Transparency
Methodology and data
See how values are calculated, which inputs are official, where approximations are used and how to avoid false precision.
Methodology version
2.0Guidance range
±12%How monthly cost is calculated
Each scenario adds four blocks. Values are rounded to tens of reais to avoid unsupported precision.
- Rent
- average price per m² × profile area × area factor
- Groceries
- local basic basket × household profile weight
- Transport
- local fare × monthly trips × area factor
- Other
- standardized household bills and recurring expenses by profile
Model assumptions
- Central areas use rent 25% above the reference and transport 15% below.
- Outer areas use rent 25% below the reference and transport 18% above.
- Home size ranges from 35 m² for one person to 80 m² for a couple with two children.
- Bills and other expenses are national standardized parameters, not a neighborhood survey.
- The ±12% range exposes minimum model uncertainty; real cases can fall outside it.
What is data and what is an estimate
Population, food baskets and inflation series come from public or institutional sources. Rent and transport combine indexes, local authorities and market references. The monthly total is an editorial model, not an official statistic.
Update policy
The database is reviewed quarterly and when a relevant source changes a fare or methodology. Sitemap dates change only when content or data actually changes.
Next planned review: outubro de 2026.
Corrections and history
Confirmed source, calculation and translation errors are corrected promptly. Material changes receive a new update date.
- August 31, 2026: IGP-M and IPCA-15 updated to August; Serasa delinquency data updated to July; Selic and DI/CDI rechecked.
- August 20, 2026: Peic updated to July; Selic and the daily DI/CDI position rechecked in the Central Bank official series.
- August 17, 2026: Rent and basic food basket updated to July; IPCA, INPC and regional readings updated from IBGE Sidra; ad scope limited to reviewed editorial guides.
- August 10, 2026: Selic target, DI/CDI and IGP-M updated from official series; cost-of-living data, IPCA, INPC and IPCA-15 checked with no change.
- July 29, 2026: July IPCA-15 and the daily CDI reference updated; IPCA, INPC, IGP-M, Selic and cost-of-living data checked.
- July 16, 2026: Methodology 2.0: uncertainty range, equivalent income, charts and language parity.
- July 10, 2026: Rent, food basket, transport and complete inflation series updated through 2025.
Main sources
The links below allow readers to verify source material. Pages identify limitations where no consolidated local index exists.
IBGE - Estimativas da População 2025IBGE - estimativa municipal no DOU 2025FipeZAP Locação Residencial - julho/2026DIEESE/Conab Cesta Básica - julho/2026SPTrans - tarifas vigentesDiário do Transporte - tarifa municipal do Rio em 2026GDF - tarifas congeladas até 2026Agência Brasil - tarifa de Fortaleza em 2026Prefeitura de Salvador - tarifa 2026Prefeitura de Belo Horizonte - tarifas 2026Prefeitura de Manaus - tarifa 2026Prefeitura de Curitiba - tarifa 2026Grande Recife - tarifasRMTC Goiânia - tarifa BRTBelém - decreto tarifárioPorto Alegre - Decreto 23.669/2026Prefeitura de São Luís - Bilhete ÚnicoViva Real - aluguel em Porto VelhoViva Real - aluguel em Rio BrancoViva Real - aluguel em PalmasFlatSpotter - aluguel em MacapáRentola - aluguel em Boa VistaConsórcio Guaicurus - tarifa Campo GrandePrefeitura do Natal - tarifa de ônibusPrefeitura de Aracaju - tarifa 2026Consórcio Fênix - tarifa FlorianópolisGVBus - tarifa Grande VitóriaPrefeitura de Palmas - tarifaPrefeitura de Porto Velho - tarifa