When you start auditing carrier invoices, the first number that jumps out is variance: the total dollar difference between what a shipment was quoted and what you were actually billed. It is a useful number. It is also the easiest one to misread.
A founder we work with saw the variance figures from a fresh evaluation and asked the natural question: does this mean we can go get all of it back?
Mostly, no. And being clear about that early is what keeps the evaluation credible.
Variance is not the same as an overcharge
The total variance lumps together two very different things:
- Legitimate adjustments. Re-weighs, dimensional corrections, customs charges, address corrections, surcharges that genuinely apply. The carrier billed these correctly. They are not coming back, no matter how cleanly you file.
- Actual overcharges. Errors, misapplied surcharges, charges that violate your contracted rates. This is the disputable slice, and it is usually a fraction of the headline number.
Quoting the full variance as "recoverable" sets up a disappointment. The honest move is to separate the two before anyone builds a recovery expectation around the big number.
The window matters more than the total
There is a second constraint that the variance total hides: timing. Carriers generally require overcharges to be disputed within about 30 days of the invoice date. Miss the window and even a clean, valid dispute is dead.
That reframes where the value actually is:
- Backward-looking recovery is capped. Some past variances are already outside the window and gone, and much of what remains was never disputable to begin with.
- The real value is forward. Once you are auditing weekly, you catch the disputable overcharges and file them inside the 30-day window, before they expire. Recovery becomes a steady process instead of a one-time treasure hunt.
So when an evaluation hands you a variance number, resist reading it as a refund check. The right next step is to break it into disputable versus legitimate, confirm what is still inside the window, and then build the weekly cadence that catches the real overcharges before the clock runs out. That discipline is the same reason a rate reseller's headline savings rarely survive contact with the invoice: the topline number and the recoverable number are not the same thing.