This resulted in the allowance being raised to £9,440 from April 2013, before being increased to £10,000 from April 2014, a year earlier than originally planned. All these increases in the personal allowance came from rises in the personal tax.
The initial increase in the allowance resulted in its value being raised to £9,440 starting from April 2013, followed by an earlier-than-expected boost to £10,000 from April 2014. These adjustments to the personal allowance were brought about by increases in individual income tax.