Annual rent adjustment: how often and by which index?

Has the anniversary of the lease come round? Apply the index in the rent adjustment calculator and check the rest of the lease rules in our guide to Brazilian tenancy law.

Every year, on the lease's anniversary date, the same question arises between landlord and tenant: how much can the rent go up? By the index? Above it? And what if the amount has become badly out of date over time? Rent adjustment seems simple, but it generates a great deal of conflict when the rules are not clear — and when rent adjustment (correction for inflation) is confused with rent review (adjustment to the market).

In this guide, you will understand how often rent can be adjusted, which index applies, the crucial difference between rent adjustment and rent review, and how far the landlord's right to increase the amount goes — all under the Tenancy Act.

How often can rent be adjusted?

The minimum interval for periodic index adjustments is 12 months (Law 10,192/2001, art. 2). Leases commonly provide for annual application on a base date, but the law does not require every lease to increase each year. Check the clause, calculation period and any previous review's effect on the next adjustment date.

This means that monthly adjustments or adjustments over a shorter period than a year are not valid. The landlord cannot, for example, adjust the rent every six months, even if inflation has risen. The adjustment date and the index must be set out in the lease — and it is to this annual milestone that the parties must keep. This rule gives the tenant predictability and protection against frequent increases.

Which index is used to adjust the rent?

The index is whatever is provided in the lease. The most common are:

• IGP-M (General Market Price Index): compiled by FGV and used in leases, it combines different price components and can show substantial volatility.

• IPCA (Broad National Consumer Price Index): compiled by IBGE and used as Brazil's official inflation index, it has a different composition from IGP-M. It is not guaranteed to be lower or more stable every year.

The parties choose the index when contracting or amend it by valid agreement. Differences between IGP-M and IPCA can prompt renegotiation, but do not authorize unilateral substitution. If the lease contains no index, no automatic choice should be assumed. Use the cumulative change over the contractual period, not one month's figure; for a negative index, check the clause and its validity rather than assuming an increase is mandatory.

What is the difference between rent adjustment and rent review?

This distinction is fundamental — and a source of much confusion:

• Rent adjustment: the periodic update using the agreed index, intended to reflect price changes rather than establish market rent. It normally needs no fresh negotiation each year, but application, notice and commencement of charges depend on the clause and law.

• Rent review (rent review action): the adjustment of the amount to the market price, upward (landlord) or downward (tenant). It is only available when there is no agreement and three years of the lease's term or since the last agreement have elapsed (art. 19 of Lei 8.245/1991).

In other words, index adjustment applies a price reference; judicial review compares rent with the market, upward or downward. A new rent can be agreed without waiting three years (art. 18), and routine indexation is not the same as that agreement. Special leases require separate analysis: built-to-suit arrangements under art. 54-A may waive review during their term. Other exceptional grounds are distinct from an ordinary market-rent review. A dedicated blog article covers that action; this page focuses on periodic adjustment.

Can the landlord increase the rent above the index?

Not unilaterally. Under an existing ordinary lease, the landlord cannot impose an increase beyond the agreed index simply because the market rose. The base rent may change by agreement or through a rent review action when its requirements are met, including the three-year period under art. 19. Other exceptional measures require specific grounds, not simply a wish to charge more.

This protects the tenant against impositions: the landlord cannot, in the middle of the lease, simply demand an amount above the index because “the market has gone up.” The tenant is not obliged to accept an adjustment greater than the one provided. If the parties agree on a new amount, fine — the agreement holds. If not, the route is the rent review action, at the right time. Knowing this limit keeps the tenant from accepting undue increases and the landlord from making baseless demands.

A hypothetical example: Mr. Paulo's “doubled” adjustment

Suppose Mr. Paulo, a fictional tenant, has rented an apartment in São Paulo for two years. On the second anniversary, the landlord proposes twice the index-based adjustment, citing increased rents in the neighbourhood. Before accepting, Paulo requests the calculation and checks his lease.

The analysis separates two points: the annual adjustment must follow the agreed IPCA for the correct period, not a unilateral market figure; the additional increase needs agreement or applicable judicial grounds. If the lease is only two years old and no other relevant circumstance applies, the ordinary review's timing requirement has not been met. Paulo may challenge the proposal and request the correct calculation while paying what is due. The dispute does not authorize withholding all rent; any payment into court needs legal assessment. This example does not describe an actual result obtained by the firm.

The most common (and costly) mistakes

• Accepting an adjustment in less than 12 months. The law requires annual frequency — an adjustment before that is invalid.

• Confusing rent adjustment with rent review. Adjustment makes up for inflation; the rent review action adjusts to the market (after three years).

• Accepting an increase above the index without agreement. Outside the rent review action, a real increase depends on consent.

• Not setting the index in the lease. The omission creates uncertainty at the time of adjustment.

• Ignoring the gap after years. An amount badly out of line with the market may call for a rent review action — upward or downward.

Checklist: for a correct rent adjustment

• Check the index and the base date of the adjustment in the lease.

• Apply the adjustment only once a year (a minimum frequency of 12 months).

• Calculate the correction by the agreed index (IGP-M, IPCA or another).

• Remember that an increase above the index depends on agreement (or a rent review action after three years).

• After years, assess whether a rent review action is appropriate (amount badly out of line with the market).

• In case of a dispute, consult a real estate lawyer.

Frequently asked questions about rent adjustment

How often can rent be adjusted?

Periodic index adjustments must respect a minimum interval of 12 months (Law 10,192/2001, art. 2), but the law does not require annual increases. Check the index, base date, calculation period and previous reviews. A newly negotiated rent differs from indexation and cannot disguise adjustments at a prohibited interval.

Which index is used to adjust the rent?

Apply the validly agreed index, such as FGV's IGP-M or IBGE's IPCA, for the contractual period. Neither party may switch indices unilaterally for convenience. Without a clause, there is no automatic choice; negotiate or assess the appropriate legal route. Check official data, cumulative variation and treatment of negative indices.

What is the difference between rent adjustment and rent review (rent review action)?

Index adjustment applies the contractual index; an ordinary rent review brings the amount toward market rent, upward or downward. Without agreement, Tenancy Act art. 19 requires three years from commencement or the last agreement setting rent, not three years of negotiations. Art. 18 allows a new rent to be negotiated earlier. Special leases and other exceptional remedies require separate analysis.

Can the landlord increase the rent above the index?

The landlord cannot unilaterally impose an increase beyond the lease merely because the market rose. A new rent can follow valid agreement or an appropriate judicial review, subject to its conditions. A tenant may contest an improper charge, but the dispute does not authorize withholding all rent; the amount due and payment method must be assessed.

How can a rent adjustment dispute be resolved in São Paulo?

First check the clause, index, period, base date and previous agreements. Request and retain calculations and communications. Depending on the issue, negotiate or assess the appropriate action, including a rent review where its requirements are met. Legal guidance helps establish payments and evidence, but does not guarantee a loss-free outcome.

Do I need a lawyer for rent adjustment matters?

A lawyer is generally not mandatory for an ordinary calculation: apply the clause and official data correctly. Guidance is important where a clause is missing, figures are wrong, increases depart from the lease, previous agreements matter or rent differs from the market. A lawyer checks obligations, calculations and available remedies without guaranteeing a result.

A clear adjustment prevents an annual dispute

A correct adjustment requires a valid clause, the minimum interval and calculation over the agreed period. A negotiated rent and a judicial review are different mechanisms: a new agreed rent should not be confused with indexation, nor should every amendment be described as requiring three years.

Understanding these rules helps both parties plan payments and charges. Record agreements, calculations, the index, the period, treatment of negative changes and communications. This may reduce disagreements, but does not guarantee an absence of disputes or losses.

At Falchet e Marques Sociedade de Advogados, a firm in São Paulo (Av. Paulista), we work in real estate law and leasing — checking adjustments, assessing whether a rent review action is appropriate and advising landlords and tenants in value disputes. If you have doubts about the adjustment of your rent, it is worth checking what the lease and the law guarantee.

Talk to our team on WhatsApp: +55 11 95901-1854 — and resolve your rent adjustment matters with legal certainty.