Market Data

When to Lock Freight Rates: Using the Truck Tonnage Index at 117.70 to Time Carrier Contracts

Rising tonnage tightens capacity and hands pricing power to carriers. A procurement playbook for shippers on how the index, now 117.70, should set the timing of long-term rate commitments.

When the Truck Tonnage Index is rising, shippers should lock multi-year contract rates early, because climbing tonnage signals tightening truck capacity that pushes spot freight prices up before contract rates catch up. The index reads 117.70 as of Apr 2026, climbing, and up about 3.4% from a year ago, per ATA data on FRED, which makes the timing question live for anyone with a truckload bid on the calendar this year.

The capacity mechanics behind the rule

Trucking capacity is slow to add and quick to leave. Trucks, drivers and insurance take quarters to bring on, and carriers exit within weeks when rates fall below operating cost. So when tonnage climbs, the extra freight lands on a near-fixed fleet: utilization rises, tender rejections rise, and the spot market, the real-time price of scarce capacity, reprices first. Contract rates follow at the next bid cycle, typically one to two quarters behind. That lag is the shipper's window. A rising index means today's contract quotes are still priced off yesterday's looser market; a falling index means the same quotes are still priced off yesterday's tighter one, and patience pays instead.

The bid calendar is the lever most shippers under-use. A conventional annual RFP locks rates for twelve months regardless of where the cycle sits, which means a bid that lands late in a loosening market, or early in a tightening one, spends a year on the wrong side of the tape. The alternative is to stagger: put a third of lane volume out to bid every four months, or run targeted mini-bids on the lanes where the spot-contract spread has blown out. Staggering converts one large timing bet into several small ones, and it keeps carrier pricing honest year-round because some portion of your freight is always contestable. The tonnage index is the metronome for that calendar, its direction tells you whether to accelerate the next tranche or let it ride.

The playbook, by regime

What the index level and direction should trigger

• Rising index: accelerate the bid calendar, extend contract terms, and lock core lanes before the spot market finishes repricing. Favor incumbent carriers with dense network fits, they defect last when capacity tightens.
• Falling index: shorten commitments, shift more volume to spot or mini-bids, and reopen lanes where contract rates sit well above the current spot market.
• Flat index: run the standard annual cycle, but instrument it, tender rejection rates and spot-contract spreads will confirm a turn before the tonnage print does.
• Today's configuration: 117.70, climbing, up about 3.4% from a year ago.

One caution on regime-reading: the index tells you about demand for capacity, not the supply of it. The same tonnage level can produce a tight market after two years of carrier bankruptcies or a loose one after a fleet-buying spree, because pricing power lives in the ratio of freight to trucks, not in freight alone. That is why the operational confirmations matter, tender rejection rates above the mid-single digits and a widening spot premium say capacity is genuinely scarce, whatever the index level. Use the tonnage trend to set your posture and the rejection data to set your timing; the two together are a far better contract clock than either alone.

ATA Truck Tonnage Index, Apr 2026 (2015=100): 117.70. Archived range: 112.10 in Oct 2025 to 117.70 in Apr 2026; the latest print sits at the 100th percentile.

The spot market reprices in weeks; contract rates reprice at the next bid. The gap between those two clocks is where freight money is won and lost.

What the timing is worth

Size the decision in dollars. On $1,200,000 of annual truckload spend, locking before a 5% contract-rate escalation is worth $60,000 a year, recurring for the life of the agreement, not a one-time win. And the current tape is already moving: if rates ultimately track the index's present year-over-year change, the drift on that same budget is roughly $41,125 annually. Add the second-order costs of mistiming, expedites and spot buys when committed capacity evaporates in a tightening market, and the tonnage chart earns its place in the transportation procurement calendar. Watch diesel alongside it: fuel surcharges move independently of linehaul, and a well-timed rate lock can still be eroded by an unhedged fuel clause.

Use the carrier rate comparison calculator to weigh contract offers on total lane cost, not just the headline linehaul rate. Compare your carrier bids

Published 2026-07-13.