Where the Figure Comes From

Each year, Portugal’s National Statistics Institute (INE) sets the rent adjustment coefficient (coeficiente de atualização das rendas). It is based on how consumer prices have moved over the previous 12 months, excluding housing. The aim is to let rents keep pace with the cost of living, without the property market itself feeding into the calculation.

As a result, the figure tends to be steadier than headline inflation. Annual inflation reached 3.3% in August. The coefficient settled at 2.56% because it reflects a full year’s average and leaves housing out.

For 2027, the coefficient is 1.0256. A monthly rent of €1,000 may rise to €1,025.60, and one of €2,500 to €2,564.

This is a ceiling, not an obligation. A landlord may apply a smaller increase, or choose not to update the rent at all. That choice is often a balance between the property’s return and the value of keeping a reliable tenant.

When and How It Can Be Applied

The coefficient is a fallback rule. If the lease has its own update clause, such as a fixed increase or a link to a different index, that clause applies.

Without such a clause, the rent may be updated once a year, from the first anniversary of the lease or of the last update. The increase is not automatic. The landlord must notify the tenant in writing at least 30 days in advance, stating the coefficient and the new rent.

Updates skipped in previous years can generally be recovered within a limited period, which calls for a case-by-case review.

For landlords, timing matters most, particularly for those with several properties or living outside Portugal. Each lease has its own anniversary date, and a late or incomplete notice can delay the update.

For tenants, it is worth checking that the increase stays within the limit and the one-year interval, and whether the lease sets a different rule.

A rent update is, in principle, a simple step. Timed well and clearly communicated, it protects the property’s return without straining a relationship that often lasts for years.

How VCA Can Help

We advise owners, families and investors with let property in Portugal, including those who manage their assets from abroad. We review leases and prepare notices to tenants. For tenants, we check whether a proposed update is correct. Where the question goes beyond the lease, such as the tax treatment of rental income or wider family estate planning, our Leasing team works alongside our Tax and Private Wealth departments.

Lease Agreements Team

Ana Santos Fontes | Inês Alvoeiro