For the first twelve months that 5G NR roaming has appeared meaningfully in settlement files, operators are encountering an uncomfortable arithmetic: inbound visitor volumes are rising, IOT rates have not kept pace with the cost of serving NR traffic, and the per-gigabyte margin that made LTE roaming profitable is quietly compressing. The aggregate looks healthy; the unit economics often are not.
Volume up, margin under pressure
Aggregate inbound roaming revenue across most Tier-1 European and Asia-Pacific operators grew between 8 and 14 percent in H1 2026, continuing the post-pandemic recovery trend. But when that revenue is divided by the gigabytes served — and NR traffic now accounts for a substantial share of data sessions in urban roaming corridors — the per-MB yield is declining in markets where IOT negotiations have not been refreshed since the LTE era.
The gap is structural. NR RAN carries higher depreciation and spectrum costs than LTE. Serving an inbound roamer on NR infrastructure at an IOT agreed in 2022 means the host operator is underwriting part of the visitor's experience. Without granular per-RAT cost allocation in wholesale models, this compression is invisible until a full margin attribution exercise is run.
Where analytics surfaces the gap
Operators running detailed TAP and NRTRDE analytics against their cost ledgers are identifying two inflection points: roamers from partners with stale IOTs generate negative contribution margin on NR sessions longer than approximately 45 minutes, and peak-hour stadium or transport-hub sessions — where NR load is highest — are the most expensive to serve at legacy rates.
The remediation path is bilateral IOT renegotiation, but that requires evidence. Operators arriving at those conversations with per-partner, per-RAT margin attribution data — not just aggregate revenue figures — are achieving meaningfully better outcomes. Those with only summary settlement data are negotiating blind.
Steering strategy as a complement
Where IOT renegotiation timelines are long, some operators are using outbound steering policy as a near-term margin lever. Preferring partners whose IOTs reflect current NR costs — even slightly — improves the reciprocal economics of the roaming relationship over time. This requires cross-referencing outbound steering rules with inbound margin data, a capability that sits in the analytics layer rather than the network layer.
The operators absorbing this lesson fastest are those that have moved roaming analytics from a back-office reconciliation function to a commercially active input into partnership and pricing decisions. The H1 2026 data makes the case for that repositioning more clearly than any prior period.
