Every year there are taxpayers who receive more money from the IRS than they expected. It’s not a mistake or luck. It is a little talked about tax mechanism, applied automatically, which depends on the municipality where each person has their tax residence.
According to , a website specializing in economics, the so-called municipal discount on Income Tax allows city halls to return up to 5% of the tax to their residents. This is an annual policy option, taken by each municipality, which can translate into significant savings for families.
The benefit has existed since 2008 and remains in force for income declared in 2026. In total, more than two hundred municipalities chose to give up part of the revenue to which they would be entitled, with a few dozen returning the entire amount.
An automatic and barely visible mechanism
In practice, the municipal discount is applied when calculating Income Tax. It does not require any request from the taxpayer nor does it imply changes in filling out the declaration. The value appears directly reflected in the final calculation, whether through a larger refund or a smaller amount payable.
The operation is simple. By law, municipalities can retain up to 5% of the IRS generated in their territory. However, they may give up part or all of that percentage. The difference goes to taxpayers.
If a city council decides to retain just 3%, the remaining 2% is returned. If you choose not to withhold any installments, the taxpayer benefits from a maximum refund of 5%. When retention is total, there is no discount.
The impact on your pocket
The final value always depends on two factors: the rate defined by the municipality and the amount of net IRS collection, that is, the tax calculated after deductions.
In a practical case, a taxpayer with a payment of R$8,000 can obtain a discount of R$200 in a municipality with a 2.5% refund. If you live in a municipality that returns the 5%, the value increases to R$400.
The difference between municipalities can therefore translate into hundreds of euros per year. In proportional terms, the higher the tax due, the greater the benefit.
Lisbon leads, others are behind
Between the capitals, there are significant differences. Lisbon stands out for returning the full 5%, while Porto sets the return at 2.5%. Other cities have lower percentages and there are even cases where there is no refund.
In total, 44 municipalities chose to fully refund the tax, covering several regions of the country, including inland territories and some tourist areas.
Essential condition: meet the deadline
Although automatic, access to the discount is not guaranteed in all situations. There is an essential rule: submitting the Income Tax declaration within the legal deadline.
Anyone who misses the period between April and June loses the right to the benefit, regardless of the municipality where they live. This is a strict condition, with no exceptions.
Confirmation of the discount can be made in the settlement note, available on the Finance Portal, where it is identified as a municipal benefit.
In a context where every dollar counts, this mechanism can make a difference in disposable income. According to the same source, many taxpayers continue to be unaware of its existence, despite it being one of the few fully automatic tax benefits in the Portuguese system.
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