Evening performance drop exposes the congestion problems telecom policy still misses.

The standard way of evaluating mobile network quality in Europe still leans heavily on aggregate metrics. National median speeds, coverage percentages, and 5G adoption rates are useful, but they flatten the hour-by-hour load profile that determines how networks feel when demand is highest.

Across the 30 markets in this analysis, the most consistent trough in download performance appears between 19:00 and 21:00 local time. We use that window as the evening peak and compare it with 02:00 to 05:00 local time, when demand is lowest. The difference between those windows captures a practical form of congestion: how much performance is lost when shared radio, backhaul, and core resources are under pressure.

This analysis draws on consumer-initiated Speedtest® samples across all 27 EU member states plus Norway, Switzerland, and the United Kingdom during Q1 2026, with trend and seasonality views extending from January 2024 through March 2026. For this article, we developed a peak-hour congestion framework that combines five dimensions of degradation: median download speed loss, loaded latency inflation, queue growth, jitter increase, and the decline in 10th percentile download speeds. The higher the value on the 0 to 100 scale, the more severe the measured peak-hour degradation.

Key Takeaways:

• Spain is Europe’s most congested mobile market at evening peak, with a framework value of 62. Median download speed fell from 161.20 Mbps off-peak to 54.10 Mbps during peak hours in Q1 2026, a 66% drop, while loaded latency increased 60% to 724 ms.
  
• Six markets maintained near-flat daily performance. Luxembourg (~0), Belgium (2), Norway (8), Slovakia (8), France (11), and the Netherlands (12) sit in the resilient tier, each with distinct structural characteristics across data-usage intensity, population mobility, and network density that help mitigate congestion.
  
• Switzerland is the clearest example of why headline metrics alone are insufficient. Despite having Europe’s highest mobile ARPU at €50.90 (US$59.58) per subscriber and a 74% 5G connection share, Switzerland has the third-highest congestion value in the analysis at 47. Its median speed drop is moderate, but loaded latency rises 46% and the bottom 10% of users see download speeds fall 81%, from 25.50 Mbps to 4.80 Mbps.
  
• Investment intensity and network management explain more than wealth, spectrum holdings, or market concentration. Capex as a share of revenue shows the strongest relationship with congestion resilience among the structural variables tested, although it is a moderate relationship rather than a deterministic rule. Operator gaps reinforce the point: in Poland, the evening-peak gap between T-Mobile and Plus is 4.1x, compared with 2.2x off-peak, meaning peak load can amplify rather than merely reflect baseline differences.
  
• 5G improves the experience under load, but it does not remove congestion. Across 10 high-5G European markets, the average speed drop at peak is 32% for 4G and 27% for 5G. The more consistent 5G advantage is latency: 5G loaded latency at peak is 12% to 44% lower than 4G in every market tested.
  
• Seasonality materially changes the congestion picture. Spain and Croatia show repeated summer pressure linked to tourism, Nordic markets show a summer shift toward rural and holiday-home locations, while Switzerland and Austria see congestion ease in summer, pointing to winter demand concentration at ski resorts as the sharper stress pattern.

Network Congestion Is a Regulatory Blind Spot

Mobile networks operate over a shared radio medium where spectrum is finite and the capacity of each cell sector is bounded by spectral efficiency, antenna configuration, interference management, and backhaul dimensioning. Unlike fixed broadband, where each subscriber typically has a dedicated last-mile connection, every mobile user in a cell sector draws from the same pool of radio resources.

When simultaneous demand exceeds what the available spectrum, radio configuration, and transport layer can deliver, per-user throughput falls, latency increases as queues build in network buffers, and the experience of every user on that sector deteriorates in tandem. This is why congestion is not just a speed issue. It is also a latency, consistency, and worst-user issue.

The challenge is compounded by the geographic unpredictability of mobile demand. Operators must dimension networks for the busiest hour of the busiest day, even though average utilization is far lower. They must also do so across thousands of sites where traffic patterns shift with commuter flows, events, tourism, and seasons.

Despite this, most regulatory benchmarks and national performance reports still do not distinguish clearly between off-peak and peak-hour outcomes. The EU’s Digital Decade targets specify gigabit networks for all households and 5G coverage for all populated areas by 2030, but they do not set a comparable benchmark for performance under load.

BEREC’s 2024 implementation report on geographical surveys of network deployment also illustrates the difficulty. Expected peak-time speed is treated as one of the more challenging indicators for regulators to collect and standardize, and mobile quality-of-service reporting remains uneven across markets. The European Commission’s proposed Digital Networks Act may help simplify investment conditions, but it does not remove the need for better evidence on how networks perform during the hours of greatest demand.

Profiling Congestion Requires Looking Beyond Headline Speed

The congestion framework used for this article combines five dimensions of peak-hour degradation, each capturing a different facet of user experience. Throughput loss, weighted at 30%, measures the drop in median download speed from off-peak to peak. Loaded latency inflation, also weighted at 30%, captures how much delay increases during active data transfer, a direct indicator of network queuing that affects video calls, gaming, interactive web browsing, and increasingly AI-enabled real-time applications.

Queue growth, weighted at 20%, isolates congestion from baseline network quality by measuring how the gap between idle and loaded latency widens. Jitter inflation, weighted at 10%, reflects the stability degradation that impairs real-time communication. The 10th percentile download drop, weighted at 10%, captures how much the worst-served users suffer, which is especially relevant to policy debates about universal service quality.

Loaded latency is particularly important. A network can maintain superficially reasonable throughput while loaded latency rises from 400 ms to 700 ms or more, degrading video calls, increasing application response lag, and creating a perceptibly worse user experience that median speed alone does not reveal.

A Wide Peak-Hour Gap Separates Europe’s Best and Worst Mobile Markets

The 30 markets analyzed segment into four tiers when applying the congestion framework used for this research. The top and bottom of the distribution are not separated by marginal differences. Spain’s framework value of 62 is more than five times the Netherlands’ 12 and roughly eight times Norway’s 8.

Six markets are congestion-resilient: Luxembourg, Belgium, Norway, Slovakia, France, and the Netherlands. These markets maintain near-flat performance profiles across the day. The Netherlands delivers 157.90 Mbps at evening peak, just 15% below its off-peak level. Norway’s loaded latency varies by fewer than 70 ms across the 24-hour cycle.

Belgium and Luxembourg show speed gains, meaning evening peak speeds actually exceed their nighttime baseline, likely reflecting business-hour demand relaxation (unsurprising in Luxembourg where many commute into and out of the country each day for work) and, in some cases, overnight energy-saving configurations that reduce available radio capacity (i.e., disabling higher bands and features like higher order carrier aggregation) during the off-peak reference window.

Eleven markets fall into the moderate tier. Speed drops here range from around 30% to more than 45%, but absolute peak performance varies significantly, from Bulgaria’s 142.80 Mbps to Romania’s 62.10 Mbps. Germany, Europe’s largest mobile market by revenue, sits in this tier with a 34% speed drop and a congestion trajectory that has been quietly worsening.

Ten markets show significant congestion. Italy, hosting the EU’s most fragmented mobile market structure (by HHI concentration), delivers just 45.20 Mbps at peak, the lowest absolute peak speed of any major EU economy in the analysis. The Herfindahl-Hirschman Index (HHI) is a measure of market concentration: lower values indicate a more fragmented (or competitive) market structure. This potentially reflects the real-world network quality costs imposed by the market’s historical focus on price competitiveness.

Three markets face severe congestion: Switzerland, Ireland, and Spain. All three are three-operator markets (although DIGI is building a fourth network in Spain) and all three feature below-average capex intensity. Ireland and Spain also combine low to medium ARPU, high mobile data usage, and widespread unlimited or near-unlimited tariffs, which likely contribute to higher load pressure per subscriber despite high FTTH penetration.

The three Benelux markets form a notable cluster at the resilient end of the scale. Their shared characteristics, including small and dense geography, high urbanization, strong fixed broadband penetration supporting Wi-Fi offload, mature three-operator market structures (changing as DIGI becomes a fourth operator in Belgium), and less exposure to national-scale seasonal coastal tourism, appear to create structural conditions that resist congestion.

Speed Rankings Alone Disguise Severe Latency Degradation in Europe’s Wealthiest Markets

Switzerland’s congestion outcomes challenge several assumptions about what makes a well-performing mobile market. It features the highest mobile ARPU in Europe at €50.90 (US$59.58) per subscriber (based on GSMA Intelligence data), the highest 5G connection share at 74%, and 99% reported outdoor 5G population coverage. In aggregate speed terms, Switzerland would not look like an obvious congestion outlier.

Under the congestion framework, however, Switzerland ranks third-worst in Europe with a value of 47. The headline speed drop of 36% appears moderate. But loaded latency inflates 46% at peak, and the bottom 10% of Swiss users experience an 81% collapse in download speed, from 25.50 Mbps off-peak to 4.80 Mbps at peak. This 10th percentile collapse is the worst of any market in the analysis, meaning the most vulnerable Swiss mobile users, likely those in congested urban cells or at the edge of coverage, effectively lose functional mobile broadband during evening hours.

Operator-level data identifies the specific source of the problem. Sunrise, which holds approximately 27% of the Swiss mobile market with 3.1 million mobile customers, shows a 73% speed drop at peak, falling from 164.00 Mbps off-peak to 44.50 Mbps. Its loaded latency inflates 57% and its 10th percentile download speed falls to 3.10 Mbps. Swisscom, operating in the same geography with approximately 54% market share, drops 31% and maintains 97.90 Mbps at peak with a 10th percentile download speed of 10.60 Mbps. Salt, the third operator, falls between the two with a 41% speed drop.

The difference is not simply that Swisscom is faster in general. Off-peak, the gap between the fastest and slowest Swiss operator is only 23.40 Mbps, or 1.17x. At peak, the gap expands to 53.40 Mbps, or 2.2x. Evening demand therefore exposes an operator-level resilience gap that is mostly hidden overnight.

Spectrum holdings provide part of the explanation. Swisscom holds 743 MHz of total assigned spectrum, including 613 MHz of mid-band capacity across the 1500, 1800, 2100, and 2600 MHz bands. That is roughly 2.7x the mid-band depth available to Sunrise (224 MHz) or Salt (220 MHz). Because Swisscom also serves a larger customer base, that advantage is less dramatic on a per-subscriber basis, but it remains directionally favorable. The fact that Salt has broadly comparable mid-band depth to Sunrise yet manages a materially better peak outcome suggests that deployment, traffic mix, site configuration, and network management matter alongside raw MHz.

Switzerland also presents a useful caution on investment interpretation. Its capex-to-revenue ratio is the lowest in the analysis at approximately 10% (based on GSMA Intelligence data), but absolute capex may look less weak because Swiss ARPU is high. The ratio still matters because it measures reinvestment intensity: how much of a high-revenue market is being put back into capacity.

Regulation may also contribute. Switzerland’s non-ionizing radiation rules are more precautionary than the international exposure limits used in many other markets, and new or modified antenna installations must demonstrate compliance. These rules do not explain the Sunrise-Swisscom gap on their own, but they can raise the practical complexity of densification and capacity upgrades. The combination of high ARPU, low reinvestment intensity, strict site constraints (forcing high grid density), and large operator-level dispersion points to a market where headline metrics mask material quality-of-experience gaps that only become visible under demand pressure.

Intra-Market Differences Can Exceed Inter-Market Gaps

Our operator-level analysis shows that congestion outcomes within a single country can diverge more sharply than outcomes between countries. Four markets illustrate different patterns.

Spain, for example, shows a high-ceiling, high-collapse pattern. Orange, operating as part of MasOrange following the 2024 merger with MasMovil, delivers 329.40 Mbps off-peak, among the fastest off-peak speeds recorded for any operator in any market in this analysis. By evening peak, this falls 72% to 91.20 Mbps, with the 10th percentile dropping 91%. The raw network capacity demonstrably exists. The challenge appears to be distributing that capacity under concentrated evening demand, a pattern consistent with the complexity of post-merger network integration and traffic migration.

Movistar starts from a more moderate off-peak level of 120.00 Mbps but drops just 26% and maintains 89.20 Mbps at peak. Vodafone Spain shows the weakest absolute peak performance at 27.30 Mbps, with loaded latency reaching 1,189 ms.

Poland shows an investment-divergence pattern. T-Mobile delivers 99.50 Mbps at peak with a 10th percentile download speed of 11.80 Mbps. Plus manages 24.30 Mbps with a 10th percentile of 1.90 Mbps. The 75.20 Mbps gap between operators serving the same country is the largest intra-market spread in our analysis. Crucially, the off-peak gap is much smaller proportionally: T-Mobile is 2.2x faster than Plus off-peak, but 4.1x faster at peak. That means the result is not merely a static speed hierarchy (i.e., peak demand amplifies the gap).

Poland’s congestion outcomes are also improving overall, with evening peak speeds up 35% year-on-year, largely driven by the T-Mobile and Orange networks and by the recent launch of mid-band 5G.

Ireland, by contrast, shows a shared-ceiling pattern. Three, Vodafone, and Eir diverge widely off-peak, ranging from 99.20 Mbps to 167.00 Mbps. At peak, all three converge within a 13.80 Mbps band, between 34.60 Mbps and 48.40 Mbps. This convergence pattern is unusual among the operator markets analyzed and points to a structural capacity ceiling rather than one operator underperforming in isolation. Ireland’s three-operator market, high per-connection data usage, and low collective capex-to-revenue ratio (atop a rural-skewed geography) appear to create conditions where no operator can easily break away from the market-wide evening constraint.

Portugal, meanwhile, exhibits a deterioration pattern. The country’s evening-to-night performance gap widened from 11% to 34% between Q1 2025 and Q1 2026, the fastest deterioration in our analysis. The primary driver at the operator level is MEO, where peak 10th percentile download speed has fallen to 1.40 Mbps, the lowest figure recorded for any major operator in our European operator sample. This effectively represents a loss of functional service for MEO’s worst-served users during peak hours.

DIGI, which launched as Portugal’s fourth MNO in November 2024, shows a 25% speed drop with near-zero latency inflation of 7%. That result is consistent with the low utilization expected from a new entrant still building its customer base, rather than evidence of superior network engineering at full market scale.

5G Raises the Speed Ceiling but Does Not Prevent It From Being Hit

A persistent assumption in regulatory and industry discourse is that 5G deployment will resolve capacity constraints. Our data offers a more nuanced picture.

Across 10 European markets with significant 5G adoption, we segmented Speedtest® results by device-reported connection type. The average speed drop at peak is 32% for 4G and 27% for 5G. In absolute terms, 5G is substantially faster. A 5G user in Spain still receives 106.40 Mbps at peak versus 20.30 Mbps for a 4G user in the same market.

The proportional pattern, however, varies by market. In France and Norway, 5G peak speeds are actually higher than the 5G off-peak baseline. In Denmark and Switzerland, the proportional 5G speed drop is steeper than the 4G drop. The broad conclusion is therefore not that 5G removes congestion but that it raises the performance ceiling and often softens the evening decline, but it remains exposed to shared capacity constraints.

The more consistent 5G advantage lies in latency under load. In every market tested, 5G loaded latency at peak is lower than 4G, by margins ranging from 12% in Denmark to 44% in the United Kingdom. The U.K. contrast is the starkest. 4G users experience 904 ms loaded latency at peak, while 5G users experience 507 ms. This gap means congested 5G still materially outperforms congested 4G for applications sensitive to delay, including video conferencing, cloud gaming, interactive browsing, and emerging live voice and video AI applications.

This distinction matters for how policymakers and operators frame the 5G value proposition. 5G deployment expands the performance ceiling and delivers a real latency improvement that persists under congestion. But it should not be conflated with congestion resilience. A market can achieve high 5G adoption and still rank among Europe’s most congested. The variables that determine whether peak-hour performance holds, as mentioned earlier, are a combination of capacity investment, densification, spectrum deployment depth, backhaul dimensioning, and traffic management, not the generation label attached to the radio interface.

Seasonal Travel Shifts Europe’s Mobile Congestion Patterns

Analysis of monthly Speedtest® data from January 2024 through March 2026 shows that congestion is not static. It follows seasonal rhythms that differ sharply by geography. This long window allows two summers, two winters, and Q1 2026 to be compared.

Our seasonality analysis uses broad evening and nighttime windows rather than a single hour, reducing sensitivity to daylight-saving changes and one-off hourly effects. The metric here is the ratio of evening download speed to nighttime download speed. Lower values indicate a larger evening gap.

Three seasonal patterns emerge. In several markets, congestion worsens materially in summer. Spain shows the most extreme swing. The evening-to-night speed ratio fell from 60% in January 2024 to the low teens during summer 2024, then remained much weaker in July and August 2025 than in winter.

This aligns with Spain’s position as one of Europe’s most-visited countries. Spain welcomed 96.8 million international tourists in 2025, with a large share of arrivals concentrated in the summer months. These visitors are disproportionately mobile-dependent because they lack residential Wi-Fi offload, and they cluster in geographically constrained coastal zones.

Croatia shows an even more precise seasonal signature. Evening peak speed fell from 58.70 Mbps in January 2024 to 34.90 Mbps in August 2024. The pattern repeated in 2025, with evening speed falling from 71.60 Mbps in June to 35.30 Mbps in August. Croatia recorded 4.7 million tourist arrivals and 27.2 million tourist nights in commercial accommodation in August 2024, a major seasonal load for a country with a resident population of roughly 3.9 million. The concentration of tourism along the Adriatic coast creates acute demand pressure on a relatively narrow cellular footprint.

Nordic markets show a different summer pattern driven less by inbound tourism than by domestic movement toward second homes and rural leisure areas. Norway’s evening peak speed dipped to 77.10 Mbps in July 2024 and 102.40 Mbps in July 2025, compared with 121.40 Mbps and 130.70 Mbps in the respective January periods. Norway has a large stock of holiday homes, many in low-density areas where cellular capacity is designed around lower year-round demand. When urban populations move to these areas during summer, demand shifts toward cell sites that may not be dimensioned for short seasonal peaks. Denmark, Sweden, and Finland display related patterns tied to summer-house traditions.

A final group moves in the opposite direction. In Switzerland, the evening-to-night speed ratio improved from 44% in January 2024 to 76% in August 2024, and from 63% in January 2025 to 85% in August 2025. Austria shows a similar, though less pronounced, pattern.

This points to winter demand concentration as the sharper stress period, likely reflecting a combination of indoor usage, tourism in ski regions, and more difficult terrain for capacity planning.

Investment Intensity Is the Better Indicator of Congestion Resilience

To test which structural factors may shape congestion outcomes, we compared the framework values against market variables drawn from GSMA Intelligence, national statistical authorities, and public data sources.

Our results challenge several common assumptions. National wealth does not explain congestion well. GDP per capita has only a weak negative relationship with measured congestion. For example, Austria, with a GDP per capita of €49,777 (US$58,269; per World Bank data), carries a congestion value of 37, while Romania, at €17,154 (US$20,080), records a lower framework value of 28.

Mobile ARPU tells a similarly mixed story. Higher ARPU appears to support higher absolute peak speeds, but it does not determine whether those speeds hold under peak demand. Switzerland has Europe’s highest mobile ARPU and still ranks third-worst under our congestion framework. ARPU can fund capacity, but it only improves resilience when revenue is actually converted into spectrum deployment, site upgrades, densification, and transport capacity.

Spectrum holdings also require care. Total spectrum per operator shows only a weak relationship with congestion outcomes, and mid-band spectrum per operator shows almost no relationship in this dataset. Spectrum enables capacity, but it does not create capacity on its own. It must be deployed, sectorized, integrated with backhaul, and matched to traffic demand. This is where cell site density likely matters.

The strongest structural relationship we found is capex as a share of revenue. In plain terms, markets where operators reinvest a larger share of revenue tend to hold up better at peak, although the relationship is moderate rather than absolute. Norway, at 24% capex-to-revenue, records a framework value of 8. Switzerland, at 10%, records 47. Both are small, wealthy, three-operator markets with high ARPU. The difference is not simply that one has more money available. It is that one reinvests a larger share of revenue into the network (but also, importantly, has a less intense usage profile).

Market concentration, measured by the Herfindahl-Hirschman Index, shows a weak and counterintuitive negative relationship with congestion. More concentrated markets are not necessarily worse. Italy, the most fragmented mobile market in our sample by this measure, carries a framework value of 41 and the lowest absolute peak speed of any major EU economy at 45.20 Mbps. The Netherlands, among the more concentrated markets with three operators, records 12 and delivers 157.90 Mbps at peak.

Rural population share shows a moderate positive relationship with congestion and the strongest relationship in our dataset with 10th percentile performance. More rural countries systematically deliver weaker outcomes for the most poorly served users at peak (likely contributing to Ireland’s weak standing, for instance), consistent with the challenge of dimensioning capacity across dispersed populations and more extensive coverage footprints.

Peak-Hour Performance Should Become a Regulatory and Competitive Benchmark

The gap between what European mobile networks can deliver under light load and what they provide during the hours of highest demand is material, measurable, and largely invisible to most public benchmarks.

The trajectory of Speedtest® data offers cautious grounds for optimism in some markets. Ireland’s evening peak speed improved from 20.90 Mbps in Q1 2025 to 47.00 Mbps in Q1 2026, a 125% gain (reflecting diversified spectrum deployment post-auction). Poland improved 35% over the same period, reflecting the early impact of mid-band 5G rollout. The U.K. improved 18%, a trend consistent with early network-integration effects following the Vodafone-Three merger, which completed on 31 May 2025.

But these gains coexist with deterioration elsewhere. Portugal’s evening-to-night performance gap widened from 11% to 34% over 12 months, a 23 percentage point increase. Germany’s widened from 20% to 29%, a 9 percentage point increase, even though its evening speed improved slightly. In Germany’s case, nighttime performance improved faster than evening performance, widening the gap that consumers experience between low-load and high-load hours.

Congestion is not an inevitable consequence of demand growth (which itself is slowing in mature markets). Countries with sustained mobile investment intensity, well-managed spectrum deployment, sufficient densification, and enough revenue to fund capacity demonstrate that peak-hour performance can be maintained even as traffic grows or spikes shift.

Methodology

This analysis draws on Speedtest® data from consumer-initiated mobile Speedtest measurements. The primary snapshot covers Q1 2026, January through March, across all 27 EU member states plus Norway, Switzerland, and the United Kingdom. Trend and seasonality analysis extends from January 2024 through March 2026.

Peak hours are defined as 19:00 to 21:00 local time, confirmed as the consistent trough across markets by examining full 24-hour performance profiles. The off-peak baseline is defined as 02:00 to 05:00 local time. The off-peak period is not intended to represent normal consumer usage. It is a low-load reference window used to estimate what the network can deliver when demand pressure is minimal. However, the off-peak baseline should be interpreted as a low-load observed baseline, not necessarily a maximum engineering-capacity baseline, because some networks may apply overnight energy-saving configurations that reduce available radio capacity.

The peak-hour congestion framework combines five components: 30% median download speed drop, 30% loaded latency inflation, 20% queue growth, 10% jitter inflation, and 10% 10th percentile download speed drop. Higher values indicate more severe measured peak-hour degradation.