Freight revenue per revenue ton-mile measures how much freight revenue a railroad earns for each revenue-producing ton moved one mile. Railroads may report it in dollars or cents per RTM and often describe it as a measure of freight yield.
It is useful, but it is not a pure measure of price.
Formula
1Freight Revenue per RTM = Freight Revenue ÷ Revenue Ton-MilesIf a railroad earns $6 billion of freight revenue on 100 billion RTMs, freight revenue per RTM is 6 cents.
Why investors use it
The metric links freight revenue to the amount of distance-weighted freight work performed.
A useful high-level decomposition is:
1Freight Revenue ≈ Revenue Ton-Miles × Freight Revenue per RTMThat lets investors ask whether freight revenue growth came mainly from more traffic, higher yield per RTM, or both.
Yield is not pure pricing
A higher freight revenue per RTM does not automatically mean the railroad raised underlying rates by the same percentage.
The metric can move because of:
- contractual rate changes;
- commodity and customer mix;
- origin-destination mix;
- length of haul;
- fuel surcharge revenue;
- foreign-exchange movements for cross-border operators;
- accessorial or other freight-related charges; and
- changes in how traffic is classified.
CPKC explicitly describes freight revenue per RTM as an indicator of yield while separately attributing changes to freight rates, fuel prices, foreign exchange, and mix.
Revenue per RTM versus revenue per carload
Freight revenue per carload divides revenue by shipment units. Revenue per RTM divides revenue by weight-and-distance freight work.
Those measures can move in opposite directions when length of haul or commodity weight changes.
For example, a railroad may earn more revenue per carload because shipments travel farther even if revenue per RTM is flat. Conversely, a mix shift toward shorter-haul, higher-yield traffic can raise revenue per RTM while lowering revenue per carload.
That is why investors should not treat either denominator as the one universal railroad pricing metric.
Fuel surcharges
Fuel surcharge revenue is especially important when interpreting railroad yield.
When fuel prices fall, fuel surcharge revenue can decline and reduce freight revenue per RTM even if base freight rates rise. When fuel prices rise, the reverse can occur.
This means a lower reported yield can coexist with favorable core pricing, and a higher reported yield can partly reflect fuel surcharge mechanics rather than improved underlying price realization.
Foreign exchange and cross-border railroads
For railroads with substantial operations in multiple currencies, reported freight revenue per RTM can change because of exchange-rate translation.
A Canadian or Mexican revenue stream translated into the reporting currency may move even when local pricing and physical traffic are unchanged. Investors should therefore distinguish reported yield movement from constant-currency economics when the issuer provides enough information.
Mix and length of haul
Revenue per RTM controls for freight weight and distance better than revenue per carload, but it does not eliminate mix effects.
Different commodities, lanes, service levels, and customer contracts can produce very different revenue per ton-mile. A shift toward automotive, premium intermodal, bulk commodities, or cross-border traffic can change the consolidated metric without representing an across-the-board rate change.
Real-world filing context
CPKC's 2025 annual report defines freight revenue per RTM as freight revenue per revenue-producing ton moved one mile and calls it an indicator of yield. Its discussion shows how rates, fuel surcharge revenue, foreign exchange, and traffic mix can all affect the measure.
Sources:
Bottom line
Freight revenue per revenue ton-mile is a useful railroad yield measure, not a clean stand-alone price index. Investors should interpret it alongside RTM growth, carloads, length of haul, commodity mix, fuel surcharges, foreign exchange, and issuer commentary on core pricing.
Part of the Railroad Operating Model
See It in Company Research
These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.
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Compare railroad yield
Compare freight revenue and traffic while separating reported yield from fuel surcharges, foreign exchange, commodity mix, haul length, and core pricing.
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