WHERE AUSTRIAN ECONOMICS MEETS REAL WORLD ACTION

Portugal taxes rents at or below €2,300 a month at 10% and the rest at 25%. The line now sets rents, steers capital downmarket and treats equal incomes unequally.

You own a renovated three-bedroom flat in Lisbon. Your tenant is leaving, and the agent says the next one will pay €2,450 a month.

Then your accountant runs the numbers. Let it for €2,300 and you keep €24,840 a year after tax. Let it for €2,450 and you keep €22,050.

So you ask less, for a better flat, from a tenant who would happily have paid more. Nobody told you to. The tax did.

Decree-Law 97/2026, published on 20 May, cut the tax on rental income from homes let as a residence. In the government’s words, it is “the reduction of income tax from 25% to 10% on moderate rents”. The 25% is the flat rate Portugal charges on rental income taxed on its own; an owner can instead choose to add rental income to his other income and pay the ordinary income-tax scale. The figures in this issue are for an owner on the flat rate. The cut applies from 1 January 2026 to income earned until 31 December 2029, and it covers leases “already in progress”, not just new ones.

There is a condition. The monthly rent must not exceed 2.5 times the 2026 minimum monthly wage of €920. That is €2,300. Above it, the whole lease stays at the flat 25%. For company landlords, and self-employed landlords who keep formal accounts, the relief works differently: only half of the qualifying income counts. The line is fixed at the 2026 wage. Ministers “may” update it by order, but nothing requires them to.

The same decree adds a third tier. From 1 September 2026, a new “simplified affordable rental regime” exempts rental income from income tax altogether, for qualifying leases (a permanent home needs at least a three-year term) at rents below a cap based on 80% of the local median rent per square metre. It replaces the 2019 affordable-rent programme. The decree also cuts VAT on building and renovating homes from 23% to 6%. The 2027 budget, now before Parliament, books a further €209 million of lost revenue from the rent cut in 2027. Its first vote is on 28 October and its final vote on 24 November.

The government’s case deserves to be stated properly. It calls housing a priority, given high costs of building and buying and “the lack of supply at controlled costs”. It says the moderate line is meant to be “wide enough to cover all the housing supply for middle-class families”. It wants “an effective stimulus to housing supply in the rental and purchase markets”. And the strongest point is true: this is a real tax cut. It caps no rent by law, and leaves more of every qualifying rent with the owner.

Take every word of that as true. What follows is unaffected.

The state is fixing its own costs

Read the package as a list. VAT on building homes was 23%, and now it is 6%. The tax on rent was 25%, and now, for some, it is 10%, and for others nothing. The 2019 affordable-rent programme is repealed, and the decree says why: the new regime is meant to overcome “the constraints arising from the complexity” of the old one. The government is cutting its own taxes and redoing its own rules to make homes cheaper to build and let. That concedes those taxes and rules were part of the cost. The package says it, in the government’s own numbers.

Ludwig von Mises argued in Critique of Interventionism (1929) that each intervention produces results its own supporters don’t want, and the state must then either withdraw it or add another. Here the state withdraws part of its tax, but only for some, and draws two new lines to decide who. Qualifying leases below a local median-based cap: no tax. Rent up to €2,300: 10%. Rent above it: 25%. Each line has effects of its own.

A tax line is a soft price cap

The decree caps no rent. It doesn’t have to.

What an owner on the flat rate keeps

One extra euro of rent costs the owner about €4,100 a year. Anywhere between €2,300 and €2,760 a month, the owner keeps less than at €2,300. Owners in that band have every reason to offer at the line instead, or not to offer at all.

That rent was doing a job. Friedrich Hayek described prices in 1945 as “a mechanism for communicating information”. A rent of €2,450 tells builders what a better flat is worth and where homes are scarcest. Pull every rent near the line down to €2,300 and that information is lost.

Supply leans downmarket

A home let at or below the line now earns its owner more, after tax, than the same money invested in a home let above it. So capital, renovation and conversion lean towards the cheaper segment. A large flat may be split in two, or priced down to the line. Fewer large family homes and executive lets reach the market.

For an owner on the flat rate, those homes pay no more than before: the same 25%. But everyone below the line got a cut and they didn’t. Fewer of them come to market, so their rents rise relative to the rest. The investor who risked capital on a larger home is penalised for the size of the home, not for anything he did. We can’t put a number on the effect. Its direction is clear.

Same income, different tax

Take two owners on the flat rate. One lets a flat at €2,300 a month and pays €2,760 a year in tax. The other lets a flat at €2,301 and pays €6,903. Their rent differs by €12 a year. Their tax differs by more than €4,000, because of where the state drew a line.

Mises put it bluntly in Human Action (1949): “The essence of the interventionist policy is to take from one group to give to another.” He was writing about redistribution in general. Here the transfer is quieter: relief for owners below the line, paid for by the budget, while owners above it carry the old rate. Much of the relief also goes to leases already running, which rewards homes that existed and adds none.

Two people, one lease, neither choosing freely

A lease is two people’s judgement of what a home is worth. The owner weighs the rent against selling, renovating or leaving it empty. The tenant weighs it against every other home she could live in. Each ranks the options by their own lights, and the rent is where those rankings meet.

The tax line steps between them. The owner now prices to the line, not to the tenant. The tenant who would gladly pay €2,450 for the better flat may never be offered it. The flat is offered at €2,300, or held back, or split. Neither of them chose that outcome. A rule did.

A line that moves only when ministers choose

The line is 2.5 times the 2026 minimum wage, fixed in euros until a ministerial order says otherwise. If rents rise and nobody updates the line, more existing leases cross it each year and lose the relief. The whole regime ends after 2029. A builder who starts today gets a rate that ends in 2029, whenever the homes are finished, on a line that moves only at ministers’ discretion. You can price a rule. You can’t price a discretion.

The concession stands: it is a real tax cut. The objection is that it is a cut for some, at a price set by a line.

This is analysis, not legal, tax or investment advice. Check your own position with an adviser.

Tax all rental income at one rate, whatever rent owner and tenant agree. No line, no band, no separate exempt tier below a local cap, and no ministerial order deciding who qualifies.

If the state can afford 10% for some owners, the direction is a lower rate for all of them. The test of intent is in the decree: a measure aimed at new supply would not cover leases already running, or freeze its line in 2026 euros. Then the rent would go back to doing its job: telling owners what a home is worth to the people who want it, and telling builders where homes are scarcest, at every size and every price.

It passes the equal-treatment test. There is no subsidy, grant or tax break for anyone, and no carve-out by rent, size, owner or contract date. The current rule fails it: two owners with the same income pay different rates because of where a line falls.

Stay free,

Jean-Pierre

The Austrian Actor

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