171.8, a definition that excludes petroleum unless a product is listed by name.
Proof is the MCS-90 endorsement on your auto policy, kept at your principal place of business (387.7(d)); see the MCS-90 guide. Fueling is unloading, and the ISO broadened pollution endorsement for business auto, form CA 99 48, leaves out loading and unloading incidents, according to insurance wholesaler CRC Group; transportation pollution liability can cover them. MoneyGeek's October 2026 average for $1 million of liability on a hazmat tanker is $14,885 a year.
Licenses, registrations and permits
Federal
A truck rated 10,001 pounds or more that crosses state lines needs a USDOT number from FMCSA. Inside one state, the federal rule reaches hazmat carriers only for loads that need a hazmat safety permit, a list (385.403) that leaves out gasoline and diesel, and FMCSA lists 38 states and Puerto Rico that require USDOT numbers of intrastate carriers. Operating authority, the MC number, is for carriers paid to haul other people's cargo across state lines, $300 per type; FMCSA lists private carriers, those hauling their own cargo, as exempt. A company hauling placarded hazmat, bulk diesel classed as combustible included, registers with PHMSA, the Pipeline and Hazardous Materials Safety Administration: $250 a year plus a $25 processing fee per filing for a small business (107.601, 107.612, 173.150(f)(3)).
State fuel tax licenses
States license fuel businesses by role, and the roles vary. Three examples:
- Texas licenses anyone transporting gasoline or diesel in the state outside the terminal system as a motor fuel transporter, with exceptions for some who carry fuel they own, and charges a delivery fee on each load pulled into a cargo tank: $1.70 under 2,500 gallons, $3.45 from 2,500 up to 5,000.
- California requires an ultimate vendor license to sell tax-paid clear diesel without the state diesel tax to farmers or exempt bus operators who give an exemption certificate; the vendor claims the refund. A seller's permit may be needed too.
- New York requires registration as a distributor of diesel motor fuel to sell diesel, except diesel sold to consumers straight into a vehicle's tank. Filling a customer's bulk tank that has a nozzle for fueling vehicles, at a construction site for one, takes that registration first, farm sites excepted.
States often want a motor fuel tax bond, and a qualifying truck that crosses state lines files IFTA, the quarterly fuel tax return for interstate trucks.
IRS Form 637
Form 637, the IRS registration for certain fuel excise activities, comes up for a mobile fueler in two common cases. One is clear diesel sold to a city, county or public school district for its own use: when the government buys without a government credit card, the $0.244 a gallon federal diesel tax comes back only to a registered ultimate vendor, activity letter UV (IRS Publication 510). The other is blending biodiesel or another fuel into diesel outside a terminal, activity letter M. Register before you claim; see the Form 637 guide.
Fire code permits
Where the International Fire Code (IFC) is adopted, section 5706.5.4.5 lets tank vehicles fuel vehicles with Class II and III fuel, flash point 100°F or higher, at commercial, industrial, governmental or manufacturing sites, where permitted. Section 5707 covers on-demand mobile fueling of Class I, II and III liquids, gasoline included. Washington's adopted 5707 requires, among other things:
- A permit and approval from the fire code official, and fueling only at approved locations
- A safety and emergency response plan, training records, and a site plan when the official asks
- No fueling on public streets or ways, in buildings, on parking structure roofs, or from a trailer's tanks
- The point of fueling 25 feet from buildings, lot lines and combustible storage, with storm drain covers within 15 feet
- A hose of 50 feet or less, a break-away device, a 30-gallon fuel limit switch, a 4A:80-B:C extinguisher and a 5-gallon spill kit
- The truck attended, with brakes set and warning lights on
Minnesota caps an on-demand mobile fueling vehicle at 1,200 gallons of aggregate cargo capacity. Harnett County, North Carolina charges $100 a truck and $100 a site for the permits. Ask the fire marshal which section your work falls under before you quote it.
Your yard and your town
Fuel kept at your yard in aboveground containers of 55 gallons or more, totaling over 1,320 gallons, brings EPA's SPCC rule, a written spill plan with containment, at a site that could reasonably be expected to discharge oil to navigable waters (40 CFR 112.1); see SPCC plans for fuel jobbers. Add a local business license and zoning for the yard where the truck parks.
What it costs to start
Sourced figures are list prices and published fees, read October 24, 2026. The truck prices are a worked example; age, miles, the tank and the meter package move them.
| Item | Figure | Basis |
|---|---|---|
| Tank wagon, 2,000 to 3,000 gallons, new | $150,000 to $250,000 | Worked example |
| Tank wagon, used | $40,000 to $100,000 | Worked example |
| Pickup setup, diesel tank of 119 gallons or less | The tank, plus $645 for a 12-volt pump | Fill-Rite list, 15 gpm with nozzle |
| Custody-transfer meter | $2,942 to $10,800 | Fill-Rite list, 1.5-inch to 2-inch with register |
| Hose reel | $834 | Fill-Rite list, 1 inch by 50 feet, with nozzle |
| Liability insurance, $1 million | About $14,885 a year | MoneyGeek hazmat tanker average |
| PHMSA hazmat registration | $250 a year plus $25 a filing | 49 CFR 107.612, small business |
| Fire code permits | $100 a truck, $100 a site | Harnett County, NC |
| FMCSA operating authority | $300 | For-hire interstate only |
| State fuel licenses and bonds | Set by each state | Bond amounts follow state formulas |
| Software | FastDragon quotes to your operation | Trucks, drivers and modules |
| First load, 2,500 gallons | $14,500 | Worked example, $5.80 a gallon |
| Receivables, one customer | About $184,000 | Worked example below |
Receivables are the line to plan hardest. You pay for fuel before you pour it and collect weeks later. The 20-tractor customer in the next section takes 6,000 gallons a week; at a $5.80 delivered cost (an example), that is $34,800 a week, about $4,971 a day. Billed weekly on net 30, the average gallon waits about 37 days for its money: half a week to the invoice, 30 days of terms, a few days to clear. That is about $184,000 tied up in one customer. Ten-day supplier terms carry about $50,000 of it; on prepay you carry all of it. The figure moves with fuel prices: EIA's U.S. average retail diesel price was $6.276 a gallon on October 19, 2026, $2.656 above a year earlier. Walk your bank through it before you sign the account.
Pricing your fuel
Price from your cost per gallon, delivered with taxes in, plus a margin per gallon. Fleet contracts often tie the cost to a published daily rack average both sides can check; see cost-plus vs market pricing. Add a delivery fee per stop, a fee per unit fueled, higher fees for after-hours and weekend calls outside the contract window, and a minimum gallon count below which a stop pays a small-delivery fee. Price each account for the truck hours it uses, as in pricing a new commercial account.
One customer's month, worked: a carrier's yard of 20 tractors, fueled five nights a week, 60 gallons each, 21 nights in the month.
| Line | Month |
|---|---|
| Gallons delivered (20 tractors × 60 gal × 21 nights) | 25,200 gal |
| Margin at $0.30 a gallon | $7,560 |
| Unit fees, 420 fills at $2.50 | $1,050 |
| Night stop fees, 21 at $30 | $630 |
| Gross margin | $9,240 |
| Truck share, 84 hours at $30 | $2,520 |
| Driver, 84 hours at $38.40 | $3,226 |
| Left after truck and driver | $3,494, or 13.9¢ a gallon |
The truck's $30 an hour spreads $6,300 a month over 210 night hours: a $2,800 payment on a $160,000 truck financed six years at 8%, $1,500 of insurance with pollution cover, $1,200 of upkeep and its own fuel, and $800 of permits, tests and office. The driver costs $32 an hour plus 20% for payroll. This stop uses four of the truck's ten hours a night, leaving six for other accounts. Replace every figure with yours.
Running the night and keeping the records
I have worked on the back-office side of fuel since 1995, and these records decide whether a night's work turns into cash.
- Proof of every fill. Unit, gallons, time, photo and GPS position, plus a signature when someone is there. Handbook 44 requires a record of every sale and a ticket copy for the customer (UR.2.2).
- A ticket line per unit. The odometer or hour meter on each line makes a fill bigger than the tank stand out; see fleet fuel theft prevention.
- The end-of-night check. Gallons loaded, less gallons ticketed, against gallons left on the truck. A gap that repeats needs a look that week.
- Fuel tax returns. State returns, quarterly IFTA for interstate trucks, and any ultimate vendor claim.
- Driver files. A driver qualification file for each CDL driver and DOT drug and alcohol testing, with an owner who is the only driver in a random pool of two or more (49 CFR 382.103). Hazmat training comes within 90 days of hire and every three years after, with records (172.704).
- Hours of service. A driver within 150 air miles who returns and is released within 14 hours, with 10 hours off between shifts, is exempt from the logbook and ELD rules when the carrier keeps time records for six months (395.1(e)(1)); see hours of service for fuel delivery drivers.
Where FastDragon fits
A new mobile fueling company can run on FastDragon Tank Wagon from its first truck. It adds the fuel on the truck, as inventory, to the dispatch board and driver app of FastDragon Hauling. FastDragon is ours, so weigh this section with the same eye as the rest.
Load a fleet's units from a spreadsheet, with product, tank capacity and department, and print the QR labels in one batch. Each run opens with the product and gallons in every compartment, makes the terminal pickup a planned stop, and warns when the drops need more than the truck holds.
The driver scans a unit's label on an ordinary phone and records the meter start and stop to three decimals and the odometer or hour meter, and a fill bigger than the unit's tank is flagged. An unattended site asks for no signature and keeps the photo, the time and the GPS position, and the app works without signal. Each pour leaves its compartment at that product's average cost on that truck, or FIFO from any 1 January, and the invoice adds charges per mile, per drop, per unit, after hours and on weekends, plus a small-delivery fee under the customer's minimum. The run refuses to load DEF where diesel is, and the reverse; see DEF delivery software.
At night's end the run shows gallons loaded, delivered and left, with the gap, flags an over or short past your tolerance, and carries leftovers to the next run. The office approves the drops, then sends the delivery BOLs and invoices; only approved drops go out. Customers see deliveries, invoices, statements and prices in their portal, pay online, and get gallons by unit, department and product, with MPG or gallons per hour, by email each month. FastDragon builds the IFTA report from the trucks' GPS, connects to QuickBooks Online and exports in QuickBooks format. FastDragon quotes to your operation. The wet hose fueling software guide and the fuel delivery software guide compare the systems.
Questions people ask
How much does it cost to start a mobile fueling business?
The truck is the largest item: in our worked example, $150,000 to $250,000 new or $40,000 to $100,000 used for a 2,000 to 3,000 gallon tank wagon. Add a $2,942 to $10,800 custody-transfer meter, about $14,885 a year of liability insurance, permits, the first load, and cash to carry customers until they pay.
Do I need a CDL for a fuel delivery truck?
Yes under 49 CFR 383.5 when the truck is rated 26,001 pounds GVWR or more, and at any weight when it carries placarded hazardous materials. Fuel in a tank over 119 gallons is placarded, so the driver needs a CDL with the H endorsement. Tanks totaling 1,000 gallons or more add N.
Is mobile fueling profitable?
It can be when the truck stays busy. In our worked example, a 20-tractor yard fueled five nights a week at cost plus $0.30 a gallon, $2.50 a unit and $30 a night leaves about $3,494 a month after its share of truck and driver costs, and two or three stops like it fill a night.
Do I need a permit for mobile fueling?
Yes, where the International Fire Code is adopted. Fueling vehicles from a tank truck at commercial, industrial or government sites falls under section 5706.5.4, on-demand fueling under section 5707, and both take an operational permit. Harnett County, North Carolina charges $100 per truck and $100 per site.
How do mobile fueling companies get fuel?
They buy from a jobber, a fuel wholesaler, at a delivered price into a yard tank or by the load at its bulk plant. Or they lift their own loads at a terminal rack at the posted rack price, under a supplier account with credit set from their finances. A new company may start on prepay.
What insurance does a fuel delivery business need?
Auto liability that meets 49 CFR 387.9: $1,000,000 for gasoline or diesel on a truck rated 10,001 pounds or more that crosses state lines, proven by an MCS-90 endorsement. Add pollution coverage that includes loading and unloading, since fueling is unloading.
Bring your first customer's unit list and we will load it live
Sources
Read October 24, 2026. Federal regulations on eCFR: 49 CFR 171.8 (bulk packaging, hazardous substance), 172.101 (hazardous materials table), 172.504 (placarding), 172.704 (hazmat training), 173.120 (flammable and combustible liquids), 173.150 (combustible liquid exceptions), 180.407 (cargo tank tests), 107.601 and 107.612 (PHMSA registration and fees), 383.5 (commercial motor vehicle, hazardous materials, tank vehicle), 383.91 (vehicle groups), 383.93 (endorsements), 383.141 (TSA approval for H), 383.153 (endorsement codes), 380.609 (entry-level training), 382.103 (drug and alcohol testing), 385.403 (hazmat safety permit), 387.3, 387.5, 387.7 and 387.9 (financial responsibility), 395.1 (short-haul exception), 40 CFR 112.1 (SPCC). FMCSA: Do I Need a USDOT Number?, Get Operating Authority. Meters: NIST Handbook 44 (2026), Section 3.31, Handbook 44 Introduction, NYC DCWP fuel oil inspection checklist. Fire code: Washington WAC 51-54A-5707, WAC 51-54A-5706, Minnesota Rules 7511.5707, Illinois State Fire Marshal liquid classes, 41 Ill. Adm. Code 180.10, Harnett County fire permit fees, 2025-2026. Fuel tax: Texas motor fuel transporters, Texas petroleum products delivery fee, CDTFA licenses, CDTFA ultimate vendor, New York instructions for Form TP-650, IRS Form 637, IRS Publication 510. Prices: EIA Gasoline and Diesel Fuel Update, Fill-Rite 1.5-inch meter, Fill-Rite 2-inch meter with EMR4 register, Fill-Rite hose reel, Fill-Rite 12-volt pump. Insurance: MoneyGeek commercial truck insurance cost, CRC Group on transportation pollution liability. The truck prices, delivered cost, customer month and receivables are worked examples.