The DECO PROteste has launched a net salary calculator to assist individuals in calculating their earnings under the new IRS withholding changes. The consumer protection organization warns that IRS refunds may be lower in 2026.
“To help taxpayers with recent tax changes, DECO PROteste introduces a new net salary calculator in response to the modifications effective from October. The tool, available on the IRS Simples portal, allows any employee or pensioner to easily and quickly calculate the net amount they will receive with the new IRS withholding tables, effective from October 1,” states a press release accessed by Notícias ao Minuto.
These new tables, in effect until the end of 2025, replace the exceptional special regime tables applied in August and September, according to DECO PROteste.

The implementation of the new IRS tables effectively provides more monthly income to workers. This relief was more noticeable in August and September due to retroactive payments.
Attention to Refunds in 2026
“Although the new tables result in increased monthly income available to most Portuguese, DECO PROteste warns about the impact this change will have in settling accounts with the Tax Authority in 2026,” it notes.
The expectation of lower refunds in 2026 stems from “retaining less tax each month, meaning the accumulated amount for final settlement will be lower.”
“Consequently, taxpayers accustomed to receiving refunds may see a significant decrease in these amounts or even face the need to pay additional tax. This negative impact was felt in 2025, with many families having to resort to installment plans to pay the IRS, and everything indicates it will repeat in 2026,” the organization emphasizes.
Attention to Family Budgeting
In light of this scenario, DECO PROteste “emphasizes the importance of careful tax planning” and suggests that “it’s crucial for taxpayers to maintain the habit of requesting invoices with a tax identification number (NIF) for all expenses and regularly validating them on the E-Invoice portal.”
“This behavior is essential to ensure all possible deductions are considered, helping to reduce the tax payable next year,” the note adds.
The organization also mentions that “for continuous monitoring, to be alerted about new dates for fulfilling tax obligations, and to gain access to more advice, taxpayers can consult the IRS Simples platform.”

Check out the topics that marked this week, from September 22 to 26, ranging from the new IRS tables providing a ‘bonus’ in salaries this month to fuel price predictions.