NF3e and NFCom Mandatory in October: Electronic Invoices That Will Transform Energy and Telecom Billing

Written by Caio Aviz

Published on 18/09/2025 at 17:15

Análise de fatura eletrônica no computador reflete a nova obrigatoriedade das notas fiscais NF3e e NFCom para empresas de energia e telecom.

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Energy And Telecom Will Have To Adapt To The Online Model, At Risk Of Automatic Blocking, Invoice Rejection And Direct Impact On Revenue

Starting in October 2025, electric utilities and telecommunications companies will face a decisive change in their billing processes. The mandatory implementation of NF3e and NFCom marks a structural turnaround in the issuance of tax documents in Brazil.

More than just technological innovation, this transition represents a new model of control and transparency. Therefore, companies that do not prepare themselves face serious risks. Rejected invoices and automatic blocks could lead to penalties, fines, and even damage to reputation.

What Changes In Tax Issuance

Until September 2025, concessionaires and authorized companies used offline systems, based on agreements with the Treasury Departments. Thus, it was possible to bill customers with irregular CNPJs. The customer paid normally, but the operation remained irregular.

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Integration With The Consumption Tax Reform

This change occurs alongside the Consumption Tax Reform, which will officially be implemented on January 5, 2026. In addition, the Technical Note 2025.001 details new mandatory fields.

In practice, the NF3e will include information about state/municipal IBS and federal CBS. The NFCom will have fields for IBS, CBS, and additional rules. This way, the documents will be aligned with the new national tax model.

Therefore, the mandatory requirement in October 2025 is not just a technological update. It integrates the structural transition to the modern tax system, requiring advance preparation.

Federal Revenue Alerts: The Most Common Error In The 2025 Income Tax Could Cost 9 Out Of 10 Brazilians

Official Timeline And Decisive Milestones

July 2025 – States Release Layouts Under Certification.
October 2025 – Start of Optional Production With Strong Recommendation For Use.
January 5, 2026 – Start Of Mandatory Real-Time Validations.

According to the Treasury and Planning Department (SEFAZ), those who do not adapt will face automatic rejections and the risk of severe penalties. Therefore, the preparation time is short and requires immediate action.

Fiscal And Technical Risks

The new rule imposes direct risks:

Automatic Rejection for irregular CNPJs or inactive IE.
Invalid Invoices, characterized as fraud or simulation.
Technical Limitations, such as prohibition of replacements with divergent CNPJs.
Mandatory Credentialing with SEFAZ, already required in states like São Paulo.

Therefore, it is not just bureaucracy. Without adaptation, operations can be halted.

Why Act Immediately

Energy and telecom companies need to act without delay. In addition to updating systems, it will be necessary to train internal teams and create routines for registration verification.

Moreover, credentialing with SEFAZ is essential. Without it, the issuance of the NF3e will be blocked. Thus, those who delay the process run the risk of losing revenue and credibility.

Therefore, anticipating adaptation is the only way to avoid interruptions.

A Watershed Moment In Fiscal Control

The mandatory implementation of NF3e and NFCom in October 2025 marks the beginning of a new era of transparency, control, and tax modernization.

Meanwhile, the Consumption Tax Reform, scheduled for 2026, reinforces this transformation. Therefore, those who prepare now ensure operational continuity and fiscal compliance.

However, companies that postpone adaptation will face mass rejections and severe penalties.

The Future of Fiscal Compliance in Brazil Begins in October 2025. Is Your Company Prepared for This New Scenario?

By: Bruno Jahn, CFO of NFe.io

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18/09/2025 17:18

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NF3e and NFCom Mandatory in October: Electronic Invoices That Will Transform Energy and Telecom Billing

Energy And Telecom Will Have To Adapt To The Online Model, At Risk Of Automatic Blocking, Invoice Rejection And Direct Impact On Revenue

What Changes In Tax Issuance

Integration With The Consumption Tax Reform

Official Timeline And Decisive Milestones

Fiscal And Technical Risks

Why Act Immediately

A Watershed Moment In Fiscal Control

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NF3e and NFCom Mandatory in October: Electronic Invoices That Will Transform Energy and Telecom Billing

Energy And Telecom Will Have To Adapt To The Online Model, At Risk Of Automatic Blocking, Invoice Rejection And Direct Impact On Revenue

What Changes In Tax Issuance

Integration With The Consumption Tax Reform

Official Timeline And Decisive Milestones

Fiscal And Technical Risks

Why Act Immediately

A Watershed Moment In Fiscal Control

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BRICS is preparing a payment system inspired by the Brazilian PIX that will allow direct transactions between countries using national digital currencies without relying on the dollar or Western banks as intermediaries.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

The primate that science has called peaceful for decades has proven to be as aggressive as the chimpanzee in a study with thousands of hours of footage that debunks one of the greatest myths of primatology.

A view from space, an image made by NASA shows the impressive Richat Structure, a geological formation located in the Sahara Desert, also known as the “Eye of the Sahara.”

In the South Atlantic, three isolated volcanic islands cause the wind to draw perfect spirals visible from space: a rare phenomenon called von Kármán vortex streets forms symmetrical patterns behind the peaks of the South Sandwich Islands and was recorded by the NOAA-20 satellite in 2025.

Solar-powered ice factory in the Amazon that eliminated a 5-hour trip to Manaus, prevents the loss of up to two-thirds of the fish, and now ensures income for more than 30 riverside families.

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