Fuel Management at FBOs: From Truck to Invoice

Fuel is the core product at most FBOs. It is the largest revenue line, the largest cost line, and the operation that touches more customers than anything else you do. Despite this, fuel management is one of the areas where FBOs most commonly rely on manual processes, handwritten fuel tickets, and end-of-day reconciliation that amounts to guesswork.

Having built FBO software for over 400 locations, I have seen every variation of fuel management - from single-truck operations at rural airports to multi-product, multi-truck operations pumping hundreds of thousands of gallons per month. The details vary, but the fundamental lifecycle is the same everywhere.

Receiving Fuel into Inventory

The fuel lifecycle starts when a transport truck arrives to deliver fuel to your storage tanks. This is where accurate tracking begins, and it is where many FBOs make their first mistake.

When fuel is delivered, you need to record several pieces of information: the delivery date, the supplier, the product type (Jet-A, 100LL, diesel, etc.), the quantity delivered in gallons, the cost per gallon, and the tank it was delivered into. The quantity should be verified against the bill of lading and, ideally, against your tank gauging system.

Temperature correction matters here. Fuel expands and contracts with temperature, and deliveries are typically measured in net gallons (corrected to 60 degrees Fahrenheit). Your tank gauge may read in gross gallons (actual volume at ambient temperature). If you do not account for this difference, your inventory numbers will never reconcile.

Good FBO software creates a fuel receiving record that connects to your inventory system and your accounts payable. When you receive 8,000 gallons of Jet-A at $4.25 per gallon, the system should automatically increase your Jet-A inventory by 8,000 gallons and create a payable for $34,000. This is the foundation that everything else builds on.

Inventory Tracking and Tank Management

Once fuel is in your tanks, you need to know how much you have at all times. This serves three purposes: operational (do I have enough fuel to meet today's demand?), financial (what is the value of my fuel inventory?), and compliance (am I losing fuel to leaks or theft?).

Tank gauging systems like Veeder-Root provide continuous, automated readings of tank levels. The software polls the gauging system at regular intervals and records the tank level. This gives you a running history of inventory levels that you can compare against your sales and receiving records.

For FBOs without automated tank gauging, manual stick readings are the alternative. The line crew physically measures the fuel level in each tank, typically at the start and end of each shift. The software should make it easy to enter these readings and should calculate the inventory volume based on the tank's calibration chart (since most tanks are not uniform cylinders, the relationship between stick height and volume is not linear).

Weighted Average Cost

An important financial detail: when you receive fuel at different prices over time, what is the cost of the fuel you are selling today? Most FBOs use weighted average cost, where the cost per gallon is the weighted average of all fuel currently in the tank. When you receive 5,000 gallons at $4.20 and you already had 3,000 gallons at $4.10, your new weighted average cost is $4.16 per gallon. Your software should calculate this automatically with each receiving event.

Loading Trucks and Dispatching

Before fuel goes into an aircraft, it goes into a fuel truck (or over-the-wing from a fixed dispenser at some smaller airports). Tracking fuel from tank to truck is a step that many FBOs skip in their software, but it matters for accurate inventory management.

When a fuel truck is loaded from the storage tank, the software should record the truck number, the product loaded, the quantity, and the time. This creates a chain of custody from the storage tank to the fuel truck to the aircraft. If there is a discrepancy later, you can trace where the fuel went at each step.

Truck capacity tracking is also important. Each fuel truck has a known capacity, and the software should alert the dispatcher if someone tries to load more fuel than the truck can hold. This seems obvious, but overfills happen, and they are expensive and dangerous.

Meter Integration

This is where modern fuel management separates itself from the old clipboard-and-pencil approach. Electronic fuel meters on dispensing trucks and fixed fueling positions can transmit actual dispensed quantities directly to the FBO's software, eliminating manual gallon entry.

Veeder-Root

Veeder-Root systems are primarily known for tank gauging, but they also integrate with dispensing operations. The TLS (Tank Level Sensor) system provides real-time tank inventory data that the software can poll automatically. This data feeds into your inventory reconciliation.

Liquid Controls (LCMS)

Liquid Controls meters are commonly found on fuel trucks. The LCMS (Liquid Controls Metering System) captures the start and stop totalizer readings for each dispensing event and can transmit this data electronically. When integrated with your FBO software, the actual gallons dispensed flow directly into the fuel ticket and subsequently into the invoice. No one has to read a meter, write down a number, walk back to the office, and type it in.

TCS (Trident Control Systems)

TCS provides fuel management systems that integrate metering, inventory tracking, and dispensing controls. Their systems can interface with FBO software to provide automated fuel ticket creation based on meter data. TCS integration is particularly common at larger FBOs with multiple trucks and high transaction volumes.

The value of meter integration cannot be overstated. Manual gallon entry is the single largest source of billing errors at FBOs. A line technician who fuels 30 aircraft in a day and writes down gallons by hand is going to make mistakes. Transposed digits, misread meters, and illegible handwriting all lead to incorrect invoices - and incorrect invoices lead to customer disputes, revenue loss, and wasted administrative time.

Dispensing and Fuel Ticket Creation

When fuel is dispensed into an aircraft, a fuel ticket is created. This ticket is the source document for everything that follows - the invoice, the inventory deduction, the contract fuel authorization, and the regulatory records.

A complete fuel ticket includes: the date and time, the aircraft tail number, the customer name or account, the fuel type, the quantity in gallons (from the meter or manually entered), the price per gallon, the truck number, and the line technician who performed the fueling. For contract fuel transactions, additional data like flight number, pilot name, and destination may be required.

The software should create the fuel ticket in real time - either from a mobile device on the ramp or from a desktop in the office. The sooner the ticket is created, the more accurate the data. A ticket created from memory at the end of a long shift is far less reliable than one created immediately after fueling.

From Fuel Ticket to Invoice

The fuel ticket feeds into the invoicing process. For retail customers paying at the time of fueling, the ticket becomes an immediate invoice. For account customers, fuel tickets accumulate and are invoiced at the end of a billing cycle (typically monthly). For contract fuel customers, the ticket triggers the authorization and settlement process with the fuel supplier.

The key requirement is that the fuel ticket and the invoice must agree. The gallons, the price per gallon, and the total must match. If they do not, someone has either edited the ticket after the fact or made a data entry error. Your FBO software should make it difficult to create an invoice that does not match the underlying fuel ticket.

Fuel Reconciliation

Reconciliation is the process of verifying that the fuel you received, minus the fuel you sold, equals the fuel you still have. It sounds simple, but in practice it is one of the most challenging aspects of fuel management.

The basic formula is: Beginning Inventory + Fuel Received - Fuel Sold = Ending Inventory. If the calculated ending inventory does not match your actual tank readings, you have a discrepancy that needs to be investigated.

Shrinkage

Some discrepancy is normal and expected. This is called shrinkage, and it comes from several sources: temperature variation between gross and net gallons, meter calibration drift, evaporation (more significant for avgas than Jet-A), small spills during fueling, and the inherent imprecision of tank gauging. Industry standards typically consider shrinkage of 0.5% to 1.0% acceptable.

When shrinkage exceeds normal levels, you have a problem. It could be a meter that is out of calibration (dispensing more fuel than it is recording), a tank leak, theft, or fuel tickets that were not entered into the system. Your software should calculate shrinkage automatically and flag it when it exceeds your threshold.

Reconciliation Reports

The software should generate reconciliation reports that show, for each product and each tank: beginning inventory, all receiving events, all dispensing events, calculated ending inventory, actual ending inventory (from gauge or stick reading), and the variance. These reports should be generated daily and reviewed by management.

Fuel Reports and Analysis

Beyond reconciliation, FBO managers need reports that answer operational and financial questions. How many gallons did we sell this month by product type? What is our average selling price? What is our margin? Which customers are our largest fuel buyers? How does this month compare to the same month last year?

Fuel tax reporting is another critical requirement. Most states impose an excise tax on aviation fuel, and the rates and exemptions vary. Some states exempt fuel sold for international flights. Some have different rates for Jet-A and avgas. Your software needs to track which sales are taxable, at what rate, and generate the reports needed for your state fuel tax filings.

Supplier reconciliation reports compare what you have paid your fuel supplier against what you received. Contract fuel settlement reports compare what the fuel supplier paid you against the transactions you submitted. These reports are essential for catching errors and disputes early, before they become aged receivables or write-offs.

Frequently Asked Questions