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Rentals: what are the methods for calculating inflation increases in December 2025 - La Nacion Propiedades
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www.lanacion.com.ar
December 11, 2025
Since the repeal of the rental law, contracts can be adjusted by the index agreed upon by the parties, and the most commonly used is the CPI.
The November inflation data was released this Thursday, so it's now possible to calculate the increase in contracts that adjust from December 12th onwards.Freepik - Image from Freepik
Following the repeal of the rental law —through Javier Milei's Emergency Decree (DNU) in December 2023—the process of updating rental contracts was reopened. One of the most common methods used to adjust them is based on national inflation data .
In this context, and given the unregulated market, some landlords and tenants are agreeing to new two -year contracts in pesos, with inflation adjustments every three or four months . However, some agreements still use the Consumer Price Index (CPI) or are fixed in dollars and do not require adjustments. To update the rent for inflation, the contract can use the CPI, published by the National Institute of Statistics and Censuses (INDEC) every month, as a reference.
When signing the contract, the parties must also define how often the inflation adjustment will be made, that is, the adjustment frequency. “When there is high inflation, like that which marked the end of 2023 and the beginning of 2024, it is advisable for the indexation to be quarterly. In normal times, the indexation could be quarterly or semi-annual,” advises Dr. Enrique Abatti, president of the Argentine Chamber of Property Owners.
Most new rental contracts are agreed for two years with quarterly adjustments for inflation.(Unsplash)
For example, if a quarterly adjustment was agreed upon, for a rent of $650,000 starting on September 11, 2025, which is due to be adjusted in December, the inflation rates of the three previous months are used: September (2.1%), October (2.3%), and November (2.5%). With these figures, the accumulated inflation for the period is around 7.05%, so the rent would become approximately $695,824 per month.
First, it's necessary to know the inflation rate for the period for which the rent adjustment is being considered. The steps to follow would be the following :
Once the data has been located, the steps to create the account are as follows:
The accumulated inflation for the last three months is 7.05%.Hernan Zenteno - La Nacion
In a specific example, if a rental agreement for $650,000 with quarterly inflation adjustment was signed on November 11, it should be updated for the first time in December .
The monthly variation in inflation during those months was:
After dividing each percentage by one hundred and adding one, the calculation would look like this:
650,000 x 1,021 x 1,023 x 1,025 = $695,886
That will be the new rental value for the following quarter.
The result does not always match the calculation performed through the automatic calculator ( chequeado.com ), since the figures published monthly by Indec are rounded (the number may contain a greater number of decimal places which, when considered in the calculation, can vary between 100 and 300 pesos more than the final result).
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Source:
Alquileres: cuáles son los métodos para calcular los aumentos por inflación en diciembre 2025
A partir la derogación de la ley de alquileres, los contratos pueden ajustarse por el índice que se decida entre las partes y el más utilizado es el del IPC
www.lanacion.com.ar
December 11, 2025
Since the repeal of the rental law, contracts can be adjusted by the index agreed upon by the parties, and the most commonly used is the CPI.
The November inflation data was released this Thursday, so it's now possible to calculate the increase in contracts that adjust from December 12th onwards.Freepik - Image from Freepik
Following the repeal of the rental law —through Javier Milei's Emergency Decree (DNU) in December 2023—the process of updating rental contracts was reopened. One of the most common methods used to adjust them is based on national inflation data .
In this context, and given the unregulated market, some landlords and tenants are agreeing to new two -year contracts in pesos, with inflation adjustments every three or four months . However, some agreements still use the Consumer Price Index (CPI) or are fixed in dollars and do not require adjustments. To update the rent for inflation, the contract can use the CPI, published by the National Institute of Statistics and Censuses (INDEC) every month, as a reference.
When signing the contract, the parties must also define how often the inflation adjustment will be made, that is, the adjustment frequency. “When there is high inflation, like that which marked the end of 2023 and the beginning of 2024, it is advisable for the indexation to be quarterly. In normal times, the indexation could be quarterly or semi-annual,” advises Dr. Enrique Abatti, president of the Argentine Chamber of Property Owners.
Most new rental contracts are agreed for two years with quarterly adjustments for inflation.(Unsplash)
How to calculate the inflation increase
With an automatic calculator
There are many online automatic calculators for accumulated inflation that use data published by INDEC (the National Institute of Statistics and Censuses). One of them is Chequeado, which will be used as a reference in the following procedure:- Go to https://chequeado.com/inflacionacumulada/
- Where it says “To buy something that was going out” enter the rental amount that needs to be updated.
- Where it says “at the beginning of”, enter the month in which the period from which you want to make the adjustment begins. For example, if you wanted to make a quarterly update in mid-December, you should consider the period from September to November (since the latter has already been disclosed).
- Where it says "at the end of", enter the month in which the period from which you want to adjust ends.
- Where it says "you would need the sum of" the new rental value will appear.
For example, if a quarterly adjustment was agreed upon, for a rent of $650,000 starting on September 11, 2025, which is due to be adjusted in December, the inflation rates of the three previous months are used: September (2.1%), October (2.3%), and November (2.5%). With these figures, the accumulated inflation for the period is around 7.05%, so the rent would become approximately $695,824 per month.
Manually
If you decide to adjust manually, it is important to note that you should not add up the inflation of each month, but rather multiply the inflation variations of each month and multiply by the rental value , since this is the accumulated inflation of the period.First, it's necessary to know the inflation rate for the period for which the rent adjustment is being considered. The steps to follow would be the following :
- To access the Indec CPI report, visit the Indec website ( indec.gob.ar ), go to the "Statistics" tab, click on "Prices" within the Economy section, and then select the "Consumer Prices (CPI)" button. You can also access it directly from this link .
- Click on the “read report” button.
- On the fourth page of the document, see the second graph, “Monthly Variations of the General Level of the CPI.” There you can see the inflation for each month, which will be used to calculate the rate of change over the desired period.
Once the data has been located, the steps to create the account are as follows:
- First, you have to calculate the inflation value for each month separately, divide it by 100, and add 1. For example, if the inflation for September was 2.1%, dividing it by 100 gives 0.021; plus 1, it becomes 1.021. The same should be done with the values for October and November.
- Then you need to multiply the current rent by those individual inflation rates. The result will be the new rent to be paid during the next quarter.
- In other words, the formula would be: rental value x (inflation first month/100 + 1) x (inflation second month/100 + 1) x (inflation third month/100 + 1) = updated rental value.
The accumulated inflation for the last three months is 7.05%.Hernan Zenteno - La Nacion
In a specific example, if a rental agreement for $650,000 with quarterly inflation adjustment was signed on November 11, it should be updated for the first time in December .
The monthly variation in inflation during those months was:
- September: 2.1%
- October: 2.3%
- November: 2.5%
After dividing each percentage by one hundred and adding one, the calculation would look like this:
650,000 x 1,021 x 1,023 x 1,025 = $695,886
That will be the new rental value for the following quarter.
The result does not always match the calculation performed through the automatic calculator ( chequeado.com ), since the figures published monthly by Indec are rounded (the number may contain a greater number of decimal places which, when considered in the calculation, can vary between 100 and 300 pesos more than the final result).
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