Interstate moving estimates can be priced by weight or by cubic feet, and the difference determines your legal rights. Federal law requires non-binding estimates to be based on weight. Cubic-foot pricing is only lawful on a binding estimate. If a mover quotes you by cubic feet and tells you the price might change, they have already violated federal law before the truck arrives.
This is the most important thing a consumer can understand before signing a moving contract, and almost nobody explains it. I spent nearly twenty years inside this industry. The pricing method is not a technical detail. It is the entire foundation of how a move goes right or wrong.
What does the law actually require?
Under 49 U.S.C. 14104(b)(1)(C), a non-binding estimate must be based on weight. That is not a guideline. It is the statutory requirement.
Cubic-foot charges are permitted, but two conditions must both be met:
- The mover’s published tariff must provide for cubic-foot pricing
- The estimate must be binding
Carrier tariffs state this plainly: where linehaul is charged by cubic feet or by hourly rate, the estimate has to be binding. There is no such thing as a lawful non-binding cubic-foot estimate on an interstate household goods move.
| Pricing method | Estimate type allowed | You pay at delivery | Can they verify it? |
|---|---|---|---|
| Weight | Binding or non-binding | 100% or up to 110% | Yes, certified scale |
| Cubic feet | Binding only | 100% | No independent verification |
| Hourly linehaul | Binding only | 100% | No independent verification |
Why does weight protect you and cubic feet does not?
The difference comes down to one thing: whether an independent third party can check the number.
Weight is verifiable. When your charges are based on weight, the carrier must obtain a certified weight certificate from a certified scale. They weigh the truck empty (tare weight) and loaded (gross weight), and the difference is your shipment. You have the right to observe the weighing after reasonable notice, and you can request a reweigh.
That means a third party with no stake in the outcome produces the number that determines your bill.
Cubic feet is not verifiable. The volume of your shipment is measured by the operator, in the operator’s truck, with your belongings loaded however they choose to load them. Load loosely and the same furniture occupies more space. Nobody independent ever sees it.
And here is the part that matters most: binding cubic-foot estimates are exempt from the weight certificate requirement under 49 CFR 375.507. No certificate. No scale ticket. No document to produce if you challenge the charge.
That exemption is precisely why the law only permits cubic-foot pricing on a binding estimate. If the number cannot be verified, the price has to be locked. The moment an operator uses cubic feet and reserves the right to change the price, they have combined the two features that make consumers defenseless.
How do I tell which one I have?
Look at your written estimate and find two things:
- The unit of measure. Does it say pounds (lbs) or cubic feet (cf / cu ft)? Somewhere on the document there will be a quantity figure. Something like “7,200 lbs” or “1,100 cu ft.”
- The word binding or non-binding. Federal rules require the estimate to state which it is. If it does not say, that omission is itself a problem.
Then check the combination:
- Weight + non-binding → lawful. You pay up to 110% at delivery, remainder billed later with at least 30 days to pay
- Weight + binding → lawful. You pay 100%
- Cubic feet + binding → lawful. You pay 100%, and the number cannot move
- Cubic feet + non-binding → not lawful. Document it and keep it
That last combination is the one to watch for, and it is far more common than it should be.
Why do rogue operators prefer cubic feet?
Because it makes the final price a matter of their opinion.
The standard sequence looks like this. A low cubic-foot estimate wins the booking, often below what the job genuinely costs. The crew arrives and loads. Somewhere during loading, the customer is told the shipment is taking up considerably more space than estimated. A revised figure appears, usually well above the original, and payment is demanded before delivery.
There is no scale ticket, because none is required. There is no third party who measured anything. It is the customer’s word against the operator’s, with the customer’s belongings already on the truck.
Compare that with a weight-based move where the customer asks for the weight tickets. Now there is a document, produced by a certified scale, that either supports the charge or does not.
What should I insist on before signing?
- Ask directly: is this priced by weight or cubic feet? An honest operator answers in one word.
- If cubic feet, insist it be marked binding in writing. This is not a favor you are asking for. It is what the law requires.
- Prefer binding not-to-exceed where available. You pay the lower of the estimate or the actual charges, so a lighter shipment saves you money and a heavier one cannot hurt you.
- Insist on a survey. For pickup within 50 miles of the mover’s location, FMCSA requires a physical or virtual survey. Demand one anyway if you are further out. A price built from a phone conversation is a price built to change.
- For weight-based moves, say you intend to observe the weighing. You have that right. Simply stating that you plan to use it changes how the job is handled.
What if my estimate is cubic feet and non-binding?
You have found a violation, and it is worth knowing what to do with it.
Before the move: raise it in writing and ask for a corrected binding estimate. How they respond tells you everything. A legitimate company fixes the paperwork. A rogue operator argues, deflects, or pressures you about the date. If it is the second, cancel while you still can.
After loading, if they demand more: put it in writing that the estimate was priced by cubic feet, that federal law requires cubic-foot estimates to be binding, and that you are paying 100% of the binding amount. State that federal law requires release of the shipment on that payment.
Either way: file a complaint at nccdb.fmcsa.dot.gov. It takes about fifteen minutes and becomes part of the company’s permanent record. FMCSA uses complaint volume to decide which companies to investigate.
Frequently asked questions
Is it illegal for a moving company to charge by cubic feet?
No, cubic-foot pricing is legal, but only on a binding estimate and only where the mover’s tariff provides for it. A non-binding cubic-foot estimate on an interstate household goods move is not lawful.
Does the 110% rule apply to cubic-foot estimates?
No. The 110% rule applies to weight-based non-binding estimates. Because cubic-foot pricing requires a binding estimate, you pay 100% of the estimated amount and there is no 110% allowance for the mover to claim.
Can I ask to see the weight tickets?
Yes, for any shipment priced by weight. The carrier must obtain a certified weight certificate, and you have the right to observe the weighing after reasonable notice. You can also request a reweigh.
Which is cheaper, weight or cubic feet?
Neither is inherently cheaper. The real difference is verifiability. Weight-based charges can be checked against a certified scale. Cubic-foot charges cannot be independently verified, which is why the law requires them to be binding.
What if my estimate does not say whether it is binding?
Federal rules require the estimate to state which type it is. An estimate that does not say is defective, and that works in your favor rather than the mover’s. Get clarification in writing before the move.
Related reading
- Can a moving company legally charge more than the estimate?
- What to do when movers won’t deliver your belongings
- Red flags in a moving quote
- How to write a demand letter to a moving company
- How to check if a moving company is licensed and insured
Related
What to do when movers won’t deliver your belongings
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