Tribunal throws out URA’s multi-billion shilling tax assessment, ruling that internet traffic alone is not proof of taxable access
UGX 33,911,117,000. That’s roughly nine million US dollars, and it’s the sum the Uganda Revenue Authority (URA) tried to recover from MTN Uganda for allegedly allowing subscribers to access WhatsApp, Facebook and other Over-the-Top (OTT) platforms without paying Uganda’s now-defunct social media tax.
On 30 June 2026, the Tax Appeals Tribunal delivered a landmark judgment that went far beyond a routine tax dispute. In a majority decision, the Tribunal set aside the entire assessment, finding that URA had failed to prove that the internet activity it detected amounted to taxable access under the law.
The ruling not only handed MTN a major legal victory but also established an important precedent on how governments should enforce digital taxes in an increasingly technology-driven economy.
How the Dispute Began
The dispute traces its roots to Uganda’s controversial Over-the-Top (OTT) tax, popularly known as the social media tax, which was introduced in 2018.
Under the law, internet users were required to pay UGX 200 per day before accessing platforms such as WhatsApp, Facebook, Messenger, Skype and other internet-based communication services.
The tax immediately attracted criticism from civil society, technology experts and economists, who argued that it discouraged internet use and limited access to digital services. Although the government later repealed the tax, outstanding disputes over unpaid liabilities continued.
One of the biggest involved MTN Uganda.
URA alleged that between April 2020 and June 2021, MTN had allowed millions of subscribers to access OTT platforms without paying the daily tax.
Based on its findings, the tax authority assessed the telecommunications company UGX 33.9 billion in unpaid excise duty.
MTN denied the allegations, arguing that the assessment was based on an incorrect understanding of how internet traffic moves through a mobile network.
The Heart of the Case
At the centre of the dispute was one simple but important question:
What does it mean to “access” an online service?
While the Excise Duty Act imposed tax on access to OTT platforms, it did not define exactly when access occurs from a technical standpoint.
URA argued that its monitoring system had detected millions of instances where subscribers connected to WhatsApp, Facebook and similar platforms without paying the tax.
MTN argued that URA had confused an attempt to connect with successful access. That distinction ultimately determined the outcome of the case.
How MTN’s System Worked
To comply with the OTT tax, MTN developed an automated control system that acted like a digital security gate.
Whenever a customer attempted to open WhatsApp or another OTT platform, the system first checked whether the daily tax had been paid.
If payment had been made, the customer was granted access. If payment had not been made, the customer was blocked immediately.
According to MTN, only customers who passed this verification process could actually use the service. URA, however, relied on data collected through its own Data Monitoring System (DMS).
Unlike MTN’s system, URA’s monitoring equipment observed internet traffic before the payment verification process had been completed.
As a result, MTN argued, the system could record internet activity generated by customers who were ultimately denied access.
The 1KB Threshold
One of the Tribunal’s biggest concerns was URA’s use of what became known as the 1-kilobyte (1KB) threshold.
During the audit, URA treated any internet session that transferred more than one kilobyte of data as evidence that a subscriber had accessed an OTT platform.
However, the Tribunal found that this threshold was not contained anywhere in the Excise Duty Act or its supporting regulations.
Instead, it appeared to be an administrative assumption developed during the audit. To challenge URA’s methodology, MTN conducted live demonstrations before the Tribunal.
Its engineers showed that even a customer who had not paid the OTT tax could still generate more than one kilobyte of internet traffic simply by attempting to open WhatsApp.
Although internet data moved across the network, the customer remained blocked and could not use the application.
The demonstration became one of the most significant pieces of evidence in the case.
To explain the issue in simple terms, MTN likened it to someone knocking on the front door of a building. Knocking on the door does not mean the person entered the building.
Similarly, attempting to connect to WhatsApp does not necessarily mean someone successfully accessed the service.
Questions Over the Evidence
As the proceedings continued, MTN challenged several aspects of URA’s assessment.
The company presented payment records showing that at least one subscriber identified by URA as having failed to pay had actually paid the required tax.
MTN also produced correspondence indicating that some internet addresses relied upon by URA to identify Facebook and WhatsApp traffic did not belong to Meta platforms.
In addition, the company questioned the reliability of URA’s data after identifying approximately 158,840 subscriber identifiers that did not match MTN’s standard numbering format.
The Tribunal also questioned URA’s decision to analyse only five days of network data before applying those findings across a 15-month assessment period, noting that no evidence had been presented to show that the sample accurately represented network activity throughout the entire period.
Taken together, these issues raised significant doubts about the reliability of the assessment.
Why the Tribunal Ruled for MTN
In a 2–1 majority decision, the Tax Appeals Tribunal ruled in favour of MTN Uganda.
The judges did not reject URA’s use of digital monitoring technology. Instead, they held that any tax assessment must be supported by evidence proving the event that the law actually taxes.
The Tribunal found that URA had not demonstrated that every instance of internet traffic detected by its monitoring system amounted to successful access to an OTT platform.
The judges further held that the 1KB threshold had no legal basis and could not be used as proof of taxable access.
Once MTN produced technical demonstrations, payment records and other evidence challenging the assessment, the Tribunal found that URA had failed to adequately explain or defend its methodology.
Consequently, the Tribunal set aside the entire UGX 33.9 billion assessment.
The Dissenting Opinion
The decision was not unanimous.
Tribunal member Christine Katwe disagreed with the majority and argued that URA’s assessment should have been upheld.
She maintained that MTN had participated in the installation of the monitoring systems and had not objected to the methodology until the audit produced unfavourable results.
In her view, tax authorities are entitled to develop practical methods of collecting information where legislation does not prescribe a specific process.
Her dissent illustrates the legal and technical complexity surrounding digital taxation.
Why the Judgment Matters
Although Uganda’s social media tax has since been repealed, the Tribunal’s ruling is expected to influence future digital tax disputes.
As governments increasingly rely on technology to improve tax compliance, the judgment reinforces an important legal principle: collecting digital data is not the same as proving tax liability.
The decision makes it clear that tax authorities must ensure their audit methods are supported by law and that technical evidence accurately reflects the taxable event defined by legislation.
The Tribunal also highlighted the importance of reconciling monitoring data with payment records rather than relying solely on automated detection systems.
For businesses, the judgment demonstrates that technical evidence can play a critical role in challenging tax assessments.
For governments, it serves as a reminder that digital taxation requires legal certainty, transparent methodology and reliable evidence.
A Landmark Decision
The MTN-URA case will likely be remembered as one of Uganda’s most significant legal battles over digital taxation.
Beyond the billions of shillings involved, the ruling addresses a broader question confronting governments around the world: how should tax authorities apply traditional tax laws to increasingly sophisticated digital technologies?
For MTN Uganda, the judgment represents a major legal victory and brings an end to one of the country’s largest tax disputes involving the telecommunications sector.
For URA, it underscores the need for tax assessments to be based not only on advanced technology but also on methodologies that are transparent, legally grounded and capable of proving liability with certainty.
As countries continue modernising their tax systems to keep pace with the digital economy, the principles established in this case are likely to shape how similar disputes are investigated and resolved for years to come.
