From 1996 to 1999-2000, no income tax was paid on incomes below $5400.
From the following financial year to 2011/12, no income tax was paid on incomes below $6000.
This changed in the last financial year, extending the tax exempt income to $18,200.
Higher wage earners face income tax, paying a certain percentage of every dollar earned above the applicable wage bracket. Higher earners are also charged additional annual payments.
First tax bracket
From 1996-97 to 1999-2000, the first income tax bracket ranged from $5401 to $20,700.
From the following financial year to 2002-03, the first bracket changed to $6001 to $20,000, before changing again in 2003-2004 to $6001 to $21,600.
The upper end of the bracket changed several times in the coming years, from $25,000 to $30,000 to $34,000 over 2006-07 to 2008-09 respectively. It was raised again the following year to $35,000, before being raised to $37,000 in 2010-11.
No payments are required for taxpayers within the first bracket.
Second tax bracket
From 1996-97 to 1999-2000, the second tax bracket ranged from $20,701 to $38,000. In 2000-01, the bracket widened to $20,001 to $50,000 before changing to $21,601 to $52,000 in 2003-04.
The upper end of the bracket changed the following three financial years to $58,000, $63,000 and $75,000 respectively. The lower end of the bracket also jumped to $25,001 in 2006-07.
The bracket changed again in 2007-08 to $30,001 to $75,000, before jumping to $34,001 to $80,000 the following year. The lower end of the bracket rose over the following two financial years to $35,001 and $37,001 respectively.
Additional payments are also applicable in the second tax bracket, calculated as $3060 from 1996-97 to 1999-2000.
It fell to $2380 in 2000-01, before rising slightly in 2003-04 to $2652.
The payment fell again to $2340 in 2005-06, before increasing to $2850 the following financial year.
The payment continued to increase year on year - from $3600, $4200, $4350 to $4650 – from 2007-08 to 2010-11, before falling to $3572 in 2012-13.
Third tax bracket
From 1996-97 to 1999-2000, the third tax bracket ranged from $38,001 to $50,000.
In 2000-01, the bracket changed to $50,001 to $60,000, before changing again in 2003-4 to $52,001 to $62,500.
The bracket changed the following financial year to $58,001 to $70,000, before shifting to $63,001 to $95,000 in 2005-06 and $75,001 to $150,000 in 2006-07.
In 2008-09, the third tax bracket changed to $80,001-$180,000, where it remained as of May 2014.
Additional payments are also applicable in the third tax bracket, which was calculated at $8942 in 1996-97.
It was increased to $11,380 in 2000-01, before jumping again to $11,772 in 2003-04. The payment figure increased repeatedly over the following financial years, from $13,572 in 2004-05 to $17,850 in 2006-07.
It fell the following financial year to $17,100, before increased to $18,000 in 29008-09 and then dropping to $17,850 in 2009-10.
It dropped the following year by $300, before changing to $17,547 in 2012-13.
Fourth tax bracket
From 1996-97 to 1999-2000, the highest tax bracket had a minimum annual wage of $50,001.
In 2000-01, it rose to $60,001 before jumping again to $62,501 in 2003-04. The minimum increased the following financial year to $70,000, then increased to $95,001 in 2005-06 and $150,001 in 2006-07.
It rose again in 2008-09 to $180,001, where it remained as of May 2014.
Additional payments are also applicable in the highest tax bracket, calculated at $14,102 in 1996-97.
It increased to $15,580 in 2000-01, then to $16,182 in 2003-04 and $18,612 in 2004-05. It rose again the following financial years to $28,200 in 2004-05 and $47,850 in 2005-06, before falling to $47,100.
The payment then altered between $54,550 and $58,000 in the following years, before changing to $54,550 as of May 2014.
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