The tax reform created a specific regime for transactions involving real property under IBS and CBS, governed by arts. 251 to 271 of Complementary Law 214/2025. Instead of the full rate, real-estate transactions have the rate reduced by 50% (sale, development, construction) and by 70% (lease, assignment and leasing). To avoid taxing what the property was already worth, there is the adjustment reducing factor; and to protect housing, there is the social reducing factor — R$ 100,000 per new residential property sold and R$ 600 per month on residential rent. Small individual owners, below certain thresholds, fall outside the regime.
Below, the TaxUp team, tax consultancy for the real-estate sector, details who enters the regime, the rates, the reducing factors, real-estate development and the timeline — with the exact legal basis and what changes for developers, builders, real-estate agencies and landlords.
- A regime of its own: transactions involving real property follow arts. 251-271 of LC 214/2025, outside the general logic of goods and services.
- Reduced rate (art. 261): −50% on sale, development and construction; −70% on lease, assignment and leasing.
- Adjustment reducing factor (arts. 257-258): each property carries its value as of 12/31/2026 (adjusted by the IPCA), deducted on sale — IBS/CBS only reach the post-reform appreciation.
- Social reducing factor (arts. 259-260): R$ 100,000 per new residential property and R$ 30,000 per lot on sale; R$ 600/month on residential rent.
- Small owner (art. 251): an individual below the thresholds is not a taxpayer. And the municipal ITBI remains — it was not replaced.
What changes in real estate: the overview
The real-estate sector got a regime of its own because its transactions do not fit the general logic of goods and services. Buying, building, developing, subdividing and renting now have specific rules of IBS and CBS. The design combines four pieces:
| Piece | What it does | Legal basis (LC 214/2025) |
|---|---|---|
| Reduced rate | −50% on sale, development and construction; −70% on lease, assignment and leasing | Art. 261 |
| Adjustment reducing factor | Deducts from the base the value the property already had, to tax only what is added | Arts. 257 and 258 |
| Social reducing factor | Deducts R$ 100,000 per new residential property (and R$ 30,000 per lot) on sale; R$ 600/month on residential rent | Arts. 259 and 260 |
| Small-owner filter | An individual below certain thresholds is not a taxpayer | Art. 251 |
For most transactions the effect is a lower burden than the full rate, but the calculation is no longer trivial: the base passes through two reducing factors before applying the already-reduced rate.
Before the reform: ISS, RET and the real-estate patchwork
Taxing real estate was always fragmented. Construction and development paid ISS to the municipality, with the historic dispute over whether to deduct the value of materials from the base — a discussion that reached the Supreme Court in Theme 247 (RE 603,497), where the validity of the deduction provided for in Decree-Law 406/1968 was recognised. Development with an affected-assets structure had the RET, a unified federal special regime under Law 10,931/2004. Added to these were PIS and Cofins on real-estate revenue and, on transfer, the municipal ITBI.
The reform reorganises the consumption part: ISS and PIS/Cofins on real-estate transactions give way to IBS and CBS, within the specific regime, with reduced rates and reducing factors. The ITBI, being a tax on transfer (and not on consumption), remains and stays outside IBS and CBS. Instead of several overlapping bases and regimes, there is now a single regime — even if full of moving parts.
Legal basis
The real-estate regime is a specific regime authorised by the Constitution (art. 156-A, § 6, as worded by Constitutional Amendment 132/2023) and detailed in LC 214/2025:
| Topic | Legal basis |
|---|---|
| Specific regime for real property | Arts. 251 to 271 of LC 214/2025 |
| Taxpayer and individual thresholds | Art. 251 |
| Adjustment reducing factor | Arts. 256, 257 and 258 |
| Social reducing factor | Arts. 259 and 260 |
| Reduced rates | Art. 261 |
| Real-estate development and land subdivision | Art. 262 et seq. |
Who enters the regime (and the small owner)
The regime reaches those who assess IBS and CBS under the regular regime and carry out transactions involving real property — developers, builders, land-subdividers, real-estate agencies and habitual landlords. The sensitive point is the individual: they only become a taxpayer (and enter the regime) when they exceed the thresholds of art. 251.
| Transaction | The individual is a taxpayer when, in the prior year… |
|---|---|
| Lease, onerous assignment or leasing | total revenue exceeds R$ 240,000 and the properties number more than 3 (both conditions together) |
| Disposal or assignment of rights | the transactions cover more than 3 distinct properties |
| Sale of a self-built property | disposes of more than 1 self-built property within the previous 5 years |
Within the same year, the individual also becomes a taxpayer if disposals exceed those thresholds or if lease revenue exceeds the R$ 240,000 cap by 20% (art. 251, § 2). In short: those with few properties and low rental income stay outside; above a certain volume, the activity is treated as economic and enters IBS and CBS.
Rates: −50% on sale, −70% on rent
Art. 261 sets two reductions on the standard IBS and CBS rate:
| Transaction | Reduction | Legal basis |
|---|---|---|
| Sale, development, construction, subdivision and other transactions in the regime | −50% | Art. 261, caput |
| Lease, onerous assignment and leasing | −70% | Art. 261, sole paragraph |
The reduction applies to the rate; the effective burden depends on the reference rate in force. But the strategic read is already clear: rent is the most relieved real-estate consumption in the regime, with a 70% reduction, while sale and construction sit at half the rate.
The reducing factors: adjustment and social
Here is the engineering that sets the regime apart — and that most analyses treat only superficially. Before applying the reduced rate, the tax base passes through two reducing factors.
The adjustment reducing factor avoids taxing what the property was already worth. From January 1, 2027, each property of a regular-regime taxpayer receives an adjustment-reducing-factor value, used exclusively to reduce the base at the time of sale (art. 257). That initial value corresponds, as a rule, to the property’s acquisition value (or, by election, the reference value) as of December 31, 2026, adjusted by the IPCA (art. 258). In practice, IBS and CBS fall on the appreciation occurring from the reform onward, not on the value the property already had before it.
The social reducing factor protects housing. It deducts from the base, in residential transactions, fixed amounts:
| Residential transaction | Social reducing factor | Legal basis |
|---|---|---|
| Sale of a new residential property | R$ 100,000 per property | Art. 259 |
| Sale of a residential lot | R$ 30,000 per lot | Art. 259 |
| Residential lease, assignment or leasing | R$ 600 per month, per property | Art. 260 |
The social-reducing-factor amounts are adjusted monthly by the IPCA and, on sale, each property may use it only once (art. 259, §§ 2 and 3). Combined, the adjustment reducing factor and the social reducing factor reduce the base even before the already-reduced rate comes into play — which is why, in real estate, computing the tax requires following the right order: base, less the adjustment reducing factor, less the social reducing factor, times the reduced rate. It is a point that connects the regime to the reform’s non-cumulativity.
Real-estate development and land subdivision
In real-estate development and land subdivision, IBS and CBS on the disposal of units are due on each payment (art. 262) — tracking the flow of receipts, rather than all at signing. The law defines what a real-estate unit is (the land for sale, each lot of the subdivision, each unit resulting from the development), which matters for knowing what the tax falls on in each project. For the developer, this changes the assessment: the tax follows the financial schedule of the sales, with the base already cleaned up by the reducing factors.
Timeline
The real-estate regime tracks the reform’s general transition, with a milestone of its own: the adjustment reducing factor is set based on the property’s situation as of December 31, 2026.
| Year | What happens |
|---|---|
| 2026 | Test year; on 12/31/2026 the value of properties is photographed for the adjustment reducing factor |
| 2027 | Full CBS; the regime takes effect for the CBS and the adjustment reducing factor per property |
| 2029–2032 | Transition of the IBS, with ISS phasing down year by year |
| 2033 | Full regime: IBS and CBS fully in force |
The date of 12/31/2026 is strategic: it is the reference for the value each property carries as its adjustment reducing factor. That is why organising the property and document records of real estate before the end of 2026 is a matter of transition planning, not routine.
What changes in practice
Developers and builders. They leave ISS and PIS/Cofins and enter the regime with the rate reduced by 50%, the base cleaned up by the adjustment reducing factor and, for new residential, by the social reducing factor of R$ 100,000 per unit. Assessment in development follows the payment (art. 262). The critical point is the photograph of 12/31/2026 — the acquisition value of land and inventory sets the adjustment reducing factor of each property.
Landlords and real-estate agencies. Residential rent sits among the most relieved forms of consumption: −70% on the rate and R$ 600 per month of social reducing factor per property. But the individual with relevant volume (more than 3 properties and more than R$ 240,000/year) becomes a taxpayer (art. 251) — which requires classifying habitual landlords and reviewing contracts. Real-estate holding structures enter this calculation.
Buyers and investors. The adjustment reducing factor makes IBS and CBS fall on the post-reform appreciation, not on the historical value — which changes the math for those who buy to resell. The decision of when to sell, and how to document the acquisition value, now has a direct tax effect.
In the TaxUp team’s assessment, real estate comes out of the reform with a lower burden on average, but with a layered calculation (two reducing factors before the rate) and an unpostponable milestone: organising the values and documentation of properties by December 31, 2026. It is a regime of its own nature, like that of healthcare.
Common mistakes and risks
- Thinking “−50%” is the rate. It is a 50% reduction on the standard rate; the effective burden depends on the reference rate (art. 261).
- Forgetting the order of the calculation. First you remove the adjustment reducing factor, then the social reducing factor, and only then apply the reduced rate. Reversing the order gets the base wrong.
- Ignoring the date of 12/31/2026. It is the reference for each property’s adjustment reducing factor; without a well-documented acquisition value, the deduction is lost.
- Assuming every individual landlord is exempt. Above 3 properties and R$ 240,000/year of rent, the individual becomes a taxpayer (art. 251).
- Confusing the ITBI with IBS/CBS. The ITBI still exists, is municipal and falls on transfer; it was not replaced by the reform.
- Applying the social reducing factor outside residential. It applies to new residential property, residential lots and residential rent — not to commercial (arts. 259 and 260).
Organise your properties before 12/31/2026
The photograph of property values at the end of 2026 sets the adjustment reducing factor — and the IBS/CBS burden on sale. The TaxUp team structures the classification of developers, real-estate agencies and holdings before the milestone.
Frequently asked questions
How are property taxes treated under the reform?
Transactions involving real property enter a specific IBS and CBS regime (arts. 251 to 271 of LC 214/2025), with the rate reduced by 50% on sale, development and construction and by 70% on lease, plus an adjustment reducing factor and a social reducing factor that lower the base. The municipal ITBI remains separate.
Will I pay IBS and CBS when selling my property?
It depends on whether you are a taxpayer. An individual only enters the regime above the thresholds of art. 251 (for example, selling more than 3 properties in the year). Those who sell their own property, occasionally, are as a rule not taxpayers.
What is the adjustment reducing factor?
It is a value tied to each property (as a rule, the acquisition value as of 12/31/2026, adjusted by the IPCA) that is deducted from the base on sale (arts. 257 and 258). With it, IBS and CBS fall only on the appreciation occurring from the reform onward, not on the value the property already had.
What is the social reducing factor?
It is a fixed deduction from the base in residential transactions: R$ 100,000 per new residential property and R$ 30,000 per lot on sale (art. 259), and R$ 600 per month per property on residential rent (art. 260). The amounts are adjusted by the IPCA.
Will those who rent out a property pay IBS and CBS?
Rent is within the regime with a 70% reduction on the rate and a social reducing factor of R$ 600/month for residential. But an individual is only a taxpayer if, in the prior year, they had more than 3 properties and lease revenue above R$ 240,000 (art. 251). Below that, they stay outside.
How does the taxation of development work?
In development and land subdivision, IBS and CBS on the sale of units are due on each payment (art. 262), with the base reduced by the reducing factors and the rate reduced by 50%.
Did the ITBI end with the reform?
No. The ITBI is a municipal tax on the transfer of real property and was not replaced by IBS and CBS. It continues to fall on purchase and sale, in parallel with the new regime.
When do the rules start to apply?
During the reform’s transition: full CBS in 2027 and IBS between 2029 and 2033. The situation of properties as of 12/31/2026 sets the adjustment reducing factor.
Sources: Complementary Law 214/2025, arts. 251 to 262 (specific regime for real property); Federal Constitution, art. 156-A, § 6 (Constitutional Amendment 132/2023); Law 10,931/2004 (RET — historical context); STF — Theme 247 / RE 603,497 (ISS and materials in civil construction; historical section). No assertion of effective burden in percentage points (it depends on the reference rate, not yet set). Informational content; not a legal opinion.
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