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Replacing the projected retiring baby boomer nursing cohort 2001 – 2026
© Schofield; licensee BioMed Central Ltd. 2007
Received: 07 September 2006
Accepted: 16 June 2007
Published: 16 June 2007
The nursing population in Australia is ageing. However, there is little information on the rate and timing of nursing retirement.
Specifically designed health workforce extracts from the Australian Bureau of Statistics (ABS) censuses from 1986 to 2001 are used to estimate the rate of nursing retirement. The 2001 nursing data are then "aged" and retirement of the nursing workforce projected through to 2026. ABS population projections are used to examine the future age structure of the population and the growth and age distribution of the pool of labour from which future nurses will be drawn.
Attrition rates for nurses aged 45 and over are projected to be significantly higher between the base year of 2006 and 2026, than they were between 1986 and 2001 (p < 0.001).
Between 2006 and 2026 the growth in the labour force aged 20 to 64 is projected to slow from 7.5 per cent every five years to about 2 per cent, and over half of that growth will be in the 50 to 64 year age group. Over this period Australia is projected to lose almost 60 per cent of the current nursing workforce to retirement, an average of 14 per cent of the nursing workforce every five years and a total of about 90,000 nurses.
The next 20 years will see a large number of nursing vacancies due to retirement, with ageing already impacting on the structure of the nursing workforce. Retirement income policies are likely to be a key driver in the retirement rate of nurses, with some recent changes in Australia having some potential to slow retirement of nurses before the age of 60 years. However, if current trends continue, Australia can expect to have substantially fewer nurses than it needs in 2026.
In Australia, two major government reports, the Intergenerational Report  and the Report on the Economic Implications of an Ageing Australia  have identified future budget pressures as a threat to the sustainability of the Commonwealth budget and the availability of health services to future generations. One of the main drivers was found to be growth in health expenditure. However, the shrinking supply of labour as the health workforce ages and retires may pose just as large a threat to the availability of health services.
There is no doubt that the health workforce is ageing [3, 4] however, the timing of potential shortages depend upon when health professionals choose to retire. Nurses are the largest health professional group and, in the past in Australia, they have retired significantly earlier than medical practitioners . As the oldest of the large baby boomer cohort turns 60 this year we can expect nursing retirement in significant numbers over the next ten to fifteen years.
However, there are few papers from Australia or other countries which project the rate or timing of nursing retirement [6, 7] although a number have indicated that nursing shortages are anticipated as the nursing population ages [8–10]. At the same time as a large proportion of the nursing workforce will be entering retirement, projected growth in the size of the labour market is expected to slow . Understanding the timing and extent of nursing retirement is particularly important as there is already a shortage of nurses in all Australian States and Territories – listed on the National Skill Shortage List released annually by the Department of Education, Science and Training .
This paper used a specially defined extract from the past four Australian Bureau of Statistics (ABS) full Censuses for the years 1986, 1991, 1996 and 2001 to measure and then project future nursing retirement through to 2026 and ABS population projections to estimate the size of the labour pool from which the future workforce will be drawn.
Australian Bureau of Statistics (ABS) population estimates and projections were obtained to 2025 by single year of age and by sex [12, 13]. The series used was the medium growth Series B, which assumes medium population growth resulting from medium migration, life expectancy and fertility. (Series A assumes high population growth as a result of higher migration, life expectancy and fertility and Series C assumes low population growth and has the same life expectancy and fertility assumptions as series B but lower migration.)
The population estimates were used to prepare population pyramids to examine ageing of the general population and the size and age distribution of the pool of labour from which future nurses will be drawn.
where CAR= Cumulative attrition rate, N = number of people, ti=census date and t1=first census in series (1986).
The nursing population in 2001 was "aged" so that for every five years in the future, each five year age group moved up to the age group five years older to represent the nursing population in 5, 10, 15, 20 and 25 years time. The attrition estimates were applied every five years to estimate the net number of nurses aged 45 years who would leave the workforce as they aged. Attrition from 2001 to 2006 was estimated to establish a current base year for projections from 2006 to 2026.
It was assumed that past patterns of attrition within each five year age group would be maintained into the future and that between the ages of 75 and 80 all remaining nurses retired. This was a reasonable assumption as there were very small numbers in the 75+ age group. Sensitivity analysis was undertaken to determine the effect of a higher or lower rate of retirement than that projected.
Statistical analysis was undertaken using SAS (version 9.1). All tests were undertaken at the 5% level of significance. Tests of association between categorical variables were done using chi-squared tests. Although the data was from a full national census, tests were undertaken to determine whether differences over time within the nursing workforce were of a sufficient magnitude to be statistically significant.
Nursing ageing and retirement
Nursing population by age, 1986 – 2001
Cumulative rates of retirement of nurses from 1986
Number of years later
Age at start year
Nursing retirement 1986 to 2006 and forecast 2006 to 2026
Base year 2006
Number in each period
% of workforce in base year
Base year 1986
By contrast to the rapid attrition from 2006 onwards, between 1986 and 2001, only about a net 7 per cent of nurses over the age of 45 years left the workforce every 5 years (table 3). A comparison of the total number of nurses 45 years and over who left the workforce indicates that retirement rates will be significantly higher between 2006 and 2026 than they were between 1986 and 2001 and (p < 0.001). Between 2001 and 2006 however, there was estimated to be a net loss of 17 per cent due to older nurses leaving the workforce. About half of this larger figure is due to the oldest of the baby boomers aged about 55 to 60 years beginning to retire. This indicates that we have already entered a period of rapid retirement of older nurses from the workforce.
The large baby boomer cohort aged about 40 to 60 years made up 60 per cent of the nursing workforce in the census of 2001. A further 13 per cent are from older cohorts. The more rapid rate of attrition in the forecast from 2006 to 2026 than in 1986 to 2006 results largely from the movement of the baby boomer cohort, then aged about 40 to 60 in 2006, out of the workforce.
Further compounding the shrinking pool of labour from which to hire new nurses is the age groups in which the highest rates of labour growth will occur. 28 per cent of total growth from 2006 to 2026 will come from the 60–64 year age group and 56 per cent from the 50 to 64 age groups – the age groups from which nurses are more likely to be retiring than entering the labour force. This means that even as the growth in the labour force slows to less than a third of its current rate, less than half the growth in the labour force is likely to form part of the pool of labour from which nurses can be drawn to replace retiring nurses.
Nursing labour supply and demand
From 2006 to 2026, the total population is expected to grow by 24% and the population aged 65 years or more by 79%. This growth in the aged population, even when offset by current policies which reduce hospital stay, has been projected to result in an increased demand for hospital bed days of about 40% from 2005 to 2025.
However, the population aged less than 30 years (when the majority of nursing students commence study) is only projected to grow by 8%. According to the Department of Employment, Training and Youth Affairs , approximately 8,000 students commenced a nursing degree each year and about 4,800 of those could be expected to complete within four years. By 2025, if the same proportion of the population under 30 years of age chose nursing as a career, there would be approximately, 5,100 completions per annum or about 25,800 completions in the five years to 2025. These students would fill the roughly 20,000 to 25,000 positions vacated by retiring nurses. However, this number of new nurses would not be adequate to also provide for the increased demand of a more aged population or the attrition from nursing that occurs prior to the age of 45 years.
Discussion – the role of retirement income policy
Why is it that we have entered this rapid period of nursing retirement which is set to continue to 2026? Ageing of the population is part of the explanation, with about 75 per cent of the nursing population in the baby boomer cohort or older. Further explanations from Australia and other countries include a decline in nursing undergraduate commencements , retention difficulties and the higher average age of new graduates from nursing programs. 
These are the demographic and social underpinnings of this phase of rapid retirement from 2001 to 2026. But there is a policy environment in Australia that promotes nursing retirement before the age of 60 years. Most baby boomer and older nurses are employed within the hospital system and have access to employer superannuation. Those employed by public hospitals will have been required to join the State Authorities Superannuation Scheme (SASS) or the State Superannuation Scheme (SSS). These are savings schemes contributed to by members and the employer. They provide a "defined benefit" which is an accrued multiple of the employee's final average salary. The SASS was introduced in 1988 and was closed to new members in 1992 . Those who retire can take their benefits at their eligible retirement age of either 55 years (for members who transferred from older schemes) or 58 years. The SSS was introduced prior to the SASS, but was closed in 1988 when the SASS was introduced. Under the SSS, members elected a retirement age of 55 or 60 years and contributed their savings accordingly with higher contributions for those who chose the younger retirement age. However, it is possible for a nurse who elected retirement at 60 to retire earlier once they have reached 55 years, but their pension will be at a lower rate.
Nurses in these two schemes would be in the baby boomer or older cohorts now aged about 40 years or more and this helps explain the high rate of retirement between 55 and 60 years. It also suggests that the currently gradual increasing of age of eligibility for age pension for women in Australia from 60 years of age to 65 years of age and incentives to delay retirement  may not result in high workforce participation of older nurses.
Increasing the average retirement age of nurses would go some way to alleviating future workforce shortages. Biviano et al  indicates that delaying nursing retirement by 4 years has a modest effect (9 per cent in 2020) on increasing nursing supply in projections of nursing supply for the US.
Until recently, retirees have not been able to draw a pension and continue to work part time which has been a disincentive to retire partially rather than completely. However, newly introduced changes to superannuation in Australia will provide more incentive for nurses and other Australians to keep working. The Australian Government have changed the superannuation rules to allow workers to continue to work while drawing on a superannuation pension from 1 July 2005 . This may encourage nurses, and particularly women with children with a lower accumulated balance because of broken employment patterns, to continue to work. However it remains to be seen whether this economic incentive will be sufficient to persuade nurses to work longer as there are other non-economic reasons why nurses may have been retiring early, including musculoskeletal injuries and the heavy physical nature of nursing , job characteristics such as inflexibility of shift work, working conditions and relatively low pay for the skills required  and, for women, aligning their retirement age with on average older husbands [5, 23].
Growth in the labour market age 20–64, Australia, 2006 to 2026
% for age group
% of total growth
The author would like to Thank Arul Earnest for statistical advice. The Northern Rivers University Department of Rural Health receives infrastructure funding through NSW Health as part of the Australian Rural Health Research Collaboration.
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