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Inquly

Free tool · INE data

Rent update calculator

See how much the rent can rise at the yearly update with the INE's official data: the index agreed in the lease (CPI, IRAV or another percentage), capped by the IRAV.

Latest IRAV published by the INE: 2.54% (September 2026).

The rent you collect now, without passed-on expenses.

The latest figure published on the update date. The INE publishes each month around the middle of the next one.

Whatever the update clause says. If it allows an update without naming an index, the IRAV applies.

Result

Agreed index
4.9%
IRAV cap
2.54%
Applicable change
2.54%
New monthly rent
€871.59
Monthly difference
€21.59

The agreed index exceeds the IRAV, so the increase is capped at the IRAV (article 18 of the LAU).

An estimate. The IRAV cap follows article 18 of the LAU as worded by Royal Decree-law 29/2026, pending validation by Congress. Without an update clause the rent cannot rise, and the new rent is due from the month after written notice.

Inquly keeps each lease with its dates, reminds you of expiries and records the history of rent updates. Free for one property.

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How the rent update is calculated

The new rent is the current rent multiplied by one plus the index change divided by one hundred. What differs from one lease to another is which change applies.

Which index applies

  1. The one in the update clause. Without a clause there is no update: the rent stays the same for the whole lease.
  2. Capped by the IRAV. Under article 18 of the LAU, as worded by Royal Decree-law 29/2026, the yearly increase cannot exceed the change in the IRAV, even when the lease refers to the CPI or another percentage.
  3. If the clause allows an update without naming an index, the IRAV applies.

An example with real data

In September 2026 the INE published an annual CPI change of 4.9% and an IRAV of 2.54%. With a rent of €850 and a lease that refers to the CPI:

Change New rent
What the CPI would give 4.9% €891.65
What the IRAV cap allows 2.54% €871.59

The updated rent would be €871.59: the CPI is above the IRAV, so the IRAV applies.

When and how to notify

  • The update only applies on the lease anniversary, never during the first year.
  • It uses the latest index published on the update date.
  • The new rent is due from the month after written notice, stating the index, its value and the calculation. Our article on CPI and rent updates covers the details.

Where the data comes from

The calculator reads the INE's official series: the IRAV and the annual change in the general CPI. It leaves out the CPI flash estimate the INE publishes at the end of each month, because it is provisional; updates use the final figure.

Keeping track of every lease

In Inquly each lease keeps its start date, its rent and its update history, and you get reminders of expiries. See the contracts page.

Frequently asked questions

How much can I raise the rent this year?

Whatever the lease's update clause says, with one limit: the annual change in the IRAV published by the INE. If the lease refers to the CPI and the CPI is above the IRAV, the increase stops at the IRAV. The calculator shows the latest published figure for both indices.

What is the IRAV?

It is the reference index for the yearly update of housing leases in Spain. Law 12/2023 created it and the INE publishes it monthly, with data from November 2024 onwards. It is steadier than the CPI because it does not fully pass on swings in energy and food prices.

Can I still update the rent with the CPI?

If the lease says so, yes, but capped by the IRAV. Since Royal Decree-law 29/2026 that cap in article 18 of the LAU also applies to leases signed before Law 12/2023. The decree-law is pending validation by Congress, so check the wording in force in the BOE.

Which month's index do I use?

The latest index published on the update date, that is, the lease's anniversary. The INE publishes each month around the middle of the next one, so an update at the start of a month usually takes the figure from two months earlier.

When can I charge the updated rent?

From the month after you notify the tenant in writing, stating the index applied, its value and the new rent. The law also accepts a note on the previous month's receipt. If you notify late, you cannot claim the new rent any earlier.

What if the index is negative?

A negative change lowers the rent by the same proportion, unless the clause says otherwise. The calculator applies the value as it is, positive or negative.

Keep exploring

CPI and rent updates in 2026
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