Cass Freight Index: Truckload Linehaul Rates Rise 6.9% YoY in 17th Straight Monthly Gain, H2 Volume Recovery Expected

The Analysis

The Cass Freight Index for May 2026 says truckload linehaul rates rose 6.9% year over year, the seventeenth straight monthly gain and the largest increase in nearly four years. The same report says multimodal shipments dipped just 1.2% year over year, the smallest decline in 18 months, and the first turn after 40 months of year-over-year declines. Cass is now projecting a 1.8% year-over-year volume increase in the second half of 2026. Those are the numbers. They are also where most readers stop.

Stop there and the story sounds clean: rates up, volume about to recover, lock your contracts before it gets worse. Put the two prints side by side and the clean story falls apart. Rates are up almost 7% while volume is still down. Price is rising without demand rising. That is not a demand recovery. That is a supply constraint wearing a demand recovery's clothes, and the two do not age the same way.

So I take the number apart first. What exactly is the 6.9%. What is inside it, what is left out, and what base it is sitting on. Then we work out what to lock, at what price, and by when. Numbers first. Feelings can wait.

Start with what the 6.9% is not. It is the linehaul rate: the base charge for pulling a loaded trailer from origin to destination. It is not the fuel surcharge, which resets on its own index and its own schedule. It is not the accessorials either, which means detention, layover, stop-off, liftgate, the small stack of line items that show up on the invoice after the linehaul and can quietly outrun it. When someone forwards you a Cass headline and says trucking is up 7%, the precise answer is: the base is up 6.9%; your invoice will move by whatever the base plus the surcharges do together, and the surcharges are not in this number at all. That gap matters most in a quarter when fuel is moving. A linehaul that is up 6.9% and a fuel surcharge that is down can net to the same invoice you paid a year ago, and then nobody is up 7% except the slide.

Then look at the base that 6.9% sits on. Seventeen consecutive months of year-over-year gains reads like a market that has been climbing for a year and a half. Read the level, not the streak. The 40 months of declines that came before this recovery took the rate a long way down. A 6.9% year-over-year gain measured against a depressed base is a bounce, not a breakout, and seventeen months of increases off a deeply discounted starting point can still leave the absolute rate below where it stood before the downcycle started. The streak is a statistic you put on a slide. The level is the number in your freight budget. They are not the same number, and this market is currently selling the first one hard.

The phrase largest increase in nearly four years tells you something the streak does not. It says the pace just accelerated. Seventeen months of small gains and one month of near-record gain are two very different markets. A long string of modest increases is a market grinding; a burst at the end of the string is a market that just got hit by something. The report points at supply for the burst, which is the honest read. But it also means you are being asked to price a contract at the fastest point of the move, not in the middle of it. Nobody wants to sign at the top of a step.

The volume print deserves the same treatment. A 1.2% year-over-year decline being called the smallest decline in 18 months and a positive inflection can be entirely true and still leave your volume down. An inflection is about the direction of the change, not the direction of the volume. Freight that is down 1.2% is down. What has turned is the slope; the level is still below zero, and it has been below zero for 40 months. Planners who treat a change in the second derivative as a change in the level get burned in exactly this part of a cycle. They start building stock on the strength of a turn that has not arrived, they pay spot rates to do it, and then they discover the turn was only in the rate of change.

So why are rates up while volume is flat to down. The report names the forces, and every one of them is on the supply side. Tighter commercial driver's licence enforcement pulls marginal capacity off the road. Driver exits shrink the pool further. A Supreme Court ruling on broker liability raises the legal and insurance cost of assembling capacity through intermediaries, which either reprices that capacity or removes it. None of those three is a shipper deciding to buy more freight. All three make it harder to put a truck under a load. When the constraint is how you supply trucks rather than how much freight there is, price rises on scarcity, not on demand, and a market priced on scarcity behaves nothing like a market priced on growth.

That difference has a clock attached. Constraints built on drivers, licences, insurance and courts are slow to fix on the way up and can move in a single step on the way down. Hiring and training a driver takes time, so the upward pressure does not evaporate next month; it keeps a floor under the rate into the second half. But two of the three constraints here are legal, not cyclical. A broker liability ruling can be narrowed, clarified or appealed. An enforcement posture can change on an agency decision. A legal floor holds firm and then moves in a jump, and a jump is not something a twelve-month fixed contract is priced to absorb. So the floor under this rate move is real, and it is also thinner than it looks, because the thing holding it up is a decision, not a shortage of freight.

There is also a dispersion problem inside the national number. A country-wide index bundles lanes that have nothing to do with each other. The lane out of the market where driver enforcement bites hardest is moving on scarcity; the lane with three competing carriers and soft volume is not moving at all. A 6.9% national print can be an 11% move on your lane and a 1% move on the lane next to it. When the tender goes out, the number that matters is the bid on your lane, from your carriers, on your volume, not the national print. The national print tells you why the conversation is happening. It does not tell you what to accept.

One more way to read the streak, because this is where most budgeting mistakes happen. When you benchmark your own rate against a running index, you are comparing a level to a level. If the index is up 17 months in a row but the level is still below its pre-downturn peak, then a carrier's argument that rates have to rise because the market has been rising is an argument about direction, not about where you are. Direction does not pay your freight bill. Ask for the level, in dollars per lane, and compare it to the level you paid two and three years ago. That comparison tells you whether you are being repriced back to normal or repriced above it, and those two cases need different answers at the table.

Be careful with the word recovery, too. A recovery here means the rate is going back toward where it was. If 6.9% off a depressed base only brings the lane back to roughly its pre-downturn level, you are not paying a premium, you are paying a reset to normal, and locking it is cheap insurance. If 6.9% plus another few months takes the lane above its old peak while volume is still negative, you are paying a scarcity premium on top of that reset, and locking it is expensive. The same 6.9% means opposite things depending on where the level sits, and the report hands you the level if you do the arithmetic instead of reading the headline.

There is an outbound side to this, easy to forget when everyone is talking about imports. US exporters moving domestic legs to a port or an airport pay the same linehaul. If your export book is smaller and more sporadic than your import book, you have less leverage and you feel the driver constraint harder, because sporadic volume gets priced at spot almost by definition. The fix is the same arithmetic in reverse: find the lanes where you have recurring, predictable export volume and treat those as the ones worth a fixed rate, while leaving the one-off moves on spot where they belong.

The falling-tariff support deserves a word of caution, because it hits the inland market from two sides. Lower tariffs pull landed cost down and make ordering easier, which supports import volume and therefore inland truck demand. But lower tariffs also mean the tariff-driven frontloading in the ocean market can reverse, and if import volumes normalize later in the year, the inland demand bid softens at the same moment the supply constraint is still in place. The net on your linehaul is not obvious, which is exactly why the trigger rule matters more than the forecast. You do not need to know which way it goes. You need a written rule for what you do in each case.

Who feels it and how hard depends on where you sit. For an importer, the linehaul is the domestic inland leg: the port or rail ramp to your distribution centre, or your DC to the customer. If you import through a US gateway and truck inland, or you run domestic moves out of your own warehouses, this is a direct line in your delivered cost. Large shippers with dedicated contract carriage are partly insulated, because their rates were set before the burst. Spot-exposed mid-size shippers, project freight and surge moves take the full number, and they take it worst on the lanes coming out of the tightest markets. The spread between your contract rate and the spot quote is the number that tells you your true exposure, and right now it is probably wider than the budget assumed.

And then the second half brings the other shoe. Cass projects volume up 1.8% year over year in H2. Add three supports the report lists. Tight inventories mean a restock has to buy truck capacity and not only goods. A soft dollar makes US production and export replacement more competitive. Falling tariffs lower landed cost and make it easier to place orders. None of those is enormous alone. Together they put a demand bid under a market that is already short of drivers. If they land at the same time, this is the rare quarter where supply and demand push the same direction at once, and that is the setup where linehaul rates do not drift, they gap.

Let us put real numbers on it, and label which ones are mine. From the report: linehaul up 6.9% year over year in May; multimodal shipments down 1.2%; H2 volume projected up 1.8%. Assumptions, clearly marked as mine: your main inland lane runs about 2,000 dollars per container on the linehaul line, and you move 40 containers a month. A 6.9% move on 2,000 dollars is 138 dollars per container. Forty containers is 5,520 dollars a month, or 16,560 dollars a quarter, from the rate move alone. Now add the H2 demand bid. If a 1.8% volume increase meeting a driver-short market lifts the same lane by another 3% — again my assumption, not a forecast — that is 60 dollars more per container, 2,400 dollars a month. The two together take a 2,000 dollar lane to roughly 2,198, an increase just under 10% on the inland leg.

Run the same model the other way. If the broker liability ruling is narrowed on appeal, or the enforcement posture eases, the supply constraint holding the floor can loosen in one step, faster than any demand cycle could move. Suppose the lane gives back half the gain, 3.5%. That is 70 dollars per container, 2,800 dollars a month, handed back. I am not predicting which way it goes. I am pointing out that this rate move is loaded on one side of the boat: the upside is slow and the downside is a step. Sign a twelve-month fixed contract at the top of a spike like this and you own the step.

So split the book. Separate your inland volume into two buckets by how much warning you get. The predictable, weekly, same-lane freight can be locked, but not at any price. Set a trigger and write it down. If the fixed third-and-fourth-quarter quote comes in under 5% above your current spot rate, sign the fixed portion. If it comes in 5% to 8% above spot, you may still sign, but cap the fixed share at 70% of the lane and keep the rest on spot, because above that spread you are paying a supply-driven premium for certainty.

If the fixed quote is more than 8% above spot, do not sign a long contract; stay spot and lock only the two lanes you cannot afford to miss, and do that no later than 30 days before peak. Then decide who owns the negotiation. The inland contract is the shipper's or the shipper's third-party logistics provider's to run, not the ocean carrier's, and the person who talks to the truckload carrier needs the trigger number in their hand before the next quarterly bid, not after.

Once a week, the person who owns the inland budget should look at four things and nothing else. The Cass linehaul print for the month, to see whether the pace is still accelerating. The Cass shipments print, to see whether the volume decline is finally turning positive in the level and not only in the slope. Your own contract-versus-spot spread, lane by lane, because that is where the pain is felt first. And any news on the broker liability ruling or licence enforcement, because that is the lever that can move your floor in one step. Four numbers, once a week, and you will see this market turn before the headline does. The headline is always the last to know.

Alternatives, and what each one costs. You can push volume to intermodal rail, but rail has its own ramp drayage and its own service variability, and the trucks you still need at both ends are the trucks that are short, so you are not leaving the driver market, you are buying it in smaller pieces. You can rebalance to a different distribution centre so a long lane becomes a short one, but that resets your inventory position and your delivery promise and takes a quarter to re-engineer. You can carry more stock to smooth the restock, but tight inventories are part of why rates are up, so building stock pushes the very lever that is lifting your cost. None of these is free, and none is wrong, as long as you price the trade instead of assuming it.

The traps that cost the most money are the quiet ones. A fixed contract with a volume commitment you miss, which turns a rate win into a penalty. A fuel-surcharge formula that resets on a different index and slowly reverses your linehaul saving. And the accessorials that were never inside the 6.9% and can move the invoice more than the rate did. Ask for the surcharge formula and the accessorial schedule in writing before you sign anything. If the carrier will not put the formula on paper, that itself is information, and it is the kind of information you want before the signature, not after the first detention bill.

So here is the whole thing in one line. The seventeenth straight month, the near-four-year high, the broker ruling and the driver squeeze are not all going to be true next year. My advice is not to price a contract as if they will. Rates this high, moving this fast, on demand this soft, are on loan from the supply side. Loans get called, and they usually get called in the quarter you stopped reading the detail. Pick your trigger, put it in writing, and let the market come to your number instead of chasing it up the lane. The number is the only part of this story that does not have a feeling.

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— By Vivian Zhao