In short
Over the 12 months to September 2026, the IGP-M changed by +3.35% and the IPCA by +4.58%. A R$2,000 rent adjusted on those 12 months becomes R$2,067.00 with the IGP-M and R$2,091.60 with the IPCA. Over the last two years the two indexes have differed by up to 6.47 points (12 months to February 2026): which index the lease names changes the new rent.
12-month change, month by month
| 12 months to | IGP-M | IPCA | R$2,000 rent with IGP-M | With IPCA |
|---|---|---|---|---|
| September 2026 | +3.35% | +4.58% | R$2,067.00 | R$2,091.60 |
| August 2026 | +2.18% | +4.22% | R$2,043.60 | R$2,084.40 |
| July 2026 | +2.77% | +4.44% | R$2,055.40 | R$2,088.80 |
| June 2026 | +3.18% | +4.64% | R$2,063.60 | R$2,092.80 |
| May 2026 | +1.96% | +4.72% | R$2,039.20 | R$2,094.40 |
| April 2026 | +0.62% | +4.39% | R$2,012.40 | R$2,087.80 |
| March 2026 | -1.82% | +4.14% | R$1,963.60 | R$2,082.80 |
| February 2026 | -2.66% | +3.81% | R$1,946.80 | R$2,076.20 |
| January 2026 | -0.90% | +4.44% | R$1,982.00 | R$2,088.80 |
| December 2025 | -1.04% | +4.26% | R$1,979.20 | R$2,085.20 |
| November 2025 | -0.10% | +4.46% | R$1,998.00 | R$2,089.20 |
| October 2025 | +0.92% | +4.68% | R$2,018.40 | R$2,093.60 |
| September 2025 | +2.83% | +5.17% | R$2,056.60 | R$2,103.40 |
| August 2025 | +3.03% | +5.13% | R$2,060.60 | R$2,102.60 |
| July 2025 | +2.96% | +5.23% | R$2,059.20 | R$2,104.60 |
| June 2025 | +4.39% | +5.35% | R$2,087.80 | R$2,107.00 |
| May 2025 | +7.03% | +5.32% | R$2,140.60 | R$2,106.40 |
| April 2025 | +8.51% | +5.53% | R$2,170.20 | R$2,110.60 |
| March 2025 | +8.59% | +5.48% | R$2,171.80 | R$2,109.60 |
| February 2025 | +8.44% | +5.06% | R$2,168.80 | R$2,101.20 |
| January 2025 | +6.75% | +4.56% | R$2,135.00 | R$2,091.20 |
| December 2024 | +6.54% | +4.83% | R$2,130.80 | R$2,096.60 |
| November 2024 | +6.33% | +4.87% | R$2,126.60 | R$2,097.40 |
| October 2024 | +5.58% | +4.76% | R$2,111.60 | R$2,095.20 |
12-month change = product of the 12 monthly changes ending in the month shown. Payotte's IPCA figure matches the 12-month IPCA series published by the Banco Central do Brasil (SGS 13522).
Questions
What is the IGP-M over 12 months to September 2026?
+3.35%, computed by Payotte from the monthly changes published by the Banco Central do Brasil (FGV series). The IPCA was +4.58%.
Which months count for my adjustment?
Those your lease names: check the adjustment clause for the index and the 12-month period it uses, then read that row of the table.
General information drawn from the official sources cited and dated on this page. It is not legal, tax or financial advice: for your own situation, ask a licensed professional.