Brazil is in Stage 4 of the demographic transition model, characterized by low birth rates, low death rates, and slow population growth approaching zero. With a fertility rate of 1.57 children per woman as of 2023, well below the replacement level of 2.1, Brazil is actually in the late phase of Stage 4 and showing early signs of moving toward Stage 5, where population decline begins.
Why Brazil Fits Stage 4
Stage 4 of the demographic transition model describes countries where both birth rates and death rates have fallen to low levels, resulting in very slow or stagnant population growth. Brazil checks every box. Its fertility rate dropped from 2.32 children per woman in 2000 to 1.57 in 2023, and projections from Brazil’s national statistics agency (IBGE) put it at 1.44 by 2041. Infant mortality fell from 28.1 deaths per 1,000 live births in 2000 to 12.5 in 2023. Life expectancy rose to 76.6 years in 2024, with women averaging 79.9 years and men 73.3 years.
The population is still growing, but barely. IBGE projects it will peak at about 220.4 million people in 2041, then begin shrinking, potentially dropping to 199.2 million by 2070. That projected decline is the hallmark of a country on the edge of Stage 5.
How Brazil Got Here
Brazil’s transition happened remarkably fast. In the early 1960s, the average woman had about 6.3 children. By the year 2000, that number had fallen to roughly 2.3. Most countries took a century or more to complete this kind of shift; Brazil compressed it into about four decades.
The transition didn’t happen evenly across the country. The wealthier South and Southeast regions began their fertility decline before 1960, starting from already moderate levels. The North and interior Northeast didn’t begin until after 1980, and those regions started from much higher fertility rates of nearly 7 children per woman. The pace was also faster in later-transitioning regions: areas that started before 1960 took a median of 36 years to complete the shift, while those starting after 1980 finished in roughly 19 years.
What Drove the Decline
Four factors reshaped Brazilian families over the past six decades: urbanization, women entering the workforce, rising female education levels, and widespread access to contraception. These forces reinforced each other. As more women pursued education and careers, they delayed childbearing and had fewer children overall. Research using Brazilian census data consistently finds that education and income are the strongest predictors of lower fertility, though urbanization and workforce participation amplify the effect.
Regional economic differences explain much of the uneven timing. The industrialized South and Southeast urbanized earlier and offered more educational and employment opportunities for women, triggering earlier fertility declines. The more agricultural North and Northeast followed as development spread.
Brazil’s Aging Population
The most visible consequence of Stage 4 is rapid population aging. The share of Brazilians aged 60 and older nearly doubled between 2000 and 2023, rising from 8.7% to 15.6%. The average age of the population climbed from 28.3 years in 2000 to 35.5 in 2023 and is expected to reach 48.4 by 2070.
This creates what demographers call the closing of the “demographic dividend,” the window when a country has a large working-age population relative to dependents (children and the elderly). Brazil is in the final stretch of that window. As the elderly population grows and the working-age share shrinks, the country will face increasing pressure on pension systems, healthcare, and social services.
Is Brazil Entering Stage 5?
Stage 5 is not part of the original demographic transition model, but many geographers now use it to describe countries where death rates exceed birth rates and the population shrinks. Brazil isn’t there yet, but the trajectory is clear. The fertility rate has been below replacement level for years and is still falling. Population growth is slowing toward zero, with the peak expected around 2041.
Once that peak passes, Brazil will join countries like Japan, Germany, and South Korea in Stage 5. The projected drop from 220 million to 199 million people between 2041 and 2070 represents a significant demographic shift that will reshape the country’s economy and social structure for decades. For now, the most accurate classification is late Stage 4, transitioning toward Stage 5.