Broker margin leakage per load almost never comes from the linehaul rate. It comes from nine line items that move between the moment you cover a load and the moment the payment clears: fuel basis, detention, layover and TONU, lumper and driver assist, delivery accessorials, reconsignment and extra stops, quick pay and factoring deductions, rebills and late fees, and claims offsets. Each one has a distinct signature in your data, and most of them are found with a query rather than an argument.
The linehaul is safe because it is the number everyone looks at. It is on the rate con, it is on the invoice, and a mismatch is obvious to anyone. The other nine arrive later, arrive from a different system, or arrive on only one side of the load.
Below is each one: what it is, why it leaks, and the specific check that surfaces it.
The nine, in one table
| # | Line item | How the margin leaks | The check that finds it |
|---|---|---|---|
| 1 | Fuel surcharge | Buy side and sell side use different index weeks, indexes, or mileage bases | Recompute both sides independently, then compare the inputs, not the outputs |
| 2 | Detention | Paid to the carrier, never billed to the customer, or free time differs by side | Loads with a buy-side detention line and no sell-side detention line |
| 3 | Layover and TONU | Charged as one thing, owed as another; rarely in the customer agreement at all | Every layover or TONU paid in the period, matched against a customer line |
| 4 | Lumper and driver assist | Advanced by you, receipt never captured, so it is unbillable | Advances with no attached receipt image |
| 5 | Delivery accessorials | Liftgate, inside, residential, limited access added at carrier billing stage | Accessorials on the invoice that are absent from the rate con |
| 6 | Reconsignment, diversion, extra stops | Change happened by phone, priced on the buy side only | Loads where the POD address differs from the BOL address |
| 7 | Quick pay and factoring deductions | Discount applied at the wrong rate or on the wrong base | Recompute the deduction against the agreed percentage and base |
| 8 | Rebills and late fees | Land after the load is closed and after the customer invoice went out | Any carrier invoice received more than 30 days post-delivery |
| 9 | Claims offsets | Cargo loss netted against freight charges instead of claimed | Any manual deduction on a settlement with no claim file number |
Read the right-hand column as a work queue. Seven of the nine are database questions, not judgment calls, which is why this is a systems problem rather than a staffing one.
1. Fuel surcharge: two formulas that drift
Fuel is the largest recurring accessorial on most truckload loads, and it is the one most likely to be wrong on both sides in different directions.
A fuel surcharge program has three inputs, and every one of them is a contractual choice: which index, which week of that index, and what mileage basis. Get any of the three different between your carrier agreement and your customer agreement and you hold an unintended position that moves with diesel.
The index itself is public and precise. The EIA’s On-Highway Diesel Fuel Price Survey captures the cash self-serve pump price including taxes as of 8:00 a.m. local time Monday and publishes around 10:00 a.m. ET Tuesday, per the EIA’s methodology page. Because publication lags collection, “the current DOE price” is genuinely ambiguous for a load moving Monday or Tuesday. Name the release explicitly rather than relying on the word “current”.
The check: do not compare the carrier’s fuel dollar to the customer’s fuel dollar. Recompute each from its own contract using the standard truckload fuel surcharge calculation, then compare inputs. Two numbers that differ tell you there is a problem. Two sets of inputs tell you which clause to fix.
2. Detention: the structural leak
Detention is the single largest recurring source of broker margin leakage per load, for three reasons that all compound.
It arrives late. The carrier discovers the dwell when the driver submits paperwork, often after you have invoiced the customer, and re-billing costs goodwill, so it frequently does not happen.
It requires evidence your customer will contest. The carrier hands you a claim; you have to hand your customer a defensible one. If the POD carries no in and out times, you are in the position described in disputing a detention charge with no POD times, on both sides at once.
And free time is often asymmetric. If your carrier rate con gives two hours free and your customer agreement gives three, the third hour is unbillable by construction. That is not a leak you find in an audit, it is one you signed.
The check: a report listing every load with a buy-side detention charge and no matching sell-side line. Then a second report comparing free-time hours across your standard carrier terms and your top customer agreements. The second report is the one that changes your P&L.
Fixing the evidence side is worth doing once, properly. The documents that make a detention claim stick are the same set your customer will demand, and what event starts the free-time clock is the clause that decides whether an hour is billable at all.
3. Layover and TONU: different charges, one habit
Layover and truck ordered not used are both “the truck was committed and the freight was not ready”, but they are not the same charge and they are not owed in the same situations.
TONU applies when a dispatched truck is cancelled before loading. Layover applies when a truck is held overnight and works the next day. Carriers sometimes bill whichever one their system defaults to, and brokers pay whichever arrives, because both feel like fair pay for the same inconvenience.
The margin problem is separate from the fairness problem. Most customer agreements do not name layover or TONU at all, so the charge is real on the buy side and undefined on the sell side. That makes it a negotiation every time rather than a contract term.
The check: pull every layover and TONU you paid in a quarter and see how many appear on a customer invoice. If it is few, you need both charges named in the customer agreement with a rate, not a conversation.
4. Lumper and driver assist: the receipt problem
Lumper fees are usually a pure pass-through, which makes them look like a non-issue. They leak anyway, almost always for the same reason: the receipt.
You advance the lumper to the driver or pay it at the dock. Reimbursement depends on a receipt that exists as a photograph on a phone. If it never reaches your file, you have a charge you paid and cannot substantiate, and a customer entitled to ask you to.
The check: every advance with no attached document, grouped by facility. Concentrations by facility are the useful output, because some receivers are systematically worse at producing receipts and those lanes should be priced accordingly.
The related trap: lumper, sort and segregate, and driver assist are three distinct services frequently billed under whichever code the carrier’s system offers. Paying a sort-and-segregate charge coded as lumper is fine as long as you know which service happened, because that decides whether your customer agreement covers it.
5. Delivery accessorials added at the billing stage
Liftgate, inside delivery, residential, and limited access share a mechanic: they are frequently added by someone at the carrier’s billing desk who never saw the facility, based on an address classifier or a driver note typed after the fact.
These are the easiest to dispute and the easiest to catch, because they fail a simple test: the charge is on the invoice and not on the rate con. The two-document proof that beats them is worked through in disputing a liftgate fee on a dock-to-dock delivery, and the same structure applies to the rest of the family.
Be fair about it. Some of these charges are genuinely owed and simply were not foreseeable at tender: a receiver that changed its dock hours, a site that turned out to be gated. The question is not whether the carrier deserves to be paid for work performed; it is whether the record shows the work happened, and whether the charge reaches your customer invoice when it does.
The check: accessorial codes present on the carrier invoice and absent from the rate con, ranked by frequency and by carrier. Frequency is what separates a one-off from a billing default.
6. Reconsignment, diversion, and extra stops
Address changes are the most expensive phone call in freight. The customer calls dispatch, dispatch calls the carrier, the truck goes somewhere else, and the only written record is a text message. The carrier bills the diversion, correctly, because the miles happened. Your customer invoice was built from the original tender. Nobody is at fault and the margin is gone.
The check: loads where the delivery address on the POD does not match the address on the BOL or the original tender. Run it weekly, not monthly, because the customer conversation gets harder with age. The fix is a process one: any address change requires written confirmation from the customer naming the additional charge, before the truck moves. That is a one-line email, and it converts an argument into a billable line.
7. Quick pay and factoring deductions
Quick pay is a discount you are entitled to take, on terms in your carrier agreement, and what that discount annualizes to for the carrier is worth knowing before you set the rate. It leaks in three ways.
The rate is wrong: the agreement says a percentage and the settlement system applies a flat fee, or vice versa. The base is wrong: the discount computes on linehaul plus fuel plus accessorials when the agreement says linehaul only, or the reverse. And the entitlement is wrong: the discount is taken on an invoice paid outside the quick-pay window, which you will have to give back.
Factoring adds a wrinkle. When a carrier’s receivable is assigned to a factor, payment has to go to the factor, and paying the carrier directly after a valid notice of assignment can leave you paying twice. That is a legal and contractual matter, not a freight billing rule, so have counsel set the internal policy rather than letting settlement improvise one.
The check: recompute every quick-pay deduction against the agreed percentage and base for that carrier, and flag any deduction taken on an invoice paid after the window. Both are arithmetic.
8. Rebills and late-arriving invoices
An invoice that shows up sixty days after delivery is a margin problem regardless of whether it is correct, because your customer invoice closed long ago.
Know the statutory framing precisely. Under 49 U.S.C. 13710, a carrier billing charges additional to those originally billed must do so within 180 days of the shipper’s receipt of the original bill to preserve its collection rights, and the billed party has 180 days from receipt to contest a bill. Note what that is and is not: it governs carrier billing and contesting rights, not terms between a broker and its customer. Your ability to re-bill a customer for a late carrier charge is set by your customer agreement. If that agreement is silent, you are asking for a favor.
Also check whether the late arrival is a rebill at all. A carrier invoice for a load you already paid, under a new invoice number, is a duplicate, and the patterns that separate the two are in detecting duplicate freight invoices. Duplicates are a real risk in a settlement queue because you pay hundreds of carriers on different cycles, and one load can surface under a PRO number, a load number, and a factor’s reference.
The check: every carrier invoice received more than 30 days after delivery, flagged for a billability decision before it is paid. Plus a duplicate scan keyed on load identifiers, running across months rather than within a single week.
9. Claims offsets that should have been claims
The last one is the most expensive per occurrence and the least frequent. When freight is damaged or short, the instinct at settlement is to deduct the value from the carrier’s next payment. It feels efficient. It converts a cargo claim, which has a defined process and defined deadlines, into a payment dispute, which does not.
A valid claim under 49 CFR 370.3 must be written, identify the shipment, assert carrier liability, and demand a specified or determinable dollar amount. A bad-order report is not a claim, and “$100 more or less” is not a determinable amount. Once filed, 49 CFR 370.5 requires the carrier to acknowledge in writing within 30 days and assign a file number, and 49 CFR 370.9 requires it to pay, decline, or make a firm written compromise offer within 120 days, with written status reports at 120 days and every 60 days after.
None of that runs if you just took a deduction. And the time limits are protected: under 49 U.S.C. 14706, a carrier cannot impose a claim-filing period shorter than 9 months or a suit period shorter than 2 years from written disallowance.
The check: any manual deduction on a carrier settlement with no associated claim file number. Every one of those is a claim you did not file.
What to do this month
- Run the asymmetry report: buy-side accessorial present, sell-side line absent. Rank by dollars. That is your leak list, ordered.
- Compare free-time hours, fuel index, index week, and mileage basis across your standard carrier terms and your top five customer agreements. Write down every mismatch and price it per load.
- Pull every layover, TONU, reconsignment, and diversion paid last quarter and check how many reached a customer invoice.
- List advances with no receipt on file, grouped by facility.
- Recompute quick-pay deductions against the agreed rate and base, and flag any taken outside the window.
- Flag carrier invoices arriving more than 30 days after delivery, and decide billability before you pay.
- Find manual deductions with no claim file number and convert them into written claims while the deadlines are still open.
The pattern across all seven: the leak is almost never a wrong number on a document. It is a right number on one document and nothing at all on the other. Comparing two invoices cannot see that, which is why the three-way match in carrier settlement reconciliation for 3PLs at scale is the frame this list sits inside.
Sources
- EIA On-Highway Diesel Fuel Price Survey methodology (U.S. Energy Information Administration)
- 49 U.S.C. 13710, Billing and contesting windows (Cornell LII)
- 49 U.S.C. 14706, Carmack Amendment claim and suit periods (Cornell LII)
- 49 CFR 370.3, What constitutes a valid claim (Cornell LII)
- 49 CFR 370.5, Carrier acknowledgment of claims within 30 days (Cornell LII)
- 49 CFR 370.9, Claim disposition within 120 days (Cornell LII)
- Top 20 accessorial charges, practitioner taxonomy (Zipline Logistics)