In 1979, Australia abolished federal inheritance taxes. Using daily deaths data, we show that approximately 50 deaths were shifted from the week before the abolition to the week after (amounting to over half of those who would have been eligible to pay the tax). Our results imply that over the very short run, the death rate is highly elastic with respect to the inheritance tax rate.behavioural responses to taxation, timing of deaths, estate tax

Andrew Leigh

Joshua S. Gans

English

Research Papers in Economics

     The Australian National University 
Centre for Economic Policy Research 
DISCUSSION PAPER 
 
 
 
Did the Death of Australian Inheritance Taxes Affect 
Deaths? 
 
 
 
Joshua S. Gans and Andrew Leigh 
 
 
 
 
 
 
 
DISCUSSION PAPER NO. 530 
August 2006 
 
 
 
 
 
 
 
 
 
ISSN: 1442-8636 
ISBN: 1 92126201 X 
Joshua S. Gans, Melbourne Business School, University of Melbourne 
Email: J.Gans@unimelb.edu.au,  www.mbs.edu/jgans/
 
Andrew Leigh, Social Policy Evaluation, Analysis and Research Centre, Research School of Social 
Sciences, Australian National University 
Email:  andrew.leigh@anu.edu.au,   http://econrsss.anu.edu.au/~aleigh/
 
 
Acknowledgements 
Thanks to Elena Varganova for outstanding research assistance 
  
ABSTRACT 
 
In 1979, Australia abolished federal inheritance taxes. Using daily deaths data, 
we show that approximately 50 deaths were shifted from the week before the 
abolition to the week after (amounting to over half of those who would have been 
eligible to pay the tax). Our results imply that over the very short run, the death 
rate is highly elastic with respect to the inheritance tax rate. 
 
 
 
JEL Codes: H26, I12 
 
Keywords: behavioural responses to taxation, timing of deaths, estate tax 
 
  iiI.  Introduction 
According to Benjamin Franklin, there are two certainties in life: death and taxes. 
But can changes in taxation affect the death rate? Is it possible that some people will 
prolong life in order to reduce their inheritance tax bill?  
The seminal study of the responsiveness of death rates to inheritance tax changes 
is Kopczuk and Slemrod (2003), who analyse a series of changes to the US estate tax. 
Their results are not consistent across all tax changes, but overall, they find a small 
positive death elasticity. This accords with other studies that have found that changes in 
tax rates and benefits can effect the timing of marriages (Sjoquist and Walker 1995; Alm 
and Whittington 1995) and births (Dickert-Conlin and Chandra 1999; Gans and Leigh 
2006a). Non-economic factors may be important too. For example, Gans and Leigh 
(2006b) find that the millennium coincided with an increase in the number of 
conceptions, births and deaths in Australia.  
In this paper, we study a more dramatic change than that analysed by Kopczuk 
and Slemrod – the complete elimination of inheritance taxes in Australia. Prior to their 
abolition in 1979 Australian rates had been high, with rates and thresholds having 
remained largely unchanged during the high inflation of the 1970s. Afterwards, 
inheritances were entirely exempt from federal inheritance taxes. Indeed, Australia today 
remains one of the only developed nations without some form of explicit or de facto 
inheritance tax.
1  
                                                 
1 While Canada abolished its inheritance tax in the 1970s, it now taxes realized capital gains at death—
amounting to a de facto form of inheritance tax. II.  Australian Inheritance Taxes  
A campaign to abolish inheritance taxes in Australia took hold during the 1970s.
2 
The first victory of the abolitionist was the announcement by the state of Queensland in 
1976 that it would abolish all state inheritance taxes. Over the next two years, most of 
Australia’s other states followed Queensland’s lead, and abolished their state inheritance 
taxes. This gave momentum to the federal abolitionist movement, and in November 1977, 
the federal government formally announced that it would scrap federal inheritance taxes. 
The federal legislation was finally passed in June 1978, to take effect a year later. Since 
the Australian tax year runs from 1 July to 30 June, any person dying on or before 30 
June 1979 was subject to federal inheritance taxes, while any person dying on or after 1 
July 1979 was entirely exempt from inheritance taxes. 
Unlike other moves to eliminate inheritance taxes (for example, the legislated 
abolition of the US estate tax from January 1, 2010), the Australian rates were not phased 
down prior to abolition. Indeed, the inheritance tax rates and thresholds had remained 
largely unchanged from 1941 to 1979, despite the fact that inflation had substantially 
reduced the real value of the thresholds. 
Prior to abolition, the rates prevailing on Australian estates operated on a sliding 
scale (Commissioner of Taxation 1979).
3 Estates worth less than $100,000 were tax-
exempt if passing to non-family members, and estates worth less than $200,000 were 
exempt if passing to family members.
4 The highest rate was 27.9 percent, which applied 
                                                 
2 For more background on the abolition of inheritance taxes in Australia, see Pedrick (1981); Smith (1993). 
3 All figures in this paper are in 1979 Australian dollars. Multiplying by 3.55 yields 2006 Australian 
dollars.  
4 Family members were defined as the widow, widower, children, or grandchildren. 
  2to estates worth $1 million or more.
5 Figure 1 shows the inheritance tax rate schedule. 
Gifts were also dutiable, and subject to a similar set of tax rates.  
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250000 500000 750000 1000000 1250000
Estate value
Estates passing to family
Estates passing to non-family
Figure 1: Inheritance Tax Rates Prior to Abolition
 
During 1978-79, the last tax year in which the inheritance tax applied, the 
Australian Taxation Office assessed duty on 9828 estates. This is equivalent to 9 percent 
of the 108,840 Australians who died during that tax year. Among those who paid the 
inheritance tax, the median duty was $1935 (3 percent of estate value), and the mean duty 
was $7764 (8 percent of estate value). Across all those who died in tax year 1978-79, the 
median duty was zero (the typical decedent was exempt), and the mean duty was $701. 
To put this in context, average per-capita wealth in June 1979 is estimated to have been 
$26,700 (Australian Treasury 2005). 
                                                 
5 The exempt amount was 20 percent higher for the estates of deceased primary producers.  
  3III.  Empirical Analysis 
To test whether the timing of deaths responds to the inheritance tax rate, we use 
daily data on the number of Australian deaths. These data are collected by state and 
territory offices of births, deaths and marriages, and compiled by Australian Bureau of 
Statistics.
6 They cover all recorded deaths from January 1, 1974 to December 31, 2003.
7  
Figure 2 charts the number of deaths during the final week of June and the first 
week of July 1979. In the last week of June, when inheritance taxes still applied, the 
number of deaths dropped sharply; before rising in July, immediately after the tax was 
abolished.  
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Figure 2: Number of Deaths Before and After the
Abolition of Inheritance Taxes on 1 July 1979
 
                                                 
6 We were unable to obtain deaths data disaggregated by state/territory. Nor were we able to obtain data on 
the demographic characteristics of decedents. 
7 We opt to use the raw number of deaths as our dependent variable (instead of the death rate) since the 
population denominator is only available on a monthly basis. Given that our analysis spans the end of June 
and the beginning of July, dividing by monthly population figures would only induce measurement error 
into our analysis. Our econometric analysis includes year fixed effects, thus allowing for nonlinear changes 
in the population denominator from year to year. 
  4 
To formally test the effect of the abolition of inheritance taxes on the number of 
deaths, we estimate the regression: 
 
12 3 4
NoTax DayOfWeek DayOfYear Year
ii i i i Deaths I I I I i β ββ β =+ + + ε +
                                                
    (1) 
 
Where Deaths is the number of people recorded as having died on day i, and the indicator 
variables respectively denote the period after inheritance taxes had been abolished   
(deaths on or after 1 July 1979), the day of the week (eg. Monday, Tuesday), the day of 
the year (eg. day number 182 is 30 June, day number 183 is 1 July), and the calendar 
year.
8 We estimate the regression both with the dependent variable as the number of 
deaths, and the log of the number of deaths. By using all data over a thirty-year period, 
we are able to precisely identify day of week, day of year, and year effects, and 
distinguish these effects from the abolition of the inheritance tax.
9  
To see the effect of the abolition of inheritance taxes on the timing of deaths, we 
progressively widen the window of analysis. The first column of Table 1 restricts the 
sample to the last 3 days of June and the first 3 days of July, the second column to the last 
5 days of June and the first 5 days of July, and the third to the last 7 days of June and the 
first 7 days of July. In the seven-day window, the mean number of deaths per day was 
 
8 Since our focus is on effects that might be specific to 28 June, 29 June, and so on, we define a day of the 
year variable that is unaffected by leap years.  
9 We are not aware of any other policies after 1979 that would have affected the decision to die in one tax 
year relative to the next. In 1976-78, the abolition of state inheritance taxes may have created an incentive 
to die in the subsequent tax year, but since we are using data aggregated to the national level, this effect is 
likely to have been small. In any case, our results are robust to dropping these earlier years from our 
analysis. 
  5372.13, and the standard deviation was 34.25. Over the same period, the mean of the 
ln(number of deaths) measure was 5.91, with a standard deviation of 0.09. 
 
Table 1: Do Inheritance Taxes Affect Deaths? 
 (1)  (2)  (3) 
Window  ±3 days  ±5 days  ±7 days 
Panel A: Dependent variable is number of deaths
No Inheritance Tax  24.185**  22.629**  14.202* 
 [11.964]  [9.284]  [8.376] 
Observations 180  300  420 
R-squared 0.75  0.69  0.67 
Total number of deaths 
shifted  36 57  50 
Panel B: Dependent variable is ln(number of deaths)
No Inheritance Tax  0.076**  0.071**  0.046* 
 [0.036]  [0.029]  [0.026] 
Observations 180  300  420 
R-squared 0.74  0.7  0.68 
Notes: Robust standard errors in brackets. * significant at 10%; ** significant at 5%; *** significant at 1%.  
All specifications use data from 1974-2003, and include day of year, day of week, and year fixed effects. 
Window denotes the number of days before and after the start of July. For example, the ±7 day window 
covers the last seven days of June and the first seven days of July. Total number of deaths shifted is half the 
No Inheritance Tax coefficient, multiplied by the number of days in the window that fall on July 1 or later. 
 
We observe a statistically significant effect of the abolition of inheritance taxes on 
the number of deaths. Our estimates suggest that about 50 reported deaths were shifted 
from the last week in which the inheritance tax applied to the first week of its abolition, 
with most of the effect occurring within three days of the policy change. Since our 
analysis is based only on formal death records, we cannot reject the possibility that the 
effect we observe reflects misreporting of the death date, rather than changes in the actual 
timing of deaths.  
While the effect magnitude that we observe seems small in absolute terms, it 
suggests that around 5 percent of all deaths occurring during that window were shifted 
out of the eligibility range. Since only 9 percent of all decedents paid inheritance taxes, 
  6this indicates a very high elasticity among eligibles.
10 Dividing the effect by the share of 
eligibles suggests that over half of those who would have paid the inheritance tax in its 
last week of operation managed to avoid doing so. 
IV.  Conclusion 
Public finance is often motivated by the insight that individuals appear to be 
motivated – at least in part – by a bequest motive. Viewed in this light, it is perhaps not 
so surprising to learn that a policy change that causes a sharp discontinuity in the value of 
one’s bequest may affect the timing of death.  
These findings have implications for any instance in which policymakers are 
proposing to abolish inheritance taxes. For example, under current US law, the estate of 
an individual worth more than $3.5 million will be taxed at a marginal rate of 45 percent 
if they die in the final week of December 2009, but untaxed if they die in the first week of 
January 2010. Our results from the abolition of inheritance taxes in Australia suggest that 
a significant number of US taxpayers who would face the estate tax if they died in the last 
week of 2009 may well shift their reported death date to the first week of 2010. Even the 
super-rich cannot cheat death forever, but some may be able to stay alive long enough to 
avoid the estate tax. 
Indeed, it is even plausible that the timing of deaths may be affected by the 
introduction of an inheritance tax. If the elasticity of the death rate with respect to a rise 
in inheritance taxes is of the same magnitude as the elasticity of the death rate with 
                                                 
10 We believe that the marginal decedent would know both the size of their estate and the prevailing 
inheritance tax rates with a high degree of certainty. It is therefore unlikely that the abolition induced a 
behavioural change among those whose estates were too small to be eligible. Conversely, since there was 
considerable media coverage given to the abolition of federal inheritance taxes, it is unlikely that eligibles 
would have been ignorant of the date of abolition.  
  7respect to a fall in inheritance taxes, then any country that introduces an inheritance tax 
should expect a spike in the death rate in the week before the law takes effect.  
 
  8References 
Alm, James, and Leslie Whittington, (1995), “Does the Income Tax Affect Marital 
Decisions?” National Tax Journal 48(4), 565–572. 
 
Australian Treasury (2005), Australian Net Private Wealth. Canberra, Australian 
Treasury. Available at http://www.treasury.gov.au. 
 
Commissioner of Taxation (1979), Annual Report, 1978-79. Canberra, Australian 
Taxation Office. 
 
Dickert-Conlin, S. and A. Chandra (1999), “Taxes and the Timing of Births,” Journal of 
Political Economy, 107 (1), pp.161-177. 
 
Gans, J.S. and A. Leigh (2006a) “Born on the First of July An (Un)natural Experiment in 
Birth Timing”, mimeo., Melbourne. 
 
Gans, J.S. and A. Leigh (2006b) “The Millennium Bub”, mimeo., Melbourne. 
 
Kopczuk, W. and J. Slemrod (2003), “Dying To Save Taxes: Evidence From Estate-Tax 
Returns On The Death Elasticity,” Review of Economics and Statistics 85(2): 
256–265 
 
Pedrick, W.H. (1981), “Oh! To Die Down Under! Abolition of Death and Gift Duties in 
Australia” Tax Lawyer 35(1): 113-142 
 
Sjoquist, D.L., and M.B. Walker (1995), “The Marriage Tax and the Rate and Timing of 
Marriage,” National Tax Journal 48(4), 547–558. 
 
Smith, J.P (1993), Taxing Popularity: The Story of Taxation in Australia. Canberra, 
Federalism Research Centre, ANU. 
 
  9

Did the Death of Australian Inheritance Taxes Affect Deaths?

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Did the Death of Australian Inheritance Taxes Affect Deaths?

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