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Rent Increase Calculator 2026

Rent increase coefficient - Portugal

Calculate the new rent with the annual legal coefficient published by INE in Diário da República. For 2026, the coefficient is 1.0224: a maximum 2.24% rise where the lease follows this regime. Includes the monthly increase, yearly impact and minimum 30-day notice.

By Elijah·UPDATED JULY 2026·4 MIN·OFFICIAL SOURCES
KEY FACTS
2026 coefficient
1.0224 (+2.24%)
Formula
New rent = current rent × coefficient
Tenant notice
In writing, at least 30 days
2027
Not published as of 21/07/2026
€
▾
2027 não aparece porque ainda não havia coeficiente oficial publicado em 21 de julho de 2026.
dia
A estimativa assume que a nova renda entra na primeira data de pagamento depois dos 30 dias de aviso.
NOVA RENDA MENSAL
—
—
Coeficiente aplicado—
Aumento mensal—
Impacto em 12 rendas—
Primeira renda atualizada—
CONFIRME ANTES DE ENVIAR
A comunicação deve indicar o coeficiente e a nova renda dele resultante. Se o contrato tiver uma cláusula escrita de atualização, essa cláusula pode afastar o coeficiente legal supletivo.

How this works

The annual rent update is simple arithmetically and sensitive in practice. Where the lease does not set another regime, the annual coefficient published by INE in Diário da República applies. For 2026, Notice 23174/2025/2 sets the coefficient at 1.0224. This tool multiplies the current rent by the chosen coefficient, shows the new rent and, if you enter the notice date, helps identify the first rent payment that can be updated after the minimum 30-day notice.

  1. 1
    Choose the published year
    INE calculates the annual coefficient and the notice is published in Diário da República by 30 October. This tool uses the official coefficients already published for 2024, 2025 and 2026. The 2027 coefficient had not been published as of 21 July 2026.
  2. 2
    Multiply the current rent
    The calculation is direct: current rent × coefficient. For 2026, a €900 rent becomes €920.16, because 900 × 1.0224 = 920.16.
  3. 3
    See the monthly and yearly increase
    We show the monthly difference and the yearly impact over 12 rents. The amount is rounded to cents, like a real rent payment.
  4. 4
    Estimate the first possible rent date
    If you enter the notice date and the usual payment day, we estimate the first rent payment that can reflect the update, respecting the minimum 30-day notice in article 1077 of the Civil Code.

Frequently asked

What is the maximum rent increase in 2026?
For contracts that follow the annual legal coefficient, the 2026 coefficient is 1.0224, meaning a 2.24% increase. The contract may contain a different written clause; if it does, read that before applying this calculation.
Does the rent rise automatically?
Do not assume so. If the contract has no different regime, the landlord may update the rent annually, but must notify the tenant in writing of the coefficient applied and the new rent at least 30 days in advance.
When can the first update be made?
The first update can only be required one year after the lease starts. Later updates can be required successively one year after the previous update.
What if the landlord missed previous years?
Article 1077 says missed coefficients may be applied in later years as long as no more than three years have passed since the date they could first have been used. That may require a cumulative calculation and a contract review; this tool calculates one coefficient at a time.
Is the 2027 coefficient available?
Not as of 21 July 2026. Under article 24 of the NRAU, the notice with the coefficient must be published in Diário da República by 30 October each year. Until then, we do not invent a 2027 value.
Does this apply to every lease?
Not necessarily. Old leases, social rent, controlled rent, municipal regimes or specific contract clauses may follow different rules. This calculator covers the common annual update when the published legal coefficient applies.
OFFICIAL SOURCES
DISCLAIMER
Informational tool based on the official coefficients published for 2024, 2025 and 2026 and the general NRAU/Civil Code rules. It does not read your lease and is not legal advice. Contracts with their own clause, old regimes, social/controlled rent or municipal rules may work differently. The 2027 coefficient had not been published as of 21 July 2026.