Stepping up from a rigid to a prime mover is a change of business, not just a change of truck. The rates are better, the contracts are longer, and the capital needed to get on the road is several times what you have dealt with before. Add a B-double set and you are no longer financing one asset. You are financing three, each with its own value, its own working life, and its own treatment from the lender.
Short answer: Prime movers and B-double combinations are usually financed as separate contracts covering the prime mover and each trailer, rather than as a single package. Lenders assess the prime mover on kilometres and engine hours over a shorter term, and the trailers on condition over a longer one. Evidence of committed work carries real weight, particularly for operators moving up to multi-combination work for the first time.
What is a B-double, and why does the configuration matter to a lender?
A B-double is a prime mover pulling two semi-trailers, with the lead trailer carrying a fifth wheel that the second trailer couples to. It runs longer and heavier than a single trailer semi, which means better freight economics and additional access requirements. To a lender, it also means multiple assets on one application.
That distinction shapes everything downstream. A single contract over the whole combination sounds tidy, but it forces every asset onto the same term, which suits neither the prime mover nor the trailers. Most lenders prefer, and most experienced operators end up with, a facility that covers the combination through separate contracts matched to each asset’s life.
Access is worth understanding too. Multi-combination vehicles operate under network and permit arrangements administered through the National Heavy Vehicle Regulator in participating states and territories, and the routes a combination can legally use directly affect the work it can take. That is a business case question rather than a credit question, but a lender assessing a first-time B-double operator will want to see that the work has been thought through.
How do lenders treat trailers compared with the prime mover?
Very differently, and for good reason. A prime mover has an engine, a transmission and a driveline that accumulate wear at a rate you can measure. A trailer has none of those. Trailers hold value over long periods and are frequently financed over longer terms and to greater ages than the truck pulling them.
The practical implications for a combination purchase:
- Prime movers are assessed on kilometres and engine hours as much as calendar age, since linehaul work accumulates both quickly
- Trailers are assessed largely on condition, chassis integrity, brakes, suspension and tyres
- Refrigerated trailers carry an additional consideration in the fridge unit, which has its own hours and its own economic life
- Tankers, tippers and specialised trailers have a shallower resale market, which can affect both term and deposit
- Terms across a combination are commonly staggered, which lets you replace the prime mover without disturbing the trailer finance
Staggering matters more than it sounds. Prime movers are usually cycled every four to seven years in hard-worked applications, while a well-maintained trailer can run considerably longer. Matching the finance to that reality keeps your options open when it is time to upgrade.
What does a prime mover and B-double set cost to put on the road?
Enough that the finance structure genuinely matters. A new prime mover alone represents a substantial capital commitment before a single trailer is added, and a full B-double set can approach or exceed the cost of a small commercial property. The bands below give a working sense of the scale involved.
| Configuration | Assets involved | Indicative outlay, new | Indicative outlay, used |
|---|---|---|---|
| Prime mover only | Prime mover, no trailing equipment | $250,000 to $450,000 | $110,000 to $250,000 |
| Single trailer semi | Prime mover plus one semi-trailer | $310,000 to $570,000 | $150,000 to $320,000 |
| B-double, general freight | Prime mover plus A and B trailers | $400,000 to $730,000 | $200,000 to $450,000 |
| B-double, refrigerated or specialised | Prime mover plus specialised trailer set | Materially higher again | Varies widely by unit and hours |
Broad market ranges as a planning guide only, not quotes and not an offer. Actual pricing varies significantly by make, specification, build slot, condition and supplier. Indicative only, confirm current pricing with your supplier and the finance position with your lender or broker.
Should you finance the combination on one contract or separately?
Separate contracts under one approved facility is the more common structure, and usually the more flexible one. Each asset gets a term suited to its life, you can sell or replace a trailer without unwinding the whole arrangement, and the lender is not forced to average out very different risk profiles across one agreement.
There are situations where a single facility works well. Operators buying an entire combination at once from a single supplier sometimes prefer the administrative simplicity, and a package can occasionally be structured more efficiently when everything settles on the same day. The trade-off is flexibility later, so it is worth deciding deliberately rather than by default.
Staged purchasing is another option worth raising early. Plenty of operators finance the prime mover first, prove the work, then add trailer capacity six or twelve months later. That approach spreads the commitment and gives the lender trading history on the new operation before the second exposure goes on the books.
How do contracts and freight rates affect the application?
Substantially, particularly for anyone new to multi-combination work. A lender looking at a $600,000 exposure wants to understand where the revenue comes from. A signed sub-contractor agreement with a known prime contractor reads very differently to an intention to pick up spot market work.
Things that strengthen a prime mover application:
- A written rate agreement or sub-contractor contract, ideally with a stated term
- A history of invoices to the same client base, showing the work already exists
- Years of driving experience in the same category of work, even if as an employee
- Property ownership or another unencumbered asset in the business
- A deposit or a trade-in with real equity behind it
- Realistic costings that account for fuel, tyres, tolls, permits, insurance and maintenance rather than just the repayment
First-time owner-drivers are not shut out, but the file needs assembling carefully. Experience in the seat counts for a great deal, and a lender will usually take a longer look at an application backed by ten years of linehaul driving than one from someone entering the industry cold.
What term and structure suit a prime mover?
Terms of three to five years are common on prime movers, reflecting how quickly a hard-worked driveline accumulates kilometres. Trailers frequently sit on longer terms. A residual or balloon is often used on the prime mover so the repayment matches what the truck earns while it is at its most productive.
Setting the balloon sensibly is the part worth taking time over. Pitch it too high and you may find yourself with a lump sum larger than the truck is worth when the term ends. Pitch it at roughly what you realistically expect the unit to fetch at trade-in time, and it becomes a useful cash flow tool rather than a problem in waiting. Our guide to balloon payments covers how to think it through.
If you are buying second-hand, which is how most operators enter prime mover ownership, used truck finance explains how age changes the terms available. The broader structural options across the category are set out in our heavy vehicle finance guide, and there is more across the Truck & Trailer Finance category. For the products themselves, see truck finance and trailer finance.
Can I finance a prime mover and trailers on the one contract?
Some lenders will package a combination into a single agreement, though separate contracts under one facility is more common. Splitting them allows each asset a term matched to its working life and lets you replace the prime mover later without unwinding the trailer finance.
Do I need a B-double contract in place before applying?
Not always, but it helps considerably, especially for a first-time operator. A signed rate agreement or sub-contractor contract gives a lender confidence that the revenue supporting a large exposure is real rather than projected.
Are trailers financed over longer terms than prime movers?
Frequently, yes. Trailers have no driveline to wear out, hold their value well and are often financed over longer periods and to greater ages than the truck hauling them. Refrigerated and specialised trailers can be treated more conservatively because of the fitted equipment.
How much deposit is needed for a prime mover?
It varies with the strength of the application. Established, asset-backed operators buying a mainstream unit can often proceed without one, while newer businesses, older trucks or impaired credit histories usually attract a deposit requirement. A deposit also reduces exposure if values move against you.
Can I finance a road train combination the same way?
Broadly, yes, though the exposure is larger and the assessment more detailed given the number of assets, the converter dollies involved and the access arrangements required. Lenders will look closely at the operating routes, the work supporting the combination and your experience with that class of vehicle.
Putting a prime mover and trailer set together is a bigger commitment than most operators expect on their first go, and getting the structure right at the start saves a lot of grief later. Speak to real people who work on these deals every week: call 1300 894 894 or send your combination details through the contact page and we will structure it around how you actually intend to run it.